CN101192374B - Organic luminous display panel and its voltage drive organic light emitting pixel - Google Patents
Organic luminous display panel and its voltage drive organic light emitting pixel Download PDFInfo
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- CN101192374B CN101192374B CN200610163954XA CN200610163954A CN101192374B CN 101192374 B CN101192374 B CN 101192374B CN 200610163954X A CN200610163954X A CN 200610163954XA CN 200610163954 A CN200610163954 A CN 200610163954A CN 101192374 B CN101192374 B CN 101192374B
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Abstract
The invention discloses a large-size active organic light emitting display panel and voltage driving organic light emitting pixel thereof, which comprise an organic light emitting diode, a data writing circuit, a capacitor, a first transistor, a second transistor, a third transistor and a first switch; among which, the data writing circuit comprises a second switch and a third switch. Compared with the prior structure, the voltage driving organic light emitting pixel of the invention can make up for the deficiency that the difference of the critical voltages between the thin film transistors (TFT) in the low-temperature poly-silicon (LPS) causes the picture to be displayed with Mura on the active organic electroluminescence display, and can improve the deficiency that the IR drop on the panel causes the Mura on the display of the picture and can enhance the stability of the circuit and has larger aperture ratio.
Description
Technical field
The invention relates to a kind of organic electroluminescence display panel, and particularly relevant for a kind of organic electroluminescence display panel with compensation different critical voltage function.
Background technology
Have electronic product light, thin, short, little characteristic now and receive popular the liking and acceptance of mass society; Also because flat-panel screens has gently, approaches and be easy to the advantage of placing and carrying compared to the vacuum tube display of old type, so become quite general at present and promising electronic product.
Please refer to Fig. 1, it is existing driven organic light emission pixel that Fig. 1 illustrates, and this driven organic light emission pixel 100 has transistor m1, m2, m4, m5, m6 and capacitor C
St, capacitor C again
StHave end points c, d.In addition, keep pressure-wire Sus_N-3 and be electrically coupled to transistor m5, and sweep trace Scan_N-3 is electrically coupled to the grid of transistor m2, m4, m5, m6, data line Data_N-3 is electrically coupled to transistor m6 again.In addition, go up contained signal according to sweep trace Scan_N-3 and can determine end points c conducting to keeping pressure-wire Sus_N-3 or data line Data_N-3, and an end electric property coupling first predetermined voltage V of transistor m1
DDAnd the end of transistor m4 is electrically coupled to an end of Organic Light Emitting Diode 110, and the end in addition of Organic Light Emitting Diode 110 is electrically coupled to the second predetermined voltage V simultaneously
SSThis kind circuit framework can be to critical voltage V inequality between each driving transistors between driven organic light emission pixel thus
ThCompensate.But this image element circuit will reach the function of compensation, and a condition precedent must be arranged, and the voltage that promptly before data write, must guarantee end points d is pulled to and is lower than V
DD-V
ThCurrent potential, otherwise the compensate function of this image element circuit can lose efficacy.But the framework of this circuit is not done this action of guaranteeing, so can know that the degree of stability of this image element circuit is too low and make panel produce the phenomenon of brightness disproportionation (Mura) because of reaching compensate function probably.
It is the detailed signal graph of Fig. 1 that Fig. 2 illustrates, and please be loaded with the voltage data signal V of data-signal Data0 on the data line Data_N-3 simultaneously with reference to figure 1 and Fig. 2
Data0, and on sweep trace Scan_N-3, be loaded with scanning voltage signal V
Scan_N, keep again to be loaded with on the pressure-wire Sus_N-3 and keep voltage V
SusWhen picture 0, this moment, sweep signal was " low " the logic current potential, end points c will write the voltage data signal V of the data-signal Data0 on the data line Data_N
Data0And the voltage of end points d will be pulled to V
DD-V
ThNext, be in sweep signal " height " during the logic current potential, drawn (V on the end points c voltage
Sus-V
Data0) voltage difference, this moment, the current potential of end points d will be because of capacitor C
StPressure stabilization function and be pulled to V
DD-V
Th+ (V
Sus-V
Data0), next be similar to the action of picture 0, but can find out by Fig. 2 in the action of picture 1, before data-signal Data1 writes end points c, V
d＞V
DD-V
ThSituation do not improve yet, this will make the function of critical voltage between the driving transistors that can not reach the different driven organic light emission pixel of compensation on the panel that this driven organic light emission pixel is constituted.
On the other hand, because the resolution of flat-panel screens is now day by day tended towards superiority, so existing pixel possibly can't be applied in the active organic light-emitting panel of high-res, its reason is that the transistor size in the pixel makes aperture opening ratio low excessively too much.
Summary of the invention
The object of the invention is providing a kind of driven organic light emission pixel exactly; It can guarantee that an end-point voltage of electric capacity is lower than specific potential before each data write; The difference of guaranteeing the critical voltage of indivedual driving transistorss in the pixel in the display panel whereby can be compensated, and avoids the uneven shortcoming generation of each pixel intensity on the display panel and reach.
Another object of the present invention is providing a kind of organic light emission pixel display panel exactly, and it has aforesaid driven organic light emission pixel, and it can make pixel have bigger aperture opening ratio, thereby increases the luminosity of pixel and reduce cost.
A purpose more of the present invention is providing a kind of organic light emission pixel display panel exactly, and it can improve the picture that is caused because of power supply decline (IR drop) on the panel and show uneven shortcoming.
Driven organic light emission pixel of the present invention comprises Organic Light Emitting Diode, data write circuit, electric capacity, the first transistor, transistor seconds, the 3rd transistor AND gate first switch.Wherein Organic Light Emitting Diode has first end points and second end points.Data write circuit is electrically coupled to data line, keeps the pressure-wire and first sweep trace, and data write circuit electrically conducts to data line according to contained its output terminal of first sweep signal decision of first sweep trace or keeps pressure-wire.Electric capacity has first end and second end, and first end of electric capacity is electrically coupled to the output terminal of data write circuit.
In addition; The first transistor has first/secondary signal in-out end and a control end; The first signal in-out end of the first transistor is electrically coupled to first predetermined voltage, and its secondary signal in-out end is electrically coupled to first end points, and its control end is electrically coupled to second end of electric capacity.Transistor seconds has first/secondary signal in-out end and a control end; The first signal in-out end of transistor seconds is electrically coupled to the control end of the first transistor; Its secondary signal in-out end is electrically coupled to first end points, and its control end electrically receives first sweep signal.The 3rd transistor has first/secondary signal in-out end and a control end, and the 3rd transistorized first signal in-out end and control end are electrically coupled to second sweep trace, and its secondary signal in-out end is electrically coupled to the first signal in-out end of transistor seconds.Whether one end of first switch is electrically coupled to second end points, and the other end is electrically coupled to second predetermined voltage, and open with decision according to the control of first sweep signal.And first, second and third above-mentioned transistor is the transistor of same type, and the scanning of second sweep trace ordering is sitting at before first sweep trace.
In one embodiment of this invention, data write circuit comprises second switch and the 3rd switch.Whether wherein second switch is electrically coupled between the output terminal of keeping pressure-wire and data write circuit, and open with decision according to first sweep signal.Whether and the 3rd switch is electrically coupled between the output terminal of data line and data write circuit, and open with decision according to first sweep signal, and wherein the opening time of second switch and the 3rd switch is not overlapping.
In one embodiment of this invention; First switch of driven organic light emission pixel comprises the 4th transistor; It has first/secondary signal in-out end and a control end; Its first signal in-out end is electrically coupled to second end points, and control end receives first sweep signal, and its secondary signal in-out end is electrically coupled to second predetermined voltage.And second switch comprises the 5th transistor; It has first/secondary signal in-out end and a control end; Its first signal in-out end is electrically coupled to keeps pressure-wire, and control end receives first sweep signal, and its secondary signal in-out end is electrically coupled to the output terminal of data write circuit.The 3rd switch comprises the 6th transistor; It has first/secondary signal in-out end and a control end; Its first signal in-out end is electrically coupled to data line, and the secondary signal in-out end is electrically coupled to the output terminal of data write circuit, and its control end receives first sweep signal.Wherein, the 6th transistor AND gate the first transistor is the transistor of homotype, and the 4th, the 5th transistor AND gate the first transistor is veriform transistor.
In one embodiment of this invention, data write circuit comprises second switch and the 3rd switch.Wherein second switch is electrically coupled between the output terminal of keeping pressure-wire and data write circuit, and whether the inversion signal of the reception and the first sweep signal anti-phase is opened with decision.Whether the 3rd switch is electrically coupled between the output terminal of data line and data write circuit, and open with decision according to first sweep signal.Wherein, the opening time of second switch and the 3rd switch is not overlapping.Further; First switch comprises the 4th transistor; And the 4th transistor has first/secondary signal in-out end and a control end; Wherein the first signal in-out end is electrically coupled to second end points, and control end receives inversion signal, and its secondary signal in-out end is electrically coupled to second predetermined voltage.And second switch comprises the 5th transistor; It has first/secondary signal in-out end and a control end; And its first signal in-out end is electrically coupled to keeps pressure-wire, and control end receives inversion signal, and its secondary signal in-out end is electrically coupled to the output terminal of data write circuit.And the 3rd switch comprises one the 6th transistor; It has first/secondary signal in-out end and a control end; And its first signal in-out end is electrically coupled to data line, and the secondary signal in-out end is electrically coupled to the output terminal of data write circuit, and its control end receives first sweep signal.
Whether of the present invention a kind of organic electroluminescence display panel is provided in addition, utilizes a plurality of organic light emission pixels of multi-strip scanning line traffic control to open, wherein a plurality of organic light emission pixels can be used above-mentioned organic light emission pixel.Wherein, This organic electroluminescence display panel according to first sweep signal determining its output terminal and electrically conduct or to keep in the organic light emission pixel of pressure-wire to data line, state first end that second end points is coupled to first switch before having two organic light emission pixels at least.The switch of winning can be drawn out to outside the pixel, and cause aperture ratio of pixels to increase and can reduce the production cost of active organic electroluminescent display pannel.
For let above-mentioned and other purposes of the present invention, feature and advantage can be more obviously understandable, below specially lift preferred embodiment, and cooperate appended graphicly, elaborate.
Description of drawings
It is the circuit diagram of existing driven organic light emission pixel that Fig. 1 illustrates.
It is the detailed signal graph of Fig. 1 that Fig. 2 illustrates.
It is the circuit block diagram according to the driven organic light emission pixel of one embodiment of the invention that Fig. 3 A illustrates.
It is the circuit diagram of driven organic light emission pixel according to an embodiment of the invention that Fig. 3 B illustrates.
It is the detailed signal graph of Fig. 3 B that Fig. 4 illustrates.
It is the driven organic light emission pixel according to another embodiment of Fig. 3 B that Fig. 5 illustrates.
It is the driven organic light emission pixel according to the embodiment again of Fig. 3 B that Fig. 6 illustrates.
It is the partial circuit figure according to the formed organic electroluminescence display panel of driven organic light emission pixel of Fig. 6 that Fig. 7 illustrates.
It is the partial circuit figure according to another organic electroluminescence display panel of the partial circuit figure of the organic electroluminescence display panel of Fig. 7 that Fig. 8 illustrates.
It is the partial circuit figure of the formed organic electroluminescence display panel of driven organic light emission pixel according to Fig. 5 of the present invention that Fig. 9 illustrates.
It is the partial circuit figure of the formed organic electroluminescence display panel of driven organic light emission pixel according to Fig. 3 B of the present invention that Figure 10 illustrates.
The main element symbol description is following among the figure:
M1, m2, m4, m5, m6: transistor;
C
St, 330: electric capacity;
700,800,900,1000: organic electroluminescence display panel;
100,300,500,600,710,720,730,740,750,760,770,780,790,810,820,830,840,850,860,870,880,890,910,920,930,940,950,960,970,980,990,1010,1020,1030,1040,1050,1060,1070,1080,1090: driven organic light emission pixel
310: Organic Light Emitting Diode;
310a, 610a: first end points;
310b, 610b: second end points;
320,620: data write circuit;
322,323,622,623,370,670: switch;
A, b, c, d: end points;
M1～M8, M41～M43, M71～M73: transistor;
Data_N-3, Data_N, Data_N+1, Data_N+2: data line;
Data0, Data1: data-signal;
V
Data0, V
Data1: voltage data signal;
Scan_N-3, Scan_N-1, Scan_N, Scan_N+1, Scan_N+2: sweep trace;
V
Scan_N, V
Scan_N-1: the scanning voltage signal;
Sus_N-3, Sus_N: keep pressure-wire;
V
Sus: keep voltage;
ILC1, ILC2, ILR1～ILR4: insulation course;
Inv1, Inv2, Inv3: phase inverter;
V
DD: first predetermined voltage;
V
SS: second predetermined voltage;
V
ThCritical voltage.
Embodiment
Below please refer to Fig. 3 A, it illustrates the circuit block diagram of the driven organic light emission pixel that is one embodiment of the invention.In one embodiment of this invention, driven organic light emission pixel 300 its include OLED 310, data write circuit 320, electric capacity 330, transistor M1, M2, M3 and switch 370.
Wherein, Organic Light Emitting Diode 310 includes the first end points 310a and the second end points 310b, and data write circuit 320 is electrically coupled to data line Data_N, keeps pressure-wire Sus_N and sweep trace Scan_N.The data write circuit 320 scanning voltage signal V contained again according to sweep trace Scan_N
Scan_NTo determine its output terminal to electrically conduct or to keep pressure-wire Sus_N to data line Data_N.Electric capacity 330 has end points a and end points b in addition, and end points a is electrically coupled to the output terminal of data write circuit 320.
It is the circuit diagram according to the driven organic light emission pixel of one embodiment of the invention that Fig. 3 B illustrates.Please be simultaneously with reference to figure 3A and Fig. 3 B.In Fig. 3 A, the first signal in-out end of transistor M1 is electrically coupled to the first predetermined voltage V
DD, its secondary signal in-out end is electrically coupled to the first end points 310a, and its control end is electrically coupled to the end points b of electric capacity 330.The first signal in-out end of transistor M2 is electrically coupled to the control end of transistor M1, and its secondary signal in-out end is electrically coupled to the first end points 310a, and its control end electrically receives scanning voltage signal V
Scan_NThe first signal in-out end of transistor M3 and the electrical coupling sweep trace of control end Scan_N-1, and its secondary signal in-out end is electrically coupled to the first signal in-out end of transistor M2.Wherein, an end of switch 370 is electrically coupled to the second end points 310b, and the other end is electrically coupled to the second predetermined voltage V
SS, and according to scanning voltage signal V
Scan_NControl with the decision whether open.Transistor M1 in the present embodiment, M2, M3 are all P type thin film transistor (TFT), and the scanning of sweep trace Scan_N-1 ordering is sitting at before the sweep trace Scan_N.
In Fig. 3 B, data write circuit 320 comprises switch 322 and switch 323.Wherein switch 322 is electrically coupled between the output terminal of keeping pressure-wire Sus_N and data write circuit 320, and according to scanning voltage signal V
Scan_NWhether open with decision.And switch 323 is electrically coupled between the output terminal of data line Data_N and data write circuit 320, and according to scanning voltage signal V
Scan_NWhether open with decision.Wherein, switch 322 is not overlapping with the opening time of switch 323.
In this embodiment, the switch 370 of driven organic light emission pixel comprises transistor M4, and its first signal in-out end is electrically coupled to the second end points 310b, and control end receives scanning voltage signal V
Scan_N, and its secondary signal in-out end is electrically coupled to the second predetermined voltage V
SSAnd switch 322 comprises transistor M5, and its first signal in-out end is electrically coupled to keeps pressure-wire Sus_N, and control end receives scanning voltage signal V
Scan_N, and its secondary signal in-out end is electrically coupled to the output terminal of data write circuit 320.Switch 323 comprises transistor M6, and its first signal in-out end is electrically coupled to data line Data_N, and the secondary signal in-out end is electrically coupled to the output terminal of data write circuit 320, and its control end receives scanning voltage signal V
Scan_NWherein, transistor M6 and transistor M1 are all P type thin film transistor (TFT), and transistor M4 and M5 are N type thin film transistor (TFT).
It is the detailed signal graph of Fig. 3 B that Fig. 4 illustrates, please be simultaneously with reference to figure 3B and Fig. 4.In picture 0, before data write, promptly at scanning voltage signal V
Scan_NSignal be " height " logic current potential and scanning voltage signal V
Scan_N-1Signal when being " low " logic current potential, this moment, transistor M3 opened, transistor M1 opens, transistor M5 opens, transistor M6 turn-offs, then end points a voltage is to keep pressure-wire Sus_N to go up the contained voltage V that keeps
SusAnd the voltage of end points b is scanning voltage signal V
Scan_N-1Low logic current potential add the critical voltage V of transistor M3
Th, i.e. V
Scan_N-1+ V
Th, can guarantee just that so end points b current potential at this moment is at V
DD-V
ThUnder.Write in data fashionable, i.e. scanning voltage signal V
Scan_NSignal be " low " logic current potential and scanning voltage signal V
Scan_N-1Signal when being " height " logic current potential, transistor M3 turn-offs, transistor M1 opens, transistor M5 turn-offs, transistor M6 opens, then end points a voltage be the voltage data signal V of data-signal Data0 at this moment
Data0, and the voltage of end points b just is pulled to V
DD-V
ThThen, promptly at scanning voltage signal V
Scan_NWith scanning voltage signal V
Scan_N-1Signal when being " height " logic current potential simultaneously, transistor M3 turn-offs, transistor M1 opens, transistor M5 opens, transistor M6 turn-offs, then end points a voltage is for keeping voltage V
Sus, that is the end points a voltage V that risen
Sus-V
Data0Value, make that the voltage of end points b is V because of the voltage stabilizing effect of electric capacity 330
DD-V
Th+ (V
Sus-V
Data0), so that Organic Light Emitting Diode 310 is luminous, flow through the electric current I of Organic Light Emitting Diode 310 this moment
dFor:
(1)
V wherein
GsBe the grid of transistor M1, the voltage difference of source electrode, and β is the electric current I that calculated flow is crossed Organic Light Emitting Diode 310
dParameter.Can know that by formula (1) all flow through the electric current I of Organic Light Emitting Diode 310
dWith voltage data signal V
Data0And keep voltage V
SusRelevant, however V
Data0With V
SusBut no current path is so can avoid the descend problem of (IR drop) of power supply to produce.
Next, when picture 1, the operation situation of end points a and end points b is as picture 0.By on can know that driven organic light emission pixel 300 of the present invention can make before each data write, guarantee that end points b voltage is at V
DD-V
ThFollowing so that write fashionablely in each data, end points b voltage can be pulled to V
DD-V
Th, image element circuit framework of the present invention can be reached the difference of the critical voltage between the driving transistors of each driven organic light emission pixel in the display panel that compensation pixel 300 constituted.
It is the driven organic light emission pixel according to another embodiment of Fig. 3 B that Fig. 5 illustrates.Please refer to Fig. 5, wherein driven organic light emission pixel 500 has transistor M1～M6, Organic Light Emitting Diode 310, electric capacity 330, and wherein electric capacity 330 has end points a, b.In addition, transistor M1 is electrically coupled to the first predetermined voltage V
DD, and transistor M4 is electrically coupled to the second predetermined voltage V
SSIn addition; Sweep trace Scan_N is electrically coupled to the control end of transistor M2, M4, M5 and M6; And can determine end points a conducting to keeping pressure-wire Sus_N or data line Data_N according to the scanning voltage signal on the sweep trace Scan_N, sweep trace Scan_N-1 is electrically coupled to the control end and the first signal in-out end of transistor M3 again.
Transistor M1, M2, M3 and M6 in the present embodiment is all P type thin film transistor (TFT), and transistor M4 and M5 are all N type thin film transistor (TFT) again, and the scanning of sweep trace Scan_N-1 ordering is sitting at before the sweep trace Scan_N.
Above-mentioned driven organic light emission pixel 500 also can reach the effect of the difference of the critical voltage between each driving transistors in the compensation display panel that it constituted.In addition, in the present embodiment, the transistor M4 and the second predetermined voltage V
SSIt is outer to increase the aperture opening ratio of driven organic light emission pixel 500 to be pulled to driven organic light emission pixel 500.
It is the driven organic light emission pixel according to the embodiment again of Fig. 3 B that Fig. 6 illustrates.Please be simultaneously with reference to figure 3B and Fig. 6; It all changes the transistor M1～M6 in the driven organic light emission pixel 300 of Fig. 3 B into P type thin film transistor (TFT) M1, M2, M3, M6, M7, M8, so can improve the acceptance rate of processing procedure and the stability and the reduction manufacturing cost of circuit.Furtherly; It includes OLED 610, data write circuit 620, electric capacity 330, transistor M1, M2, M3 and switch 670 in the driven organic light emission pixel 600; Wherein, Organic Light Emitting Diode 610 includes the first end points 610a and the second end points 610b.Data write circuit 620 is electrically coupled to data line Data_N, keeps pressure-wire Sus_N and sweep trace Scan_N again, and the data write circuit 620 scanning voltage signal V contained according to sweep trace Scan_N
Scan_NTo determine its output terminal to electrically conduct or to keep pressure-wire Sus_N to data line Data_N.Electric capacity 330 has end points a and end points b again, and end points a is electrically coupled to the output terminal of data write circuit 620.
In Fig. 6, the first signal in-out end of transistor M1 is electrically coupled to the first predetermined voltage V
DD, its secondary signal in-out end is electrically coupled to the first end points 610a, and its control end is electrically coupled to the end points b of electric capacity 330.The first signal in-out end of transistor M2 is electrically coupled to the control end of transistor M1, and its secondary signal in-out end is electrically coupled to the first end points 610a, and its control end is electrically coupled to scanning voltage signal V
Scan_NThe first signal in-out end and the control end of transistor M3 are electrically coupled to sweep trace Scan_N-1, and its secondary signal in-out end is electrically coupled to the first signal in-out end of transistor M2.Wherein, an end of switch 670 is electrically coupled to the second end points 610b, and the other end is electrically coupled to the second predetermined voltage V
SS, and according to scanning voltage signal V
Scan_NControl whether open with decision, and the scanning of sweep trace Scan_N-1 ordering is sitting at before the sweep trace Scan_N.
In Fig. 6, data write circuit 620 comprises switch 622 and switch 623.Wherein switch 622 is electrically coupled between the output terminal of keeping pressure-wire Sus_N and data write circuit 620, and according to scanning voltage signal V
Scan_NWhether open with decision.And switch 623 is electrically coupled between the output terminal of data line Data_N and data write circuit 620, and according to scanning voltage signal V
Scan_NWhether open with decision.Wherein, switch 622 is not overlapping with the opening time of switch 623.
In addition; For the switch of transistor M7 and M8 in the driven organic light emission pixel 600 that makes Fig. 6 and voltage situation can be as the transistor M4 of the driven organic light emission pixel 300 of Fig. 3 B and switch and the voltage situations of M5, so its control end that is electrically coupled to transistor M7 and M8 of anti-phase sweep trace
of in driven organic light emission pixel 600, having set up sweep trace Scan_N is to be used for driving transistors M7 and M8.
In this embodiment, the switch 670 of driven organic light emission pixel comprises transistor M7, and its first signal in-out end is electrically coupled to the second end points 610b, and control end is electrically coupled to the anti-phase sweep trace
And its secondary signal in-out end is electrically coupled to the second predetermined voltage V
SSAnd switch 622 comprises transistor M8; Its first signal in-out end is electrically coupled to keeps pressure-wire Sus_N, and control end is electrically coupled to the output terminal that anti-phase sweep trace
and its secondary signal in-out end are electrically coupled to data write circuit 620.Switch 623 comprises transistor M6, and its first signal in-out end is electrically coupled to data line Data_N, and the secondary signal in-out end is electrically coupled to the output terminal of data write circuit 620, and its control end receives scanning voltage signal V
Scan_NWherein M6, M7, M8 are all P type thin film transistor (TFT).
It is the partial circuit figure according to the formed organic electroluminescence display panel of driven organic light emission pixel of Fig. 6 that Fig. 7 illustrates.Please refer to Fig. 7, wherein the transistor M1 of each the driven organic light emission pixel 710～790 in the organic electroluminescence display panel, M2, M3, M6, M8, the first predetermined voltage V
DDAnd other interelement electric property couplings close and signal situation all similar in appearance to the driven organic light emission pixel 600 of Fig. 6 in transistor M1, M2, M3, M6, M8, the first predetermined voltage V
DDAnd other interelement electric property couplings close and signal situation.In addition; Transistor M71～M73 is configurable outside organic light emission pixel 710～790; Wherein at the driven organic light emission pixel 710,720 and the 730 all shared transistor M71 of this organic electroluminescence display panel 700; And driven organic light emission pixel 740,750 and 760 all shared transistor M72, driven organic light emission pixel 770,780 and 790 all shared transistor M73 again, and keep voltage V
SusFor 710～790 of driven organic light emission pixels shared.Simultaneously, the second predetermined voltage V
SSCan be coupled to the secondary signal in-out end of transistor M71, M72 and M73 and be disposed at outside the organic light emission pixel 710～790, this all makes the aperture opening ratio of each driven organic light emission pixel 710～790 in this organic electroluminescence display panel 700 increase.
In addition, it utilizes for example each transistorized on off state of 710～790 in the organic light emission pixel of multi-strip scanning line Scan_N, Scan_N+1, Scan_N+2 may command, wherein, keeps voltage V
SusIt is shared also to can be 710～790 of organic light emission pixels.And phase inverter Inv1, Inv2 and Inv3 are in order to indivedual signal inversion with sweep trace Scan_N, Scan_N+1, Scan_N+2; Wherein phase inverter Inv1 is in order to the signal of anti-phase sweep trace Scan_N and input in driven organic light emission pixel 710,720 and 730; Phase inverter Inv2 is in order to anti-phase sweep trace Scan_N+1 and input in driven organic light emission pixel 740,750 and 760, and phase inverter Inv3 is in order to anti-phase sweep trace Scan_N+2 and input in the driven organic light emission pixel 770,780,790.And; The signal of sweep trace Scan_N-1 and sweep trace Scan_N inputs in driven organic light emission pixel 710,720 and 730; Sweep trace Scan_N and Scan_N+1 input in driven organic light emission pixel 740,750 and 760 again, and sweep trace Scan_N+1 and Scan_N+2 input in the driven organic light emission pixel 770,780,790.In addition; Data line Data_N supply data is given with the driven organic light emission pixel 710,740,770 in the delegation; Data line Data_N+1 supply data is given with the driven organic light emission pixel 720,750,780 in the delegation, and the Data_N+2 supply data is given with the driven organic light emission pixel 730,760,790 in the delegation.
It is the partial circuit figure according to another organic electroluminescence display panel of the partial circuit figure of the organic electroluminescence display panel of Fig. 7 that Fig. 8 illustrates.Please refer to Fig. 8, wherein the transistor M1 of each the driven organic light emission pixel 810～890 in the organic electroluminescence display panel 800, M2, M3, M6, M8, the first predetermined voltage V
DDAnd other interelement electric property couplings close and signal situation all similar in appearance to the driven organic light emission pixel 600 of Fig. 6 in transistor M1, M2, M3, M6, M8, the first predetermined voltage V
DDAnd other interelement electric property couplings close and signal situation.In addition; Transistor M71～M73 is configurable outside organic light emission pixel 810～890; Wherein at the driven organic light emission pixel 810,820 and the 830 all shared transistor M71 of this organic electroluminescence display panel 800, and driven organic light emission pixel 840,850 and 860 all shared transistor M72, driven organic light emission pixel 870,880 and 890 all shared transistor M73 again; And, keep voltage V
SusFor 810～890 of driven organic light emission pixels shared.Simultaneously, the second predetermined voltage V
SSCan be coupled to the secondary signal in-out end of transistor M71, M72 and M73 and configurable outside organic light emission pixel 810～890, this all makes the aperture opening ratio of each driven organic light emission pixel 810～890 in this organic electroluminescence display panel 800 increase.
In addition, it utilizes for example each transistorized on off state of 810～890 in the organic light emission pixel of multi-strip scanning line Scan_N, Scan_N+1, Scan_N+2 may command, wherein, keeps voltage V
SusIt is shared also to can be 810～890 of organic light emission pixels.And phase inverter Inv1, Inv2 and Inv3 are in order to indivedual signal inversion with sweep trace Scan_N, Scan_N+1, Scan_N+2; Wherein phase inverter Inv1 is in order to the signal of anti-phase sweep trace Scan_N and input in driven organic light emission pixel 810,820 and 830; Phase inverter Inv2 is in order to anti-phase sweep trace Scan_N+1 and input in driven organic light emission pixel 840,850 and 860, and phase inverter Inv3 is in order to anti-phase sweep trace Scan_N+2 and input in the driven organic light emission pixel 870,880,890.And; The signal of sweep trace Scan_N-1 and sweep trace Scan_N inputs in driven organic light emission pixel 810,820 and 830; Sweep trace Scan_N and Scan_N+1 input in driven organic light emission pixel 840,850 and 860 again, and sweep trace Scan_N+1 and Scan_N+2 input in the driven organic light emission pixel 870,880,890.In addition; Data line Data_N supply data is given with the driven organic light emission pixel 810,840,870 in the delegation; Data line Data_N+1 supply data is given with the driven organic light emission pixel 820,850,880 in the delegation, and the Data_N+2 supply data is given with the driven organic light emission pixel 830,860,890 in the delegation.
Further; In organic electroluminescence display panel 800, use insulation course ILC1, ILC2 and ILR1～ILR4 to separate with negative electrode with driven organic light emission pixel; Make the driven organic light emission pixel (for example driven organic light emission pixel 810～830) on every sweep trace negative electrode not with other sweep traces on the negative electrode of driven organic light emission pixel directly electrically conduct the situation that is short-circuited with the driven organic light emission pixel that prevents driven organic light emission pixel cathode potential and other row on each column scan line.
It is the partial circuit figure of the formed organic electroluminescence display panel of driven organic light emission pixel according to Fig. 5 of the present invention that Fig. 9 illustrates.Please refer to Fig. 9, the transistor M1 of each the driven organic light emission pixel 910～990 in the organic electroluminescence display panel 900, M2, M3, M5, M6, the first predetermined voltage V
DDAnd other interelement electric property couplings close and signal situation all similar in appearance to the driven organic light emission pixel 500 of Fig. 5 in transistor M1, M2, M3, M5, M6, the first predetermined voltage V
DDAnd other interelement electric property couplings close and signal situation.Transistor M41～M43 is configurable outside organic light emission pixel 910～990 in addition; And transistor M41 is that 910,920,930 of driven organic light emission pixels are shared; Transistor M42 is that 940,950,960 of driven organic light emission pixels are shared; 970,980,990 of transistor M43 driven organic light emission pixels are shared again, in addition, keep voltage V
SusAlso be that 910～990 of driven organic light emission pixels are shared.Simultaneously, the second predetermined voltage V
SSCan be electrically coupled to the secondary signal in-out end of transistor M41～M43 and configurable outside organic light emission pixel 910～990, this all makes the aperture opening ratio of each driven organic light emission pixel 910～990 in this organic electroluminescence display panel 900 increase.
In addition, it utilizes for example each transistorized on off state of 910～990 in the organic light emission pixel of multi-strip scanning line Scan_N, Scan_N+1, Scan_N+2 may command.And; The signal of sweep trace Scan_N-1 and sweep trace Scan_N inputs in driven organic light emission pixel 910,920 and 930; Sweep trace Scan_N and Scan_N+1 input in driven organic light emission pixel 940,950 and 960 again, and sweep trace Scan_N+1 and Scan_N+2 input in the driven organic light emission pixel 970,980,990.In addition; Data line Data_N supply data is given with the driven organic light emission pixel 910,940,970 in the delegation; Data line Data_N+1 supply data is given with the driven organic light emission pixel 920,950,980 in the delegation, and the Data_N+2 supply data is given with the driven organic light emission pixel 930,960,990 in the delegation.
It is the partial circuit figure of the present invention according to the formed organic electroluminescence display panel of driven organic light emission pixel of Fig. 3 B that Figure 10 illustrates.Please refer to Figure 10, in the present embodiment, the transistor M1～M6 of each the driven organic light emission pixel 1010～1090 on the organic electroluminescence display panel 1000, the first predetermined voltage V
DD, the second predetermined voltage V
SSAnd other interelement electric property couplings close and signal situation all similar in appearance to the driven organic light emission pixel 300 of Fig. 3 B in transistor M1～M6 first predetermined voltage V
DD, the second predetermined voltage V
SSAnd other interelement electric property couplings close and signal situation.In addition, keep voltage Vsus also for pressing 1010～1090 of driving organic light emission pixels shared, so that the aperture opening ratio of each driven organic light emission pixel 1010～1090 in this organic electroluminescence display panel 1000 increases.
In addition, it utilizes for example each transistorized on off state of 1010～1090 in the organic light emission pixel of multi-strip scanning line Scan_N, Scan_N+1, Scan_N+2 may command.And; The signal of sweep trace Scan_N-1 and Scan_N inputs in driven organic light emission pixel 1010,1020 and 1030; The signal of sweep trace Scan_N and Scan_N+1 inputs in driven organic light emission pixel 1040,1050 and 1060 again, and the signal of sweep trace Scan_N+1 and Scan_N+2 inputs in the driven organic light emission pixel 1070,1080,1090.In addition; Data line Data_N supply data is given with the driven organic light emission pixel 1010,1040,1070 in the delegation; Data line Data_N+1 supply data is given with the driven organic light emission pixel 1020,1050,1080 in the delegation, and the Data_N+2 supply data is given with the driven organic light emission pixel 1030,1060,1090 in the delegation.
In sum, driven organic light emission pixel of the present invention is lower than V because of the voltage that can guarantee end points b among Fig. 3 B, Fig. 5 and Fig. 6 can be in before each data write
DD-V
ThVoltage potential, and it is shared for a plurality of pixels institute on the panel outward subelement to be pulled to pixel, therefore makes the critical voltage V of each driving transistors in the display panel
ThDifference can be compensated, avoid on the display panel the uneven shortcoming of each pixel intensity to produce and reach.Therefore in addition, driven organic light emission pixel of the present invention also has bigger aperture opening ratio, thereby increases the luminosity of pixel and reduce cost.In addition, the present invention also can avoid showing uneven shortcoming because of the picture that (IR drop) caused that descends of power supply on the panel.
Though the present invention discloses as above with preferred embodiment; Right its is not in order to limiting the present invention, anyly has the knack of this technological personnel, do not breaking away from the spirit and scope of the present invention; When can doing a little change and retouching, so being as the criterion of being defined of protection scope of the present invention claims.
Claims (10)
1. driven organic light emission pixel is characterized in that: comprising:
One Organic Light Emitting Diode has one first end points and one second end points;
One data write circuit is electrically coupled to a data line, and keeps pressure-wire and one first sweep trace, and this data write circuit electrically conducts according to contained its output terminal of one first sweep signal decision of this first sweep trace, and maybe this keeps pressure-wire to this data line;
One electric capacity has first end and second end, and first end of this electric capacity is electrically coupled to the output terminal of this data write circuit;
One the first transistor; Have first, second signal in-out end and a control end; The first signal in-out end of this first transistor is electrically coupled to one first predetermined voltage, and its secondary signal in-out end is electrically coupled to this first end points, and its control end is electrically coupled to second end of this electric capacity;
One transistor seconds; Have first, second signal in-out end and a control end; The first signal in-out end of this transistor seconds is electrically coupled to the control end of this first transistor; Its secondary signal in-out end is electrically coupled to this first end points, and its control end electrically receives this first sweep signal;
One the 3rd transistor; Have first, second signal in-out end and a control end; The 3rd transistorized first signal in-out end and control end are electrically coupled to one second sweep trace, and its secondary signal in-out end is electrically coupled to the first signal in-out end of this transistor seconds; And
Whether one first switch, an end are electrically coupled to this second end points, and the other end is electrically coupled to one second predetermined voltage, and open with decision according to the control of this first sweep signal,
Wherein, this first, second and third transistor is the transistor of same type, and the scanning of this second sweep trace ordering is sitting at before this first sweep trace.
2. driven organic light emission pixel as claimed in claim 1 is characterized in that:
This data write circuit comprises:
Whether one second switch is electrically coupled between this output terminal of keeping pressure-wire and this data write circuit, and open with decision according to this first sweep signal; And
Whether one the 3rd switch is electrically coupled between the output terminal of this data line and this data write circuit, and open with decision according to this first sweep signal,
Wherein, the opening time of this second switch and the 3rd switch is not overlapping.
3. driven organic light emission pixel as claimed in claim 2 is characterized in that:
This first switch comprises one the 4th transistor; The 4th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this second end points; Control end receives this first sweep signal, and its secondary signal in-out end is electrically coupled to this second predetermined voltage;
This second switch comprises one the 5th transistor; The 5th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this and keeps pressure-wire; Control end receives this first sweep signal, and its secondary signal in-out end is electrically coupled to the output terminal of this data write circuit; And
The 3rd switch comprises one the 6th transistor; The 6th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this data line; The secondary signal in-out end is electrically coupled to the output terminal of this data write circuit, and its control end receives this first sweep signal;
Wherein, this first transistor of the 6th transistor AND gate is the transistor of homotype, and the 4th, the 5th this first transistor of transistor AND gate is veriform transistor.
4. driven organic light emission pixel as claimed in claim 1, it is characterized in that: this data write circuit comprises:
One second switch is electrically coupled between this output terminal of keeping pressure-wire and this data write circuit, and whether an inversion signal of reception and this first sweep signal anti-phase is opened with decision; And
Whether one the 3rd switch is electrically coupled between the output terminal of this data line and this data write circuit, and open with decision according to this first sweep signal,
Wherein, the opening time of this second switch and the 3rd switch is not overlapping.
5. driven organic light emission pixel as claimed in claim 4 is characterized in that:
This first switch comprises one the 4th transistor; The 4th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this second end points, and control end receives this inversion signal, and its secondary signal in-out end is electrically coupled to this second predetermined voltage;
This second switch comprises one the 5th transistor; The 5th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this and keeps pressure-wire; Control end receives this inversion signal, and its secondary signal in-out end is electrically coupled to the output terminal of this data write circuit; And
The 3rd switch comprises one the 6th transistor; The 6th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this data line; The secondary signal in-out end is electrically coupled to the output terminal of this data write circuit, and its control end receives this first sweep signal
Wherein, the 4th, the 5th and the 6th this first transistor of transistor AND gate transistor that is homotype.
6. whether an organic electroluminescence display panel utilizes a plurality of organic light emission pixels of multi-strip scanning line traffic control to open, and it is characterized in that:
Arbitrary organic light emission pixel comprises:
One Organic Light Emitting Diode has one first end points and one second end points;
One data write circuit; Have a plurality of input ends and an output terminal; Those input ends are electrically coupled to a data line, respectively and keep pressure-wire and one first sweep trace; This data write circuit is according to one first contained on this first sweep trace sweep signal, and maybe this keeps pressure-wire to this data line to determine to electrically conduct its output terminal;
One electric capacity has first end and second end, and first end of this electric capacity is electrically coupled to the output terminal of this data write circuit;
One the first transistor; Have first, second signal in-out end and a control end; The first signal in-out end of this first transistor is electrically coupled to one first predetermined voltage, and its secondary signal in-out end is electrically coupled to this first end points, and its control end is electrically coupled to second end of this electric capacity;
One transistor seconds; Have first, second signal in-out end and a control end; The first signal in-out end of this transistor seconds is electrically coupled to the control end of this first transistor, and its secondary signal in-out end is electrically coupled to this first end points, and its control end receives this first sweep signal; And
One the 3rd transistor; Have first, second signal in-out end and a control end; The 3rd transistorized first signal in-out end and control end are electrically coupled to one second sweep trace, and its secondary signal in-out end is electrically coupled to the first signal in-out end of this transistor seconds; And
One first switch has first end and second end, and second end is electrically coupled to one second predetermined voltage, and this first switch determines whether opening electrical path according to this first sweep signal,
Wherein, this first, second and third transistor is the transistor of same type, and the scanning of this second sweep trace ordering is sitting at before this first sweep trace,
Wherein, maybe this is kept in those organic light emission pixels of pressure-wire to this data line to determine electrically conducting its output terminal according to this first sweep signal, has at least two organic light emission pixels to state first end that second end points is coupled to this first switch before.
7. organic electroluminescence display panel as claimed in claim 6 is characterized in that:
This data write circuit comprises:
Whether one second switch is electrically coupled between this output terminal of keeping pressure-wire and this data write circuit, and open with decision according to this first sweep signal; And
Whether one the 3rd switch is electrically coupled between the output terminal of this data line and this data write circuit, and open with decision according to this first sweep signal,
Wherein, the opening time of this second switch and the 3rd switch is not overlapping.
8. organic electroluminescence display panel as claimed in claim 7 is characterized in that:
This first switch comprises one the 4th transistor; The 4th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this second end points; Control end receives this first sweep signal, and its secondary signal in-out end is electrically coupled to this second predetermined voltage;
This second switch comprises one the 5th transistor; The 5th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this and keeps pressure-wire; Control end receives this first sweep signal, and its secondary signal in-out end is electrically coupled to the output terminal of this data write circuit; And
The 3rd switch comprises one the 6th transistor; The 6th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this data line; The secondary signal in-out end is electrically coupled to the output terminal of this data write circuit, and its control end receives this first sweep signal;
Wherein, this first transistor of the 6th transistor AND gate is the transistor of homotype, and the 4th, the 5th this first transistor of transistor AND gate is veriform transistor.
9. organic electroluminescence display panel as claimed in claim 6 is characterized in that;
This data write circuit comprises:
One second switch is electrically coupled between this output terminal of keeping pressure-wire and this data write circuit, and according to whether opening with decision with an inversion signal of this first sweep signal anti-phase; And
Whether one the 3rd switch is electrically coupled between the output terminal of this data line and this data write circuit, and open with decision according to this first sweep signal,
Wherein, the opening time of this second switch and the 3rd switch is not overlapping.
10. organic electroluminescence display panel as claimed in claim 9 is characterized in that:
This first switch comprises one the 4th transistor; The 4th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this second end points, and control end receives this inversion signal, and its secondary signal in-out end is electrically coupled to this second predetermined voltage;
This second switch comprises one the 5th transistor; The 5th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this and keeps pressure-wire; Control end receives this inversion signal, and its secondary signal in-out end is electrically coupled to the output terminal of this data write circuit; And
The 3rd switch comprises one the 6th transistor; The 6th transistor has first, second signal in-out end and a control end; Its first signal in-out end is electrically coupled to this data line; The secondary signal in-out end is electrically coupled to the output terminal of this data write circuit, and its control end electrically receives this first sweep signal
Wherein, the 4th, the 5th and the 6th this first transistor of transistor AND gate transistor that is homotype.
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| CN101615429B (en) * | 2009-07-29 | 2012-02-29 | 友达光电股份有限公司 | Shift register circuit with bi-directional transmission mechanism |
| CN102842277B (en) * | 2011-06-22 | 2015-05-20 | 群创光电股份有限公司 | Displaying device with compensation function |
| CN102654975B (en) * | 2011-11-01 | 2014-08-20 | 京东方科技集团股份有限公司 | AMOLED (active matrix/organic light emitting diode) drive compensation circuit and method and display device thereof |
| CN102708793B (en) * | 2012-02-27 | 2014-02-19 | 京东方科技集团股份有限公司 | Pixel unit driving circuit and method as well as pixel unit |
| KR101341797B1 (en) * | 2012-08-01 | 2013-12-16 | 엘지디스플레이 주식회사 | Organic light emitting diode display device and method for driving the same |
| CN104036725B (en) | 2014-05-29 | 2017-10-03 | 京东方科技集团股份有限公司 | Image element circuit and its driving method, organic electroluminescence display panel and display device |
| US11170715B2 (en) | 2016-11-18 | 2021-11-09 | Boe Technology Group Co., Ltd. | Pixel circuit, display panel, display device and driving method |
| TWI634540B (en) * | 2017-12-13 | 2018-09-01 | 友達光電股份有限公司 | Pixel circuit |
| CN108399894A (en) | 2018-03-28 | 2018-08-14 | 京东方科技集团股份有限公司 | A kind of pixel circuit and its driving method, display device |
| CN108735152B (en) * | 2018-05-28 | 2019-12-24 | 昆山国显光电有限公司 | Driving circuit, pixel circuit, driving method thereof and display device |
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