CN107492345A - Pixel-driving circuit and organic light emitting diode display - Google Patents

Pixel-driving circuit and organic light emitting diode display Download PDF

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Publication number
CN107492345A
CN107492345A CN201710754066.3A CN201710754066A CN107492345A CN 107492345 A CN107492345 A CN 107492345A CN 201710754066 A CN201710754066 A CN 201710754066A CN 107492345 A CN107492345 A CN 107492345A
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China
Prior art keywords
film transistor
tft
thin film
scanning signal
pixel
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CN201710754066.3A
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Chinese (zh)
Inventor
陈小龙
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深圳市华星光电半导体显示技术有限公司
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Priority to CN201710754066.3A priority Critical patent/CN107492345A/en
Publication of CN107492345A publication Critical patent/CN107492345A/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]
    • 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

Abstract

The invention provides a kind of pixel-driving circuit and with the pixel-driving circuit organic light emitting diode display.The pixel-driving circuit carries out effective compensation using the pixel-driving circuit of 6T1C dot structures to the threshold voltage that the thin film transistor (TFT) of organic light-emitting diode is driven in pixel, it is unrelated with the threshold voltage of thin film transistor (TFT) to flow through the electric current of Organic Light Emitting Diode, bad phenomenon is shown so as to eliminate the picture because of caused by the threshold voltage shift of thin film transistor (TFT).

Description

Pixel-driving circuit and organic light emitting diode display

Technical field

The invention belongs to technical field of organic electroluminescence, specifically, is related to a kind of pixel-driving circuit and organic hair Optical diode display.

Background technology

In recent years, Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display turns into state Inside and outside very popular emerging flat-panel screens product, because when OLED display has self-luminous, wide viewing angle, short reaction Between, high-luminous-efficiency, wide colour gamut, low-work voltage, minimal thickness, the display that large scale and deflection can be made and processing procedure it is simple Etc. characteristic, and it also has the potentiality of low cost.

In OLED display, generally using thin film transistor (TFT) (TFT) collocation electric capacity storage signal, to control, OLED's is bright Spend GTG performance.In order to reach the purpose for determining electric current driving, each pixel at least needs two TFT and storage capacitors to carry out structure Into i.e. 2T1C patterns.Fig. 1 is the circuit diagram of the pixel-driving circuit of existing OLED display.Reference picture 1, existing OLED The pixel-driving circuit of display includes two thin film transistor (TFT)s (TFT) and a capacitor, specifically, including a switch TFTT2 and TFT T1, driving storage Cst.OLED driving current is by driving TFTT2 controls, its electric current Size is:IOLED=k (Vgs-Vth)2, wherein, k is the driving TFT T2 intrinsic conduction factor, by driving TFTT2 self characters to determine It is fixed, VthTo drive TFT T2 threshold voltage, VgsTo drive the voltage between TFT T2 grid and source electrode.Due to for a long time Operation, driving TFT T2 threshold voltage VthIt can drift about, therefore OLED drive current variations can be caused, so that OLED display occurs showing quality that is bad, and then influenceing display picture.

The content of the invention

In order to solve above-mentioned problem of the prior art, it is an object of the invention to provide one kind can eliminate organic light emission two The driving current of pole pipe is shown by the pixel-driving circuit and Organic Light Emitting Diode that the threshold voltage of driving thin film transistor (TFT) influences Show device.

According to an aspect of the present invention, there is provided a kind of pixel-driving circuit, it is characterised in that including:Reseting module, threshold Threshold voltage compensating module, luminous drive module and Organic Light Emitting Diode;The reseting module be used for reseting stage according to The first scanning signal in high potential, the second scanning signal in high potential and the 3rd scanning signal in low potential Current potential reset is carried out to the luminous drive module;The threshold voltage compensation module be used for the threshold voltage compensation stage according to The first scanning signal in low potential, the second scanning signal in high potential and the 3rd scanning signal in high potential Threshold voltage compensation is carried out to the luminous drive module;The luminous drive module is used in the luminous driving stage according to being in First scanning signal of high potential, the second scanning signal in low potential and the 3rd scanning signal in low potential are to institute State Organic Light Emitting Diode to be driven, so that the organic light-emitting diode;Wherein, the organic light-emitting diodes are driven The luminous electric current of pipe is unrelated with the threshold voltage of the luminous drive module.

Further, the reseting module includes:First film transistor, the second thin film transistor (TFT), the 3rd film crystal Pipe, the 4th thin film transistor (TFT), the 5th thin film transistor (TFT) and capacitor;The grid of the first film transistor is connected to first segment Point, and its source electrode is used to receive power cathode voltage, and its drain electrode is connected to the drain electrode of second thin film transistor (TFT);Described The grid of two thin film transistor (TFT)s is used to receive the first scanning signal, and its source electrode is connected to the moon of the Organic Light Emitting Diode Pole;The grid of 3rd thin film transistor (TFT) is used to receive the second scanning signal, and its source electrode is connected to the organic light emission two The anode of pole pipe simultaneously is used to receive positive source voltage, and its drain electrode is connected to the negative electrode of the Organic Light Emitting Diode;It is described The grid of 4th thin film transistor (TFT) is used to receive the second scanning signal, and its source electrode is connected to the leakage of second thin film transistor (TFT) Pole, and its drain electrode is connected to the first node;The grid of 5th thin film transistor (TFT) is used to receive the first scanning signal, and Its source electrode is connected to the source electrode of the 3rd thin film transistor (TFT), and its drain electrode is electrically connected at section point;The capacitor One end is electrically connected at first node, and its other end is electrically connected at section point.

Further, the threshold voltage compensation module includes:The first film transistor, the 3rd film crystal Pipe, the 4th thin film transistor (TFT), the 6th thin film transistor (TFT) and the capacitor;The grid of 6th thin film transistor (TFT) is used for The 3rd scanning signal is received, and its source electrode is used to receive data-signal, and its drain electrode is electrically connected at the section point.

Further, the luminous drive module includes:The first film transistor, second thin film transistor (TFT), 5th thin film transistor (TFT) and the capacitor.

Further, the first film transistor to the 6th thin film transistor (TFT) is low-temperature polysilicon film crystal Pipe, oxide semiconductor thin-film transistor or amorphous silicon film transistor.

Further, the first film transistor to the 6th thin film transistor (TFT) is nmos pass transistor.

According to another aspect of the present invention, a kind of pixel-driving circuit is additionally provided, it includes:First film transistor, Second thin film transistor (TFT), the 3rd thin film transistor (TFT), the 4th thin film transistor (TFT), the 5th thin film transistor (TFT), the 6th thin film transistor (TFT), electricity Container and Organic Light Emitting Diode;The grid of the first film transistor is connected to first node, and its source electrode is used to receive Power cathode voltage, and its drain electrode is connected to the drain electrode of second thin film transistor (TFT);The grid of second thin film transistor (TFT) For receiving the first scanning signal, and its source electrode is connected to the negative electrode of the Organic Light Emitting Diode;3rd film crystal The grid of pipe is used to receive the second scanning signal, and its source electrode is connected to the anode of the Organic Light Emitting Diode and for receiving Positive source voltage, and its drain electrode is connected to the negative electrode of the Organic Light Emitting Diode;The grid of 4th thin film transistor (TFT) For receiving the second scanning signal, and its source electrode is connected to the drain electrode of second thin film transistor (TFT), and its drain electrode is connected to institute State first node;The grid of 5th thin film transistor (TFT) is used to receive the first scanning signal, and its source electrode is connected to described the The source electrode of three thin film transistor (TFT)s, and its drain electrode is electrically connected at section point;The grid of 6th thin film transistor (TFT) is used to connect The 3rd scanning signal is received, and its source electrode is used to receive data-signal, and its drain electrode is electrically connected at the section point;The electricity One end of container is electrically connected at first node, and its other end is electrically connected at section point.

Further, the first film transistor to the 6th thin film transistor (TFT) is nmos pass transistor.

Further, the pixel-driving circuit, which performs, resets operation, threshold voltage compensation operation and luminous driving behaviour Make;When the pixel-driving circuit, which performs, resets operation, first scanning signal and second scanning signal are high electricity Position, the 3rd scanning signal is low potential;When the pixel-driving circuit performs threshold voltage compensation operation, described first Scanning signal is low potential, and the 3rd scanning signal and second scanning signal are high potential;When pixel driver electricity When road performs luminous driving operation, first scanning signal is high potential, the 3rd scanning signal and second scanning Signal is low potential.

According to another aspect of the invention, a kind of organic light emitting diode display is provided again, and it includes above-mentioned picture Plain drive circuit.

Beneficial effects of the present invention:The present invention is organic to being driven in pixel using the pixel-driving circuit of 6T1C dot structures The threshold voltage of the thin film transistor (TFT) of light emitting diode carries out effective compensation, and the electric current for flowing through Organic Light Emitting Diode is thin with this The threshold voltage of film transistor is unrelated, is shown not so as to eliminate the picture because of caused by the threshold voltage shift of the thin film transistor (TFT) Good phenomenon.

Brief description of the drawings

The following description carried out in conjunction with the accompanying drawings, above and other aspect, feature and the advantage of embodiments of the invention It will become clearer, in accompanying drawing:

Fig. 1 is the circuit diagram of the pixel-driving circuit of existing OLED display;

Fig. 2 is the Organization Chart of organic light emitting diode display according to an embodiment of the invention;

Fig. 3 is the equivalent circuit diagram of the dot structure of organic light emitting diode display according to an embodiment of the invention;

Fig. 4 is the timing diagram of each scanning signal according to an embodiment of the invention;

Fig. 5 A to Fig. 5 C are the process charts of pixel-driving circuit according to an embodiment of the invention.

Embodiment

Hereinafter, with reference to the accompanying drawings to embodiments of the invention are described in detail.However, it is possible to come in many different forms real Apply the present invention, and the specific embodiment of the invention that should not be construed as limited to illustrate here.Conversely, there is provided these implementations Example is in order to explain the principle and its practical application of the present invention, so that others skilled in the art are it will be appreciated that the present invention Various embodiments and be suitable for the various modifications of specific intended application.

In the accompanying drawings, in order to understand device, layer and the thickness in region are exaggerated.Identical label is in entire disclosure and attached Identical component is represented in figure.

Fig. 2 is the Organization Chart of organic light emitting diode display according to an embodiment of the invention.

Reference picture 2, organic light emitting diode display according to an embodiment of the invention include:Display panel 100, scanning Driver 200 and data driver 300.It should be noted that according to the present invention be strength organic light-emitting diode display Device can also include other suitable devices, such as control the time schedule controller of scanner driver 200 and data driver 300 with And the supply voltage generator of positive source voltage and power cathode voltage is provided etc..

Specifically, display panel 100 includes:Multiple pixel PX, N bar scan line G of array arrangement1To GN, M data lines D1To DM.Scanner driver 200 is connected to scan line G1To GN, and drive scan line G1To GN.Data driver 300 is connected to number According to line D1To DM, and driving data line D1To DM

Scanner driver 200 can provide one or more scanning signal to each pixel PX, will describe afterwards.Number Data-signal can be provided to each pixel PX according to driver 300, will also described afterwards.

Each pixel PX includes pixel-driving circuit.Below will be to pixel-driving circuit according to an embodiment of the invention (i.e. pixel PX dot structure) is described in detail.

Fig. 3 is the equivalent circuit diagram of the dot structure of organic light emitting diode display according to an embodiment of the invention.

Reference picture 3, each pixel PX of organic light emitting diode display according to an embodiment of the invention have 6T1C dot structures, the 6T1C dot structures include Organic Light Emitting Diode OLED, first film transistor T1, the second film Transistor T2, the 3rd thin film transistor (TFT) T3, the 4th thin film transistor (TFT) T4, the 5th thin film transistor (TFT) T5, the 6th thin film transistor (TFT) T6, Capacitor C.

First film transistor T1 grid is electrically connected at first node g, and its source electrode is used to receive power cathode electricity OVSS (it is generally provided by supply voltage generator (not shown)) is pressed, and its drain electrode is connected to the second thin film transistor (TFT) T2 leakage Pole.

Second thin film transistor (TFT) T2 grid is used for the first scanning signal Scan1 of reception, and (it is carried by scanner driver 200 For), and its source electrode is connected to Organic Light Emitting Diode OLED negative electrode.

3rd thin film transistor (TFT) T3 grid is used for the first scanning signal Scan2 of reception, and (it is carried by scanner driver 200 For), and its source electrode be connected to Organic Light Emitting Diode OLED anode and for receive positive source voltage OVDD (its generally by Supply voltage generator (not shown) provides), and its drain electrode is connected to Organic Light Emitting Diode OLED negative electrode.

4th thin film transistor (TFT) T4 grid is used to receive the second scanning signal Scan2, and to be connected to second thin for its source electrode Film transistor T2 drain electrode, and its drain electrode is electrically connected at first node g.

5th thin film transistor (TFT) T5 grid is used to receive the first scanning signal Scan1, and to be connected to the 3rd thin for its source electrode Film transistor T3 source electrode, and its drain electrode is electrically connected at section point n.

6th thin film transistor (TFT) T6 grid is used for the 3rd scanning signal Scan3 of reception, and (it is carried by scanner driver 200 For), and its source electrode is used to receive data-signal Vdata, and its drain electrode is electrically connected at section point n.

Capacitor C one end is electrically connected at first node g, and its other end is electrically connected at section point n.

In addition, in this embodiment, it is preferred that, first film transistor T1 to the 6th thin film transistor (TFT) T6 can be for example Nmos pass transistor, but the present invention is not restricted to this.Further, first film transistor T1 is equal to the 6th thin film transistor (TFT) T6 It can be for example low-temperature polysilicon film transistor, amorphous silicon film transistor or oxide semiconductor thin-film transistor.

The operation principle of pixel-driving circuit according to an embodiment of the invention will be described in detail below.In this reality Apply in example, the pixel-driving circuit according to an embodiment of the invention execution reset operation for employing 6T1C dot structures is (i.e. multiple The position stage), threshold voltage compensation operation (i.e. threshold voltage compensation stage) and luminous driving operation (lighting the driving stage). Fig. 4 is the timing diagram of each scanning signal according to an embodiment of the invention.Fig. 5 A to Fig. 5 C are the pixel drivers according to the present invention The process chart of circuit.In Fig. 5 A to Fig. 5 C, the fork "×" symbol on thin film transistor (TFT) represents that the thin film transistor (TFT) is in Cut-off state.

Reference picture 4, Fig. 5 A to Fig. 5 C in the lump, in reseting stage, the first scanning signal Scan1 and the second scanning signal are Scan2 is high potential, and the 3rd scanning signal is that Scan3 is low potential;Now, first film transistor T1 is to the 5th film crystal Pipe T5 is turned on, and the 6th thin film transistor (TFT) T6 ends.Because the second thin film transistor (TFT) T2 to the 4th thin film transistor (TFT) T4 is turned on, because This positive source voltage OVDD charges to first node g, makes first node g voltage Vg=OVDD;And due to the 5th thin Film transistor T5 is turned on, therefore positive source voltage OVDD charges to section point n, makes section point n voltage Vn= OVDD;Additionally due to first film transistor T1 to the 3rd thin film transistor (TFT) T3 is turned on, therefore first film transistor T1 source Pole tension Vs=OVDD, such Vg=Vn=Vs, so as to complete to reset first film transistor T1 current potential (or at the beginning of current potential Beginningization).

Further, formed again in reseting stage, first film transistor T1 to the 5th thin film transistor (TFT) T5 and capacitor C Position module (not shown), the function of the reseting module will be described below.

In the threshold voltage compensation stage, the first scanning signal Scan1 is low potential, and the second scanning signal is Scan2 and the Three scanning signals are that Scan3 is high potential;Now, first film transistor T1, the 3rd thin film transistor (TFT) T3, the 4th film crystal Pipe T4 and the 6th thin film transistor (TFT) T6 conductings, and remaining thin film transistor (TFT) ends.6th thin film transistor (TFT) T6 source electrode is received as The data-signal Vdata of high potential, now the voltage Vn=Vdata at section point n, first node g is via the 4th of conducting Thin film transistor (TFT) T4 and first film transistor T1 electric discharges, until between first node g and first film transistor T1 source electrode Pressure difference Vg-Vs=Vth untill, now Vs=OVSS, wherein Vth are first film transistor T1 threshold voltage.

Further, it is first film transistor T1, the 3rd thin film transistor (TFT) T3, the 4th thin in the threshold voltage compensation stage Film transistor T4 and the 6th thin film transistor (TFT) T6 capacitors C forms threshold voltage compensation module (not shown), and the threshold voltage is mended The function of repaying module will be described below.

In the luminous driving stage, the first scanning signal Scan1 is high potential, and the second scanning signal is that Scan2 and the 3rd is swept It is that Scan3 is low potential to retouch signal, now, first film transistor T1, the second thin film transistor (TFT) T2 and the 5th thin film transistor (TFT) T5 is turned on, and remaining thin film transistor (TFT) ends.Voltage Vg=at voltage Vn=OVDD at section point n, first node g Vth+OVSS+ Δ V, wherein, Δ V=OVDD-Vdata;The now pressure between first node g first film transistors T1 source electrode Poor Vg-Vs=Vth+OVSS+OVDD-Vdata-OVSS=OVDD-Vdata+Vth.

So, the electric current I for flowing through Organic Light Emitting Diode OLED is expressed as:

I=K (Vgs-Vth)2=K (OVDD-Vdata+Vth-Vth)2=K (OVDD-Vdata)2,

Wherein, K represents the first film transistor T1 intrinsic conduction factor, is determined by first film transistor T1 self characters It is fixed.

Δ V is also unrelated with first film transistor T1 threshold voltage vt h as from the foregoing, therefore, is flowing through organic light emission In diode OLED electric current I expression formula, electric current I is unrelated with first film transistor T1 threshold voltage vt h, so can be with Picture caused by eliminating first film transistor T1 threshold voltage vt h drifts shows bad phenomenon.

Further, in the luminous driving stage, by first film transistor T1, the second thin film transistor (TFT) T2, the 5th film Transistor T5 and capacitor C forms luminous drive module (not shown), and the function of luminous drive module will be described below.

From the course of work of pixel-driving circuit described above, the reseting module be used for reseting stage according to The first scanning signal Scan1 in high potential, the second scanning signal Scan2 in high potential and in low potential Three scanning signal Scan3 carry out current potential reset to the luminous drive module.

The threshold voltage compensation module is used to according to the first scanning in low potential be believed in the threshold voltage compensation stage Number Scan1, the second scanning signal Scan2 in high potential and the 3rd scanning signal Scan1 in high potential are to described Luminous drive module carries out threshold voltage compensation;

The luminous drive module be used for the luminous driving stage according to be in high potential the first scanning signal Scan1, The second scanning signal Scan2 in low potential and the 3rd scanning signal Scan3 in low potential are to the organic light emission Diode OELD is driven, so that the Organic Light Emitting Diode OELD lights.

Although the present invention has shown and described with reference to specific embodiment, it should be appreciated by those skilled in the art that: In the case where not departing from the spirit and scope of the present invention limited by claim and its equivalent, can carry out herein form and Various change in details.

Claims (10)

  1. A kind of 1. pixel-driving circuit, it is characterised in that including:Reseting module, threshold voltage compensation module, luminous drive module And Organic Light Emitting Diode;
    The reseting module is used to be swept according to the first scanning signal in high potential, second in high potential in reseting stage Retouch signal and the 3rd scanning signal in low potential carries out current potential reset to the luminous drive module;
    The threshold voltage compensation module is used in the threshold voltage compensation stage according to the first scanning signal in low potential, place Threshold value is carried out to the luminous drive module in the second scanning signal of high potential and the 3rd scanning signal in high potential Voltage compensation;
    The luminous drive module be used for the luminous driving stage according to be in the first scanning signal of high potential, in low potential The second scanning signal and the 3rd scanning signal in low potential the Organic Light Emitting Diode is driven so that institute State organic light-emitting diode;
    Wherein, drive the electric current of the organic light-emitting diode unrelated with the threshold voltage of the luminous drive module.
  2. 2. pixel-driving circuit according to claim 1, it is characterised in that the reseting module includes:The first film is brilliant Body pipe, the second thin film transistor (TFT), the 3rd thin film transistor (TFT), the 4th thin film transistor (TFT), the 5th thin film transistor (TFT) and capacitor;
    The grid of the first film transistor is connected to first node, and its source electrode is used to receive power cathode voltage, and its Drain electrode is connected to the drain electrode of second thin film transistor (TFT);
    The grid of second thin film transistor (TFT) is used to receive the first scanning signal, and its source electrode is connected to the organic light emission two The negative electrode of pole pipe;
    The grid of 3rd thin film transistor (TFT) is used to receive the second scanning signal, and its source electrode is connected to the organic light emission two The anode of pole pipe simultaneously is used to receive positive source voltage, and its drain electrode is connected to the negative electrode of the Organic Light Emitting Diode;
    The grid of 4th thin film transistor (TFT) is used to receive the second scanning signal, and its source electrode is connected to the second film crystalline substance The drain electrode of body pipe, and its drain electrode is connected to the first node;
    The grid of 5th thin film transistor (TFT) is used to receive the first scanning signal, and its source electrode is connected to the 3rd film crystalline substance The source electrode of body pipe, and its drain electrode is electrically connected at section point;
    One end of the capacitor is electrically connected at first node, and its other end is electrically connected at section point.
  3. 3. pixel-driving circuit according to claim 2, it is characterised in that the threshold voltage compensation module includes:Institute State first film transistor, the 3rd thin film transistor (TFT), the 4th thin film transistor (TFT), the 6th thin film transistor (TFT) and the electricity Container;
    The grid of 6th thin film transistor (TFT) is used to receive the 3rd scanning signal, and its source electrode is used to receive data-signal, and Its drain electrode is electrically connected at the section point.
  4. 4. pixel-driving circuit according to claim 3, it is characterised in that the luminous drive module includes:Described One thin film transistor (TFT), second thin film transistor (TFT), the 5th thin film transistor (TFT) and the capacitor.
  5. 5. pixel-driving circuit according to claim 4, it is characterised in that the first film transistor to the described 6th Thin film transistor (TFT) is low-temperature polysilicon film transistor, oxide semiconductor thin-film transistor or amorphous silicon film transistor.
  6. 6. the pixel-driving circuit according to claim 4 or 5, it is characterised in that the first film transistor is to described 6th thin film transistor (TFT) is nmos pass transistor.
  7. A kind of 7. pixel-driving circuit, it is characterised in that including:First film transistor, the second thin film transistor (TFT), the 3rd film Transistor, the 4th thin film transistor (TFT), the 5th thin film transistor (TFT), the 6th thin film transistor (TFT), capacitor and Organic Light Emitting Diode;
    The grid of the first film transistor is connected to first node, and its source electrode is used to receive power cathode voltage, and its Drain electrode is connected to the drain electrode of second thin film transistor (TFT);
    The grid of second thin film transistor (TFT) is used to receive the first scanning signal, and its source electrode is connected to the organic light emission two The negative electrode of pole pipe;
    The grid of 3rd thin film transistor (TFT) is used to receive the second scanning signal, and its source electrode is connected to the organic light emission two The anode of pole pipe simultaneously is used to receive positive source voltage, and its drain electrode is connected to the negative electrode of the Organic Light Emitting Diode;
    The grid of 4th thin film transistor (TFT) is used to receive the second scanning signal, and its source electrode is connected to the second film crystalline substance The drain electrode of body pipe, and its drain electrode is connected to the first node;
    The grid of 5th thin film transistor (TFT) is used to receive the first scanning signal, and its source electrode is connected to the 3rd film crystalline substance The source electrode of body pipe, and its drain electrode is electrically connected at section point;
    The grid of 6th thin film transistor (TFT) is used to receive the 3rd scanning signal, and its source electrode is used to receive data-signal, and Its drain electrode is electrically connected at the section point;
    One end of the capacitor is electrically connected at first node, and its other end is electrically connected at section point.
  8. 8. pixel-driving circuit according to claim 7, it is characterised in that the first film transistor to the described 6th Thin film transistor (TFT) is nmos pass transistor.
  9. 9. pixel-driving circuit according to claim 8, it is characterised in that the pixel-driving circuit, which performs, resets behaviour Make, threshold voltage compensation operation and luminous driving operate;
    When the pixel-driving circuit, which performs, resets operation, first scanning signal and second scanning signal are high electricity Position, the 3rd scanning signal is low potential;
    When the pixel-driving circuit performs threshold voltage compensation operation, first scanning signal is low potential, described the Three scanning signals and second scanning signal are high potential;
    When the pixel-driving circuit performs luminous driving operation, first scanning signal is high potential, and the described 3rd sweeps It is low potential to retouch signal and second scanning signal.
  10. 10. a kind of organic light emitting diode display, it is characterised in that driven including the pixel described in any one of claim 1 to 9 Dynamic circuit.
CN201710754066.3A 2017-08-29 2017-08-29 Pixel-driving circuit and organic light emitting diode display CN107492345A (en)

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Application publication date: 20171219