CN110322831A - A kind of AMOLED sequential control circuit and sequential control method - Google Patents
A kind of AMOLED sequential control circuit and sequential control method Download PDFInfo
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- CN110322831A CN110322831A CN201810265245.5A CN201810265245A CN110322831A CN 110322831 A CN110322831 A CN 110322831A CN 201810265245 A CN201810265245 A CN 201810265245A CN 110322831 A CN110322831 A CN 110322831A
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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]
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The present invention relates to field of display technology, disclose a kind of AMOLED sequential control circuit and sequential control method, the sequential control circuit includes: first film transistor, second thin film transistor (TFT), third thin film transistor (TFT), 4th thin film transistor (TFT), 5th thin film transistor (TFT), capacitor and Organic Light Emitting Diode, it further include the 7th thin film transistor (TFT) being set between first film transistor second end and first node and the 6th thin film transistor (TFT) being set between first film transistor second end and third node, second thin film transistor (TFT) is symmetrical arranged with the 6th thin film transistor (TFT) and threshold value is equal, it can compensate for the threshold voltage of driving thin film transistor (TFT), the sequential control circuit can reduce the wiring of panel itself to adapt to the pixel space of small size.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of AMOLED sequential control circuit and sequential control method.
Background technique
As shown in Figure 1, a kind of existing AMOLED sequential control circuit, AMOLED pixel-driving circuit is 7T1C structure,
That is the structure that seven thin film transistor (TFT)s add a capacitor, comprising: first film transistor T10, the second thin film transistor (TFT) T20,
It is three thin film transistor (TFT) T30, the 4th thin film transistor (TFT) T40, the 5th thin film transistor (TFT) T50, the 6th thin film transistor (TFT) T60, the 7th thin
Film transistor T70 and capacitor C10, wherein the grid of first film transistor T10 is electrically connected at the second scan control signal line
S2, first end are electrically connected at data signal line DATA, and second end is electrically connected at the second film crystal via first node N10
The first end of the first end of pipe T20 and the 4th thin film transistor (TFT) T40；The grid of second thin film transistor (TFT) T20 is through being electrically connected at
Second node N20, first end are electrically connected at first node N10, and second end is electrically connected at third node N30；Third film
The grid of transistor T30 is electrically connected at the second scan control signal line S2, and first end is electrically connected at third node N30, the
Two ends are electrically connected at the first end of second node N20 and the 6th thin film transistor (TFT) T60；4th thin film transistor (TFT) T40 grid electricity
Property is connected to luminous signal line En, and first end is electrically connected at first node N10, and second end is electrically connected at supply voltage
ELVDD；5th thin film transistor (TFT) T50 grid is electrically connected at luminous signal line En, and first end is electrically connected at third node
N30, second end are electrically connected at the anode of organic light emitting diode D10 and the second end of the 7th thin film transistor (TFT) T70；6th is thin
The grid of film transistor T60 is electrically connected at the first scan control signal line S1, and first end is electrically connected at third film crystal
The second end of pipe T30, second end are electrically connected at the first end and reference voltage signal line VINT of the 7th thin film transistor (TFT) T70；
The grid of 7th thin film transistor (TFT) T70 connects the second scan control signal line S2, and first end is electrically connected at the 6th film crystal
The second end and reference voltage signal line VINT of pipe T60, second end be electrically connected at the 5th thin film transistor (TFT) T50 second end and
The anode of organic light emitting diode D10；The first end of capacitor C10 is electrically connected at second node N20, and the other end is connected to
Supply voltage ELVDD；The anode of Organic Light Emitting Diode D10 is electrically connected at the second end and of the 5th thin film transistor (TFT) T50
The second end of seven thin film transistor (TFT) T70, minus earth.
Above-mentioned AMOLED sequential control circuit has the first scan control signal line S1, two the second scan control signal lines
Multiple signal wires such as S2, reference voltage signal line VINT, wiring is complicated, is unable to satisfy lesser Pixel Dimensions.
Summary of the invention
The present invention provides a kind of AMOLED sequential control circuit and sequential control method, above-mentioned AMOLED timing control electricity
Road can reduce the wiring of panel itself to adapt to the pixel space of small size.
In order to achieve the above objectives, the present invention provides a kind of AMOLED sequential control circuit, including first film transistor,
Two thin film transistor (TFT)s, third thin film transistor (TFT), the 4th thin film transistor (TFT), the 5th thin film transistor (TFT), capacitor and organic light-emitting diodes
Pipe；
The grid of the first film transistor is electrically connected at scan control signal line, and first end is electrically connected at data
Signal wire, second end are electrically connected at first node；
The grid of second thin film transistor (TFT) is electrically connected at second node, and first end is electrically connected at first node,
Second end is electrically connected at third node；
The grid of the third thin film transistor (TFT) is electrically connected at scan control signal line, and first end is electrically connected at second
Node, second end are electrically connected at third node；
The grid of 4th thin film transistor (TFT) is electrically connected at luminous signal line, and first end is electrically connected at power supply electricity
Pressure, second end are electrically connected at first node；
The grid of 5th thin film transistor (TFT) is electrically connected at luminous signal line, and first end is electrically connected at third section
Point, second end are electrically connected at the anode of Organic Light Emitting Diode；
The first end of the capacitor is electrically connected at second node；Second end is electrically connected at supply voltage；
The anode of the Organic Light Emitting Diode is electrically connected at the second end of the 5th thin film transistor (TFT), minus earth；
Second thin film transistor (TFT) is driving thin film transistor (TFT).
Above-mentioned AMOLED sequential control circuit uses 5T1C structure, and it is brilliant that driving film is compensated by third thin film transistor (TFT)
The threshold value voltage of body pipe, above-mentioned AMOLED sequential control circuit reduce scan signal line and reference voltage signal line and reduce
The wiring of panel itself is to adapt to the pixel space of small size.
Above-mentioned AMOLED sequential control circuit further include:
The 7th thin film transistor (TFT) being set between first film transistor second end and first node, the 7th film
The grid of transistor is electrically connected at second node, and first end is electrically connected at first film transistor second end, second end electricity
Property is connected to first node；
The 6th thin film transistor (TFT) being set between first film transistor second end and third thin film transistor (TFT), described
The grid of six thin film transistor (TFT)s is electrically connected at the first end of second node and capacitor and is total to grid with second thin film transistor (TFT)
Pole, first end are electrically connected at first film transistor second end, and second end is electrically connected at the second of third thin film transistor (TFT)
End and third node.
Above-mentioned AMOLED sequential control circuit uses 7T1C structure, by being symmetrical arranged the 6th equal film of threshold voltage
Transistor and the second thin film transistor (TFT) realize the function of the threshold value voltage of compensation driving thin film transistor (TFT), pass through organic hair
The electric current of optical diode drives the threshold voltage of transistor unrelated with the second thin film transistor (TFT)；Above-mentioned AMOLED timing control electricity
Road reduces scan signal line and reference voltage signal line and reduces the wiring of panel itself to adapt to the pixel of small size sky
Between.
Preferably, the first film transistor, the second thin film transistor (TFT), third thin film transistor (TFT), the 4th film crystal
Pipe, the 5th thin film transistor (TFT), the 6th thin film transistor (TFT), the 7th thin film transistor (TFT) are low-temperature polysilicon film transistor, oxidation
Object semiconductor thin-film transistor or amorphous silicon film transistor.
Preferably, the 6th thin film transistor (TFT) and the second thin film transistor (TFT) are symmetrical arranged, and the channel width phase of the two
Together.
Preferably, the input terminal of the scan control signal line and the input terminal of luminous signal line be equipped with for outside
The connection terminal of sequence controller connection.
The present invention also provides a kind of sequential control method of the AMOLED sequential control circuit in above-mentioned technical proposal, packets
It includes:
Into initial phase, supply voltage is in an off state, and luminous signal line provides low potential, the 4th film crystal
Pipe and the 5th thin film transistor (TFT) are opened, and the voltage of third node is equal to the voltage of Organic Light Emitting Diode anode, scan control letter
Number line provides low potential, and first film transistor and third thin film transistor (TFT) are opened, and the voltage of second node is equal to organic light emission
The voltage of diode anode, the second thin film transistor (TFT) are opened, and supply voltage is in an off state, data signal line is off shape
State or offer low potential pass through no current in Organic Light Emitting Diode, and Organic Light Emitting Diode does not shine；
Into the adjusting stage, at the end of the adjusting stage, supply voltage is in an off state or provides high potential state,
Luminous signal line provides high potential, and the 4th thin film transistor (TFT) and the 5th thin film transistor (TFT) are closed, and Organic Light Emitting Diode does not shine,
Scan control signal line provides high potential, and first film transistor and third thin film transistor (TFT) are closed, and the voltage of second node is protected
The voltage equal to Organic Light Emitting Diode anode is held, the second thin film transistor (TFT) is opened；
Into data write phase, supply voltage is in an off state, and luminous signal line provides high potential, and the 4th film is brilliant
Body pipe and the 5th thin film transistor (TFT) are closed, and Organic Light Emitting Diode does not shine, and scan control signal line provides low potential, and first is thin
Film transistor and third thin film transistor (TFT) are opened, and data signal line provides high potential, and second node is written data signal line and provides
Voltage, the second thin film transistor (TFT) close；
Into the stage of holding, supply voltage is in an off state or provides high potential state, and luminous signal line provides high electricity
Position, the 4th thin film transistor (TFT) and the 5th thin film transistor (TFT) are closed, and Organic Light Emitting Diode does not shine, and scan control signal line provides
High potential, first film transistor and third thin film transistor (TFT) are closed, and second node keeps the data of data write phase write-in
The voltage that signal wire provides, the second thin film transistor (TFT) are closed；
Into the driving stage, scan control signal line provides high potential, first film transistor and third thin film transistor (TFT)
It closes, supply voltage provides high potential, and luminous signal line provides low potential, and the 4th thin film transistor (TFT) and the 5th thin film transistor (TFT) are beaten
It opens, the second thin film transistor (TFT) is in the open state, organic light-emitting diode.
Preferably, the above-mentioned adjusting stage includes:
In the first adjustment stage, supply voltage is in an off state, and luminous signal line provides low potential, the 4th thin film transistor (TFT)
And the 5th thin film transistor (TFT) open, scan control signal line provides high potential, first film transistor and third thin film transistor (TFT)
It closes, the voltage of second node keeps equal to the voltage of Organic Light Emitting Diode anode, and the second thin film transistor (TFT) is in open shape
State but pass through without electric current, Organic Light Emitting Diode does not shine at this time；
In the second adjustment stage, supply voltage is in an off state or provides high potential state, and luminous signal line provides high electricity
Position, the 4th thin film transistor (TFT) and the 5th thin film transistor (TFT) are closed, and Organic Light Emitting Diode does not shine, and scan control signal line provides
High potential, first film transistor and third thin film transistor (TFT) are closed, and the voltage of second node keeps equal to organic light-emitting diodes
The voltage of tube anode, the second thin film transistor (TFT) are opened.
When AMOLED sequential control circuit includes the 6th thin film transistor (TFT) and seven thin film transistor (TFT)s:
In above-mentioned initial phase, supply voltage is in an off state, and luminous signal line provides low potential, and the 4th film is brilliant
Body pipe and the 5th thin film transistor (TFT) are opened, and the voltage of third node is equal to the voltage of Organic Light Emitting Diode anode, scan control
Signal wire provides low potential, and first film transistor and third thin film transistor (TFT) are opened, and the voltage of second node is equal to organic hair
The voltage of optical diode anode, the second thin film transistor (TFT), the 6th thin film transistor (TFT) and the 7th thin film transistor (TFT) are opened, supply voltage
In an off state, data signal line is in an off state or provides low potential and makes no current in Organic Light Emitting Diode logical
It crosses, Organic Light Emitting Diode does not shine；
In the above-mentioned adjusting stage, at the end of the adjusting stage, supply voltage is in an off state or provides high potential shape
State, luminous signal line provide high potential, and the 4th thin film transistor (TFT) and the 5th thin film transistor (TFT) are closed, and Organic Light Emitting Diode is not sent out
Light, scan control signal line provide high potential, and first film transistor and third thin film transistor (TFT) are closed, the voltage of second node
Keep equal to the voltage of Organic Light Emitting Diode anode, the second thin film transistor (TFT), the 6th thin film transistor (TFT) and the 7th film crystal
Pipe is opened；In above-mentioned data write phase, supply voltage is in an off state, and luminous signal line provides high potential, the 4th film
Transistor and the 5th thin film transistor (TFT) are closed, and scan control signal line provides low potential, first film transistor and third film
Transistor is opened, and data signal line provides high potential, and the 6th thin film transistor (TFT) is first in opening state, and data signal line provides
Voltage through first film transistor, the 6th thin film transistor (TFT) and third thin film transistor (TFT) be written second node, work as second node
That is the voltage of the 6th thin-film transistor gate reach the 6th thin film transistor (TFT) after Vdata+Vth6 close, the second thin film transistor (TFT) and
7th thin film transistor (TFT) is closed, and wherein Vth6 is the threshold voltage of the 6th thin film transistor (TFT), and Vdata is the electricity that data-signal provides
Pressure；
In the above-mentioned holding stage, supply voltage is in an off state or provides high potential state, and luminous signal line provides high
Current potential, the 4th thin film transistor (TFT) and the 5th thin film transistor (TFT) are closed, and Organic Light Emitting Diode does not shine, and scan control signal line mentions
For high potential, first film transistor and third thin film transistor (TFT) are closed, and the voltage of second node keeps data write phase to write
The voltage that the data signal line entered provides, the second thin film transistor (TFT), the 6th thin film transistor (TFT) and the 7th thin film transistor (TFT) are closed；On
It states in the driving stage, scan control signal line provides high potential, and first film transistor and third thin film transistor (TFT) are closed, power supply
Voltage provides high potential, and luminous signal line provides low potential, and the 4th thin film transistor (TFT) and the 5th thin film transistor (TFT) are opened, and second is thin
Film transistor, the 6th thin film transistor (TFT) and the 7th thin film transistor (TFT) are in the open state, organic light-emitting diode.
When AMOLED sequential control circuit includes the 6th thin film transistor (TFT) and seven thin film transistor (TFT)s:
The above-mentioned adjusting stage includes:
In the first adjustment stage, supply voltage is in an off state, and luminous signal line provides low potential, the 4th thin film transistor (TFT)
And the 5th thin film transistor (TFT) open, scan control signal line provides high potential, first film transistor and third thin film transistor (TFT)
It closes, the voltage of second node keeps equal to the voltage of Organic Light Emitting Diode anode, and the second thin film transistor (TFT), the 6th film are brilliant
Body pipe and the 7th thin film transistor (TFT) are opened, and no current passes through in the second thin film transistor (TFT), and Organic Light Emitting Diode does not shine at this time；
In the second adjustment stage, supply voltage is in an off state or provides high potential state, and luminous signal line provides high electricity
Position, the 4th thin film transistor (TFT) and the 5th thin film transistor (TFT) are closed, and Organic Light Emitting Diode does not shine, and scan control signal line provides
High potential, first film transistor and third thin film transistor (TFT) are closed, and the voltage of second node keeps equal to organic light-emitting diodes
The voltage of tube anode, the second thin film transistor (TFT), the 6th thin film transistor (TFT) and the 7th thin film transistor (TFT) are opened.
Preferably, the scan control signal line is the signal having more than or equal to two pulses, includes at least one and owns
The pulse of the pulse of row same time and a progressive scan.
Detailed description of the invention
Fig. 1 is a kind of AMOLED sequential control circuit in the prior art；
Fig. 2 is the first AMOLED sequential control circuit provided by the invention；
Fig. 3 is second of AMOLED sequential control circuit provided by the invention；
Fig. 4 is the timing diagram of AMOLED sequential control circuit shown in Fig. 3；
Fig. 5 is circuit diagram of the AMOLED sequential control circuit shown in Fig. 3 in initial phase；
Fig. 6 is circuit diagram of the AMOLED sequential control circuit shown in Fig. 3 in the first adjustment stage；
Fig. 7 is circuit diagram of the AMOLED sequential control circuit shown in Fig. 3 in the second adjustment stage；
Fig. 8 is circuit diagram of the AMOLED sequential control circuit shown in Fig. 3 in data write phase；
Fig. 9 is circuit diagram of the AMOLED sequential control circuit shown in Fig. 3 in the stage of holding；
Figure 10 is circuit diagram of the AMOLED sequential control circuit shown in Fig. 3 in the driving stage.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 2, the present invention provides a kind of AMOLED sequential control circuit, including first film transistor T1, second
Thin film transistor (TFT) T2, third thin film transistor (TFT) T3, the 4th thin film transistor (TFT) T4, the 5th thin film transistor (TFT) T5, capacitor C1 and organic
Light emitting diode D1；
The grid of first film transistor T1 is electrically connected at scan control signal line Sn, and first end is electrically connected at data
Signal wire Data, second end are electrically connected at first node N1；
The grid of second thin film transistor (TFT) T2 is electrically connected at second node N2, and first end is electrically connected at first node
N1, second end are electrically connected at third node N3；
The grid of third thin film transistor (TFT) T3 is electrically connected at scan control signal line Sn, and first end is electrically connected at second
Node N2, second end are electrically connected at third node N3；
The grid of 4th thin film transistor (TFT) T4 is electrically connected at luminous signal line En, and first end is electrically connected at supply voltage
ELVDD, second end are electrically connected at first node N1；
The grid of 5th thin film transistor (TFT) T5 is electrically connected at luminous signal line En, and first end is electrically connected at third node
N3, second end are electrically connected at the anode of Organic Light Emitting Diode D1；
The first end of capacitor C1 is electrically connected at second node N2；Second end is electrically connected at supply voltage ELVDD；
The anode of Organic Light Emitting Diode D1 is electrically connected at the second end of the 5th thin film transistor (TFT) T5, minus earth；
Second thin film transistor (TFT) T2 is driving thin film transistor (TFT).
Above-mentioned AMOLED sequential control circuit uses 5T1C structure, and it is brilliant that driving film is compensated by third thin film transistor (TFT)
The threshold value voltage of body pipe, above-mentioned AMOLED sequential control circuit reduce scan signal line and reference voltage signal line and reduce
The wiring of panel itself is to adapt to the pixel space of small size.
With reference to Fig. 3, above-mentioned AMOLED sequential control circuit further include:
The 7th thin film transistor (TFT) T7 being set between first film transistor T1 second end and first node N1, the 7th is thin
The grid of film transistor T7 is electrically connected at second node N2, and first end is electrically connected at first film transistor T1 second end,
Second end is electrically connected at first node N1；
The 6th thin film transistor (TFT) T6 being set between first film transistor T1 second end and third thin film transistor (TFT) T3,
The grid of 6th thin film transistor (TFT) T6 be electrically connected at the first end of second node N2 and capacitor C1 and with the second thin film transistor (TFT)
T2 common gate, first end are electrically connected at first film transistor T1 second end, and second end is electrically connected at third film crystal
The second end and third node N3 of pipe T3.
Above-mentioned AMOLED sequential control circuit uses 7T1C structure, by being symmetrical arranged the 6th equal film of threshold voltage
Transistor and the second thin film transistor (TFT) realize the function of the threshold value voltage of compensation driving thin film transistor (TFT), pass through organic hair
The electric current of optical diode drives the threshold voltage of transistor unrelated with the second thin film transistor (TFT)；Above-mentioned AMOLED timing control electricity
Road reduces scan signal line and reference voltage signal line and reduces the wiring of panel itself to adapt to the pixel of small size sky
Between.
Specifically, first film transistor T1, the second thin film transistor (TFT) T2, third thin film transistor (TFT) T3, the 4th film are brilliant
Body pipe T4, the 5th thin film transistor (TFT) T5, the 6th thin film transistor (TFT) T6, the 7th thin film transistor (TFT) T7 are low-temperature polysilicon film crystalline substance
Body pipe, oxide semiconductor thin-film transistor or amorphous silicon film transistor.Wherein, the 6th thin film transistor (TFT) T6 and second is thin
Film transistor T2 is symmetrical arranged, and the channel width of the two is identical, thus the 6th thin film transistor (TFT) T6 and the second thin film transistor (TFT)
The threshold voltage of T2 is equal, and the threshold voltage of the 6th thin film transistor (TFT) T6 can compensate for the second thin film transistor (TFT) T2 and drive film
The threshold voltage of transistor, pass through Organic Light Emitting Diode electric current and the second thin film transistor (TFT) T2 threshold voltage without
It closes.Two thin film transistor (TFT) T2 are driving thin film transistor (TFT), and the 6th thin film transistor (TFT) T6 is mirror image thin film transistor (TFT).
Specifically, the input terminal of the input terminal of scan control signal line Sn and luminous signal line En be equipped with for outside
The connection terminal of sequence controller connection.Scan control signal line Sn and luminous signal line En passes through external sequence circuit and mentions
For.
The present invention also provides a kind of sequential control method of any one of above-mentioned technical proposal AMOLED sequence circuit, packets
It includes:
Into initial phase 1, supply voltage ELVDD is in an off state, at this time Organic Light Emitting Diode D1 anode
Voltage is substantially equal to ELVSS voltage -3V；Luminous signal line En provides low potential, and the 4th thin film transistor (TFT) T4 and the 5th film are brilliant
Body pipe T5 is opened, and the voltage of third node N3 is equal to the voltage of Organic Light Emitting Diode D1 anode, and scan control signal line Sn is mentioned
For low potential, first film transistor T1 and third thin film transistor (TFT) T3 are opened, and the voltage of second node N2 is equal to organic light emission
The voltage of diode D1 anode, that is, second node N2 voltage is equal to -3V, and the second thin film transistor (TFT) T2 is opened, supply voltage
ELVDD is in an off state, data signal line Data is in an off state or provides low potential makes Organic Light Emitting Diode
No current passes through in D1, and Organic Light Emitting Diode D1 does not shine；
Into the first adjustment stage 2, supply voltage ELVDD is in an off state, and luminous signal line En provides low potential, the
Four thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 are opened, and scan control signal line Sn provides high potential, the first film crystal
Pipe T1 and third thin film transistor (TFT) T3 is closed, and the voltage of second node N2 keeps equal to the voltage of Organic Light Emitting Diode D1 anode
I.e. the voltage of second node N2 be equal to -3V, since supply voltage ELVDD is in an off state, and first film transistor T1 and
Third thin film transistor (TFT) T3 is in close state, and the second thin film transistor (TFT) T2 is in the open state but passes through without electric current, at this time
Organic Light Emitting Diode D1 does not shine；
Into the second adjustment stage 3, supply voltage ELVDD is in an off state or provides high potential state, luminous signal
Line En provides high potential, and the 4th thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 are closed, and the 5th thin film transistor (TFT) T5 closing makes
Organic Light Emitting Diode D1 is obtained without guiding path without shining, scan control signal line Sn provides high potential, the first film crystal
Pipe T1 and third thin film transistor (TFT) T3 is closed, and the voltage of second node N2 keeps equal to the voltage of Organic Light Emitting Diode D1 anode
I.e. the voltage of second node N2 is equal to -3V, the second thin film transistor (TFT) T2 is opened.
Into data write phase 4, supply voltage ELVDD is in an off state, and luminous signal line En provides high potential, the
Four thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 are closed, and the 5th thin film transistor (TFT) T5 is closed so that Organic Light Emitting Diode D1
For no guiding path without shining, scan control signal line Sn provides low potential, first film transistor T1 and third film crystal
Pipe T3 is opened, data signal line Data offer high potential, the voltage that second node N2 write-in data signal line Data is provided, and second
Thin film transistor (TFT) T2 is closed；
Into the holding stage 5, supply voltage ELVDD is in an off state or provides high potential state, luminous signal line En
High potential is provided, the 4th thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 are closed, and the 5th thin film transistor (TFT) T5 is closed so that having
For machine light emitting diode D1 without guiding path without shining, scan control signal line Sn provides high potential, first film transistor T1
And third thin film transistor (TFT) T3 is closed, the electricity that second node N2 keeps the data signal line Data of data write phase write-in to provide
Pressure, the second thin film transistor (TFT) T2 are closed；
Into the driving stage 6, scan control signal line Sn provides high potential, and first film transistor T1 and third film are brilliant
Body pipe T3 close, supply voltage ELVDD provide high potential, luminous signal line En provide low potential, the 4th thin film transistor (TFT) T4 and
5th thin film transistor (TFT) T5 is opened, and the second thin film transistor (TFT) T2 is in the open state, and Organic Light Emitting Diode D1 shines.
When AMOLED sequential control circuit includes the 6th thin film transistor (TFT) T6 and the 7th thin film transistor (TFT) T7, the present invention is mentioned
The sequential control method of confession includes the following steps:
Please refer to Fig. 4 and Fig. 5, into initial phase 1, supply voltage ELVDD is in an off state, organic at this time
The voltage of light emitting diode D1 anode is substantially equal to ELVSS voltage -3V；Luminous signal line En provides low potential, and the 4th film is brilliant
Body pipe T4 and the 5th thin film transistor (TFT) T5 is opened, and the voltage of third node N3 is equal to the voltage of Organic Light Emitting Diode D1 anode,
Scan control signal line Sn provides low potential, and first film transistor T1 and third thin film transistor (TFT) T3 are opened, second node N2
Voltage be equal to Organic Light Emitting Diode D1 anode voltage, that is, second node N2 voltage be equal to -3V, the second thin film transistor (TFT)
T2, the 6th thin film transistor (TFT) T6 and the 7th thin film transistor (TFT) T7 are opened, and supply voltage ELVDD is in an off state, data-signal
Line Data it is in an off state or provide low potential pass through no current, organic light-emitting diodes
Pipe D1 does not shine；
Please refer to Fig. 4 Fig. 6, into the first adjustment stage 2, supply voltage ELVDD is in an off state, luminous signal
Line En provides low potential, and the 4th thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 are opened, and scan control signal line Sn provides high
Current potential, first film transistor T1 and third thin film transistor (TFT) T3 are closed, and the voltage of second node N2 keeps equal to organic light emission
The voltage of diode D1 anode, the second thin film transistor (TFT) T2, the 6th thin film transistor (TFT) T6 and the 7th thin film transistor (TFT) T7 are opened, by
In an off state in supply voltage ELVDD, no current passes through in the second thin film transistor (TFT) T2, and first film transistor T1 and
Third thin film transistor (TFT) T3 is in close state, so that Organic Light Emitting Diode D1 does not shine；
Please refer to Fig. 4 Fig. 7, into the second adjustment stage 3, supply voltage ELVDD is in an off state or provides high
Potential state, luminous signal line En provide high potential, and the 4th thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 are closed, and the 5th is thin
Film transistor T5 close so that Organic Light Emitting Diode D1 without guiding path without shining, scan control signal line Sn provides high electricity
Position, first film transistor T1 and third thin film transistor (TFT) T3 are closed, and the voltage of second node N2 keeps equal to organic light emission two
The voltage of pole pipe D1 anode, the second thin film transistor (TFT) T2, the 6th thin film transistor (TFT) T6 and the 7th thin film transistor (TFT) T7 are opened.
Please refer to Fig. 4 and Fig. 8, into data write phase 4, supply voltage ELVDD is in an off state, and shine letter
Number line En provides high potential, and the 4th thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 are closed, and the 5th thin film transistor (TFT) T5 is closed
So that Organic Light Emitting Diode D1 without guiding path without shining, scan control signal line Sn provides low potential, and the first film is brilliant
Body pipe T1 and third thin film transistor (TFT) T3 is opened, and data signal line Data provides high potential, and the 6th thin film transistor (TFT) T6 locates first
In opening state, the voltage that data signal line Data is provided is through first film transistor T1, the 6th thin film transistor (TFT) T6 and third
Second node N2 is written in thin film transistor (TFT) T3, when the voltage of i.e. the 6th thin film transistor (TFT) T6 grid of second node N2 reaches Vdata+
The 6th thin film transistor (TFT) T6 is closed after Vth6, the second thin film transistor (TFT) T2 and the 7th thin film transistor (TFT) T7 are closed, and wherein Vth6 is
The threshold voltage of 6th thin film transistor (TFT) T6, Vdata are the voltage that data-signal Data is provided；
Please refer to Fig. 4 and Fig. 9, into the holding stage 5, supply voltage ELVDD is in an off state or provides high electricity
Position state, luminous signal line En provide high potential, and the 4th thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 are closed, the 5th film
Transistor T5 close so that Organic Light Emitting Diode D1 without guiding path without shining, scan control signal line Sn provides high electricity
Position, first film transistor T1 and third thin film transistor (TFT) T3 are closed, and the voltage of second node N2 keeps data write phase to write
The voltage that the data signal line Data entered is provided, the second thin film transistor (TFT) T2, the 6th thin film transistor (TFT) T6 and the 7th film crystal
Pipe T7 is closed；
Please refer to Fig. 4 and Figure 10, into the driving stage 6, scan control signal line Sn provides high potential, the first film
Transistor T1 and third thin film transistor (TFT) T3 is closed, and supply voltage ELVDD provides high potential, and luminous signal line En provides low electricity
Position, the 4th thin film transistor (TFT) T4 and the 5th thin film transistor (TFT) T5 are opened, the second thin film transistor (TFT) T2, the 6th thin film transistor (TFT) T6 and
7th thin film transistor (TFT) T7 is in the open state, and Organic Light Emitting Diode D1 shines,
The electric current of Organic Light Emitting Diode D1 is flowed through at this time are as follows:
IOLED=K [VELVDD- Vdata+Vth6-Vth2] ^2
When T2 and T1 are total grid mirrors, Vth6-Vth2=0；
Wherein K is the structural parameters of thin film transistor (TFT), and for mutually isostructural thin film transistor (TFT), K value is relatively stable；Vth6
For the threshold voltage of the 6th thin film transistor (TFT) T6, Vdata is the voltage that data-signal Data is provided；VELVDDFor supply voltage.
It is calculated from the above analysis it is found that the second thin film transistor (TFT) T2 of the threshold value voltage compensation of the 6th thin film transistor (TFT) T6 is
The threshold value voltage for driving thin film transistor (TFT), passes through the electric current of Organic Light Emitting Diode D1 and cutting off from for the second thin film transistor (TFT) T2
Threshold voltage is unrelated.
And above-mentioned AMOLED sequential control circuit reduces scan signal line and reference voltage signal line and reduces panel
Internal wiring is to adapt to the pixel space of small size.
Specifically, scan control signal line Sn is the signal having more than or equal to two pulses, includes at least all rows
The pulse of the pulse of same time and a progressive scan.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
Bright spirit and scope.In this way, if these modifications and changes of the present invention belongs to the claims in the present invention and its equivalent technologies
Within the scope of, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of AMOLED sequential control circuit, which is characterized in that including first film transistor (T1), the second thin film transistor (TFT)
(T2), third thin film transistor (TFT) (T3), the 4th thin film transistor (TFT) (T4), the 5th thin film transistor (TFT) (T5), capacitor (C1) and organic
Light emitting diode (D1)；
The grid of the first film transistor (T1) is electrically connected at scan control signal line (Sn), and first end is electrically connected at
Data signal line (Data), second end are electrically connected at first node (N1)；
The grid of second thin film transistor (TFT) (T2) is electrically connected at second node (N2), and first end is electrically connected at first segment
Point (N1), second end are electrically connected at third node (N3)；
The grid of the third thin film transistor (TFT) (T3) is electrically connected at scan control signal line (Sn), and first end is electrically connected at
Second node (N2), second end are electrically connected at third node (N3)；
The grid of 4th thin film transistor (TFT) (T4) is electrically connected at luminous signal line (En), and first end is electrically connected at power supply
Voltage (ELVDD), second end are electrically connected at first node (N1)；
The grid of 5th thin film transistor (TFT) (T5) is electrically connected at luminous signal line (En), and first end is electrically connected at third
Node (N3), second end are electrically connected at the anode of Organic Light Emitting Diode (D1)；
The first end of the capacitor (C1) is electrically connected at second node (N2)；Second end is electrically connected at supply voltage
(ELVDD)；
The anode of the Organic Light Emitting Diode (D1) is electrically connected at the second end of the 5th thin film transistor (TFT) (T5), and cathode connects
Ground；
Second thin film transistor (TFT) (T2) is driving thin film transistor (TFT).
2. AMOLED sequential control circuit according to claim 1, which is characterized in that further include:
The 7th thin film transistor (TFT) (T7) being set between first film transistor (T1) second end and first node (N1), it is described
The grid of 7th thin film transistor (TFT) (T7) is electrically connected at second node (N2), and first end is electrically connected at first film transistor
(T1) second end, second end are electrically connected at first node (N1)；
The 6th thin film transistor (TFT) being set between first film transistor (T1) second end and third thin film transistor (TFT) (T3)
(T6), the grid of the 6th thin film transistor (TFT) (T6) be electrically connected at second node (N2) and capacitor (C1) first end and
With the second thin film transistor (TFT) (T2) common gate, first end is electrically connected at first film transistor (T1) second end, and second
End is electrically connected at the second end and third node (N3) of third thin film transistor (TFT) (T3).
3. AMOLED sequential control circuit according to claim 2, which is characterized in that the first film transistor
(T1), the second thin film transistor (TFT) (T2), third thin film transistor (TFT) (T3), the 4th thin film transistor (TFT) (T4), the 5th thin film transistor (TFT)
(T5), the 6th thin film transistor (TFT) (T6), the 7th thin film transistor (TFT) (T7) are that low-temperature polysilicon film transistor, oxide are partly led
Body thin film transistor or amorphous silicon film transistor.
4. AMOLED sequential control circuit according to claim 2, which is characterized in that the 6th thin film transistor (TFT) (T6)
It is symmetrical arranged with the second thin film transistor (TFT) (T2), and the channel width of the two is identical.
5. AMOLED sequential control circuit according to claim 1, which is characterized in that the scan control signal line (Sn)
Input terminal and the input terminal of luminous signal line (En) be equipped with the connection terminal for connecting with external sequence controller.
6. a kind of sequential control method of AMOLED sequential control circuit as described in any one in claim 1-5, feature exist
In, comprising:
Into initial phase, supply voltage (ELVDD) is in an off state, luminous signal line (En) offer low potential, and the 4th
Thin film transistor (TFT) (T4) and the 5th thin film transistor (TFT) (T5) are opened, and the voltage of third node (N3) is equal to Organic Light Emitting Diode
(D1) voltage of anode, scan control signal line (Sn) provide low potential, first film transistor (T1) and third film crystal
It manages (T3) to open, the voltage of second node (N2) is equal to the voltage of Organic Light Emitting Diode (D1) anode, the second thin film transistor (TFT)
(T2) it opens, supply voltage (ELVDD) is in an off state, data signal line (Data) is in an off state or provides low electricity
Position passes through no current in Organic Light Emitting Diode (D1), and Organic Light Emitting Diode (D1) does not shine；
Into the adjusting stage, at the end of the adjusting stage, supply voltage (ELVDD) is in an off state or provides high potential shape
State, luminous signal line (En) provide high potential, and the 4th thin film transistor (TFT) (T4) and the 5th thin film transistor (TFT) (T5) are closed, You Jifa
Optical diode (D1) does not shine, and scan control signal line (Sn) provides high potential, first film transistor (T1) and third film
Transistor (T3) is closed, and the voltage of second node (N2) keeps equal to the voltage of Organic Light Emitting Diode (D1) anode, and second is thin
Film transistor (T2) is opened；
Into data write phase, supply voltage (ELVDD) is in an off state, and luminous signal line (En) provides high potential, the
Four thin film transistor (TFT)s (T4) and the 5th thin film transistor (TFT) (T5) are closed, and Organic Light Emitting Diode (D1) does not shine, scan control letter
Number line (Sn) provides low potential, and first film transistor (T1) and third thin film transistor (TFT) (T3) are opened, data signal line
(Data) high potential is provided, the voltage that data signal line (Data) is provided, the second thin film transistor (TFT) is written in second node (N2)
(T2) it closes；
Into the stage of holding, supply voltage (ELVDD) is in an off state or provides high potential state, and luminous signal line (En) mentions
For high potential, the 4th thin film transistor (TFT) (T4) and the 5th thin film transistor (TFT) (T5) are closed, and Organic Light Emitting Diode (D1) does not shine,
Scan control signal line (Sn) provides high potential, and first film transistor (T1) and third thin film transistor (TFT) (T3) are closed, and second
The voltage that node (N2) keeps the data signal line (Data) of data write phase write-in to provide, the second thin film transistor (TFT) (T2) close
It closes；
Into the driving stage, scan control signal line (Sn) provides high potential, and first film transistor (T1) and third film are brilliant
Body pipe (T3) is closed, and supply voltage (ELVDD) provides high potential, and luminous signal line (En) provides low potential, the 4th film crystal
It manages (T4) and the 5th thin film transistor (TFT) (T5) is opened, the second thin film transistor (TFT) (T2) is in the open state, Organic Light Emitting Diode
(D1) it shines.
7. sequential control method according to claim 6, which is characterized in that
The above-mentioned adjusting stage includes:
In the first adjustment stage, supply voltage (ELVDD) is in an off state, and luminous signal line (En) provides low potential, and the 4th is thin
Film transistor (T4) and the 5th thin film transistor (TFT) (T5) are opened, and scan control signal line (Sn) provides high potential, and the first film is brilliant
Body pipe (T1) and third thin film transistor (TFT) (T3) are closed, and the voltage of second node (N2) keeps equal to Organic Light Emitting Diode (D1)
The voltage of anode, the second thin film transistor (TFT) (T2) is in the open state but passes through without electric current, at this time Organic Light Emitting Diode
(D1) it does not shine；
In the second adjustment stage, supply voltage (ELVDD) is in an off state or provides high potential state, and luminous signal line (En) mentions
For high potential, the 4th thin film transistor (TFT) (T4) and the 5th thin film transistor (TFT) (T5) are closed, and Organic Light Emitting Diode (D1) does not shine,
Scan control signal line (Sn) provides high potential, and first film transistor (T1) and third thin film transistor (TFT) (T3) are closed, and second
The voltage of node (N2) keeps equal to the voltage of Organic Light Emitting Diode (D1) anode, and the second thin film transistor (TFT) (T2) is opened.
8. sequential control method according to claim 6, which is characterized in that when AMOLED sequential control circuit includes the 6th
Thin film transistor (TFT) (T6) and when the 7th thin film transistor (TFT) (T7):
In above-mentioned initial phase, supply voltage (ELVDD) is in an off state, and luminous signal line (En) provides low potential, the
Four thin film transistor (TFT)s (T4) and the 5th thin film transistor (TFT) (T5) are opened, and the voltage of third node (N3) is equal to Organic Light Emitting Diode
(D1) voltage of anode, scan control signal line (Sn) provide low potential, first film transistor (T1) and third film crystal
It manages (T3) to open, the voltage of second node (N2) is equal to the voltage of Organic Light Emitting Diode (D1) anode, the second thin film transistor (TFT)
(T2), the 6th thin film transistor (TFT) (T6) and the 7th thin film transistor (TFT) (T7) are opened, supply voltage (ELVDD) is in an off state,
Data signal line (Data) it is in an off state or provide low potential pass through no current,
Organic Light Emitting Diode (D1) does not shine；
In the above-mentioned adjusting stage, at the end of the adjusting stage, supply voltage (ELVDD) is in an off state or provides high potential
State, luminous signal line (En) provide high potential, and the 4th thin film transistor (TFT) (T4) and the 5th thin film transistor (TFT) (T5) are closed, organic
Light emitting diode (D1) does not shine, and scan control signal line (Sn) provides high potential, and first film transistor (T1) and third are thin
Film transistor (T3) is closed, and the voltage of second node (N2) keeps equal to the voltage of Organic Light Emitting Diode (D1) anode, and second
Thin film transistor (TFT) (T2), the 6th thin film transistor (TFT) (T6) and the 7th thin film transistor (TFT) (T7) are opened；
In above-mentioned data write phase, supply voltage (ELVDD) is in an off state, and luminous signal line (En) provides high potential,
4th thin film transistor (TFT) (T4) and the 5th thin film transistor (TFT) (T5) are closed, scan control signal line (Sn) offer low potential, and first
Thin film transistor (TFT) (T1) and third thin film transistor (TFT) (T3) are opened, and data signal line (Data) provides high potential, and the 6th film is brilliant
Body pipe (T6) is first in opening state, and the voltage that data signal line (Data) provides is through first film transistor (T1), the 6th
Thin film transistor (TFT) (T6) and third thin film transistor (TFT) (T3) write-in second node (N2), when second node (N2) i.e. the 6th film is brilliant
The voltage of body pipe (T6) grid reach the 6th thin film transistor (TFT) (T6) after Vdata+Vth6 close, the second thin film transistor (TFT) (T2) and
7th thin film transistor (TFT) (T7) is closed, and wherein Vth6 is the threshold voltage of the 6th thin film transistor (TFT) (T6), and Vdata is data-signal
(Data) voltage provided；
In the above-mentioned holding stage, supply voltage (ELVDD) is in an off state or provides high potential state, luminous signal line (En)
High potential is provided, the 4th thin film transistor (TFT) (T4) and the 5th thin film transistor (TFT) (T5) are closed, and Organic Light Emitting Diode (D1) is not sent out
Light, scan control signal line (Sn) provide high potential, and first film transistor (T1) and third thin film transistor (TFT) (T3) are closed, the
The voltage that the voltage of two nodes (N2) keeps the data signal line (Data) of data write phase write-in to provide, the second film crystal
(T2), the 6th thin film transistor (TFT) (T6) and the 7th thin film transistor (TFT) (T7) is managed to close；
In the above-mentioned driving stage, scan control signal line (Sn) provides high potential, first film transistor (T1) and third film
Transistor (T3) is closed, and supply voltage (ELVDD) provides high potential, and luminous signal line (En) provides low potential, and the 4th film is brilliant
Body pipe (T4) and the 5th thin film transistor (TFT) (T5) are opened, the second thin film transistor (TFT) (T2), the 6th thin film transistor (TFT) (T6) and the 7th
Thin film transistor (TFT) (T7) is in the open state, and Organic Light Emitting Diode (D1) shines.
9. sequential control method according to claim 8, which is characterized in that when AMOLED sequential control circuit includes the 6th
Thin film transistor (TFT) (T6) and when the 7th thin film transistor (TFT) (T7):
The above-mentioned adjusting stage includes:
In the first adjustment stage, supply voltage (ELVDD) is in an off state, and luminous signal line (En) provides low potential, and the 4th is thin
Film transistor (T4) and the 5th thin film transistor (TFT) (T5) are opened, and scan control signal line (Sn) provides high potential, and the first film is brilliant
Body pipe (T1) and third thin film transistor (TFT) (T3) are closed, and the voltage of second node (N2) keeps equal to Organic Light Emitting Diode (D1)
The voltage of anode, the second thin film transistor (TFT) (T2), the 6th thin film transistor (TFT) (T6) and the 7th thin film transistor (TFT) (T7) are opened, and second
No current passes through in thin film transistor (TFT) (T2), and Organic Light Emitting Diode (D1) does not shine at this time；
In the second adjustment stage, supply voltage (ELVDD) is in an off state or provides high potential state, and luminous signal line (En) mentions
For high potential, the 4th thin film transistor (TFT) (T4) and the 5th thin film transistor (TFT) (T5) are closed, and Organic Light Emitting Diode (D1) does not shine,
Scan control signal line (Sn) provides high potential, and first film transistor (T1) and third thin film transistor (TFT) (T3) are closed, and second
The voltage of node (N2) keeps equal to the voltage of Organic Light Emitting Diode (D1) anode, the second thin film transistor (TFT) (T2), the 6th thin
Film transistor (T6) and the 7th thin film transistor (TFT) (T7) are opened.
10. sequential control method according to claim 6, which is characterized in that the scan control signal line (Sn) is that have
More than or equal to the signal of two pulses, including at least the pulse of pulse and the progressive scan of all row same times.
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