CN102930819A - Display and driving method thereof - Google Patents
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- CN102930819A CN102930819A CN2011102297856A CN201110229785A CN102930819A CN 102930819 A CN102930819 A CN 102930819A CN 2011102297856 A CN2011102297856 A CN 2011102297856A CN 201110229785 A CN201110229785 A CN 201110229785A CN 102930819 A CN102930819 A CN 102930819A
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Abstract
A display comprises a plurality of organic light emitting diode pixels. Each organic light emitting diode pixel comprises an organic light emitting diode, a driving transistor, a switch transistor, a first compensating block and a second compensating block, wherein each driving transistor is provided with a first end coupled to an anode end of the corresponding organic light emitting diode, a second end for receiving a work voltage and a control end for receiving a data voltage; each switch transistor is provided with a first end coupled to a control end of the corresponding driving transistor, a second end for receiving a data voltage and a control end for receiving a first control signal; each first compensating block is coupled to the first end and the control end of the corresponding driving transistor; and each second compensating block is coupled to the first end of the corresponding driving transistor and receives the corresponding first control signal and the corresponding data voltage.
Description
[technical field]
The invention relates to a kind of display and driving method thereof.
[background technology]
Please refer to Fig. 1, it illustrates the circuit diagram of traditional active-matrix Organic Light Emitting Diode (active matrix organic light emitting diode, AMOLED) picture element.Driving transistors MOS_dri in the AMOLED picture element 10 is that N-type drives pattern, and it mostly uses amorphous silicon (a-Si) and indium gallium zinc oxide (IGZO) backplane technology.Although the critical voltage of amorphous silicon and indium gallium zinc oxide transistor component has the uniform characteristic of initial height, yet it still can produce deteriorated (degradation) and can't keep output and prima facies electric current together at assembly operation after a period of time, cause display brightness inhomogeneous (mura) or other problem.
In addition, the negative electrode of OLED 12 in the AMOLED picture element 10 is to possess the transparency but the higher indium tin oxide (ITO) of work function, so in the assembly processing procedure, need work function that separate procedure processes to reduce ITO to obtain the OLED assembly of tool reliability and better characteristic, improved the complexity of whole manufacturing process.
[summary of the invention]
This exposure relates to a kind of display and driving method thereof, by the critical voltage compensation mechanism so that each Organic Light Emitting Diode of display (organic light emitting diode, OLED) picture element identical current value of output and can not increase and not decay along with the time in the situation of identical data input.
According to the first aspect of this exposure, a kind of display is proposed, comprise a panel.Panel comprises a plurality of Organic Light Emitting Diode picture elements, and each Organic Light Emitting Diode picture element comprises an Organic Light Emitting Diode, a driving transistors, a switching transistor, one first compensation block and one second compensation block.Driving transistors have a first end with the anode tap that is coupled to Organic Light Emitting Diode, one second end with receive an operating voltage, and a control end to receive a data voltage.Switching transistor have a first end with the control end that is coupled to driving transistors, one second end with receive data voltage, and a control end to receive one first control signal.The first compensation block is coupled to first end and the control end of driving transistors.The second compensation block is coupled to the first end of driving transistors, and receives the first control signal and data voltage.
According to the second aspect of this exposure, a kind of driving method of display is proposed, display comprises a panel.Panel comprises a plurality of Organic Light Emitting Diode picture elements, and each Organic Light Emitting Diode picture element comprises an Organic Light Emitting Diode, a driving transistors, a switching transistor, one first compensation block and one second compensation block.Driving transistors have a first end with the anode tap that is coupled to Organic Light Emitting Diode, one second end with receive an operating voltage, and a control end to receive a data voltage.Switching transistor have a first end with the control end that is coupled to driving transistors, one second end with receive data voltage, and a control end to receive one first control signal.The first compensation block is coupled to first end and the control end of driving transistors.The second compensation block is coupled to the first end of driving transistors, and receives the first control signal and data voltage.The driving method of display comprises the following steps.In a reset phase, the first compensation block of resetting is so that the first compensation block has a reference voltage and data voltage, and the first control signal is by switching transistor and the second compensation block cut-off driving transistors.In a compensated stage, the current potential of the first end of driving transistors is coupled to a low level voltage to the second compensation block so that the driving transistors suspension joint is opened again discharge cut-off, and the first compensation block keeps the voltage of first end of the driving transistors after the cut-off and a voltage difference and the data voltage of reference voltage.In a glow phase, the conducting Organic Light Emitting Diode, so that the voltage of the first end of driving transistors is a driving voltage, the control end that the first compensation block is fed back to driving transistors with voltage difference and the driving voltage of the voltage of the first end of reference voltage in the compensated stage and driving transistors.
According to the third aspect of this exposure, a kind of display is proposed, comprise a panel.Panel comprises a plurality of Organic Light Emitting Diode picture elements, and each Organic Light Emitting Diode picture element comprises an Organic Light Emitting Diode, a driving transistors, a switching transistor, one first compensation block and one second compensation block.Driving transistors have a first end with the anode tap that is coupled to Organic Light Emitting Diode, one second end with receive an operating voltage, and a control end to receive a data voltage.Switching transistor have a first end with the control end that is coupled to driving transistors, one second end with receive data voltage, and a control end to receive one first control signal.The first compensation block is coupled to the second end and the control end of driving transistors.The second compensation block is coupled to the second end of driving transistors, and receives the first control signal and data voltage.
For the above-mentioned of this exposure and other aspect are had better understanding, an embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
[description of drawings]
Fig. 1 illustrates the circuit diagram of traditional active-matrix Organic Light Emitting Diode picture element.
Fig. 2 illustrates the circuit diagram according to the OLED picture element of one first embodiment.
Fig. 3 illustrates the driving sequential chart according to the OLED picture element of the first embodiment.
Fig. 4 illustrates the circuit diagram according to the OLED picture element of one second embodiment.
Fig. 5 illustrates the circuit diagram according to the OLED picture element of one the 3rd embodiment.
Fig. 6 illustrates the driving sequential chart according to the OLED picture element of the 3rd embodiment.
Fig. 7 illustrates the circuit diagram according to the OLED picture element of one the 4th embodiment.
Fig. 8 illustrates the circuit diagram according to the OLED picture element of one the 5th embodiment.
[primary clustering symbol description]
The 10:AMOLED picture element
12、210、710、810：OLED
200,300,700,800:OLED picture element
220,720,820: the first compensation blocks
230,330,730,830: the second compensation blocks
[embodiment]
The display that this exposure proposes and driving method thereof, by the critical voltage compensation mechanism so that each Organic Light Emitting Diode of display (organic light emitting diode, OLED) picture element identical current value of output and can not increase and not decay along with the time in the situation of identical data input.
Display comprises a panel, a gate drive unit and one source pole utmost point driver element.Panel comprises a plurality of Organic Light Emitting Diode picture elements.The gate drive unit is in order to these a little Organic Light Emitting Diode picture elements of activation.Source electrode utmost point driver element is in order to drive this a little Organic Light Emitting Diode picture elements.Next hereby explain as an example of the N-type MOS transistor example, so be not limited to this, can also use P type MOS transistor or BJT transistor, look closely the actual design demand and decide.Please refer to Fig. 2, it illustrates the circuit diagram according to the OLED picture element of one first embodiment.OLED picture element 200 comprises an OLED 210, a driven MOS transistor MOS_dri, a switch mos transistor MOS_sw, one first compensation block 220 and one second compensation block 230.Driven MOS transistor MOS_dri have a first end (node S) with the anode tap that is coupled to OLED 210, one second end with receive an operating voltage ELVDD, and a control end (node G) to receive a data voltage Data.Switch mos transistor MOS_sw have a first end with the control end that is coupled to driven MOS transistor MOS_dri, one second end with receive data voltage Data, and a control end to receive one first control signal Sn.
The first compensation block 220 is coupled to first end and the control end of driven MOS transistor MOS_dri.The second compensation block 230 is coupled to the first end of driven MOS transistor MOS_dri, and receives the first control signal Sn and data voltage Data.In a reset phase, the first compensation block 220 is reset and has reference voltage REF and data voltage Data, and the first control signal Sn is by switch mos transistor MOS_sw and the second compensation block 230 cut-off driven MOS transistor MOS_dri.
In a compensated stage, the current potential of the first end of driven MOS transistor MOS_dri is coupled to a low level voltage to the second compensation block 230 so that driven MOS transistor MOS_dri suspension joint is opened (floating on) cut-off of discharge again, the voltage of the first end of the driven MOS transistor MOS_dri after 220 reservations of the first compensation block end and a voltage difference and the data voltage Data of reference voltage REF.In a glow phase, the first compensation block 220 conducting driven MOS transistor MOS_dri are with driving OLED 210, and the voltage difference of keeping the voltage of the first end of reference voltage and driven MOS transistor MOS_dri in the compensated stage is fed back to the control end of the driven MOS transistor MOS_dri after the conducting with the voltage with the first end of the driven MOS transistor MOS_dri after the conducting.
In Fig. 2, the second compensation block 230 comprises one first MOS transistor T1, the first MOS transistor T1 have a first end with the first end that is coupled to driven MOS transistor MOS_dri, one second end with receive data voltage Data, and a control end to receive the first control signal Sn.The first compensation block 220 comprises one second MOS transistor T2, one second capacitor C 2, one the 3rd capacitor C 3 and one the 3rd MOS transistor T3.The second MOS transistor T2 has a first end to receive a reference voltage REF, to reach a control end to receive one first enable signal En.Wherein, the accurate position of reference voltage REF is higher than the accurate position of data voltage Data.
The second capacitor C 2 have a first end (node A) with one second end that is coupled to the second MOS transistor T2, and one second end to be coupled to the first end of driven MOS transistor MOS_dri.The 3rd capacitor C 3 have a first end with the second end of being coupled to the second MOS transistor T2, and one second end to be coupled to the control end of driven MOS transistor MOS_dri.The 3rd MOS transistor T3 have a first end with the first end that is coupled to the 3rd capacitor C 3, one second end with the second end of being coupled to the 3rd capacitor C 3, and a control end receive one second enable signal XEn or one second control signal Sn '.
Please refer to Fig. 3, it illustrates the driving sequential chart according to the OLED picture element of the first embodiment.In reset phase t1, the first enable signal En conducting the second MOS transistor T2, node A is refitted in reference voltage REF; The first control signal Sn actuating switch MOS transistor MOS_sw and the first MOS transistor T1, so that data voltage Data is pacified ingress G and node S, driven MOS transistor MOS_dri is cut off.At this moment, the cathode voltage ELVSS that receives of the cathode terminal of OLED 210 is rocked to a noble potential with cut-off OLED 210.In addition, by Fig. 2 and Fig. 3 as can be known, in reset phase, so OLED picture element 200 does not exist current path can not cause meaningless power consumption, when being applied to the large scale display device, also can not produce power voltage drop (IR drop).
In compensated stage t2, the first control signal Sn cutoff switch MOS transistor MOS_sw, the current potential of node G is maintained at data voltage Data, and the current potential of node A is maintained at reference voltage REF.The first control signal Sn ends the first MOS transistor T1 and is rocked to the cathode voltage ELVSS cut-off OLED 210 of noble potential, the current potential of node S will be coupled to low level voltage V (s) by the stray capacitance Cgs1 of the first MOS transistor T1, this low level voltage can obtain in formula (1) estimation, and wherein Cp is the relevant shunt capacitance of node S.
V(s)＝Data+(Low-High)×(Cgs1/(Cgs1+C2+Cp))(1)
The lock source electrode pressure reduction of driven MOS transistor MOS_dri and the difference of critical voltage can be obtained by formula (2) estimation.
Vgs-Vt＝V(g)-V(s)-Vt
＝Data-{Data+(Low-High)×(Cgs1/(Cgs1+C2+Cp))}-Vt
＝(High-Low)×(Cgs1/(Cgs1+C2+Cp))-Vt(2)
Suppose that Low is-10 volts, High is 10 volts, and Cgs1 and C2 are 0.2pr, and ignore shunt capacitance Cp, and then formula (2) can be reduced to Vgs-Vt=10-Vt.If critical voltage Vt is less than 10 volts, then low level voltage V (s) is so that driven MOS transistor MOS_dri is in the suspension joint opening, and begins to be discharged to cut-off state.At this moment, the current potential of node S is a stopping potential Data-Vt.The voltage difference of node A and node S equals (REF-Data+Vt) and can be kept by the second capacitor C 2.
Compensated stage t2 can be defined by the second enable signal XEn or the second control signal Sn ' in fact.In this exposure, compensated stage t2 separates with data write cycle (reset phase t1),, can not be subject to the make-up time data write cycle (sweep trace opening time) so that can suitably being adjusted, increased the accuracy of compensation, so be more suitable for being applied to large scale and high-resolution display device.
In glow phase t3, the first enable signal En ends the second MOS transistor T2, the second enable signal XEn or the second control signal Sn ' conducting the 3rd MOS transistor T3, node A and node G carry out a charge share (charge sharing) and so that driven MOS transistor MOS_dri be switched on, cathode voltage ELVSS returns back to electronegative potential, the voltage difference (REF-Data+Vt) the when current potential of node S is fed back to node A with maintenance compensated stage t2 by the second capacitor C 2.At this moment, the current potential of node S is Voled, and the current potential of node A is (REF+Voled-Data+Vt), and node G is identical with the current potential of node A.Therefore, the lock source electrode pressure reduction of driven MOS transistor MOS_dri is Vgs=(REF-Data+Vt).The output current I_dri of driven MOS transistor MOS_dri is suc as formula shown in (3), and wherein Kp is 1/2 (μ) (Cox) (W/L), and μ is carrier mobility, and Cox is unit-area capacitance, and W/L is breadth length ratio.
I_dri＝Kp×(Vgs-Vt)
2＝Kp×(REF-Data)
2(3)
From formula (3), can find the output current I_dri of driven MOS transistor MOS_dri and the independent from voltage of critical voltage Vt and OLED 210.That is the OLED picture element 200 of this exposure can compensate the critical voltage variation of driven MOS transistor MOS_dri, the identical current value of output in the situation of identical data input and can not increasing and decay along with the time; Simultaneously, the OLED picture element 200 of this exposure can also compensate the voltage variation of OLED 210, and the output current in the situation of identical data input can not increase with the voltage of OLED210 and change.
Please refer to Fig. 4, it illustrates the circuit diagram according to the OLED picture element of one second embodiment.OLED picture element 300 comprises an OLED 210, a driven MOS transistor MOS_dri, a switch mos transistor MOS_sw, one first compensation block 220 and one second compensation block 330.The circuit structure of OLED picture element 300 and operation principles are similar to OLED picture element 200, and both do not exist together and only are that second of OLED picture element 300 compensates block 330 and more comprises one first capacitor C 1.The first capacitor C 1 have a first end be coupled to driven MOS transistor MOS_dri first end, and one second end be coupled to the control end of the first MOS transistor T1.Wherein, in compensated stage, the first control signal Sn cutoff switch MOS transistor MOS_sw and the first MOS transistor T1, the stray capacitance Cgs1 among the first capacitor C 1 replacement Fig. 2 is coupled to low level voltage V (s) with the current potential of the first end of driven MOS transistor MOS_dri.C1 replaces the Cgs1 in formula (1) and the formula (2), and also supposes that C1 is 0.2pf.The driving sequential of OLED picture element 300 no longer repeats in this as shown in Figure 3.
Please refer to Fig. 5 and Fig. 6, Fig. 5 illustrates the circuit diagram according to the OLED picture element of one the 3rd embodiment, and Fig. 6 illustrates the driving sequential chart according to the OLED picture element of the 3rd embodiment.OLED picture element 500 comprises an OLED 210, a driven MOS transistor MOS_dri, a switch mos transistor MOS_sw, one first compensation block 220, one second compensation block 330 and one the 4th MOS transistor T4.The circuit structure of OLED picture element 500 is similar to OLED picture element 300, both differences are in OLED picture element 500 and more comprise the 4th MOS transistor T4, the 4th MOS transistor T4 have a first end with the anode tap that is coupled to OLED 210, one second end with the first end that is coupled to driven MOS transistor MOS_dri, and a control end to receive the second enable signal XEn.As shown in Figure 6, the usefulness of the 4th MOS transistor T4 is in, and in reset phase t1 and compensated stage t2 OLED 210 and node S is isolated, and is electrically connected OLED 210 and node S in glow phase t3.Thus, cathode voltage ELVSS need not swing and can be maintained at an electronegative potential.In addition, only be controlled by the aperture opening ratio that the second enable signal XEn will help picture element integral body if in OLED picture element 500, limit the 3rd MOS transistor.
In addition, as previously mentioned, this exposure can also be adopted P type MOS transistor.Please refer to Fig. 7, illustrate the circuit diagram according to the OLED picture element of one the 4th embodiment.OLED picture element 700 comprises an OLED 710, a driven MOS transistor MOS_dri, a switch mos transistor MOS_sw, one first compensation block 720, one second compensation block 730 and one the 4th MOS transistor T4.The circuit structure of OLED picture element 700 is similar to OLED picture element 500, and its driving sequential is same as Fig. 6.
In addition, please refer to Fig. 8, it illustrates the circuit diagram according to the OLED picture element of one the 5th embodiment.OLED picture element 800 comprises an OLED 810, a driven MOS transistor MOS_dri, a switch mos transistor MOS_sw, one first compensation block 820, one second compensation block 830 and one the 4th MOS transistor T4.The circuit structure of OLED picture element 800 is similar to OLED picture element 500, and it drives sequential and is same as Fig. 6, and different locating only is that the accurate position of reference voltage REF is lower than the accurate position of data voltage Data.
In addition, this exposure more proposes a kind of driving method of OLED picture element, and the OLED picture element comprises an OLED, a driving transistors, a switching transistor, one first compensation block and one second compensation block.Driving transistors have a first end with the anode tap that is coupled to OLED, one second end with receive an operating voltage, and a control end to receive a data voltage.Switching transistor have a first end with the control end that is coupled to driving transistors, one second end with receive data voltage, and a control end to receive one first control signal.The first compensation block is coupled to first end and the control end of driving transistors.The second compensation block is coupled to the first end of driving transistors, and receives the first control signal and data voltage.
The driving method of OLED picture element comprises the following steps.In a reset phase, the first compensation block of resetting is so that the first compensation block has a reference voltage and data voltage, and the first control signal is by switching transistor and the second compensation block cut-off driving transistors.In a compensated stage, the current potential of the first end of driving transistors is coupled to a low level voltage to the second compensation block so that the driving transistors suspension joint is opened again discharge cut-off, and the first compensation block keeps the voltage of first end of the driving transistors after the cut-off and a voltage difference and the data voltage of reference voltage.In a glow phase, conducting OLED, so that the voltage of the first end of driving transistors is a driving voltage, the control end that the first compensation block is fed back to driving transistors with voltage difference and the driving voltage of the voltage of the first end of reference voltage in the compensated stage and driving transistors.
The principle of operation of the driving method of above-mentioned OLED picture element has been specified in Fig. 2～Fig. 6 and the related content thereof, so no longer repeat in this.
The disclosed display of this exposure above-described embodiment and driving method thereof, the Organic Light Emitting Diode of display (organic light emitting diode, OLED) picture element has the ability of self-sensing critical voltage by the critical voltage compensation mechanism, and be fed back to driving transistors driving voltage and so that each OLED picture element identical current value of output and can not increasing and decay along with the time in the situation of identical data input; Simultaneously, also have the ability of self-sensing OLED voltage by the OLED voltage compensation mechanism, and be fed back to driving transistors driving voltage and so that the output current of each OLED picture element in the situation of identical data input can not increase with OLED voltage change.
In addition, the display of this exposure and driving method thereof for each OLED picture element, so do not exist current path can not cause meaningless power consumption, also can not produce power voltage drop when being applied to the large scale display device in reset phase.Further, in this exposure, compensated stage separates with data write cycle, can be subject to the single scanning line opening time so that the make-up time can suitably adjust, so can reach accurate compensation effect, be more suitable for being applied to large scale and high-resolution display device.
In sum, although the present invention discloses as above with a plurality of embodiment, so it is not to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (20)
1. display comprises:
One panel comprises a plurality of Organic Light Emitting Diode picture elements, and each Organic Light Emitting Diode picture element comprises:
One Organic Light Emitting Diode;
One driving transistors, have a first end with the anode tap that is coupled to this Organic Light Emitting Diode, one second end with receive an operating voltage, and a control end to receive a data voltage;
One switching transistor, have a first end with this control end of being coupled to this driving transistors, one second end with receive this data voltage, and a control end to receive one first control signal;
One first compensates block, is coupled to this first end and this control end of this driving transistors; And
One second compensation block is coupled to this first end of this driving transistors, and receives this first control signal and this data voltage.
2. display according to claim 1 is characterized in that:
In a reset phase, this first compensation block is reset and has a reference voltage and data voltage, and this first control signal is ended this driving transistors by this switching transistor and this second compensation block;
In a compensated stage, this the second compensation block is coupled to a low level voltage with the current potential of this first end of this driving transistors so that this driving transistors suspension joint is opened again discharge cut-off, and this first compensation block keeps the voltage of this first end of this driving transistors after the cut-off and a voltage difference and this data voltage of this reference voltage;
In a glow phase, this Organic Light Emitting Diode is switched on, so that the voltage of this first end of this driving transistors is a driving voltage, this control end that this first compensation block is fed back to this driving transistors with this voltage difference and this driving voltage of the voltage of this first end of this reference voltage and this driving transistors in this compensated stage.
3. display according to claim 2 is characterized in that, this second compensation block comprises:
One the first transistor, have a first end with this first end of being coupled to this driving transistors, one second end with receive this data voltage, and a control end to receive this first control signal;
Wherein, in this reset phase, this this switching transistor of the first control signal conducting and this first transistor so that this driving transistors be cut off;
In this compensated stage, this first control signal is ended this switching transistor and this first transistor, and the current potential of this first end of this driving transistors is coupled to this low level voltage by the stray capacitance of this first transistor.
4. display according to claim 3 is characterized in that, this second compensation block more comprises:
One first electric capacity, have a first end be coupled to this driving transistors this first end, and one second end be coupled to this control end of this first transistor;
Wherein, in this compensated stage, this first control signal is ended this switching transistor and this first transistor, and the current potential of this first end of this driving transistors first is capacitively coupled to this low level voltage by this.
5. display according to claim 2 is characterized in that, this first compensation block comprises:
One transistor seconds has a first end to receive this reference voltage, to reach a control end to receive one first enable signal;
One second electric capacity, have a first end with one second end that is coupled to this transistor seconds, and one second end to be coupled to this first end of this driving transistors;
One the 3rd electric capacity, have a first end with this second end of being coupled to this transistor seconds, and one second end to be coupled to this control end of this driving transistors; And
One the 3rd transistor, have a first end with this first end of being coupled to the 3rd electric capacity, one second end with this second end of being coupled to the 3rd electric capacity, and a control end receive one second enable signal or one second control signal;
Wherein, in this reset phase, this this transistor seconds of the first enable signal conducting, this second enable signal or this second control signal are ended the 3rd transistor, and this first end of this second electric capacity has this reference voltage;
In this compensated stage, this second electric capacity keeps this voltage difference;
In this glow phase, this first enable signal ends this transistor seconds, this second enable signal or this second control signal conducting the 3rd transistor, so that this driving transistors is switched on, the second electric capacity is fed back to this control end of this driving transistors after the conducting with the voltage with this first end of this driving transistors after the conducting by this voltage difference.
6. display according to claim 2 is characterized in that, a cathode terminal of this Organic Light Emitting Diode receives a cathode voltage, and in this reset phase and this compensated stage, this cathode voltage is rocked to a noble potential to end this Organic Light Emitting Diode.
7. display according to claim 2 is characterized in that, a cathode terminal of this Organic Light Emitting Diode receives a fixed negative pole voltage, and this Organic Light Emitting Diode picture element more comprises:
One the 4th transistor, have a first end with this anode tap of being coupled to this Organic Light Emitting Diode, one second end with this first end of being coupled to this driving transistors, and a control end to receive one second enable signal;
Wherein, in this reset phase and this compensated stage, this second enable signal ends the 4th transistor, and in this glow phase, this second enable signal conducting the 4th transistor.
8. the driving method of a display, this display comprises a panel, this panel comprises a plurality of Organic Light Emitting Diode picture elements, each Organic Light Emitting Diode picture element comprises an Organic Light Emitting Diode, one driving transistors, one switching transistor, one first compensation block and one second compensation block, this driving transistors has a first end to be coupled to an anode tap of this Organic Light Emitting Diode, one second end is to receive an operating voltage, and a control end is to receive a data voltage, this switching transistor has a first end to be coupled to this control end of this driving transistors, one second end is to receive this data voltage, and a control end is to receive one first control signal, this the first compensation block is coupled to this first end and this control end of this driving transistors, this the second compensation block is coupled to this first end of this driving transistors, and receive this first control signal and this data voltage, the driving method of this display comprises:
In a reset phase, this first compensation block of resetting is so that this first compensation block has a reference voltage and this data voltage, and this first control signal is ended this driving transistors by this switching transistor and this second compensation block;
In a compensated stage, this the second compensation block is coupled to a low level voltage with the current potential of this first end of this driving transistors so that this driving transistors suspension joint is opened again discharge cut-off, and this first compensation block keeps the voltage of this first end of this driving transistors after the cut-off and a voltage difference and this data voltage of this reference voltage; And
In a glow phase, this Organic Light Emitting Diode of conducting, so that the voltage of this first end of this driving transistors is a driving voltage, this control end that this first compensation block is fed back to this driving transistors with this voltage difference and this driving voltage of the voltage of this first end of this reference voltage and this driving transistors in this compensated stage.
9. the driving method of display according to claim 8, it is characterized in that, this the second compensation block comprises a first transistor, this the first transistor have a first end with this first end of being coupled to this driving transistors, one second end with receive this data voltage, and a control end to receive this first control signal, the driving method of this Organic Light Emitting Diode picture element more comprises:
In this reset phase, this this switching transistor of the first control signal conducting and this first transistor so that this driving transistors be cut off; And
In this compensated stage, this first control signal is ended this switching transistor and this first transistor, and the current potential of this first end of this driving transistors is coupled to this low level voltage by the stray capacitance of this first transistor.
10. the driving method of display according to claim 9, it is characterized in that, this the second compensation block more comprises one first electric capacity, this first electric capacity have a first end be coupled to this driving transistors this first end, and one second end be coupled to this control end of this first transistor, the driving method of this Organic Light Emitting Diode picture element more comprises:
In this compensated stage, this first control signal is ended this switching transistor and this first transistor, and the current potential of this first end of this driving transistors first is capacitively coupled to this low level voltage by this.
11. the driving method of display according to claim 8, it is characterized in that, this the first compensation block comprises a transistor seconds, one second electric capacity, one the 3rd electric capacity and one the 3rd transistor, this transistor seconds has a first end to receive this reference voltage, and a control end is to receive one first enable signal, this second electric capacity has a first end to be coupled to one second end of this transistor seconds, and one second end is to be coupled to this first end of this driving transistors, the 3rd electric capacity has a first end to be coupled to this second end of this transistor seconds, and one second end is to be coupled to this control end of this driving transistors, the 3rd transistor has a first end to be coupled to this first end of the 3rd electric capacity, one second end is to be coupled to this second end of the 3rd electric capacity, reach a control end and receive one second enable signal or one second control signal, the driving method of this Organic Light Emitting Diode picture element more comprises:
In this reset phase, this this transistor seconds of the first enable signal conducting, this second enable signal or this second control signal are ended the 3rd transistor, and this first end of this second electric capacity has this reference voltage;
In this compensated stage, this second electric capacity keeps this voltage difference; And
In this glow phase, this first enable signal ends this transistor seconds, this second enable signal or this second control signal conducting the 3rd transistor, so that this driving transistors is switched on, the second electric capacity is fed back to this control end of this driving transistors after the conducting with the voltage with this first end of this driving transistors after the conducting by this voltage difference.
12. the driving method of display according to claim 8 is characterized in that, a cathode terminal of this Organic Light Emitting Diode receives a cathode voltage, and the driving method of this Organic Light Emitting Diode picture element more comprises:
In this reset phase and this compensated stage, this cathode voltage is rocked to a noble potential to end this Organic Light Emitting Diode.
13. the driving method of display according to claim 8, it is characterized in that, one cathode terminal of this Organic Light Emitting Diode receives a fixed negative pole voltage, this Organic Light Emitting Diode picture element more comprises one the 4th transistor, the 4th transistor have a first end with this anode tap of being coupled to this Organic Light Emitting Diode, one second end with this first end of being coupled to this driving transistors, and a control end to receive one second enable signal, the driving method of this Organic Light Emitting Diode picture element more comprises:
In this reset phase and this compensated stage, this second enable signal ends the 4th transistor; And
In this glow phase, this second enable signal conducting the 4th transistor.
14. a display comprises:
One panel comprises a plurality of Organic Light Emitting Diode picture elements, and each Organic Light Emitting Diode picture element comprises:
One Organic Light Emitting Diode;
One driving transistors, have a first end with the anode tap that is coupled to this Organic Light Emitting Diode, one second end with receive an operating voltage, and a control end to receive a data voltage;
One switching transistor, have a first end with this control end of being coupled to this driving transistors, one second end with receive this data voltage, and a control end to receive one first control signal;
One first compensates block, is coupled to this second end and this control end of this driving transistors; And
One second compensation block is coupled to this second end of this driving transistors, and receives this first control signal and this data voltage.
15. display according to claim 14 is characterized in that:
In a reset phase, this first compensation block is reset and has a reference voltage and data voltage, and this first control signal is ended this driving transistors by this switching transistor and this second compensation block;
In a compensated stage, this the second compensation block is coupled to a low level voltage with the current potential of this second end of this driving transistors so that this driving transistors suspension joint is opened again discharge cut-off, and this first compensation block keeps the voltage of this second end of this driving transistors after the cut-off and a voltage difference and this data voltage of this reference voltage;
In a glow phase, this Organic Light Emitting Diode is switched on, so that the voltage of this of this driving transistors the second end is a driving voltage, this control end that this first compensation block is fed back to this driving transistors with this voltage difference and this driving voltage of the voltage of this second end of this reference voltage and this driving transistors in this compensated stage.
16. display according to claim 15 is characterized in that, this second compensation block comprises:
One the first transistor, have a first end with this second end of being coupled to this driving transistors, one second end with receive this data voltage, and a control end to receive this first control signal;
Wherein, in this reset phase, this this switching transistor of the first control signal conducting and this first transistor so that this driving transistors be cut off;
In this compensated stage, this first control signal is ended this switching transistor and this first transistor, and the current potential of this of this driving transistors the second end is coupled to this low level voltage by the stray capacitance of this first transistor.
17. display according to claim 16 is characterized in that, this second compensation block more comprises:
One first electric capacity, have a first end be coupled to this driving transistors this second end, and one second end be coupled to this control end of this first transistor;
Wherein, in this compensated stage, this first control signal is ended this switching transistor and this first transistor, and the current potential of this of this driving transistors the second end first is capacitively coupled to this low level voltage by this.
18. display according to claim 15 is characterized in that, this first compensation block comprises:
One transistor seconds has a first end to receive this reference voltage, to reach a control end to receive one first enable signal;
One second electric capacity, have a first end with one second end that is coupled to this transistor seconds, and one second end to be coupled to this second end of this driving transistors;
One the 3rd electric capacity, have a first end with this second end of being coupled to this transistor seconds, and one second end to be coupled to this control end of this driving transistors; And
One the 3rd transistor, have a first end with this first end of being coupled to the 3rd electric capacity, one second end with this second end of being coupled to the 3rd electric capacity, and a control end receive one second enable signal or one second control signal;
Wherein, in this reset phase, this this transistor seconds of the first enable signal conducting, this second enable signal or this second control signal are ended the 3rd transistor, and this first end of this second electric capacity has this reference voltage;
In this compensated stage, this second electric capacity keeps this voltage difference;
In this glow phase, this first enable signal ends this transistor seconds, this second enable signal or this second control signal conducting the 3rd transistor, so that this driving transistors is switched on, the second electric capacity is fed back to this control end of this driving transistors after the conducting with the voltage with this second end of this driving transistors after the conducting by this voltage difference.
19. display according to claim 15 is characterized in that, a cathode terminal of this Organic Light Emitting Diode receives a cathode voltage, and in this reset phase and this compensated stage, this cathode voltage is rocked to a noble potential to end this Organic Light Emitting Diode.
20. display according to claim 15 is characterized in that, a cathode terminal of this Organic Light Emitting Diode receives a fixed negative pole voltage, and this Organic Light Emitting Diode picture element more comprises:
One the 4th transistor, have a first end with receive this operating voltage, one second end with this second end of being coupled to this driving transistors, and a control end to receive one second enable signal;
Wherein, in this reset phase and this compensated stage, this second enable signal ends the 4th transistor, and in this glow phase, this second enable signal conducting the 4th transistor.
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Address after: 518100 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 4, building 1, building Applicant after: Qunkang Technology (Shenzhen) Co., Ltd. Applicant after: Innolux Display Group Address before: 518100 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 4, building 1, building Applicant before: Qunkang Technology (Shenzhen) Co., Ltd. Applicant before: Chimei Optoelectronics Co., Ltd. |
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