CN105761664B - Pixel circuit and its driving method and active matrix/organic light emitting display - Google Patents
Pixel circuit and its driving method and active matrix/organic light emitting display Download PDFInfo
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Abstract
In pixel circuit provided by the invention and its driving method and active matrix/organic light emitting display, pass through the first scan control signal line, second scan control signal line and third scan control signal line control the 4th thin film transistor (TFT) respectively, the working condition of 5th thin film transistor (TFT) and the second thin film transistor (TFT), pass through LED control signal line traffic control first film transistor and the working condition of the 6th thin film transistor (TFT) simultaneously, so that the electric current that the third thin film transistor (TFT) as driving element is exported is unrelated with the threshold voltage of the third thin film transistor (TFT), thus, it can be to avoid the brightness disproportionation caused by the threshold voltage deviation as thin film transistor (TFT) using the organic light emitting display of the pixel circuit and its driving method, improve the display quality of image.
Description
Technical field
The present invention relates to technical field of flat panel display, more particularly to a kind of pixel circuit and its driving method and active matrix
Organic light emitting display.
Background technology
Active matrix/organic light emitting display (English full name Active Matrix Organic Lighting
Emitting Display, abbreviation AMOLED) utilize thin film transistor (TFT) (English full name Thin Film Transistor, abbreviation
TFT), collocation capacitance storage signal, to control Organic Light Emitting Diode (English full name Organic Lighting Emitting
Diode, abbreviation OLED) brightness and grayscale performance, so as to show image.Since active matrix/organic light emitting display can be certainly
Row shines, unlike Thin Film Transistor-LCD (English full name Thin Film Transistor liquid crystal
Display, abbreviation TFT-LCD) need back light system (backlight system) that can just light, therefore visibility and brightness are equal
Higher, and it is more frivolous.At present, active matrix/organic light emitting display is known as that Thin Film Transistor-LCD can be replaced
Display of new generation.
It please refers to Fig.1, is the circuit diagram of the pixel of the active matrix/organic light emitting display of the prior art.Such as Fig. 1 institutes
Show, each pixel of active matrix/organic light emitting display includes pixel circuit 10 and Organic Light Emitting Diode OLED, the picture
Plain circuit 10 is connect with data line and scan line Sn, and controls shining for the Organic Light Emitting Diode OLED, wherein, the picture
Plain circuit 10 includes switching thin-film transistor T1, driving thin film transistor (TFT) T2 and storage capacitance Cs, the switching thin-film transistor
The grid of T1 is connect with scan line S (n), and the source electrode of the switching thin-film transistor T1 is connect with data line, the driving film
The grid of transistor T2 is connect with the drain electrode of the switching thin-film transistor T1, and it is thin that the storage capacitance Cs is connected to the driving
Between the grid and source electrode of film transistor T2, for maintaining to provide during the scheduled time to the switching thin-film transistor T1's
The data-signal Vdata of grid and the threshold voltage for driving the thin film transistor (TFT) T2, the source of the driving thin film transistor (TFT) T2
Pole is connect with the first power supply, and the drain electrode of the driving thin film transistor (TFT) T2 and the anode of the Organic Light Emitting Diode OLED connect
It connects, the cathode of the Organic Light Emitting Diode OLED is connect with second source, and the Organic Light Emitting Diode OLED is according to
Pixel circuit 10 provide electric current and shine.
When turning on the switch transistor T1 by scan line S (n), the data voltage Vdata that data line provides is brilliant via switch
Body pipe T1 storages are to storage capacitance Cs, so as to which driving transistor T2 be controlled to generate electric current, driving Organic Light Emitting Diode OLED hairs
Light.At this point, the calculation formula for flowing through the driving transistor T2 the current between the source and the drains Ion is：
Ion=K × and (Vsg2- | Vth |)2
Wherein, K is electron mobility, breadth length ratio, the product of unit-area capacitance three of thin film transistor (TFT), and Vsg2 is driving
Voltage difference between the gate source voltage of transistor T2, i.e. grid and source electrode, Vth are the threshold voltage of driving transistor T2.
Since the gate source voltage Vsg2 of driving transistor T2 is equal to ELVDD-Vdata, the driving transistor is flowed through
T2 the current between the source and the drains Ion can be calculated according to the following formula：
Ion=K × and (ELVDD-Vdata- | Vth |)2
However, current technological level is it is difficult to ensure that the threshold voltage of the driving transistor T2 of each pixel is identical.Therefore,
Even if the supply voltage ELVDD of each pixel is identical with data voltage Vdata, the electricity between driving transistor T2 source electrode and drain electrodes
Stream Ion is as the threshold voltage of driving transistor is different and differs.As the thin film transistor (TFT) of driving element, threshold value
The deviation of voltage can lead to data-signals and identical external power supply of the Organic Light Emitting Diode OLED for same brightness
Still launch the light of different brightness, cause brightness disproportionation, influence display effect.
Base this, how to solve existing active matrix/organic light emitting display and led due to drive transistor threshold voltage deviation
The brightness disproportionation of cause, a technical problem urgently to be resolved hurrily into those skilled in the art.
Invention content
The purpose of the present invention is to provide a kind of pixel circuit and its driving method and active matrix/organic light emitting display,
It is asked with solving existing active matrix/organic light emitting display brightness disproportionation caused by drive transistor threshold voltage deviation
Topic.
To solve the above problems, the present invention provides a kind of pixel circuit, the pixel circuit include first film transistor,
Second thin film transistor (TFT), third thin film transistor (TFT), the 4th thin film transistor (TFT), the 5th thin film transistor (TFT), the 6th thin film transistor (TFT) and
Storage capacitance, wherein：.
First film transistor is connected between first node and the first power supply, and grid is connected to LED control signal
Line；
Second thin film transistor (TFT), is connected between data line and first node, and grid is connected to third scan control letter
Number line；
Third thin film transistor (TFT) is connected between the source electrode of the first power supply and the 6th thin film transistor (TFT), and grid is connected to
Two nodes；
4th thin film transistor (TFT) is connected between second node and third power supply, and grid is connected to the first scan control
Signal wire；
5th thin film transistor (TFT) is connected between the source electrode of second node and the 6th thin film transistor (TFT), and grid is connected to
Second scan control signal line；
6th thin film transistor (TFT) is connected between the drain electrode of the 5th thin film transistor (TFT) and the anode of Organic Light Emitting Diode,
Its grid is connected to LED control signal line；
Storage capacitance is connected between first node and second node.
Optionally, in the pixel circuit, the cathode of Organic Light Emitting Diode is connect with second source, and described first
Power supply and second source are used as the driving power of the Organic Light Emitting Diode, and the third power supply is electric for providing initialization
It is flat.
Optionally, in the pixel circuit, the third thin film transistor (TFT) be driving transistor, the third film
The data voltage and the first power supply that the electric current that transistor is provided to the Organic Light Emitting Diode is provided by the data line provide
The first supply voltage determine, it is and unrelated with the threshold voltage of the third thin film transistor (TFT).
Correspondingly, the present invention also provides a kind of driving method of pixel circuit, the driving method packet of the pixel circuit
It includes：
Scan period includes first time period, second time period and third period, wherein,
In first time period, scanning signal that the first scan control signal line and third scan control signal line provide by
High level becomes low level, and the scanning signal that the second scan control signal line provides keeps high level, opens the second film crystal
Pipe and the 4th thin film transistor (TFT), are written first node, and pass through third power supply and second node is initialized by data-signal；
In second time period, the scanning signal that the first scan control signal line provides is high level, and third scan control is believed
The scanning signal that number line provides keeps low level, and the scanning signal that the second scan control signal line provides becomes low electricity from high level
It is flat, the 5th thin film transistor (TFT) is opened, is boosted to second node；
In the third period, the first scan control signal line, the second scan control signal line and third scan control signal
The scanning signal that line provides is high level, and the control signal that LED control signal line provides becomes low level from high level, beats
First film transistor and the 6th thin film transistor (TFT) are opened, the Organic Light Emitting Diode is lighted luminous.
Optionally, in the driving method of the pixel circuit, the scan period further included for the 4th period, described
4th period was set between the third period and first time period；
In the 4th period, the first scan control signal line, the second scan control signal line and third scan control signal
The scanning signal that line provides is high level, and the control signal that LED control signal line provides becomes high level from low level, the
One thin film transistor (TFT) and the 6th thin film transistor (TFT) are become ending from conducting, and the Organic Light Emitting Diode stops shining.
Optionally, in the driving method of the pixel circuit, the scan period further included for the 5th period, described
5th period was set between first time period and second time period；
In the 5th period, the scanning signal that the first scan control signal line provides becomes high level, third from low level
The scanning signal that scan control signal line provides keeps low level, the scanning signal and shine that the second scan control signal line provides
The control signal that control signal wire provides keeps high level, and the 4th thin film transistor (TFT) becomes ending, stop to second from being connected
The initialization of node.
Optionally, in the driving method of the pixel circuit, the scan period further included for the 6th period；It is described
6th period was set between second time period and third period；
In the 6th period, the scanning signal of the first scan control signal line offer and the control of LED control signal line offer
Signal processed keeps high level, and the scanning signal that the second scan control signal line and third scan control signal line provide is by low electricity
Flat to become high level, the second thin film transistor (TFT) and the 5th thin film transistor (TFT) are become ending from conducting, and data voltage stops write-in.
Correspondingly, the present invention also provides a kind of active matrix/organic light emitting display, the active matrix organic light-emitting
Display includes pixel circuit as described above.
In pixel circuit provided by the invention and its driving method and active matrix/organic light emitting display, pass through first
Scan control signal line, the second scan control signal line and third scan control signal line control respectively the 4th thin film transistor (TFT),
The working condition of 5th thin film transistor (TFT) and the second thin film transistor (TFT), while pass through LED control signal line traffic control the first film crystalline substance
The working condition of body pipe and the 6th thin film transistor (TFT) so that electric current that the third thin film transistor (TFT) as driving element is exported with
The threshold voltage of the third thin film transistor (TFT) is unrelated, as a result, using the pixel circuit and its organic light emission of driving method
Display to avoid the brightness disproportionation caused by the threshold voltage deviation as thin film transistor (TFT), can improve the display matter of image
Amount.
Description of the drawings
Fig. 1 is the circuit diagram of the pixel circuit of the active matrix/organic light emitting display of the prior art；
Fig. 2 is the circuit diagram of the pixel circuit of the embodiment of the present invention；
Fig. 3 is the sequence diagram of the driving method of pixel circuit that the present invention is implemented.
Specific embodiment
A kind of pixel circuit and its driving method and active square are proposed to the present invention below in conjunction with the drawings and specific embodiments
Battle array organic light emitting display is described in further detail.According to following explanation and claims, advantages and features of the invention
It will become apparent from.It should be noted that attached drawing is using very simplified form and using non-accurate ratio, only to it is convenient,
Lucidly aid in illustrating the purpose of the embodiment of the present invention.
It please refers to Fig.2, is the structure diagram of the pixel circuit of the embodiment of the present invention.As shown in Fig. 2, the pixel electricity
Road 20 includes：First film transistor T1 is connected between first node N and the first power supply, and grid is connected to light emitting control
Signal wire EM (n)；Second thin film transistor (TFT) T2, is connected between data line and first node N, and grid is connected to third scanning
Control signal wire S3；Third thin film transistor (TFT) T3, is connected between the source electrode of the first power supply and the 6th thin film transistor (TFT) T6, grid
Pole is connected to second node M；4th thin film transistor (TFT) T4 is connected between second node M and third power supply, and grid is connected to
One scanning control signal wire S1；5th thin film transistor (TFT) T5, be connected to second node M and the 6th thin film transistor (TFT) T6 source electrode it
Between, grid is connected to the second scan control signal line S2；6th thin film transistor (TFT) T6 is connected to the 5th thin film transistor (TFT) T5's
Between drain electrode and the anode of Organic Light Emitting Diode OLED, grid is also connected to LED control signal line EM (n)；Storage capacitance
Cs is connected between first node N and second node M.
Specifically, the pixel circuit 20 receives the first power supply signal provided from external (for example, from power supply), the second electricity
Source signal and third power supply signal, and connect with the anode of Organic Light Emitting Diode OLED, the moon of Organic Light Emitting Diode OLED
Pole is connected to second source.Organic Light Emitting Diode OLED sends out correspondence according to the driving current that the pixel circuit 20 is provided
The light of brightness.Wherein, the driving power of first power supply and second source as Organic Light Emitting Diode OLED, described first
For providing the first supply voltage ELVDD, the second source is used to provide second source voltage ELVSS, the third power supply
Power supply initializes level Vinit for providing.
In the present embodiment, the first supply voltage ELVDD requirements that the first power supply provides are less than the data electricity that data line provides
Press Vdata.
Please continue to refer to Fig. 2, the pixel circuit 20 is a kind of 6T1C types circuit structure, including 6 thin film transistor (TFT)s and 1
A capacitance.Wherein, third thin film transistor (TFT) T3 is switching transistor as driving transistor, other thin film transistor (TFT)s.
Please continue to refer to Fig. 2, the pixel circuit 20 is connected with three scan control signal lines.Wherein, the described 4th is thin
Film transistor T4 is connected with the first scan control signal line S1, the 5th thin film transistor (TFT) T5 and the second scan control signal line
S2 is connected, and the second thin film transistor (TFT) T2 is connected with third scan control signal line S3, the second scan control signal line
The scanning signal that S2 is provided is the scanning signal in next period that the first scan control signal line S1 is provided, i.e., described first
The scanning signal that scan control signal line S1 is provided is if S (n-1), then the scanning that the second scan control signal line S2 is provided
Signal is S (n).
As shown in Fig. 2, second thin film transistor (TFT) T2 is controlled by third scan control signal line S3 in the pixel circuit 20,
5th thin film transistor (TFT) T5 is controlled by the second scan control signal line S2, and the 4th thin film transistor (TFT) T4 is by the first scan control signal
Line S1 is controlled, and the first film transistor T1 and the 6th thin film transistor (TFT) T6 are controlled by LED control signal line EM (n).Its
In, the first scan control signal line S1 initializes the write-in of level for controlling；The second scan control signal line S2
For controlling the boosting of second node M；The third scan control signal line S3 is used to control the write-in of data-signal DATA, institute
LED control signal line EM (n) is stated for controlling shining for the Organic Light Emitting Diode OLED.
Correspondingly, the present invention also provides a kind of driving methods of pixel circuit.Incorporated by reference to referring to figs. 2 and 3, the picture
The driving method of plain circuit includes：
First time period t1, second time period t2 and third time period t 3 will be divided into the scan period；
In first time period t1, the scanning that the first scan control signal line S1 and third scan control signal line S3 are provided is believed
Number low level is become from high level, the scanning signal that the second scan control signal line S2 is provided keeps high level, opens second
First node is written in data-signal by thin film transistor (TFT) T2 and the 4th thin film transistor (TFT) T4, and is passed through third power supply and saved to second
Point M is initialized；
In second time period t2, the scanning signal that the first scan control signal line S1 is provided is high level, and third scanning is controlled
The scanning signal that signal wire S3 processed is provided keeps low level, and the scanning signal that the second scan control signal line S2 is provided is by high level
Become low level, open the 5th thin film transistor (TFT) T5, boost to second node M；
In third time period t 3, the first scan control signal line S1, the second scan control signal line S2 and third scanning control
The scanning signal that signal wire S3 processed is provided is high level, and the control signal that LED control signal line EM (n) is provided is by high level
Become low level, open first film transistor T1 and the 6th thin film transistor (TFT) T6, the Organic Light Emitting Diode OLED is lighted
It shines.
Specifically, first, first time period t1, second time period t2 and third time period t 3 will be divided into the scan period.
In first time period t1, since what the first scan control signal line S1 and third scan control signal line S3 was provided sweeps
It retouches signal and low level is become from high level, by the second thin film transistor (TFT) T2 of third scan control signal line S3 controls and by the
4th thin film transistor (TFT) T4 of one scanning control signal wire S1 controls is become being connected from cut-off, and other thin film transistor (TFT)s are located
In cut-off state, data line charges to the storage capacitance Cs by the second thin film transistor (TFT) T2, by data-signal
Storage capacitance Cs is written, the voltage of first node N is Vdata at the end of charging.At the same time, third power supply passes through the 4th film
Transistor T4 initializes second node M, and the voltage of the second node M is Vinit after initialization.
In second time period t2, since the second scan control signal line S2 scanning signals provided become low electricity from high level
It is flat, become being connected from ending by the second scan control signal line S2 the 5th thin film transistor (TFT) T5 controlled, the voltage of second node M
It is raised to ELVDD- | Vth |, since the second thin film transistor (TFT) T2 at this time is still in opening state, the first node N
Voltage keep Vdata it is constant.
In third time period t 3, since LED control signal line EM (n) the control signals provided become low electricity from high level
Flat, first film transistor T1 and the 6th thin film transistor (TFT) T6 by LED control signal line EM (n) controls have cut-off to become
Conducting, driving current is along the first power supply through third thin film transistor (TFT) T3 and the 6th thin film transistor (TFT) T6 and Organic Light Emitting Diode
The path of OLED flows to second source, Organic Light Emitting Diode OLED is caused to light luminous.In the process, due to the first scanning
The scanning signal that control signal wire S1, the second scan control signal line S2 and third scan control signal line S3 are provided is high electricity
Flat, the second thin film transistor (TFT) T2, the 4th thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 are in cut-off state, and at this time first
The voltage of node from Vdata saltus steps be ELVDD.Due to the coupling of storage capacitance Cs, the voltage of second node M is from ELVDD-
| Vth | saltus step 2ELVDD- | Vth |-Vdata.
At this point, the grid voltage Vg3 (i.e. the voltage of second node M) of the third thin film transistor (TFT) T3 is 2ELVDD- |
Vth|-Vdata。
Since the source voltage of the third thin film transistor (TFT) T3 is equal to the first supply voltage of first power supply offer
ELVDD, therefore the gate source voltage Vsg3 of the third thin film transistor (TFT) T3, i.e., described third thin film transistor (TFT) T3 grids and source electrode
Between voltage difference can be calculated by the following formula：
Vsg3=ELVDD- (2ELVDD- | Vth |-Vdata) formula 1；
It can be obtained by formula 1：
Vsg3-Vth=Vdata-ELVDD formula 2；
The Organic Light Emitting Diode OLED sends out the light proportional to the electric current provided, flows through the organic light-emitting diodes
The calculation formula of the electric current Ion of pipe OLED is：
Ion=K × and (Vsg3- | Vth |)2Formula 3；
Wherein, K is electron mobility, breadth length ratio, the product of unit-area capacitance three of thin film transistor (TFT).
It can be obtained by formula 2 and formula 3：
Ion=K × (Vdata-ELVDD)2
Expression formula based on above-mentioned formula is it is found that flow through the electric current of the Organic Light Emitting Diode OLED and third film crystalline substance
The threshold voltage of body pipe T3 is not related, only related with data voltage Vdata, supply voltage ELVDD and constant K.Even if make
There are deviations for the threshold voltage of third thin film transistor (TFT) T3 for driving transistor, will not be to flowing through the organic light-emitting diodes
The electric current Ion of pipe OLED is impacted.Therefore, it can completely be avoided because of threshold value using the pixel circuit 20 and its driving method
Brightness disproportionation phenomenon caused by voltage deviation.
The pixel circuit 20 mainly by the work of three above period, realizes the compensation function of threshold voltage.
Please continue to refer to Fig. 3, the scan period further includes the 4th time period t 4, the 5th time period t 5 and the 6th time period t 6.
Wherein, the 4th time period t 4 is set between third time period t 3 and the first time period t1 in next period, the 5th time period t 5
It is set between first time period t1 and second time period t2, the 6th time period t 6 is set to second time period t2 and third time
Between section t3.
In the 4th time period t 4, the first scan control signal line S1, the second scan control signal line S2 and third scanning control
The scanning signal that signal wire S3 processed is provided is high level, and the control signal that LED control signal line EM (n) is provided is by low level
Become high level, by LED control signal line EM (n) control first film transistor T1 and the 6th thin film transistor (TFT) T6 by
Conducting becomes ending, and the Organic Light Emitting Diode OLED stops shining.
In the 5th time period t 5, the scanning signal that the first scan control signal line S1 is provided becomes high level from low level,
The scanning signal that third scan control signal line S3 is provided keeps low level, the scanning letter that the second scan control signal line S2 is provided
Number and LED control signal line EM (n) provide control signal keep high level, by the first scan control signal line S1 control
The 4th thin film transistor (TFT) from be connected become T4 cut-off, so as to stop the initialization to second node M.
In the 6th time period t 6, the scanning signal and LED control signal line EM of the first scan control signal line S1 offers
(n) the control signal provided keeps high level, and the second scan control signal line S2 and third scan control signal line S3 are provided
Scanning signal from low level become high level, the second thin film transistor (TFT) T2 and the 5th thin film transistor (TFT) T5 from conducting become cut
Only, since the second thin film transistor (TFT) T2 ends, data voltage Vdata stops write-in.
Repeat the 4th time period t 4, first time period t1, the 5th time period t 5, second time period t2, the 6th time period t 6
With the course of work of third time period t 3, image display function is completed.
Correspondingly, the present invention also provides a kind of active matrix/organic light emitting display, the active matrix organic light-emitting
Display includes pixel circuit 20 as described above, specifically please refers to above, details are not described herein again.
To sum up, in pixel circuit provided by the invention and its driving method and active matrix/organic light emitting display, lead to
Cross the first scan control signal line, the second scan control signal line and third scan control signal line controls the 4th film brilliant respectively
The working condition of body pipe, the 5th thin film transistor (TFT) and the second thin film transistor (TFT), while pass through LED control signal line traffic control first
The working condition of thin film transistor (TFT) and the 6th thin film transistor (TFT) so that the third thin film transistor (TFT) as driving element was exported
Electric current is unrelated with the threshold voltage of the third thin film transistor (TFT), as a result, having using the pixel circuit and its driving method
Machine active display can improve the aobvious of image to avoid the brightness disproportionation caused by the threshold voltage deviation as thin film transistor (TFT)
Show quality.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (8)
1. a kind of pixel circuit, including first film transistor, the second thin film transistor (TFT), third thin film transistor (TFT), the 4th film
Transistor, the 5th thin film transistor (TFT), the 6th thin film transistor (TFT) and storage capacitance, it is characterised in that：
The first film transistor is connected between first node and the first power supply, and grid is connected to LED control signal
Line；
Second thin film transistor (TFT), is connected between data line and first node, and grid is connected to third scan control letter
Number line；
The third thin film transistor (TFT), is connected between the source electrode of the first power supply and the 6th thin film transistor (TFT), and grid is connected to
Two nodes；
4th thin film transistor (TFT), is connected between second node and third power supply, and grid is connected to the first scan control
Signal wire；
5th thin film transistor (TFT), is connected between the source electrode of second node and the 6th thin film transistor (TFT), grid is connected to
Second scan control signal line；
6th thin film transistor (TFT), is connected between the drain electrode of the 5th thin film transistor (TFT) and the anode of Organic Light Emitting Diode,
Its grid is connected to LED control signal line, and the cathode of the Organic Light Emitting Diode is connect with second source；
The storage capacitance, is connected between first node and second node.
2. pixel circuit as described in claim 1, which is characterized in that first power supply and second source are as described organic
The driving power of light emitting diode, the third power supply initialize level for providing.
3. pixel circuit as described in claim 1, which is characterized in that the third thin film transistor (TFT) be driving transistor, institute
It states third thin film transistor (TFT) and is provided to the data voltage and that the electric current of the Organic Light Emitting Diode is provided by the data line
The first supply voltage decision that one power supply provides, and it is unrelated with the threshold voltage of the third thin film transistor (TFT).
A kind of 4. driving method of pixel circuit as claimed any one in claims 1 to 3, which is characterized in that scan period
Including first time period, second time period and third period, wherein,
In first time period, the scanning signal that the first scan control signal line and third scan control signal line provide is by high electricity
Flat to become low level, the scanning signal that the second scan control signal line provides keeps high level, open the second thin film transistor (TFT) and
First node is written in data-signal by the 4th thin film transistor (TFT), and passes through third power supply and second node is initialized；
In second time period, scanning signal that the first scan control signal line provides is high level, third scan control signal line
The scanning signal of offer keeps low level, and the scanning signal that the second scan control signal line provides becomes low level from high level,
The 5th thin film transistor (TFT) is opened, is boosted to second node；
In the third period, the first scan control signal line, the second scan control signal line and third scan control signal line carry
The scanning signal of confession is high level, and the control signal that LED control signal line provides becomes low level from high level, opens the
One thin film transistor (TFT) and the 6th thin film transistor (TFT), the Organic Light Emitting Diode are lighted luminous.
5. the driving method of pixel circuit as claimed in claim 4, which is characterized in that when the scan period further includes the 4th
Between section, the 4th period is set between the third period and first time period；
In the 4th period, the first scan control signal line, the second scan control signal line and third scan control signal line carry
The scanning signal of confession is high level, and the control signal that LED control signal line provides becomes high level from low level, and first is thin
Film transistor and the 6th thin film transistor (TFT) are become ending from conducting, and the Organic Light Emitting Diode stops shining.
6. the driving method of pixel circuit as claimed in claim 4, which is characterized in that when the scan period further includes the 5th
Between section, the 5th period is set between first time period and second time period；
In the 5th period, the scanning signal that the first scan control signal line provides becomes high level, third scanning from low level
The scanning signal that control signal wire provides keeps low level, the scanning signal and light emitting control that the second scan control signal line provides
The control signal that signal wire provides keeps high level, and the 4th thin film transistor (TFT) becomes ending, stop to second node from being connected
Initialization.
7. the driving method of pixel circuit as claimed in claim 4, which is characterized in that when the scan period further includes the 6th
Between section；6th period was set between second time period and third period；
In the 6th period, the control letter for scanning signal and LED control signal the line offer that the first scan control signal line provides
High level number is kept, the scanning signal that the second scan control signal line and third scan control signal line provide is become by low level
For high level, the second thin film transistor (TFT) and the 5th thin film transistor (TFT) are become ending from conducting, and data voltage stops write-in.
8. a kind of active matrix/organic light emitting display, which is characterized in that including：As claimed any one in claims 1 to 3
Pixel circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410785254.9A CN105761664B (en) | 2014-12-16 | 2014-12-16 | Pixel circuit and its driving method and active matrix/organic light emitting display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410785254.9A CN105761664B (en) | 2014-12-16 | 2014-12-16 | Pixel circuit and its driving method and active matrix/organic light emitting display |
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| CN106683616A (en) * | 2017-02-09 | 2017-05-17 | 信利（惠州）智能显示有限公司 | Active-matrix-organic-light-emitting display device |
| CN106991968B (en) | 2017-05-27 | 2020-11-27 | 京东方科技集团股份有限公司 | Pixel compensation circuit, pixel compensation method and display device |
| CN107346654B (en) * | 2017-08-29 | 2023-11-28 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and display device |
| CN109243370B (en) | 2018-11-22 | 2020-07-03 | 京东方科技集团股份有限公司 | Display panel and pixel driving circuit of light emitting diode |
| CN109346012A (en) * | 2018-12-05 | 2019-02-15 | 深圳市华星光电半导体显示技术有限公司 | Pixel-driving circuit and display device |
| CN109523953A (en) * | 2018-12-21 | 2019-03-26 | 深圳市华星光电半导体显示技术有限公司 | Active matrix organic light-emitting diode pixel-driving circuit |
| CN109979394A (en) | 2019-05-17 | 2019-07-05 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, array substrate and display device |
| CN114913812A (en) * | 2021-02-09 | 2022-08-16 | 上海和辉光电股份有限公司 | Pixel circuit, driving method thereof and organic light emitting display device |
| CN115966178A (en) * | 2022-12-28 | 2023-04-14 | 惠科股份有限公司 | Pixel driving circuit, method and device and display device |
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Effective date of registration: 20201209 Address after: No.146 Tianying Road, high tech Zone, Chengdu, Sichuan Province Patentee after: Chengdu CHENXIAN photoelectric Co.,Ltd. Address before: No. 188, CHENFENG Road, Kunshan high tech Zone, Kunshan City, Suzhou City, Jiangsu Province Patentee before: Kunshan New Flat Panel Display Technology Center Co.,Ltd. Patentee before: KunShan Go-Visionox Opto-Electronics Co.,Ltd. |