CN106023900A - Organic light-emitting display panel and driving method thereof - Google Patents

Organic light-emitting display panel and driving method thereof Download PDF

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Publication number
CN106023900A
CN106023900A CN201610623315.0A CN201610623315A CN106023900A CN 106023900 A CN106023900 A CN 106023900A CN 201610623315 A CN201610623315 A CN 201610623315A CN 106023900 A CN106023900 A CN 106023900A
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China
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described
transistor
pole
signal output
module
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CN201610623315.0A
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Chinese (zh)
Inventor
吴桐
邹文晖
李玥
钱栋
刘刚
朱仁远
向东旭
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上海天马有机发光显示技术有限公司
天马微电子股份有限公司
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Priority to CN201610623315.0A priority Critical patent/CN106023900A/en
Publication of CN106023900A publication Critical patent/CN106023900A/en

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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]
    • 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]
    • G09G3/3266Details of drivers for scan electrodes

Abstract

The invention discloses an organic light-emitting display panel and a driving method thereof. The organic light-emitting display panel comprises multiple rows of pixel units and multiple driving circuit units; each pixel unit row comprises multiple pixel circuits, and each pixel circuit comprises a first initialization module, a second initialization module, a threshold value compensation module, a data writing module, a light emitting control module, a storage module, a driving transistor and an organic light-emitting diode, and each driving circuit unit comprises a first driving circuit and a second driving circuit, wherein the first driving circuit comprises a first scanning signal output circuit and a light-emitting signal output circuit which are electrically connected with more than two rows of the pixel circuits simultaneously, and the second driving circuit comprises more than two second scanning signal output circuits which are electrically connected with more than two rows of the pixel circuits in a one-to-one correspondence mode.

Description

A kind of organic electroluminescence display panel and driving method thereof

Technical field

The present invention relates to display field, particularly relate to a kind of organic electroluminescence display panel and driving method thereof.

Background technology

Organic Light Emitting Diode shows as a new generation, in recent years enjoys industry to favor.Drive as a kind of electric current Ejector half light-emitting component, the brightness uniformity of organic electroluminescence display panel is easily floated by self transistor threshold voltage Shifting, trace resistances cause the restriction of voltage degradation factor.

Figure 1A is a kind of typical OLED pixel circuit in prior art, and Figure 1B is its corresponding work Make sequential chart.As shown in Figure 1A, image element circuit include the first transistor T1, transistor seconds T2, Three transistor T3, the 4th transistor T4 and driving transistor T5, electric capacity CstAnd light-emitting component D.Its In, the grid of the first transistor T1 and the first scan signal line L1 connect, the first of the first transistor T1 Pole is connected with data wire DL, second pole of the first transistor T1 and electric capacity CstThe first end connect, the The grid of two-transistor T2 is connected with LED control signal line E1, first pole of transistor seconds T2 and ginseng Examine the second pole and the electric capacity C of pressure-wire RL connection, transistor seconds T2stFirst end connect, electric capacity CstThe second end with drive transistor T5 grid is connected, the grid of third transistor T3 and second scan Holding wire L2 connects, the first pole of third transistor T3 is connected with the grid of driving transistor T5, the 3rd Second pole of transistor T3 is connected with the second pole of described driving transistor, drives the first of transistor T5 Pole is connected with the first power voltage terminal VDD, the grid of the 4th transistor T4 and LED control signal line E1 Connect, first pole of the 4th transistor T4 is connected with the second pole driving transistor T5, the 4th transistor Second pole of T4 is connected with the anode of light-emitting component D, the negative electrode of light-emitting component D and second source voltage end VEE connects.The first transistor T1, transistor seconds T2, third transistor T3, the 4th transistor T4, Transistor T5 is driven to be PMOS.

Some problems present in this image element circuit specific works process of time chart analysis in conjunction with Figure 1B.Its In the middle t1 moment, the first scan signal line L1 exports high level signal, the second scan signal line L2 and luminescence Control signal wire E1 output low level signal, transistor seconds T2, third transistor T3, the 4th crystal Pipe T4 turns on, the reference voltage V of reference voltage line RL transmissionrefTransistor seconds T2 transmission through conducting To electric capacity CstThe first end, coordinate electric capacity CstCoupling effect, the t1 moment complete to drive transistor The initialization of T5.At this moment, turn on and the 4th owing to driving the grid of transistor T5 to be initialised Transistor T4 turns on, and therefore, light-emitting component D is luminous.Due to organic electroluminescence display panel at this moment not Needing luminescence, therefore, the light-emitting component D luminescence in the t1 moment makes the power consumption of whole image element circuit increase, Create the problem that dark-state is the darkest simultaneously.

In the t2 moment, the first scan signal line L1 and the second scan signal line L2 output low level signal, LED control signal line E1 exports high level signal, and the first transistor T1, third transistor T3 turn on, And drive transistor T5 to be held on after the initialization in t1 moment, therefore at this moment t2 pixel electricity The road threshold voltage V to driving transistor T5thCapture, until driving the grid voltage of transistor T5 Become VDD+Vth.Meanwhile, the voltage data signal V of data wire DL transmissiondataThe first crystalline substance through conducting Body pipe T1 transmits to the first electric capacity CstThe first end, the current potential of primary nodal point N1 is by VrefBecome Vdata, Due to the first electric capacity CstCoupling, drive transistor T5 grid voltage also can change, i.e. Secondary nodal point N2 can not maintain constant initialization voltage Vref, therefore it cannot be guaranteed that drive transistor T5 In the unlatching in whole t2 moment, impact drives the threshold value of transistor T5 to capture so that compensation effect is abnormal.

As can be seen from the above analysis, there is dark, the compensation exception of dark-state etc. in the image element circuit of prior art Problem.Meanwhile, along with the development of high PPI (Pixels Per Inch) display floater, the quantity of pixel is continuous Increase, in the case of rate of scanning is constant (i.e. scan the time of a frame constant situation), leave for each The threshold value detecting time of pixel constantly shortens, and causes pixel can not complete threshold value detecting at short notice, Compensation effect is deteriorated therewith.

Summary of the invention

In view of this, the present invention provides a kind of organic electroluminescence display panel and driving method thereof, existing to solve The problems such as dark-state is dark, compensation effect is poor present in technology, organic of present invention offer simultaneously are provided Light display floater and the suitable high-resolution of driving method thereof and narrow frame design.

The invention provides a kind of organic electroluminescence display panel, it is characterised in that including: multirow pixel list First and multiple drive circuit units, described pixel cell of often going includes multiple image element circuit;Described pixel electricity Road include the first initialization module, the second initialization module, threshold value compensation module, Data write. module, Light emitting control module, memory module, driving transistor and Organic Light Emitting Diode, described first initializes Module is connected with the grid of described driving transistor, for carrying out the grid of described driving transistor initially Changing, described second initialization module is connected with the anode of described Organic Light Emitting Diode, for having described The anode of machine light emitting diode initializes, described threshold value compensation module and the source of described driving transistor Pole connects, for described driving transistor being carried out valve value compensation, and described Data write. module and described threshold Value compensating module connect, for described image element circuit provide voltage data signal, described memory module with Described Data write. module connects, for storing the voltage data signal that described Data write. module provides, Described light emitting control module is connected with the source electrode of described driving transistor, is used for controlling described organic light emission two The luminescence of pole pipe;Described drive circuit unit includes the first drive circuit and the second drive circuit, wherein, Described first drive circuit include luminous signal output circuit and first scanning signal output apparatus, described Optical signal output circuit and described first scanning signal output apparatus electrically connect the described picture of more than two row simultaneously Element circuit;Described second drive circuit include plural second scanning signal output apparatus, described two Individual the second above scanning signal output apparatus respectively with described two row more than described image element circuit one a pair Should electrically connect.

Present invention also offers a kind of driving method driving above-mentioned organic electroluminescence display panel, its feature exists In, drive arbitrary described image element circuit all to include initialization, valve value compensation, data write and luminescence process, Described first scanning signal output apparatus and described second scanning signal output apparatus are at described initialization, threshold Value complement repay during equal overlapping without in sequential: sweep described in described initialization, valve value compensation process first Retouch signal output apparatus and export the first level signal, described second scanning signal output apparatus output the second electricity Ordinary mail number, described first level signal and described second electrical level signal inversion.

Compared with prior art, the present invention at least has one of following prominent advantage:

Organic electroluminescence display panel that the present invention provides and driving method thereof can solve that dark-state is dark, compensate The problem such as not exclusively, the present invention provides simultaneously organic electroluminescence display panel and the suitable high score of driving method thereof Distinguish and narrow frame design.

Accompanying drawing explanation

Figure 1A is a kind of typical OLED pixel circuit in prior art;

Figure 1B is the corresponding working timing figure of image element circuit shown in Figure 1A;

Fig. 2 A is a kind of organic electroluminescence display panel that the embodiment of the present invention provides;

Fig. 2 B is a kind of image element circuit figure that the embodiment of the present invention provides

Fig. 2 C is a kind of image element circuit concrete structure figure that the embodiment of the present invention provides;

Fig. 2 D is a kind of driver' s timing figure for image element circuit shown in Fig. 2 B that the embodiment of the present invention provides;

Fig. 3 is another image element circuit figure that the embodiment of the present invention provides.

Detailed description of the invention

Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, below in conjunction with attached The present invention will be further described with embodiment for figure.

It should be noted that elaborate detail in the following description so that fully understanding the present invention. But the present invention can be different from alternate manner described here implement with multiple, those skilled in the art Similar popularization can done in the case of intension of the present invention.Therefore the present invention is not by following public The restriction of detailed description of the invention.

Refer to Fig. 2 A, Fig. 2 A is a kind of organic electroluminescence display panel that the embodiment of the present invention provides.Have Machine light emitting display panel 100 includes multirow pixel cell 105 and multiple drive circuit unit 109, often goes picture Element unit 105 includes multiple image element circuit 107.Fig. 2 B is the structural representation of image element circuit 107, as Shown in Fig. 2 B, image element circuit 107 include first initialization module the 1071, second initialization module 1072, Threshold value compensation module 1073, Data write. module 1074, light emitting control module 1075, memory module 1076, Drive transistor DT and Organic Light Emitting Diode EL.Wherein, the first initialization module 1071 and driving crystalline substance The grid of body pipe DT connects, and for initializing the grid driving transistor DT, second initializes Module 1072 is connected with the anode of Organic Light Emitting Diode EL, for Organic Light Emitting Diode EL's Anode initializes, and threshold value compensation module 1073 is connected, for right with the source electrode driving transistor DT Driving transistor DT to carry out valve value compensation, Data write. module 1074 is connected with threshold value compensation module 1073, For providing voltage data signal, memory module 1076 and Data write. module 1074 to image element circuit 107 Connect, for storing the voltage data signal that Data write. module 1074 provides, light emitting control module 1075 It is connected with the source electrode driving transistor DT, for controlling the luminescence of Organic Light Emitting Diode EL.

With continued reference to Fig. 2 A, the drive circuit unit 109 of organic electroluminescence display panel 100 includes that first drives Galvanic electricity road 111 and the second drive circuit 112, wherein, the first drive circuit 111 includes scan signal Output circuit 1111 and luminous signal output circuit 1112, the second drive circuit 112 includes that two second are swept Retouch signal output apparatus 1121,1122.In the embodiment shown in Fig. 2 A, arbitrary drive circuit unit The first scanning signal output apparatus 1111 in 109 electrically connects two row image element circuits 107, luminous signal simultaneously Output circuit 1112 electrically connects two row image element circuits 107, two second scanning signal output apparatus simultaneously 1121,1122 electrically connect with two row image element circuit 107 one_to_one corresponding respectively.

It should be noted that multirow pixel cell 105 is positioned at organic light emitting display face in the embodiment of the present invention The viewing area 101 of plate 100, multiple drive circuit units are positioned at the non-display of organic electroluminescence display panel 100 District 103.

In organic electroluminescence display panel shown in Fig. 2 A, drive circuit unit 109 has electrically connected two row pictures simultaneously Element unit 105, i.e. this two row pixel cell 105 in each image element circuit all with this drive circuit unit 109 electrical connections, the various driving signals sent from drive circuit unit 109 with reception, finally realize pixel The luminescence of circuit and display.It is known that in the prior art, any one drive circuit unit is general Electrical connection corresponding with one-row pixels unit, say, that the pixel cell of this row is mainly by corresponding Drive circuit unit provides and drives signal, so, for organic electroluminescence display panel, has how many row Pixel cell, it is necessary to how many drive circuit units are set at non-display area, are unfavorable for narrow frame.And By using the design in Fig. 2 A illustrated embodiment, arbitrary drive circuit unit 109 electrically connects two the most simultaneously The pixel cell 105 that row is above, can save the quantity of drive circuit unit, be more beneficial for narrow frame.

It should be noted that for Fig. 2 A illustrated embodiment, simply schematically depict drive circuit list Unit 109 electrically connects two row pixel cells 105 simultaneously, but not limits this, it is also possible to be drive circuit Unit 109 electrically connects three row pixel cell 105: the first scanning signal output apparatus simultaneously and luminous signal is defeated Go out circuit and electrically connect three row image element circuits simultaneously;Second drive circuit includes three second scanning signal outputs Circuit, three second scanning signal output apparatus electrically connect with three row image element circuit one_to_one corresponding respectively;Also More multirow pixel cell can be electrically connected by a drive circuit unit simultaneously, enumerate the most one by one at this.

Refer to Fig. 2 C, the first initialization module 1071 in the image element circuit 107 that the embodiment of the present invention provides Including the first transistor M1, the second initialization module 1072 includes transistor seconds M2, valve value compensation mould Block 1073 includes that third transistor M3, Data write. module 1074 include the 4th transistor M4, luminous Control module 1075 includes that the 5th transistor M5, memory module 1076 include the first electric capacity C1 and second Electric capacity C2.The grid of the first transistor M1 and the first scanning signal output apparatus 1111 connect, the first crystalline substance First pole of body pipe M1 is connected with reference voltage line 1131, second pole of the first transistor M1 is with organic The anode of light emitting diode EL connects, the grid of transistor seconds M2 and the first scanning signal output apparatus 1111 connections, first pole of transistor seconds M2 are connected with the second pole driving transistor DT, the second crystalline substance Second pole of body pipe M2 is connected with the grid driving transistor DT, the grid of third transistor M3 and the Scan signal output circuit 1111 connects, the first pole of third transistor M3 with drive transistor DT The first pole connect, the second pole of third transistor M3 is connected with second pole of the 4th transistor M4, the The grid of four transistor M4 and the second scanning signal output apparatus 1112 connect, the 4th transistor M4 First pole is connected with data wire 1132, the grid of the 5th transistor M5 and luminous signal output circuit 1112 Connect, first pole of the 5th transistor M5 is connected with the first power voltage terminal PVDD, the 5th transistor Second pole of M5 is connected with the first pole driving transistor DT, first end and the 5th of the first electric capacity C1 First pole connection, second end of the first electric capacity C1 and second pole of third transistor M3 of transistor M5 Connecting, first end of the second electric capacity C2 is connected with the second pole of third transistor M3, the second electric capacity C2 The second end is connected with the grid driving transistor DT, the negative electrode of Organic Light Emitting Diode EL and second electric Source voltage end PVEE connects, and the first power supply voltage signal of the first power voltage terminal PVDD transmission is higher than The second source voltage signal of second source voltage end PVEE transmission.For convenience of describing, the application is by the The first named PVDD of power supply voltage signal of one power voltage terminal PVDD transmission, second source voltage The named PVEE of second source voltage signal of end PVEE transmission.

Therefore combine Fig. 2 A and 2C to understand, the first scanning signal output apparatus 1111 and luminous signal output Circuit 1112 connects two row pixel cells 105, the second scanning signal output apparatus 1121,1122 respectively with This two row pixel cell 105 one_to_one corresponding electrically connects.Specifically, the first scanning signal output apparatus 1111 At the beginning of the first initialization module 1071, second in this all image element circuit 107 of two row pixel cell 105 Beginningization module 1072, the control end of threshold value compensation module 1073 connect, luminous signal output circuit 1112 It is connected with the light emitting control module 1075 in this all image element circuit 107 of two row pixel cell 105, second The data of all image element circuits of a line 107 in scanning signal output apparatus 1121 and this two row pixel cell The control end of writing module 1074 connects, second scanning signal output apparatus 1122 and this two row pixel list The control end of the Data write. module 1074 of all image element circuits of another row 107 in unit connects.

Fig. 2 D is a kind of driver' s timing figure for image element circuit shown in Fig. 2 B that the embodiment of the present invention provides. As shown in Figure 2 D, the work process of the image element circuit that the embodiment of the present invention provides mainly includes initial runtime S1, threshold value detecting moment S2, the first data write moment S31, the first data write moment S32, send out Light moment S4.

It should be noted that for Fig. 2 C illustrated embodiment, the type of the whole transistors in circuit For p-type, but the type of transistor does not constitute the restriction to the embodiment of the present invention, it is also possible to all transistors Type be N-type.As a same reason, the first level signal arrived described below and second electrical level signal regard tool Depending on the transistor types of body.Such as, it is PMOS when all transistors in image element circuit 107 Time, the first level signal be high level signal, second electrical level signal be low level signal;Work as image element circuit When all transistors in 107 are NMOS tube, the first level signal is low level signal, the second electricity Ordinary mail number is high level signal.Next as a example by the transistor in image element circuit 107 is PMOS The specific works process of image element circuit shown in explanatory diagram 2B.

Specifically, in the S1 moment, the first scanning signal output apparatus 1111, luminous signal output circuit 1112 transmission the first level signals, the second scanning signal output apparatus 1121 and 1122 transmits second electrical level Signal.In this moment, the first transistor M1, transistor seconds M2, third transistor M3, the 5th Transistor M5 turns on, and reference voltage line 1131 transmits reference voltage VrefTo Organic Light Emitting Diode EL Anode and drive the grid of transistor DT, to the anode of Organic Light Emitting Diode EL with drive transistor The grid of DT initializes.Owing to now carving the anode voltage of Organic Light Emitting Diode EL for reference to electricity Pressure Vref(reference voltage VrefMuch smaller than the first supply voltage PVDD), therefore at this moment organic light emission Voltage difference between anode and the negative electrode of diode EL is not enough to drive Organic Light Emitting Diode EL to carry out sending out Light, is prevented effectively from the not dark problem of dark-state present in image element circuit.Meanwhile, the first supply voltage PVDD The 5th transistor M5 and third transistor M3 through turning on are transmitted to secondary nodal point N2.Therefore, at this In the moment, the current potential of primary nodal point N1 is Vref, the current potential of secondary nodal point N2 be PVDD.Because first Scanning signal output apparatus 1111 and luminous signal output circuit 1112 are simultaneously connected with two row image element circuits 107, therefore, all image element circuits at this two row pixel cell 105 of this moment all complete to drive transistor The grid of DT initializes and the anode of Organic Light Emitting Diode EL initializes.

In the S2 moment, the first scanning signal output apparatus 1111 transmits the first level signal, the second scanning Signal output apparatus 1121 and 1122, luminous signal output circuit 1112 transmit second electrical level signal.? This moment, the conducting of the first transistor M1, transistor seconds M2, third transistor M3, primary nodal point N1 still keeps the reference voltage V in a momentref;The trimorphism through conducting of the current potential of secondary nodal point N2 simultaneously Body pipe M3, driving transistor DT, the first transistor M1 transmission are extremely connected with reference voltage line 1131 Reference voltage end (not shown) is until the current potential of secondary nodal point N2 becomes Vref-VthTime drive crystal Pipe DT ends, and this moment stops, wherein VthFor driving the threshold voltage of transistor.Because the first scanning Signal output apparatus 1111 is simultaneously connected with two row image element circuits 107, therefore, in this two row pixel of this moment All image element circuits of unit 105 all complete to drive the threshold value detecting of transistor DT.Due in this moment, The current potential of primary nodal point N1 is provided reference voltage V continuously by reference voltage sourceref, therefore, drive The grid voltage of transistor DT keeps constant reference voltage signal V in this momentref, i.e. do not have existing There is problem unstable in threshold value reconnaissance phase drive transistor gate voltage in technology.

In the S31 moment, the second scanning signal output apparatus 1121 transmits the first level signal, the first scanning Signal output apparatus 1111, luminous signal output circuit 1112, second scan signal output apparatus 1122 and pass Defeated second electrical level signal.In this moment, the 4th transistor M4 conducting, data wire 1132 transmits data letter Number voltage VdataTo secondary nodal point N2, therefore, the current potential at this moment secondary nodal point N2 is VdataAnd deposit Storage is in the first electric capacity C1.Due to the coupling of the second electric capacity C2, primary nodal point N1 was by upper a period of time The V carvedrefBecome Vdata+Vth(Vref+(Vdata-(Vref-Vth))).Because at this moment, only second Scanning signal output apparatus 1121 transmits the first level signal, and second scans signal output apparatus 1122 Transmission second electrical level signal, so, the most only it is connected with the second scanning signal output apparatus 1121 This row image element circuit complete the write of data voltage signal.

In the S32 moment, the second scanning signal output apparatus 1122 transmits the first level signal, the first scanning Signal output apparatus 1111, luminous signal output circuit 1112, second scan signal output apparatus 1121 and pass Defeated second electrical level signal.It is different from S31 moment, at this moment, the only second scanning signal output Circuit 1122 transmits the first level signal, and the second scanning signal output apparatus 1121 transmits second electrical level Signal, so, this row pixel electricity being the most only connected with the second scanning signal output apparatus 1122 Road completes the write of data voltage signal.

In the S4 moment, luminous signal output circuit 1112 transmits the first level signal, scan signal Output circuit 1111, second scans signal output apparatus 1121 and 1122 and transmits second electrical level signal.? In this moment, the 5th transistor M5 conducting, the first supply voltage PVDD transmission is to driving transistor DT Source electrode, this moment drive transistor Vgs(grid and the voltage difference of source electrode) is Vdata+Vth-PVDD, Glow current I=k (the V of Organic Light Emitting Diodegs-Vth)2=k (Vdata-PVDD)2.As can be seen here, You Jifa The glow current of optical diode and driving transistor VthThreshold voltage unrelated, i.e. the embodiment of the present invention provide Organic electroluminescence display panel achieve the effect of valve value compensation.

As the above analysis, due to the first scanning signal output apparatus 1111 and luminous signal output circuit 1112 are simultaneously connected with two row pixel cells 105, therefore, at S1 moment and the first scanning signal output apparatus 1111 and this all pixel cell of two row 105 of being simultaneously connected with of luminous signal output circuit 1112 complete simultaneously Initialization procedure, at S2 moment and the first scanning signal output apparatus 1111 and luminous signal output circuit 1112 these all pixel cells of two row 105 being simultaneously connected with complete threshold value detecting process simultaneously.This two row institute There is pixel cell 105 to complete to initialize and after threshold value detecting process, in S31 moment wherein a line simultaneously The advanced row data writing process of pixel cell 105, then enters at another row pixel cell 105 of S32 moment Row data writing process.After this all pixel cell of two row is respectively completed data writing process, when S4 Carve this all pixel cell of two row and perform luminescence simultaneously.

Therefore, at the beginning of in the organic electroluminescence display panel that the embodiment of the present invention provides, any pixel circuit all includes Beginningization, valve value compensation, data write and luminescence process, and the first scanning signal output apparatus and second is swept Retouch signal output apparatus initializing, during valve value compensation all without overlapping in sequential: initialization, Valve value compensation process first scans signal output apparatus and exports the first level signal, the second scanning signal output Circuit output second electrical level signal, the first level signal and second electrical level signal inversion.Just because of first sweeps Retouch signal output apparatus and the second scanning signal output apparatus initializing, during valve value compensation all without time Overlapping in sequence, the while of just so that scan the two row pixel cells that signal output apparatus is connected with first Carry out initializing and valve value compensation process, and carry out initializing and threshold value at this two row pixel cell simultaneously After compensation, then carry out data write successively.

To sum up analyzing and understand, the organic electroluminescence display panel that the embodiment of the present invention provides is possible not only to improve now There are the problems such as not dark, the compensation effect difference of dark-state in technology, the organic light emission that the embodiment of the present invention provides simultaneously Display floater compensation time of each pixel in high-resolution shows will not reduce, and fully ensures that each pixel Compensation effect, and the organic electroluminescence display panel that provides of the present invention can to reduce scan signal defeated Go out the space layout design of circuit and the quantity of luminous signal output circuit, beneficially panel.

Fig. 3 is another image element circuit figure that the embodiment of the present invention provides, and the driver' s timing shown in Fig. 2 D Image element circuit shown in equally applicable Fig. 3.The most superfluous at this with the something in common of image element circuit figure shown in Fig. 2 C Stating, be in place of difference, first pole of transistor seconds M2 is connected with reference voltage line 1131.So Design is advantageous in that, when driving transistor DT being carried out grid and initializing, and reference voltage line 1131 Can be by reference voltage VrefDirectly by the transistor seconds M2 transmission of conducting to driving transistor DT's Grid, without the first transistor M1 also passing through conducting in the image element circuit as shown in Fig. 2 C. In the image element circuit shown in Fig. 3, the reference voltage line being connected with transistor seconds M2 the first pole can not It is same as the reference voltage line being connected with the first transistor M1 the first pole, is i.e. used for driving transistor gate initial The reference voltage line changed is different, so with for the initialized reference voltage line of Organic Light Emitting Diode anode Design is advantageous in that, can according to actual needs can be to driving the grid of transistor and organic light emission two The anode of pole pipe provides different initialization voltage.

The organic electroluminescence display panel that the present invention provides can avoid the problems such as not dark, the compensation effect difference of dark-state, Organic electroluminescence display panel compensation of each pixel in high-resolution shows that the embodiment of the present invention provides simultaneously Time will not reduce, and fully ensures that the compensation effect of each pixel, and the organic light emission that the present invention provides Display floater can reduce the first scanning signal output apparatus and the quantity of luminous signal output circuit, is beneficial to The space layout design of panel.

Above content is to combine concrete preferred implementation further description made for the present invention, It cannot be assumed that the present invention be embodied as be confined to these explanations.For the technical field of the invention For those of ordinary skill, without departing from the inventive concept of the premise, it is also possible to make and some simply pushing away Drill or replace, all should be considered as belonging to protection scope of the present invention.

Claims (9)

1. an organic electroluminescence display panel, it is characterised in that include multirow pixel cell and multiple driving Circuit unit;
Described pixel cell of often going includes that multiple image element circuit, described image element circuit include the first initialization mould Block, the second initialization module, threshold value compensation module, Data write. module, light emitting control module, storage Module, driving transistor and Organic Light Emitting Diode, described first initialization module and described driving crystal The grid of pipe connects, and for initializing the grid of described driving transistor, described second initializes Module is connected with the anode of described Organic Light Emitting Diode, for the anode to described Organic Light Emitting Diode Initializing, described threshold value compensation module is connected with the source electrode of described driving transistor, for described Driving transistor to carry out valve value compensation, described Data write. module is connected with described threshold value compensation module, uses In providing voltage data signal to described image element circuit, described memory module is with described Data write. module even Connect, for store described Data write. module provide voltage data signal, described light emitting control module with The source electrode of described driving transistor connects, for controlling the luminescence of described Organic Light Emitting Diode;
Described drive circuit unit includes the first drive circuit and the second drive circuit, wherein, described first Drive circuit includes the first scanning signal output apparatus and luminous signal output circuit, described first scanning letter Number output circuit and luminous signal output circuit electrically connect the described image element circuit of more than two row simultaneously;Described Second drive circuit includes plural second scanning signal output apparatus, more than said two second Scanning signal output apparatus electrically connects with described image element circuit one_to_one corresponding more than described two row respectively.
2. organic electroluminescence display panel as claimed in claim 1, it is characterised in that described first initial Changing module and include that the first transistor, described second initialization module include transistor seconds, described threshold value is mended Repay module and include that third transistor, described Data write. module include the 4th transistor, described light emitting control Module includes that the 5th transistor, described memory module include the first electric capacity and the second electric capacity;
The grid of described the first transistor is connected with described first scanning signal output apparatus, described first crystalline substance First pole of body pipe is connected with reference voltage line, the second pole of described the first transistor and described organic light emission The anode of diode connects, and the grid of described transistor seconds is with described first scanning signal output apparatus even Connect, the first pole of described transistor seconds is connected with the second pole of described driving transistor, described second crystalline substance Second pole of body pipe is connected with the grid of described driving transistor, and the grid of described third transistor is with described First scanning signal output apparatus connects, the first pole and the described driving transistor of described third transistor First pole connects, the second pole of described third transistor is connected with the second pole of described 4th transistor, institute State the grid of the 4th transistor be connected with described second scanning signal output apparatus, described 4th transistor First pole is connected with data wire, the grid of described 5th transistor is connected with described luminous signal output circuit, First pole of described 5th transistor is connected with the first power voltage terminal, the second pole of described 5th transistor It is connected with the first pole of described driving transistor, the first end of described first electric capacity and described 5th transistor First pole connect, the second end of described first electric capacity be connected with the second pole of described third transistor, institute Second pole of the first end and described third transistor of stating the second electric capacity is connected, the second of described second electric capacity End is connected with the grid of described driving transistor, the negative electrode of described Organic Light Emitting Diode and second source electricity Press bond, the first power supply voltage signal of described first power voltage terminal transmission is higher than described second source The second source voltage signal of voltage end transmission.
3. organic electroluminescence display panel as claimed in claim 1, it is characterised in that described first initial Changing module and include that the first transistor, described second initialization module include transistor seconds, described threshold value is mended Repaying and include third transistor, described Data write. module includes the 4th transistor, described light emitting control module Including the 5th transistor, described memory module includes the first electric capacity and the second electric capacity;
The grid of described the first transistor is connected with described first scanning signal output apparatus, described first crystalline substance First pole of body pipe is connected with reference voltage line, the second pole of described the first transistor and described organic light emission The anode of diode connects, and the grid of described transistor seconds is with described first scanning signal output apparatus even Connect, the first pole of described transistor seconds is connected with described reference voltage line, the of described transistor seconds Two poles are connected with the grid of described driving transistor, the grid of described third transistor and described first scanning Signal output apparatus connects, the first pole of described third transistor connects with the first pole of described driving transistor Connect, the second pole of described third transistor is connected with the second pole of described 4th transistor, and the described 4th is brilliant The grid of body pipe is connected with described second scanning signal output apparatus, the first pole of described 4th transistor and Data wire connects, and the grid of described 5th transistor is connected with described luminous signal output circuit, described the First pole of five transistors is connected with the first supply voltage cabling, the second pole of described 5th transistor and institute State and drive the first pole of transistor to connect, the of the first end of described first electric capacity and described 5th transistor One pole connects, the second end of described first electric capacity is connected with the second pole of described third transistor, and described the First end of two electric capacity is connected with the second pole of described third transistor, the second end of described second electric capacity with The grid of described driving transistor connects, the negative electrode of described Organic Light Emitting Diode and second source voltage end Connecting, the first power supply voltage signal of described first supply voltage cabling transmission is higher than described second source electricity The second source voltage signal of pressure side transmission.
4. organic electroluminescence display panel as claimed in claim 2 or claim 3, it is characterised in that described first Transistor, transistor seconds, third transistor, the 4th transistor, the 5th transistor and driving transistor It is PMOS.
5. organic electroluminescence display panel as claimed in claim 2 or claim 3, it is characterised in that described first Transistor, transistor seconds, third transistor, the 4th transistor, the 5th transistor and driving transistor It is NMOS tube.
6. organic electroluminescence display panel as claimed in claim 1, it is characterised in that described first scanning Signal output apparatus and described luminous signal output circuit electrically connect image element circuit described in three row simultaneously;Described Second drive circuit includes three second scanning signal output apparatus, described three second scanning signal outputs Circuit electrically connects with image element circuit one_to_one corresponding described in three row respectively.
7. organic electroluminescence display panel as claimed in claim 1, it is characterised in that the plurality of driving Circuit unit is positioned at the non-display area of described organic electroluminescence display panel.
8. for a driving method for organic electroluminescence display panel as claimed in claim 1, its feature It is, drives arbitrary described image element circuit all to include initialization, valve value compensation, data write and luminous mistake Journey, described first scanning signal output apparatus and described second scanning signal output apparatus described initialization, All without overlapping in sequential in valve value compensation: in the first scanning described in described initialization, valve value compensation process Signal output apparatus exports the first level signal, described second scanning signal output apparatus output second electrical level Signal, described first level signal and described second electrical level signal inversion.
9. driving method as claimed in claim 8, it is characterised in that described pixel lists more than two row After unit carries out described initialization and described valve value compensation simultaneously, then carry out described data write successively.
CN201610623315.0A 2016-08-01 2016-08-01 Organic light-emitting display panel and driving method thereof CN106023900A (en)

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CN107358917B (en) * 2017-08-21 2020-04-28 上海天马微电子有限公司 Pixel circuit, driving method thereof, display panel and display device
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CN107358917A (en) * 2017-08-21 2017-11-17 上海天马微电子有限公司 A kind of image element circuit, its driving method, display panel and display device
CN107633814B (en) * 2017-09-21 2019-06-04 信利(惠州)智能显示有限公司 Display panel and display device
CN107633814A (en) * 2017-09-21 2018-01-26 信利(惠州)智能显示有限公司 Display panel and display device
CN109461407A (en) * 2018-12-26 2019-03-12 上海天马微电子有限公司 A kind of organic light emitting display panel and organic light-emitting display device
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