CN104485067A - OLED (Organic Light-Emitting Diode) pixel driving circuit - Google Patents
OLED (Organic Light-Emitting Diode) pixel driving circuit Download PDFInfo
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- CN104485067A CN104485067A CN201410733836.2A CN201410733836A CN104485067A CN 104485067 A CN104485067 A CN 104485067A CN 201410733836 A CN201410733836 A CN 201410733836A CN 104485067 A CN104485067 A CN 104485067A
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Abstract
The invention provides an OLED (Organic Light-Emitting Diode) pixel driving circuit. The pixel driving circuit comprises eight P (Positive) type transistors, three capacitors and six signal input lines, i.e. a first scanning signal line, a second scanning signal line, a third scanning signal line, a first luminescence control line, a second luminescence control line and a data signal line. According to the pixel driving circuit, as six input signals are controlled, not only is the threshold voltage of a driving tube compensated, but also stable current can be output; therefore the normal luminescence of an OLED is guaranteed.
Description
Technical field
The present invention relates to a kind of OLED pixel-driving circuit, particularly a kind of OLED pixel-driving circuit exporting band compensate function that can be stable.
Background technology
At present, organic electroluminescent LED (Organic Light-Emitting Diode, OLED) has the advantages such as autoluminescence, high brightness, wide viewing angle, low-power consumption, high-contrast, making be simple because of it, has become the new lover on current display circle and has emerged rapidly.But, traditional driving circuit is along with passage of time, the brightness meeting reduction gradually of OLED, thus do not reach expected effect, therefore, the present invention proposes a new OLED pixel-driving circuit, the threshold voltage of driving tube can not only be compensated, and the electric current of energy stable output, thus ensure the normal luminous of OLED.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, and a kind of OLED pixel-driving circuit is provided, the threshold voltage of driving tube can be compensated, stable output electric current, guarantee OLED normal luminous.
Create object for reaching foregoing invention, the present invention adopts following technical proposals:
A kind of OLED pixel-driving circuit, comprises:
Organic Light Emitting Diode: positive pole is connected with the source electrode of the 8th transistor, negative pole is connected with the first negative supply positive pole;
First positive supply: positive pole connects the drain electrode of the first transistor, minus earth;
First negative supply: the negative pole of positive pole connecting luminous diode, minus earth;
First reference voltage source: positive pole connects the drain electrode of the 6th transistor, minus earth;
First initial voltage source: positive pole connects the source electrode of third transistor and the source electrode of the 7th transistor, minus earth;
First scan signal line: connect the grid of transistor seconds and the grid of the 4th transistor;
Second scan signal line: connect the grid of the 6th transistor and the grid of the 5th transistor;
3rd scan signal line: the grid connecting the 7th transistor;
First light emitting control line: the grid connecting the 8th transistor;
Second light emitting control line: the grid connecting third transistor;
Data signal line: the source electrode connecting transistor seconds;
First electric capacity: be connected between the grid of the first transistor and the first positive supply positive pole, the first electric capacity is for ensureing the threshold voltage of the first transistor;
Second electric capacity: be connected between the grid of the first transistor and the drain electrode of transistor seconds, when there being data scanning, the second electric capacity will carry out discharge and recharge;
3rd electric capacity: be connected between the source electrode of the 6th transistor and the source electrode of the 4th transistor;
The first transistor: drain electrode is connected with the first positive supply positive pole, and source electrode is connected with the drain electrode of the 5th transistor, and grid is connected with the source electrode of the 5th transistor, controls to be supplied to Organic Light Emitting Diode electric current by power supply;
Transistor seconds: drain electrode is connected with the source electrode of the 6th transistor, and source electrode is connected with data signal line, and grid is connected with the first scan signal line, and the just conducting when the first sweep trace is input as low level;
Third transistor: drain electrode is connected with the source electrode of the 4th transistor, source electrode is connected with the first initial voltage source positive pole, grid is connected with the second light emitting control line, and the just conducting when the second light emitting control line is input as low level, conducting when transistor seconds is different with third transistor, a driving voltage higher than Organic Light Emitting Diode, a driving voltage lower than Organic Light Emitting Diode;
4th transistor: drain electrode is connected with Organic Light Emitting Diode positive pole, and source electrode is connected with the drain electrode of third transistor, and grid is connected with the first scan signal line, and the just conducting when the first scan signal line is input as low level;
5th transistor: drain electrode is connected with the first transistor source electrode, and source electrode is connected with the drain electrode of the 7th transistor, and grid is connected with the second scan signal line, and the just conducting when the second scan signal line is input as low level;
6th transistor: drain electrode is connected with the first reference voltage source positive pole, and source electrode drains with transistor seconds and is connected, and grid is connected with the second scan signal line, and the just conducting when the second scan signal line is input as low level;
7th transistor: drain electrode is connected with the source electrode of the 5th transistor, and source electrode is connected with the first initial voltage source positive pole, and grid is connected with the 3rd scan signal line, and the just conducting when the 3rd scan signal line is input as low level;
8th transistor: drain electrode is connected with the first transistor source electrode, source electrode is connected with Organic Light Emitting Diode positive pole, grid is connected with the first LED control signal line, and the just conducting when the first light emitting control line is input as low level, and the 5th transistor different with the 8th transistor time conducting, when the 5th transistor turns, the 8th transistor always turns off.
OLED pixel-driving circuit of the present invention can be thought and to be made up of circuit 1 and circuit 2:
Circuit 1 is used for controlling the electric current of Organic Light Emitting Diode, comprises:
First electric capacity: be connected between the grid of the first transistor and the first positive supply positive pole, the first electric capacity is for ensureing the threshold voltage of the first transistor;
Second electric capacity: be connected between the grid of the first transistor and the drain electrode of transistor seconds, when there being data scanning, the second electric capacity will carry out discharge and recharge;
3rd electric capacity: be connected between the source electrode of the 6th transistor and the source electrode of the 4th transistor;
The first transistor: drain electrode is connected with the first positive supply positive pole, and source electrode is connected with the drain electrode of the 5th transistor, and grid is connected with the source electrode of the 5th transistor, controls to be supplied to Organic Light Emitting Diode electric current by power supply;
Transistor seconds: drain electrode is connected with the source electrode of the 6th transistor, and source electrode is connected with data signal line, and grid is connected with the first scan signal line, and the just conducting when the first sweep trace is input as low level;
5th transistor: drain electrode is connected with the first transistor source electrode, and source electrode is connected with the drain electrode of the 7th transistor, and grid is connected with the second scan signal line, and the just conducting when the second scan signal line is input as low level;
6th transistor: drain electrode is connected with the first reference voltage source positive pole, and source electrode drains with transistor seconds and is connected, and grid is connected with the second scan signal line, and the just conducting when the second scan signal line is input as low level;
7th transistor: drain electrode is connected with the source electrode of the 5th transistor, and source electrode is connected with the first initial voltage source positive pole, and grid is connected with the 3rd scan signal line, and the just conducting when the 3rd scan signal line is input as low level;
8th transistor: drain electrode is connected with the first transistor source electrode, source electrode is connected with Organic Light Emitting Diode positive pole, grid is connected with the first LED control signal line, and the just conducting when the first light emitting control line is input as low level, and the 5th transistor different with the 8th transistor time conducting, when the 5th transistor turns, the 8th transistor always turns off.
Circuit 2 is used for compensating the brightness decay of Organic Light Emitting Diode, comprises:
Third transistor: drain electrode is connected with the source electrode of the 4th transistor, source electrode is connected with the first initial voltage source positive pole, grid is connected with the second light emitting control line, and the just conducting when the second light emitting control line is input as low level, conducting when transistor seconds is different with third transistor, a driving voltage higher than Organic Light Emitting Diode, a driving voltage lower than Organic Light Emitting Diode;
4th transistor: drain electrode is connected with Organic Light Emitting Diode positive pole, and source electrode is connected with the drain electrode of third transistor, and grid is connected with the first scan signal line, and the just conducting when the first scan signal line is input as low level.
The present invention compared with prior art, has following substantive distinguishing features and advantage:
One-period of the present invention is divided into four-stage to ensure the continual and steady luminescence of OLED energy, and brightness slowly can not decay along with the increase of time as traditional OLED driver circuit, the threshold voltage of the first transistor (driving tube) can be compensated, the not pressure drop of tube voltage, image can reach the brightness of expection.
Accompanying drawing explanation
Fig. 1 is a kind of physical circuit schematic diagram of OLED pixel compensation driving circuit of stable output.
Fig. 2 is the waveform diagram of Fig. 1 pixel-driving circuit.
Fig. 3 is E1, E2, S1, S2, S3 signal in Fig. 1, simulation waveform through OLED electric current and node N1 voltage.
Embodiment
Details are as follows by reference to the accompanying drawings for the preferred embodiments of the present invention, embodiment one: please refer to Fig. 1, Fig. 2 and Fig. 3.This OLED pixel-driving circuit comprises:
Organic Light Emitting Diode OLED: positive pole is connected with the source electrode of the 8th transistor M8, negative pole is connected with the first negative supply VSS positive pole;
First positive supply VDD: positive pole connects the drain electrode of the first transistor M1, minus earth;
First negative supply VSS: positive pole is connected with the negative pole of OLED OLED, minus earth;
First reference voltage source Vref: positive pole connects the drain electrode of the 6th transistor M6, minus earth;
First initial voltage source Vint: positive pole connects the source electrode of third transistor M3 and the source electrode of the 7th transistor M7;
First scan signal line S1: connect the grid of transistor seconds M2 and the grid of the 4th transistor M4;
Second scan signal line S2: connect the grid of the 6th transistor M6 and the grid of the 5th transistor M5;
3rd scan signal line S3: the grid connecting the 7th transistor M7;
First light emitting control line E1: the grid connecting the 8th transistor M8;
Second light emitting control line E2: the grid connecting third transistor M3;
Data signal line Dm: the source electrode connecting transistor seconds M2;
First electric capacity C1: be connected between the grid of the first transistor M1 and the first positive supply VDD positive pole, the first electric capacity C1 is for ensureing the threshold voltage of the first transistor M1;
Second electric capacity C2: be connected between the grid of the first transistor M1 and the drain electrode of transistor seconds M2, when there being data scanning, the second electric capacity C2 will carry out discharge and recharge;
3rd electric capacity C3: be connected between the source electrode of the 6th transistor M6 and the source electrode of the 4th transistor M4;
The first transistor M1: drain electrode is connected with the first positive supply VDD positive pole, and source electrode is connected with the drain electrode of the 5th transistor M5, and grid is connected with the source electrode of the 5th transistor M5, controls to be supplied to Organic Light Emitting Diode OLED electric current by power supply;
Transistor seconds M2: drain electrode is connected with the source electrode of the 6th transistor M6, and source electrode is connected with data signal line Dm, and grid is connected with the first scan signal line S1, and the just conducting when the first sweep trace S1 is input as low level;
Third transistor M3: drain electrode is connected with the source electrode of the 4th transistor M4, source electrode is connected with the first initial voltage source Vint positive pole, grid is connected with the second light emitting control line E2, and the just conducting when the second light emitting control line E2 is input as low level, conducting when transistor seconds M2 is different with third transistor M3, a driving voltage higher than Organic Light Emitting Diode OLED, a driving voltage lower than Organic Light Emitting Diode OLED;
4th transistor M4: drain electrode is connected with Organic Light Emitting Diode OLED positive pole, and source electrode is connected with the drain electrode of third transistor M3, and grid is connected with the first scan signal line S1, and the just conducting when the first scan signal line S1 is input as low level;
5th transistor M5: drain electrode is connected with the first transistor M1 source electrode, and source electrode is connected with the drain electrode of the 7th transistor M7, and grid is connected with the second scan signal line S2, and the just conducting when the second scan signal line S2 is input as low level;
6th transistor M6: drain electrode is connected with the first reference voltage source Vref positive pole, and source electrode drains with transistor seconds M2 and is connected, and grid is connected with the second scan signal line S2, and the just conducting when the second scan signal line S2 is input as low level;
7th transistor M7: drain electrode is connected with the source electrode of the 5th transistor M5, and source electrode is connected with the first initial voltage source Vint positive pole, and grid is connected with the 3rd scan signal line S3, and the just conducting when the 3rd scan signal line S3 is input as low level;
8th transistor M8: drain electrode is connected with the first transistor M3 source electrode, source electrode is connected with Organic Light Emitting Diode OLED positive pole, grid is connected with the first LED control signal line E1, and the just conducting when the first light emitting control line E1 is input as low level, and the 5th transistor M5 different with the 8th transistor M8 time conducting, when the 5th transistor M5 conducting, the 8th transistor M8 always turns off.
Embodiment two: this OLED pixel-driving circuit is made up of circuit 1 and circuit 2:
Fig. 1 illustrates there are five sweep signals, i.e. the first light emitting control line E1, the second light emitting control line E2, the first sweep trace S1, the second sweep trace S2, three scan line S3.Circuit 1 is used to the electric current of control OLED, and circuit 2 is used to the decay compensating OLED brightness.
The positive pole connection circuit 1 of OLED, negative pole meets power supply VSS.The electric current that OLED is provided by circuit 1 is to show the brightness of expection.
Circuit 1 controls the electric current being supplied to OLED.Circuit 1 comprises the first transistor M1, transistor seconds M2, the 5th transistor M5, the 6th transistor M6, the 7th transistor M7, the 8th transistor M8, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, first node N1, Section Point N2.
The drain electrode of driving tube M1 meets the first positive supply positive pole VDD, and source electrode connects the drain electrode of transistor M8, and grid receives node N1.The voltage that driving tube M1 is provided by N1 is to the electric current of control OLED.
Transistor M2 source electrode meets data line Dm, and drain electrode meets node N2.Grid meets sweep trace S1, and when sweep signal S1 input low level, M2 conducting, data Dm voltage passes on node N2.
The drain electrode of transistor M5 is connected on the source electrode of M1, and source electrode meets node N1, and grid meets sweep trace S2.When S2 input low level, M5 conducting, the source electrode of M1 is connected with node N1, and now driving tube M1 is equivalent to a diode.
The grid of transistor M6 meets sweep trace S2, and drain electrode meets reference voltage source Vref and source electrode meets node N2, and when S2 input low level, M6 conducting, now reference voltage source Vref applies on node n 2.Reference voltage source Vref higher than the voltage of complete dark data-signal, lower than the voltage of complete bright signal.
The grid of transistor M7 meets sweep trace S3, and source electrode meets primary power Vint and drain electrode meets node N1, and when S3 input low level, M7 conducting, voltage Vint is applied on node N1.The voltage of primary power Vint lower than the voltage of VDD, the such as voltage lower than OLED threshold voltage.
The grid sending and receiving photocontrol line E1 of transistor M8, drain electrode connects the positive pole that the source electrode of M1 and source electrode meet OLED.And the M8 conducting when E1 is input as low level.
Electric capacity C1 is connected between node N1 and VDD.Electric capacity C1 charges with the threshold voltage reaching driving tube M1.
Electric capacity C2 is connected between node N1 and node N2, and when there being data-signal to input, C2 charges, and the voltage of rate of change control N1 node by N2 node voltage.
Electric capacity C3 is connected between node N2 and N3, and electric capacity C3 carrys out the voltage of Controlling vertex N2 by the voltage changing rate of node N3.
Circuit 2 compensates the voltage of N2 node to ensure that OLED can be luminous sustainedly and stably.Circuit 2 comprises third transistor M3, the 4th transistor M4, the 3rd node N3.
The drain electrode of third transistor M3 is connected with the source electrode of the 4th transistor, and source electrode is connected with the first initial voltage source Vint, and grid is connected with E2, and the conducting when E2 is low level.
4th transistor M4 drain electrode is connected with Organic Light Emitting Diode positive pole, and source electrode is connected with the drain electrode of third transistor M3, and grid is connected with S1, when S1 is input as low level, and M4 conducting.
Fig. 2 is the waveform diagram of Fig. 1 pixel-driving circuit.Suppose that the cycle of sweep signal is 4T according to Fig. 2.
According to Fig. 2, be supplied to sweep trace S3 at T1 intermittent scanning signal.The first light emitting control line E1 is supplied at T1 and T2 cycle first LED control signal.
When sweep signal is supplied to S3, transistor M7 conducting.When transistor M7 conducting, the voltage of primary power Vint is supplied to N1 node.
When the first LED control signal is supplied to the first light emitting control line E1, transistor M8 turns off.When transistor M8 turns off, transistor M1 and OLED is separated, and OLED is not luminous.
Be supplied to sweep trace S2 at T2 intermittent scanning signal, be supplied to the second light emitting control line E2 at T2 and T3 cycle second LED control signal.
When sweep signal is supplied to sweep trace S2, transistor M5 and M6 conducting.When transistor M6 conducting, the voltage of reference voltage source Vref is supplied to N2 node.When transistor M5 conducting, transistor M1 is equivalent to a diode.When transistor M1 is equivalent to a diode, the magnitude of voltage of N1 node is just equivalent to the threshold voltage that the first voltage source V DD deducts transistor M1.Meanwhile, electric capacity C1 starts charging with the threshold voltage of transistor M1.
When the second LED control signal is supplied to the second light emitting control line E2, transistor M3 turns off.Now, primary power Vint and N3 node disconnect.
Sweep trace S1 is supplied at T3 intermittent scanning signal, when sweep signal is supplied to sweep trace S1, transistor M2 and M4 conducting.
When transistor M2 conducting, data-signal is supplied to node N2 from data line Dm.
When transistor M4 conducting, conducting between node N3 and OLED.Then, the voltage on OLED is supplied to node N3, and OLED is luminous.
Be low level at T4 cycle second light emitting control line E2.When the second light emitting control line E2 is low level, transistor M3 conducting.When transistor M3 conducting, the voltage of primary power Vint is supplied to N3 node.Meanwhile, N3 node voltage value drops to the voltage of primary power Vint from the voltage of OLED.When N3 node voltage value declines, the magnitude of voltage of node N2 also declines due to the existence of electric capacity C3, and the magnitude of voltage of node N1 also declines due to the existence of electric capacity C2.Meanwhile, transistor M1 is according to the electric current on the magnitude of voltage change control OLED of node N1.
Simultaneously along with passage of time OLED becomes unstable.When OLED becomes unstable, under same electric current, the magnitude of voltage on OLED uprises.Therefore the voltage drop scope when OLED becomes unstable on N3 node starts to become large.When the voltage drop scope on N3 node starts to become large, the voltage drop scope of node N1 and N2 also becomes large, thus may compensate for the instability of OLED.
In other words, along with OLED becomes unstable, the electric current that transistor M1 is supplied to OLED can become large, thus may compensate for OLED.
In the T4 cycle, OLED is luminous, and the voltage of primary power Vint is supplied to M3.
Fig. 3 is the Transient oscillogram of Fig. 1.Wherein E1, E2, S1, S2, S3 are the voltage waveforms of input signal.The electric current being through OLED of/I2/vp emulation ,/N1 emulation be the voltage of N1 node.
Find out from Fig. 3 figure, be supplied to sweep trace S3 at T1 intermittent scanning signal.The first light emitting control line E1 is supplied at T1 and T2 cycle first LED control signal.When sweep signal is supplied to S3, transistor M7 conducting.When transistor M7 conducting, the voltage of primary power Vint is supplied to N1 node.When the first LED control signal is supplied to the first light emitting control line E1, transistor M8 turns off.When transistor M8 turns off, transistor M1 and OLED disconnects, and OLED is not luminous, the current value of OLED be 0, N1 node voltage due to transistor M7 conducting, so value equals Vint voltage.
Be supplied to sweep trace S2 at T2 intermittent scanning signal, be supplied to the second light emitting control line E2 at T2 and T3 cycle second LED control signal.When sweep signal is supplied to sweep trace S2, transistor M5 and M6 conducting.When transistor M6 conducting, the voltage of reference voltage source Vref is supplied to N2 node.When transistor M5 conducting, transistor M1 is equivalent to a diode.When transistor M1 is equivalent to a diode, the magnitude of voltage of N1 node is just equivalent to the threshold voltage that the first voltage source V DD deducts transistor M1.Meanwhile, electric capacity C1 starts charging with the threshold voltage of transistor M1.When the second LED control signal is supplied to the second light emitting control line E2, transistor M3 turns off.Now, primary power Vint and N3 node disconnect.Transistor M8 conducting not yet, so the current value of OLED is still 0, N1 node voltage because transistor M7 disconnects and the existence of electric capacity C1, magnitude of voltage rises to the value close to VDD.
Sweep trace S1 is supplied at T3 intermittent scanning signal, when sweep signal is supplied to sweep trace S1, transistor M2 and M4 conducting.When transistor M2 conducting, data-signal is supplied to node N2 from data line Dm.When transistor M4 conducting, conducting between node N3 and OLED.Then, the voltage on OLED is supplied to node N3.Transistor M8 conducting, OLED starts there is electric current, and because driving tube M1 is in conducting state always, as long as so M8 conducting, OLED just has electric current, the voltage simultaneously on N1 node declines slightly to some extent due to the existence of M8 conducting and electric capacity C1.
Be low level at T4 cycle second light emitting control line E2.When the second light emitting control line E2 is low level, transistor M3 conducting.When transistor M3 conducting, the voltage of primary power Vint is supplied to N3 node.Meanwhile, N3 node voltage value drops to the voltage of primary power Vint from the voltage of OLED.When N3 node voltage value declines, the magnitude of voltage of node N2 also declines due to the existence of electric capacity C3, and the magnitude of voltage of node N1 also declines due to the existence of electric capacity C2.Meanwhile, transistor M1 is according to the electric current on the magnitude of voltage change control OLED of node N1.Simultaneously along with passage of time OLED starts to become unstable.When OLED starts to become unstable, under same electric current, the magnitude of voltage on OLED uprises.Therefore the voltage drop scope when OLED starts to become instability on N3 node starts to become large.When the voltage drop scope on N3 node starts to become large, the voltage drop scope of node N1 and N2 also becomes large, thus may compensate for the instability of OLED.In the T4 cycle, OLED electric current can decline along with passage of time originally, but due to transistor M3 conducting, causes N1 node voltage sharply to decline, and the threshold voltage of driving tube M1 becomes large, and the electric current on OLED also becomes large, thus stabilizes the electric current on OLED.
Claims (1)
1., at a kind of OLED pixel-driving circuit, comprise:
Organic Light Emitting Diode OLED: positive pole is connected with the source electrode of the 8th transistor M8, negative pole is connected with the first negative supply VSS positive pole;
First positive supply VDD: positive pole connects the drain electrode of the first transistor M1, minus earth;
First negative supply VSS: positive pole is connected with the negative pole of OLED OLED, minus earth;
First reference voltage source Vref: positive pole connects the drain electrode of the 6th transistor M6, minus earth;
First initial voltage source Vint: positive pole connects the source electrode of third transistor M3 and the source electrode of the 7th transistor M7, minus earth;
First scan signal line S1: connect the grid of transistor seconds M2 and the grid of the 4th transistor M4;
Second scan signal line S2: connect the grid of the 6th transistor M6 and the grid of the 5th transistor M5;
3rd scan signal line S3: the grid connecting the 7th transistor M7;
First light emitting control line E1: the grid connecting the 8th transistor M8;
Second light emitting control line E2: the grid connecting third transistor M3;
Data signal line Dm: the source electrode connecting transistor seconds M2;
First electric capacity C1: be connected between the grid of the first transistor M1 and the drain electrode of the first transistor M1;
Second electric capacity C2: be connected between the grid of the first transistor M1 and the drain electrode of transistor seconds M2;
3rd electric capacity C3: be connected between the source electrode of the 6th transistor M6 and the source electrode of the 4th transistor M4;
The first transistor M1: drain electrode is connected with the first positive supply VDD positive pole, and source electrode is connected with the drain electrode of the 5th transistor M5, and grid is connected with the source electrode of the 5th transistor M5;
Transistor seconds M2: drain electrode is connected with the source electrode of the 6th transistor M6, and source electrode is connected with data signal line Dm, and grid is connected with the first scan signal line S1;
Third transistor M3: drain electrode is connected with the source electrode of the 4th transistor M4, and source electrode is connected with the first initial voltage source Vint positive pole, and grid is connected with the second light emitting control line E2;
4th transistor M4: drain electrode is connected with Organic Light Emitting Diode OLED positive pole, and source electrode is connected with the drain electrode of third transistor M3, and grid is connected with the first scan signal line;
5th transistor M5: drain electrode is connected with the first transistor M1 source electrode, and source electrode is connected with the drain electrode of the 7th transistor M7, and grid is connected with the second scan signal line S2;
6th transistor M6: drain electrode is connected with the first reference voltage source Vref positive pole, and source electrode drains with transistor seconds M2 and is connected, and grid is connected with the second scan signal line S2;
7th transistor M7: drain electrode is connected with the source electrode of the 5th transistor M5, and source electrode is connected with the first initial voltage source Vint positive pole, and grid is connected with the 3rd scan signal line S3;
8th transistor M8: drain electrode is connected with the first transistor M1 source electrode, and source electrode is connected with Organic Light Emitting Diode OLED positive pole, and grid is connected with the first LED control signal line E1.
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Cited By (3)
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| CN104992674A (en) * | 2015-07-24 | 2015-10-21 | 上海和辉光电有限公司 | Pixel compensation circuit |
| WO2018153336A1 (en) * | 2017-02-22 | 2018-08-30 | 昆山国显光电有限公司 | Pixel driving circuit and driving method thereof, and layout structure of transistor |
| CN109036288A (en) * | 2018-09-28 | 2018-12-18 | 昆山国显光电有限公司 | Pixel circuit and its control method |
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| CN1964585A (en) * | 2005-11-09 | 2007-05-16 | 三星Sdi株式会社 | Pixel and organic light emitting display device using the same |
| KR20100053233A (en) * | 2008-11-12 | 2010-05-20 | 엘지디스플레이 주식회사 | Organic electro-luminescent display device and driving method thereof |
| KR20110078387A (en) * | 2009-12-31 | 2011-07-07 | 엘지디스플레이 주식회사 | Organic light emitting device and method of driving the same |
| CN102339586A (en) * | 2010-07-19 | 2012-02-01 | 三星移动显示器株式会社 | Pixel and organic light emitting display using the same |
| US20120038605A1 (en) * | 2010-08-11 | 2012-02-16 | Samsung Mobile Display Co., Ltd. | Pixel and Organic Light Emitting Display Device Using the Same |
| KR20130055450A (en) * | 2011-11-18 | 2013-05-28 | 엘지디스플레이 주식회사 | Organic light-emitting display device |
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| CN104992674A (en) * | 2015-07-24 | 2015-10-21 | 上海和辉光电有限公司 | Pixel compensation circuit |
| WO2018153336A1 (en) * | 2017-02-22 | 2018-08-30 | 昆山国显光电有限公司 | Pixel driving circuit and driving method thereof, and layout structure of transistor |
| US10692432B2 (en) | 2017-02-22 | 2020-06-23 | Kunshan Go-Visionox Opto-Electronics Co., Ltd. | Pixel driving circuit and driving method thereof, and layout structure of transistor |
| CN109036288A (en) * | 2018-09-28 | 2018-12-18 | 昆山国显光电有限公司 | Pixel circuit and its control method |
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Application publication date: 20150401 |