CN106952613A - The driving method of OLED pixel circuit, display device and OLED pixel circuit - Google Patents
The driving method of OLED pixel circuit, display device and OLED pixel circuit Download PDFInfo
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- CN106952613A CN106952613A CN201710387719.9A CN201710387719A CN106952613A CN 106952613 A CN106952613 A CN 106952613A CN 201710387719 A CN201710387719 A CN 201710387719A CN 106952613 A CN106952613 A CN 106952613A
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
A kind of OLED pixel circuit of present invention description, comprising:The first transistor, transistor seconds, third transistor, the 4th transistor, the 5th transistor, the 6th transistor, storage capacitance and luminescent device, wherein, second pole of the first transistor and the second pole of the transistor seconds are electrically connected to first node, second pole of the third transistor and the storage capacitance are electrically connected to Section Point, and the first pole of the 4th transistor and the second pole of the 5th transistor are electrically connected to the 3rd node;The grid of 6th transistor electrically connects the 4th signal end, the first pole electrical connection low level signal of the 6th transistor, the grid of the second pole electrical connection the 5th transistor of the 6th transistor;The storage capacitance is electrically connected between the Section Point and the 3rd node;The negative electrode electrical connection second source voltage of the organic luminescent device.Improve the suspension joint of driving transistor, improve organic luminescent device stability and contrast.
Description
Technical field
Display device the present invention relates to OLED pixel circuit, comprising the OLED pixel circuit and this is driven to have
The driving method of machine light emitting pixel circuit.
Background technology
With rapidly improving for Display Technique, also flown therewith as the semiconductor component technology of display device core
The progress of jump property.For existing display device, Organic Light Emitting Diode (Organic Light Emitting
Diode, OLED) as a kind of current mode luminescent device, because of its self-luminous, quick response, wide viewing angle and it can make
On flexible substrates the features such as and be applied to more and more among high-performance display field.Then as the urgency of Display Technique
Speed is progressive, and people are to the effect requirements of display device also more and more higher, such as high-contrast, high stability, low-power consumption etc..
Fig. 1 and Fig. 2 are refer to, Fig. 1 is a kind of existing OLED pixel circuit driving principle figure, and Fig. 2 is that Fig. 1 is organic
The timing diagram of light emitting pixel circuit drive method.The first transistor M1, transistor seconds M2, third transistor are included in Fig. 1
M3, the 4th transistor M4 and the 5th transistor M5 and storage capacitance Cst.
In glow phase, transistor seconds M2, the 4th transistor M4, the 5th transistor M5 conductings, organic luminescent device hair
Light;
In the P1 stages:The first transistor M1, transistor seconds M2, third transistor M3, the 5th transistor M5 are closed, and the 4th
Transistor M4 is turned on, and storage capacitance Cst disconnects, and light cut-off;
In the P2 stages:The first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M5 are closed, and the 4th
Transistor M4 is opened, and data signal end Vdata voltage becomes high voltage;
In the P3 stages:The first transistor M1, third transistor M3, the 4th transistor M4 conductings, transistor seconds M2 are closed,
N1 node voltages become V0, and N2 node voltages become Vdata high voltages;
In the P4 stages:The first transistor M1, third transistor M3 are turned on, transistor seconds M2, the 4th transistor M4, the 5th
Transistor M5 is closed, and now carries out the compensation of threshold voltage and the write-in of data-signal, and N3 node voltages become V0-Vth;
In the P5 stages:The first transistor is to the 5th transistor contract fully, and N1 node voltages become V0, and N2 nodes become
Vdata high voltages, N3 nodes become V0-Vth;
In the P6 stages:The first transistor to the 5th transistor contract fully, Vdata voltages becomes low level;
In the P7 stages:Transistor seconds M2 and the 5th transistor M5 conductings, the first transistor M1, third transistor M3, the
Five transistor M5 are closed, and N1 node voltages become Vdata high level;Repeat glow phase afterwards, lighted.
Inventor is simulated to above-mentioned organic light emissive pixels drive circuit and emulated, it is found that existing organic light emissive pixels drive
Dynamic circuit and work schedule have following problem:
1. to data-signal high level, reset compensated stage is being carried out, organic luminescent device anode tap has voltage, and this
Individual voltage has fluctuation, and this has had a strong impact on the stability of display effect, also easily produces scintillation.
2. carrying out reset compensated stage to low level to data-signal.The anode tap of organic luminescent device has voltage, this
The dark-state of display panel can be influenceed, dark-state not enough dark phenomenon is easily caused, so as to reduce the contrast of display panel.
3. in the P3 stages, transistor seconds M2 is closed, and other transistors are all turned on, compensation and the data of threshold voltage are carried out
The write-in of signal, but path is formd in this stage organic luminescent device, cause organic luminescent device to light.
4. in P1, P2, P5 and P6 stage, because the first transistor M1 and transistor seconds M2 is turned off, first node N1
Voltage it is unknown, suspension joint occurs in the 5th transistor M5 grid, this had a strong impact on the 5th transistor M5 service behaviour with
And stability.It should be noted that so-called suspension joint problem refer to transistor grid electrical connection between the two nodes, when this two
When the voltage of individual node is unknown, cause the grid voltage unknown.
The content of the invention
In view of this, a kind of OLED pixel circuit of present invention offer, display device and OLED pixel circuit
Driving method.
In a first aspect, the embodiment of the present invention provides a kind of OLED pixel circuit, comprising:
The first transistor, transistor seconds, third transistor, the 4th transistor, the 5th transistor, the 6th transistor, deposit
Storing up electricity is held and luminescent device, wherein, the second pole of the first transistor and the second pole electrical connection of the transistor seconds
In first node, the second pole of the third transistor and the storage capacitance are electrically connected to Section Point, the 4th crystal
First pole of pipe and the second pole of the 5th transistor are electrically connected to the 3rd node;
The grid of the first transistor electrically connects the first signal end, the first pole electrical connection first of the first transistor
Voltage, the second pole of the first transistor electrically connects the second pole of transistor seconds;
The grid electrical connection secondary signal end of the transistor seconds, the first pole electrical connection of the transistor seconds is described
Second pole of third transistor;
The grid of the third transistor electrically connects the first signal end, the first pole electrical connection data of the third transistor
Signal end;
The grid of 4th transistor electrically connects the 3rd signal end, the first pole electrical connection the 5th of the 4th transistor
Second pole of transistor, the second pole of the 4th transistor electrically connects the anode of the organic luminescent device;
5th transistor is driving transistor, and the grid of the 5th transistor electrically connects the first node, institute
The first pole for stating the 5th transistor electrically connects the first supply voltage;
The grid of 6th transistor electrically connects the 4th signal end, and the first pole of the 6th transistor electrically connects low electricity
Ordinary mail number, the second pole of the 6th transistor electrically connects the grid of the 5th transistor;
The storage capacitance is electrically connected between the Section Point and the 3rd node;
The negative electrode electrical connection second source voltage of the organic luminescent device.
Second aspect, the embodiment of the present invention also provides a kind of display device, includes the organic light emission picture described in first aspect
Plain circuit.
The third aspect, the embodiment of the present invention is also provided with the driving method of machine light emitting pixel circuit, driving appeal first party
OLED pixel circuit described in face.
Brief description of the drawings
Fig. 1 is a kind of existing OLED pixel circuit schematic diagram;
Fig. 2 is a kind of driving method timing diagram of existing OLED pixel circuit in Fig. 1;
Fig. 3 is a kind of OLED pixel circuit schematic diagram provided in an embodiment of the present invention;
Fig. 4 is another OLED pixel circuit schematic diagram provided in an embodiment of the present invention;
Fig. 5 is another OLED pixel circuit schematic diagram provided in an embodiment of the present invention;
Fig. 6 is another OLED pixel circuit schematic diagram provided in an embodiment of the present invention;
Fig. 7 is another OLED pixel circuit schematic diagram provided in an embodiment of the present invention;
Fig. 8 is a kind of driving method timing diagram of OLED pixel circuit provided in an embodiment of the present invention;
Fig. 9 is the driving method timing diagram of another OLED pixel circuit provided in an embodiment of the present invention;
Figure 10 is the driving method timing diagram of another OLED pixel circuit provided in an embodiment of the present invention;
Figure 11 is a kind of organic light-emitting display device schematic diagram provided in an embodiment of the present invention.
Embodiment
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with accompanying drawing and implementation
The present invention will be further described for example.However, example embodiment can be implemented in a variety of forms, and it is not understood as limited to
Embodiment set forth herein;On the contrary, these embodiments are provided so that the present invention more comprehensively and completely, and by example embodiment party
The design of formula comprehensively conveys to those skilled in the art.Identical reference represents same or similar knot in figure
Structure, thus repetition thereof will be omitted.It is described in the present invention expression position and direction word, be using accompanying drawing as
The explanation that example is carried out, but can also make a change as needed, make change and be all contained in the scope of the present invention.The present invention
Accompanying drawing be only used for illustrate relative position relation, the thickness at some positions employs the plotting mode lavished praise on oneself in order to understand, attached
Thickness in figure does not represent the proportionate relationship of actual thickness.
It should be noted that elaborating detail in the following description to fully understand the present invention.But this hair
Bright to be different from other manner described here with a variety of and be implemented, those skilled in the art can be without prejudice in the present invention
Similar popularization is done in the case of culvert.Therefore the present invention is not limited by following public embodiment.Such as in specification and
Some vocabulary have been used to censure specific components among claim.Those skilled in the art are, it is to be appreciated that hardware manufacturer can
Same component can be called with different nouns.This specification and claims are not used as differentiation group with the difference of title
The mode of part, but it is used as the criterion of differentiation with the difference of component functionally.Such as work as in specification in the whole text and claim
Mentioned in "comprising" be an open language, therefore " include but be not limited to " should be construed to.Specification subsequent descriptions are real
The better embodiment of the application is applied, so the description is for the purpose of the rule for illustrating the application, to be not limited to
Scope of the present application.The protection domain of the application is worked as to be defined depending on the appended claims person of defining.
It should be noted that elaborating detail in the following description to fully understand the present invention.But this hair
Bright to be different from other manner described here with a variety of and be implemented, those skilled in the art can be without prejudice in the present invention
Similar popularization is done in the case of culvert.Therefore the present invention is not limited by following public embodiment.
Fig. 3 is refer to, Fig. 3 is a kind of OLED pixel circuit schematic diagram provided in an embodiment of the present invention, organic hair
Light pixel circuit includes the first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M4, the 5th transistor
M5, the 6th transistor M6, storage capacitance Cst and luminescent device oled, wherein, the first transistor M1 the second pole and the second crystalline substance
Body pipe M2 the second pole is electrically connected to first node N1, and third transistor M3 the second pole and storage capacitance Cst are electrically connected to
Two node N2, the 4th transistor M4 the first pole and the 5th transistor M5 the second pole are electrically connected to the 3rd node N3;
The first transistor M1 grid electrically connects the first signal end G1, the first transistor M1 electricity of the first pole electrical connection first
Press V0, the first transistor M1 the second pole electrical connection transistor seconds M2 the second pole;
Transistor seconds M2 grid electrical connection secondary signal end G2, transistor seconds M2 the first pole electrical connection the 3rd are brilliant
Body pipe M3 the second pole;
Third transistor M3 grid electrically connects the first signal end G1, third transistor M3 the first pole electrical connection data letter
Number end Vdata;
4th transistor M4 grid electrically connects the 3rd signal end G3, and the 4th transistor M4 the first pole electrical connection the 5th is brilliant
Body pipe M5 the second pole, the 4th transistor M4 the second pole electrical connection organic luminescent device oled anode;
5th transistor M5 is driving transistor, the 5th transistor M5 grid electrical connection first node N1, the 5th crystal
Pipe M5 the first pole electrically connects the first supply voltage PVDD;
6th transistor M6 grid electrically connects the 4th signal end G4, the 6th transistor M6 the first pole electrical connection low level
Signal, the 6th transistor M6 the second pole electrically connects the 5th transistor M5 grid;
Storage capacitance Cst is electrically connected between Section Point N2 and the 3rd node N3;
The negative electrode electrical connection second source voltage PVEE of the organic luminescent device.
The embodiment of the present invention between the first transistor M1 the second pole and the 5th transistor M5 grid by setting
Six transistors, and the 6th transistor M6 the first pole connection low level signal, in the first transistor M1 and transistor seconds M2 all
When closing, the 6th transistor M6 conductings, low level signal is transferred to the 5th transistor M5 grid by the 6th transistor M6
Pole, the 5th transistor is closed, and makes the grid of the 5th transistor not suspension joint, so as to ensure that the current potential shape of the grid of the 5th transistor
State is stable, it is ensured that the service behaviour and stability of the 5th transistor.
Alternatively, Fig. 4 is refer to, Fig. 4 is another OLED pixel circuit schematic diagram provided in an embodiment of the present invention,
Here is omitted for the something in common of embodiment illustrated in fig. 4 and previous embodiment, only description difference part, specifically, first
The 7th transistor M7 can also be set between transistor M1 the second pole and the 6th transistor M6 the second pole, wherein, the 7th is brilliant
Body M7 grid electrically connects the 5th signal end G5, and the 7th crystal M7 the first pole electrically connects the second pole of the first transistor, the 7th
Crystal M7 the second pole electrically connects the 6th transistor M6 the second pole.The embodiment of the present invention passes through the second of the first transistor M1
7th transistor M7 is set between pole and the 6th transistor M6 the second pole, when data-signal writes, transistor seconds M2, the
Seven transistor M7 are closed, the first transistor M1, third transistor M3, the 4th transistor M4, the 6th transistor M6 conductings, the first electricity
Pressure V0 is transmitted to first node N1, and data signal end Vdata high voltage signals are transmitted to Section Point N2.With prior art phase
Than, in the stage, the 7th transistor M7 is closed, and first node N1 current potential will not be transferred to the 5th transistor M5, meanwhile, the 6th
Transistor M6 is turned on, and low level signal is transferred to the 5th transistor M5 grid, the 5th transistor M5 by the 6th transistor M6
It is not turned on, leakage current will not be produced, so that the stability for not interfering with display device is not dark enough with dark-state, contrast is not high enough
Situation.And the problem of the 5th transistor M5 grid is not in suspension joint.
In the embodiment of the present invention, the 6th transistor M6 the first pole electrical connection second voltage VGL, the low level signal is by the
Two voltage VGL are provided.Alternatively, Fig. 5 is refer to, Fig. 5 is another OLED pixel circuit provided in an embodiment of the present invention
Schematic diagram.Here is omitted for the something in common of embodiment illustrated in fig. 5 and previous embodiment, only description difference part, specifically,
In embodiments of the present invention, the first of the 6th transistor M6 can also extremely electrically connect secondary signal end G2, the low level signal by
Secondary signal end G2 is provided.
Alternatively, Fig. 6 is refer to, Fig. 6 is another OLED pixel circuit schematic diagram provided in an embodiment of the present invention,
Here is omitted for the something in common of embodiment illustrated in fig. 6 and previous embodiment, only description difference part, specifically, of the invention
Embodiment can also include the 8th transistor M8, and the 8th transistor M8 grid electrically connects the 6th signal end G6, the 8th transistor
M8 the first pole electrical connection reference voltage Vref, the 8th transistor M8 the second pole electrically connects the 4th transistor M4 the first pole.
When the first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M4 and the 5th transistor M5 are closed, the
Six transistor M6 and the 8th transistor M8 conductings, low level signal is transmitted to the grid of the 5th transistor, and reference voltage leads to
Cross the 8th transistor to transmit to the 3rd node, reset anode potential.Also, when transistor seconds M2, the 4th transistor M4, the
When six transistor M6 are closed, the first transistor M1, third transistor M3, the 5th transistor M5 and the 8th transistor M8 conductings, number
According to signal end Vdata data signal transmission to Section Point N2, first voltage V0 is transmitted to first node N1, carries out data letter
Number pre-write, compared with prior art, in data-signal pre-write, the 4th transistor is closed, so as to will not make organic light emission
Device causes path, the problem of not interfering with the stability and not dark enough dark-state of display panel.
Alternatively, Fig. 7 is refer to, Fig. 7 is another OLED pixel circuit schematic diagram provided in an embodiment of the present invention.
Here is omitted for the something in common of embodiment illustrated in fig. 7 and previous embodiment, only description difference part, specifically, of the invention
In embodiment, the 9th transistor M9 can also be included, the 9th transistor M9 grid electrically connects the 6th signal end G6, the 9th crystal
Pipe M9 the first pole electrical connection reference voltage Vref, the 9th transistor M9 the second pole electrically connects the second of the 4th transistor M4
Pole.The embodiment of the present invention is given by setting the 9th transistor M9 between the anode and reference voltage Vref of organic luminescent device
One resetting voltage of anode, it is ensured that do not worked completely resetting compensated stage organic luminescent device oled, reduce organic luminescent device
Oled dark-state, improves the contrast of display panel.
It should be noted that in the embodiment of the present invention, the first transistor M1, transistor seconds M2, third transistor M3,
Four transistor M4, the 5th transistor M5 and the 6th transistor M6 are all P-type transistor or are all N-type transistor.
The embodiment of the present invention also provides a kind of driving method of OLED pixel circuit.Alternatively, Fig. 3 and figure be refer to
8, Fig. 3 be a kind of OLED pixel circuit schematic diagram provided in an embodiment of the present invention, and Fig. 8 is provided in an embodiment of the present invention one
Plant the driving method timing diagram of OLED pixel circuit.The driving method is included:
First stage P1, the first transistor M1, transistor seconds M2, third transistor M3, the 5th transistor M5 are closed, the
Four transistor M4 and the 6th transistor M6 conductings, storage capacitance Cst is floating state, and low level signal passes through the 6th transistor M6
The 5th transistor M5 grid is transferred to, the 5th transistor M5 is closed, and the current potential of anode is discharged by the 4th transistor M4,
Organic luminescent device stops luminous, anode reset;
Second stage P2, the first transistor M1, transistor seconds M2, third transistor M3, the 5th transistor M5 are closed, the
Four transistor M4 and the 6th transistor M6 conductings, give data signal end Vdata high voltage signals, are that standard is done in data-signal write-in
It is standby;
Phase III P3, transistor seconds M2, the 6th transistor M6 are closed, the first transistor M1, third transistor M3, the
Four transistor M4 are turned on, and first voltage V0 is transmitted to first node N1, data signal end Vdata data signal transmissions to second section
Point N2, carries out the pre-write of data-signal;
Fourth stage P4:Transistor seconds M2, the 4th transistor M4, the 5th transistor M5, the 6th transistor M6 are closed, the
One transistor M1, third transistor M3 are turned on, and the 3rd node N3 voltages subtract threshold voltage vt h for first voltage V0, carry out threshold
Value complement repays the write-in with data-signal;
5th stage P5:The first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M4, the 5th crystalline substance
Body pipe M5 is closed, the 6th transistor M6 conductings, and the 3rd node N3 voltages subtract threshold voltage vt h for first voltage V0;
6th stage P6:The first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M4, the 5th crystalline substance
Body pipe M5 is closed, the 6th transistor M6 conductings, gives data signal end low voltage signal, resets data signal end Vdata current potentials;
7th stage P7:The first transistor M1, third transistor M3, the 4th transistor M4, the 6th transistor M6 are closed, the
Two-transistor M2 and the 5th transistor M5 conductings, storage capacitance Cst electric discharges, data-signal is transmitted to institute by transistor seconds M2
State first node N1.
Glow phase Emit:The first transistor M1, third transistor M3, the 6th transistor M6 are closed, transistor seconds M2,
4th transistor M4, the 5th transistor M5 are turned on, and the data-signal of storage capacitance Cst storages is transferred to by transistor seconds M2
5th transistor M5 grid, the 5th transistor M5 electric current driving organic luminescent device oled lights.The embodiment of the present invention is led to
Cross the 6th transistor of setting between the second pole in the first transistor M1 and the 5th transistor M5 grid, and the 6th transistor M6
The first pole connection low level signal, in the first stage, second stage, the 5th stage, the 6th stage, the first transistor M1 and the
Two-transistor M2 is closed, and the 6th transistor M6 conductings, low level signal is transferred to the 5th transistor by the 6th transistor M6
M5 grid, the 5th transistor is closed, and makes the grid of the 5th transistor not suspension joint, so that ensure that the grid of the 5th transistor
Potential state is stable, it is ensured that the service behaviour and stability of the 5th transistor.
Alternatively, in the embodiment of the present invention, the 6th transistor M6 the first pole electrical connection second voltage VGL, the low level
Signal is provided by second voltage VGL.In other embodiments, the first of the 6th transistor M6 can also extremely electrically connect secondary signal
G2 is held, the low level signal is provided by secondary signal end G2.
Alternatively, in the embodiment of the present invention, the first transistor M1, transistor seconds M2, third transistor M3, the 4th crystal
Pipe M4, the 5th transistor M5, the 6th transistor M6 are all P-type transistor or are all N-type transistor;
When the first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M4, the 5th transistor M5,
When six transistor M6 are all N-type transistor, during to the first signal end G1 high level voltages, the first transistor M1, third transistor
M3 is turned on, during to the first signal end G1 low level voltages, and the first transistor M1, third transistor M3 are closed;
During to secondary signal end G2 high level voltages, secondary signal end G2 low level voltages are given in transistor seconds M2 conductings
When, transistor seconds M2 is closed;
During to the 3rd signal end G3 high level voltages, the 4th transistor is led M4 and led to, to the 3rd signal end G3 low level voltages
When, the 4th transistor M4 is closed;
During to the 4th signal end G4 high level voltages, the 6th transistor M6 conductings, to the 4th signal end G4 low level voltages
When, the 6th transistor M6 is closed.
Fig. 4 and Fig. 9 are refer to, Fig. 4 is another OLED pixel circuit schematic diagram provided in an embodiment of the present invention, figure
9 be the driving method timing diagram of another OLED pixel circuit provided in an embodiment of the present invention.The driving method include with
Next stage:
First stage P1:The first transistor M1, transistor seconds M2, third transistor M3, the 5th transistor M5, the 7th crystalline substance
Body pipe M7 is closed, the 4th transistor M4 and the 6th transistor M6 conductings, and storage capacitance Cst is floating state, and low level signal leads to
The grid that the 6th transistor M6 is transferred to the 5th transistor M5 is crossed, the 5th transistor M5 is closed, and the 3rd node N3 current potential passes through
4th transistor M4 is discharged, and organic luminescent device oled stops luminous, anode reset;
Second stage P2:The first transistor M1, transistor seconds M2, third transistor M3, the 5th transistor M5, the 7th crystalline substance
Body pipe M7 is closed, the 4th transistor M4 and the 6th transistor M6 conductings, is given data signal end Vdata high voltage signals, is data
Signal write-in is prepared;
Phase III P3:Transistor seconds M2, the 7th transistor M7 are closed, the first transistor M1, third transistor M3, the
Four transistor M4, the 6th transistor M6 are turned on, and first voltage V0 is transmitted to first node N1, data signal end Vdata data letter
Number transmit the pre-write that data-signal is carried out to Section Point N2;
Fourth stage P4:Transistor seconds M2, the 4th transistor M4, the 6th transistor M6 are closed, the first transistor M1, the
Three transistor M3, the 5th transistor M5, the 7th transistor M7 conductings, carry out the compensation of threshold voltage and the write-in of data-signal,
3rd node N3 voltage subtracts threshold voltage vt h for first voltage V0;
5th stage P5:The first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M4, the 5th crystalline substance
Body pipe M5 is closed, and the 6th transistor M6 and the 7th transistor M7 conductings, first voltage V0 are transmitted to first node N1, storage capacitance
The voltage at Cst two ends is transferred to Section Point N2 and the 3rd node N3 respectively, and the voltage for making Section Point N2 is data voltage, the
Three node N3 voltage subtracts threshold voltage vt h for first voltage V0;
6th stage P6:The first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M4, the 5th crystalline substance
Body pipe M5 is closed, the 6th transistor M6 and the 7th transistor M7 conductings, is given data signal end low voltage signal, is made data signal end
Current potential resets.
7th stage P7:The first transistor M1, third transistor M3, the 4th transistor M4, the 6th transistor M6 are closed, the
Two-transistor M2, the 5th transistor M5, the 7th transistor M7 conductings, storage capacitance Cst electric discharges, data-signal pass through the second crystal
Pipe M2 is transmitted to first node;
Glow phase Emit:The first transistor M1, third transistor M3, the 6th transistor M6 are closed, transistor seconds M2,
4th transistor M4, the 5th transistor M5, the 7th transistor M7 conductings, the data-signal of storage capacitance Cst storages pass through second
Transistor M2 is transferred to the 5th transistor M5 grid, and the 5th transistor M5 electric current driving organic luminescent device oled lights.
The embodiment of the present invention between the first transistor M1 the second pole and the 6th transistor M6 the second pole by setting the 7th crystal
Pipe M7, in the phase III, transistor seconds M2, the 7th transistor M7 are closed, the first transistor M1, third transistor M3, the 4th
Transistor M4, the 6th transistor M6 are turned on, and first voltage V0 is transmitted to first node N1, data signal end Vdata high voltages letter
Number transmit to Section Point N2.Compared with prior art, in the stage, the 7th transistor M7 is closed, first node N1 current potential
The 5th transistor M5 will not be transferred to, meanwhile, the 6th transistor M6 conductings, low level signal is transferred to by the 6th transistor M6
5th transistor M5 grid, the 5th transistor M5 is not turned on, and will not produce leakage current, so as to not interfere with the steady of display device
It is qualitative not dark enough with dark-state, the not high enough situation of contrast.And the problem of the 5th transistor M5 grid is not in suspension joint.
In the embodiment of the present invention, the 6th transistor M6 the first pole electrical connection second voltage VGL, the low level signal is by second voltage
VGL is provided.In other embodiments, the first of the 6th transistor M6 can also extremely electrically connect secondary signal end G2, the low level
Signal is provided by secondary signal end G2.
Alternatively, Fig. 6 and Figure 10 are refer to, Fig. 4 is another OLED pixel circuit provided in an embodiment of the present invention
Schematic diagram, Figure 10 is the driving method timing diagram of another OLED pixel circuit provided in an embodiment of the present invention.The driving
Method was included with the next stage:
First stage:The first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M4 and the 5th are brilliant
Body pipe M5 is closed, and the 6th transistor M6 and the 8th transistor M8 conductings, low level signal are transmitted to the 5th transistor M5 grid,
Reference voltage Vref is transmitted to the 3rd node N3 by the 8th transistor M8, and anode resets;
Second stage:M1 the first transistors, transistor seconds M2, third transistor M3, the 4th transistor M4 and the 5th are brilliant
Body pipe M5 is closed, and the 6th transistor M6 and the 8th transistor M8 conductings, low level signal are transmitted to the 5th transistor M5 grid,
Reference voltage Vref is transmitted to the 3rd node N3 by the 8th transistor M8, and anode resets, and data signal end Vdata is to high electricity
Pressure, is that the write-in of data-signal is prepared.
Phase III:Transistor seconds M2, the 4th transistor M4, the 6th transistor M6 are closed, the first transistor M1, the 3rd
Transistor M3, the 5th transistor M5 and the 8th transistor M8 conducting, the data signal transmission of data signal end to Section Point N2,
First voltage V0 is transmitted to first node N1, carries out data-signal pre-write;
Fourth stage:Transistor seconds M2, the 4th transistor M4, the 5th transistor M5, the 6th transistor M6 and the 8th are brilliant
Body pipe M8 is closed, the first transistor M1 and third transistor M3 conductings, the data signal transmission of data signal end to Section Point
N2, first voltage V0 transmit the write-in that data-signal is carried out to first node N1 and valve value compensation;
5th stage:The first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M4, the 5th crystal
Pipe M5 and the 8th transistor M8 is closed, and the 6th transistor M6 conductings, the 3rd node N3 voltages subtract threshold value electricity for first voltage V0
Press Vth;
6th stage:The first transistor M1, transistor seconds M2, third transistor M3, the 4th transistor M4, the 5th crystal
Pipe M5 and the 8th transistor M8 is closed, the 6th transistor M6 conductings, is given data signal end low voltage signal, is made data signal end
Vdata current potentials reset;
7th stage:The first transistor M1, third transistor M3, the 4th transistor M4, the 6th transistor M6 and the 8th are brilliant
Body M8 is closed, and transistor seconds M2 and the 5th transistor M5 conductings, storage capacitance Cst electric discharges, data-signal pass through the second crystal
Pipe M2 is transmitted to first node N1, turns on the 5th transistor M5.
Glow phase:The first transistor M1, third transistor M3, the 6th transistor M6 and the 8th transistor M8 are closed, the
Two-transistor M2, the 4th transistor M4, the 5th transistor M5 conductings, the data-signal of storage capacitance Cst storages are brilliant by second
Body pipe M2 is transferred to the 5th transistor M5 grid, and the 5th transistor M5 electric current driving organic luminescent device oled lights.This
In inventive embodiments, the 8th transistor M8 is set so that in the first stage and second stage, the first transistor M1, the second crystal
When pipe M2, third transistor M3, the 4th transistor M4 and the 5th transistor M5 closings, the 6th transistor M6 and the 8th transistor M8
Conducting, low level signal is transmitted to the grid of the 5th transistor, and reference voltage is transmitted to Section three by the 8th transistor
Point, resets anode potential.Also, in the phase III, when transistor seconds M2, the 4th transistor M4, the 6th transistor M6 are closed
When closing, the first transistor M1, third transistor M3, the 5th transistor M5 and the 8th transistor M8 conductings, data signal end Vdata
Data signal transmission to Section Point N2, first voltage V0 is transmitted to first node N1, carries out data-signal pre-write, and existing
There is technology to compare, in data-signal pre-write, the 4th transistor is closed, so that organic luminescent device will not be made to cause path,
Not the problem of not interfering with the stability and not dark enough dark-state of display panel.
Alternatively, the 9th transistor M9 can also be included, the 9th transistor M9 grid electrically connects the 6th signal end M6, the
Nine transistor M9 the first pole electrical connection reference voltage Vref, the 9th transistor M9 the second pole electrically connects the 4th transistor M4's
Second pole, wherein, the 9th transistor M9 is N-type transistor or is P-type transistor, when the 9th transistor M9 is N-type transistor
When, driving method can also be included:
In the first stage, second stage, phase III, to the 6th signal end G6 high level signals, the 9th transistor M9 is led
It is logical, in fourth stage, the 5th stage, the 6th stage, the 7th stage and glow phase, give the 6th signal end G6 low levels letter
Number, the 9th transistor M9 is closed, in the first stage, second stage and phase III, and the 9th transistor is given anode resetting voltage, made
Organic luminescent device does not light in reset compensated stage.
The embodiment of the present invention also provides a kind of display device, the organic light emissive pixels electricity comprising above-mentioned any one embodiment
Road.Figure 11 is refer to, Figure 11 is a kind of display device provided in an embodiment of the present invention.The display device includes organic light emitting display
Device, the organic light-emitting display device can include cell phone, panel computer or wrist-watch.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (17)
1. a kind of OLED pixel circuit, it is characterised in that include:
The first transistor, transistor seconds, third transistor, the 4th transistor, the 5th transistor, the 6th transistor, storage electricity
Hold and luminescent device, wherein, the second pole of the first transistor and the second pole of the transistor seconds are electrically connected to the
One node, the second pole of the third transistor and the storage capacitance are electrically connected to Section Point, the 4th transistor
First pole and the second pole of the 5th transistor are electrically connected to the 3rd node;
The grid of the first transistor electrically connects the first signal end, the electricity of the first pole electrical connection first of the first transistor
Pressure, the second pole of the first transistor electrically connects the second pole of transistor seconds;
The grid electrical connection secondary signal end of the transistor seconds, the first pole electrical connection the described 3rd of the transistor seconds
Second pole of transistor;
The grid of the third transistor electrically connects the first signal end, the first pole electrical connection data-signal of the third transistor
End;
The grid of 4th transistor electrically connects the 3rd signal end, and the first pole of the 4th transistor electrically connects the 5th crystal
Second pole of pipe, the second pole of the 4th transistor electrically connects the anode of the organic luminescent device;
5th transistor is driving transistor, and the grid of the 5th transistor electrically connects the first node, described the
First pole of five transistors electrically connects the first supply voltage;
The grid of 6th transistor electrically connects the 4th signal end, the first pole electrical connection low level letter of the 6th transistor
Number, the second pole of the 6th transistor electrically connects the grid of the 5th transistor;
The storage capacitance is electrically connected between the Section Point and the 3rd node;
The negative electrode electrical connection second source voltage of the organic luminescent device.
2. OLED pixel circuit according to claim 1, it is characterised in that in the second pole of the first transistor
The 7th transistor is also electrically connected between the second pole of the 6th transistor, wherein, the grid of the 7th crystal is electrically connected
The 5th signal end is connect, the first pole of the 7th transistor electrically connects the second pole of the first transistor, the 7th crystal
Second pole of pipe electrically connects the second pole of the 6th transistor.
3. OLED pixel circuit according to claim 1, it is characterised in that also comprising the 8th transistor, described
The grid of eight transistors electrically connects the 6th signal end, the first pole electrical connection reference voltage of the 8th transistor, the described 8th
Second pole of transistor electrically connects the first pole of the 4th transistor.
4. OLED pixel circuit according to claim 3, it is characterised in that also including the 9th transistor, described
The grid of nine transistors electrically connects the 6th signal end, and the first pole of the 9th transistor electrically connects the reference voltage,
Second pole of the 9th transistor electrically connects the second pole of the 4th transistor.
5. the OLED pixel circuit according to claim 1-4 any one, it is characterised in that the 6th transistor
The first pole electrical connection second voltage, the low level signal provides by the second voltage.
6. the OLED pixel circuit according to claim 1-4 any one, it is characterised in that the 6th transistor
The first pole electrical connection secondary signal end, the low level signal provides by the secondary signal end.
7. OLED pixel circuit according to claim 1, it is characterised in that the first transistor, described second
It is brilliant that transistor, the third transistor, the 4th transistor, the 5th transistor and the 6th transistor are all p-type
Body pipe is all N-type transistor.
8. a kind of display device, it is characterised in that include the OLED pixel circuit described in claim 1-7 any one.
9. a kind of driving method of OLED pixel circuit, it is characterised in that the organic light emission picture described in driving claim 1
The method of plain circuit, the driving method is included:
First stage, the first transistor, the transistor seconds, the third transistor, the 5th transistor are closed,
4th transistor and the 6th transistor turns, the storage capacitance are floating state, and the low level signal passes through
6th transistor is transferred to the grid of the 5th transistor, and the 5th transistor is closed, and the current potential of the anode leads to
Cross the 4th transistor to discharge, the organic luminescent device stops luminous, the anode reset;
Second stage, the first transistor, the transistor seconds, the third transistor, the 5th transistor are closed,
4th transistor and the 6th transistor turns, are data-signal write-in to the data signal end high voltage signal
Prepare;
Phase III, the transistor seconds, the 6th transistor close, the first transistor, the third transistor,
4th transistor turns, the first voltage is transmitted to the first node, the data signal end data signal transmission
To the Section Point, the pre-write of data-signal is carried out;
Fourth stage:The transistor seconds, the 4th transistor, the 5th transistor, the 6th transistor are closed,
The first transistor, third transistor conducting, the 3rd node voltage subtract threshold voltage for the first voltage,
Carry out the write-in of valve value compensation and data-signal;
5th stage:It is the first transistor, the transistor seconds, the third transistor, the 4th transistor, described
5th transistor is closed, the 6th transistor turns, and the 3rd node voltage subtracts threshold voltage for the first voltage;
6th stage:It is the first transistor, the transistor seconds, the third transistor, the 4th transistor, described
5th transistor is closed, the 6th transistor turns, to the data signal end low voltage signal, makes the data signal end
Current potential resets;
7th stage:The first transistor, the third transistor, the 4th transistor, the 6th transistor are closed,
The transistor seconds and the 5th transistor turns, the storage capacitance electric discharge, the data-signal pass through described second
Transistor is transmitted to the first node.
Glow phase:The first transistor, the third transistor, the 6th transistor are closed, the transistor seconds,
4th transistor, the 5th transistor turns, the data-signal of the storage capacitance storage pass through second crystal
Pipe is transferred to the grid of the 5th transistor, and the electric current of the 5th transistor drives the organic luminescent device to light.
10. the driving method of OLED pixel circuit according to claim 9, it is characterised in that the first crystal
Pipe, the transistor seconds, the third transistor, the 4th transistor, the 5th transistor, the 6th transistor
It is all P-type transistor or is all N-type transistor;
When the first transistor, the transistor seconds, the third transistor, the 4th transistor, the 5th crystalline substance
When body pipe, the 6th transistor are all N-type transistor,
During to the first signal end high level voltage, the first transistor, third transistor conducting, to described first
During signal end low level voltage, the first transistor, the third transistor are closed;
During to the secondary signal end high level voltage, secondary signal end low level electricity is given in the transistor seconds conducting
During pressure, the transistor seconds is closed;
During to the 3rd signal end high level voltage, the 4th crystal conducting, to the 3rd signal end low level voltage
When, the 4th transistor is closed;
During to the 4th signal end high level voltage, the 6th transistor turns give the 4th signal end low level electricity
During pressure, the 6th transistor is closed.
11. a kind of driving method of OLED pixel circuit, it is characterised in that the organic light emission described in driving claim 2
The method of image element circuit, the driving method is included:
First stage:It is the first transistor, the transistor seconds, the third transistor, the 5th transistor, described
7th transistor is closed, the 4th transistor and the 6th transistor turns, and the storage capacitance is floating state, described
Low level signal is transferred to the grid of the 5th transistor by the 6th transistor, and the 5th transistor is closed, institute
The current potential for stating the 3rd node is discharged by the 4th transistor, and organic luminescent device stops luminous, the anode reset;
Second stage:It is the first transistor, the transistor seconds, the third transistor, the 5th transistor, described
7th transistor is closed, the 4th transistor and the 6th transistor turns, to the data signal end high voltage signal,
Prepared for data-signal write-in;
Phase III:The transistor seconds, the 7th transistor close, the first transistor, the third transistor,
4th transistor, the 6th transistor turns, the first voltage are transmitted to the first node, the data-signal
End data signal transmission carries out the pre-write of data-signal to the Section Point;
Fourth stage:The transistor seconds, the 4th transistor, the 6th transistor are closed, the first transistor,
The third transistor, the 5th transistor, the 7th transistor turns, carry out compensation and the data-signal of threshold voltage
Write-in, the voltage of the 3rd node subtracts the threshold voltage for the first voltage;
5th stage:It is the first transistor, the transistor seconds, the third transistor, the 4th transistor, described
5th transistor is closed, and first voltage described in the 6th transistor and the 7th transistor turns is transmitted to the first segment
Point, the voltage at the storage capacitance two ends is transferred to the Section Point and the 3rd node respectively, makes the Section Point
Voltage is voltage data signal, and the 3rd node voltage subtracts the threshold voltage for the first voltage;
6th stage:It is the first transistor, the transistor seconds, the third transistor, the 4th transistor, described
5th transistor is closed, the 6th transistor and the 7th transistor turns, to the data signal end low voltage signal,
Reset data-signal terminal potential.
7th stage:The first transistor, the third transistor, the 4th transistor, the 6th transistor are closed,
The transistor seconds, the 5th transistor, the 7th transistor turns, the storage capacitance electric discharge, the data letter
Number transmitted by the transistor seconds to the first node;
Glow phase:The first transistor, the third transistor, the 6th transistor are closed, the transistor seconds,
4th transistor, the 5th transistor, the 7th transistor turns, the data-signal of the storage capacitance storage lead to
The grid that the transistor seconds is transferred to the 5th transistor is crossed, the electric current of the 5th transistor drives organic hair
Optical device lights.
12. the driving method of OLED pixel circuit according to claim 11, it is characterised in that the first crystal
Pipe, the transistor seconds, the third transistor, the 4th transistor, the 5th transistor, the 6th transistor
P-type transistor is all with the 7th transistor or is all N-type transistor;
When the first transistor, the transistor seconds, the third transistor, the 4th transistor, the 5th crystalline substance
When body pipe, the 6th transistor and the described 7th are all N-type transistor,
During to the first signal end high level voltage, the first transistor, third transistor conducting, to described first
During signal end low level voltage, the first transistor, the third transistor are closed;
During to the secondary signal end high level voltage, secondary signal end low level electricity is given in the transistor seconds conducting
During pressure, the transistor seconds is closed;
During to the 3rd signal end high level voltage, the 4th crystal conducting, to the 3rd signal end low level voltage
When, the 4th crystal is closed;
During to the 4th signal end high level voltage, the 6th crystal conducting, to the 4th signal end low level voltage
When, the 6th crystal is closed;
During to the 5th signal end high level, the 7th transistor turns, during to the 5th signal low level signal, institute
State the closing of the 7th transistor.
13. the driving method of the OLED pixel circuit according to claim 11 or 12, it is characterised in that the described 6th
First pole of transistor electrically connects the secondary signal end, and the low level signal is provided by the secondary signal end.
14. the driving method of the OLED pixel circuit according to claim 11 or 12, it is characterised in that the described 6th
The first pole electrical connection second voltage of transistor, the low level signal is provided by the second voltage.
15. a kind of driving method of OLED pixel circuit, it is characterised in that the organic light emission described in driving claim 3
Image element circuit, the driving method is included:
First stage:The first transistor, the transistor seconds, the third transistor, the 4th transistor and institute
The closing of the 5th transistor, the 6th transistor and the 8th transistor turns are stated, the low level signal is transmitted to described
The grid of 5th transistor, the reference voltage is transmitted to the 3rd node by the 8th transistor, and the anode is answered
Position;
Second stage:The first transistor, the transistor seconds, the third transistor, the 4th transistor and institute
The closing of the 5th transistor, the 6th transistor and the 8th transistor turns are stated, the low level signal is transmitted to described
The grid of 5th transistor, the reference voltage is transmitted to the 3rd node by the 8th transistor, and the anode is answered
Position, the data signal end, to high voltage, is that the write-in of data-signal is prepared;
Phase III:The transistor seconds, the 4th transistor, the 6th transistor are closed, the first transistor,
The third transistor, the 5th transistor and the 8th transistor turns, the data-signal of the data signal end are passed
The Section Point is transported to, the first voltage is transmitted to the first node, carries out data-signal pre-write;
Fourth stage:The transistor seconds, the 4th transistor, the 5th transistor, the 6th transistor and institute
State the closing of the 8th transistor, the first transistor and third transistor conducting, the data-signal of the data signal end
Transmit to the Section Point, the first voltage transmits the write-in that data-signal is carried out to the first node and threshold value is mended
Repay;
5th stage:It is the first transistor, the transistor seconds, the third transistor, the 4th transistor, described
5th transistor and the 8th transistor are closed, the 6th transistor turns, and the 3rd node voltage is described first
Voltage subtracts threshold voltage;
6th stage:It is the first transistor, the transistor seconds, the third transistor, the 4th transistor, described
5th transistor and the 8th transistor are closed, the 6th transistor turns, to the data signal end low voltage signal,
Reset the data-signal terminal potential;
7th stage:The first transistor, the third transistor, the 4th transistor, the 6th transistor and institute
State the closing of the 8th crystal, the transistor seconds and the 5th transistor turns, the storage capacitance electric discharge, the data letter
Number transmitted by the transistor seconds to the first node, make the 5th transistor turns;
Glow phase:The first transistor, the third transistor, the 6th transistor and the 8th transistor are closed
Close, the transistor seconds, the 4th transistor, the 5th transistor turns, the data letter of the storage capacitance storage
Number it is transferred to the grid of the 5th transistor by the transistor seconds, has described in the electric current driving of the 5th transistor
Machine luminescent device lights.
16. according to the driving method of the OLED pixel circuit described in claim 15, it is characterised in that the first crystal
Pipe, the transistor seconds, the third transistor, the 4th transistor, the 5th transistor, the 6th transistor
P-type transistor is all with the 8th transistor or is all N-type transistor;
When the first transistor, the transistor seconds, the third transistor, the 4th transistor, the 5th crystalline substance
When body pipe, the 6th transistor and the 8th transistor are all N-type transistor,
During to the first signal end high level voltage, the first transistor, third transistor conducting, to described first
During signal end low level voltage, the first transistor, the third transistor are closed;
During to the secondary signal end high level voltage, secondary signal end low level electricity is given in the transistor seconds conducting
During pressure, the transistor seconds is closed;
During to the 3rd signal end high level voltage, the 4th crystal conducting, to the 3rd signal end low level voltage
When, the 4th transistor is closed;
During to the 4th signal end high level voltage, the 6th transistor turns give the 4th signal end low level electricity
During pressure, the 6th transistor is closed;
During to the 6th signal end high level voltage, the 8th transistor turns give the 6th signal end low level electricity
During pressure, the 8th transistor is closed.
17. the driving method of OLED pixel circuit according to claim 16, it is characterised in that also brilliant including the 9th
Body pipe, the grid of the 9th transistor electrically connects the 6th signal end, the first pole electrical connection ginseng of the 9th transistor
Voltage is examined, the second pole of the 9th transistor electrically connects the second pole of the 4th transistor, wherein, the 9th crystal is
N-type transistor is P-type transistor, and when the 9th transistor is N-type transistor, the driving method is also included:
It is described to the 6th signal end high level signal in the first stage, the second stage, the phase III
9th transistor turns, in the fourth stage, the 5th stage, the 6th stage, the 7th stage and described
Glow phase, to the 6th signal end low level signal, the 9th transistor is closed, in the first stage, described the
Two-stage and the phase III, the 9th transistor give the anode resetting voltage, make the organic luminescent device multiple
Position compensated stage does not light.
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CN111951715A (en) * | 2019-04-30 | 2020-11-17 | 上海和辉光电有限公司 | Pixel circuit, driving method and display |
CN111951715B (en) * | 2019-04-30 | 2024-03-29 | 上海和辉光电股份有限公司 | Pixel circuit, driving method and display |
CN111445850A (en) * | 2020-04-30 | 2020-07-24 | 京东方科技集团股份有限公司 | Pixel circuit and driving method thereof, display device and driving method thereof |
US11948499B2 (en) | 2022-01-11 | 2024-04-02 | AUO Corporation | Driving circuit and driving method |
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