CN108376533A - A kind of single machine shift register and a kind of horizontal drive circuit - Google Patents
A kind of single machine shift register and a kind of horizontal drive circuit Download PDFInfo
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- CN108376533A CN108376533A CN201810213477.6A CN201810213477A CN108376533A CN 108376533 A CN108376533 A CN 108376533A CN 201810213477 A CN201810213477 A CN 201810213477A CN 108376533 A CN108376533 A CN 108376533A
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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]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Shift Register Type Memory (AREA)
Abstract
This application discloses a kind of single machine shift registers, output stage is driven including input module, clock control reverser and alternating current-direct current, the input module includes the first transmission gate, the clocked inverter includes the second transmission gate, phase inverter and the first capacitance, the alternating current-direct current driving output stage includes the second capacitance, the first exchange TFT devices, the second exchange TFT devices, the first direct current TFT modules and the second direct current TFT modules, and first transmission gate, second transmission gate and the phase inverter include the two TFT devices connected with STT structures.Since there are two signal output ports for tool in the single machine shift register of the present invention, and the two signal output ports are applicable in two kinds of output environments, it disclosure satisfy that different load requirements, overcome that exchange driving power consumption in the prior art is big and the slow-footed disadvantage of DC driven.The application further correspondingly discloses a kind of horizontal drive circuit, has the characteristics that precision is high, delay is short, low in energy consumption.
Description
Technical field
The present invention relates to electronic display technology field, more particularly to a kind of single machine shift register and a kind of row driving electricity
Road.
Background technology
OLED (Organic Light-Emitting Diodes, Organic Light Emitting Diode) is as a kind of completely new display
Technology meets the following needs to display large scale, ultra-thin, low-power consumption etc., therefore is referred to as " dreamlike display ", will become
One of 21 century most promising industry.
OLED is that organic semiconducting materials and luminescent material are noted by positive negative carrier by electrode under extraneous electric field driven
Enter and compound and realize luminous device.It is different from general liquid crystal display, OLED is a kind of all solid state active luminescent device,
Without backlight, therefore it has high contrast, ultra-thin, low-power consumption, wide viewing angle, fast response time, operating temperature range wide, easy
In realizing Flexible Displays and many advantages, such as 3D display.According to structure difference, OLED can be divided into passive type (Passive
Matrix) and two kinds of active (Active Matrix), i.e. PMOLED and AMOLED.The structure of PMOLED is simple, production is simple
Easily, at low cost, it is suitble to small-size screen to show, and AMOLED is because be added to additional thin film transistor (TFT) (Thin Film
Transistor, i.e. TFT), structure and preparation are all relative complex.But due to the presence of TFT, AMOLED can realize single pixel
It accurately controls, has many advantages, such as more high refresh rate, more preferable image quality, more low-power consumption, and large scale can be met and show needs.
It realizes displayer, first has to solve the problems, such as be exactly backplane technology, that is, TFT technology.It is applicable at present
In AMOLED TFT technology mainly include non-crystalline silicon (Amorphous Silicon, i.e. a-Si), low temperature polycrystalline silicon (Low-
Temperature Polysilicon, i.e. LTPS) and non-crystal oxide semiconductor (Amorphous Oxide
Semiconductor, i.e. AOS).TFT based on a-Si has been the mainstream technology that traditional liquid crystal is shown, but its too low charge
Mobility cannot be satisfied the current drive requirements of OLED device.LTPS technology is that unique commercialization volume production of passing through is tested in the world at present
Card and the AMOLED production technology quite ripe in 4.5 generations following production line, but lack of uniformity and production technology complexity etc. lack
Point limits the possibility of its enlarged panel application, while higher preparation temperature also makes it in the Flexible Displays that will be risen
Using upper helpless.
Therefore, how a kind of scheme solving above-mentioned technical problem is provided, is that those skilled in the art need to solve at present
The problem of.
Invention content
In view of this, the purpose of the present invention is to provide a kind of high-precision, low delay, low-power consumption single machine shift register
And a kind of horizontal drive circuit.Its concrete scheme is as follows：
A kind of single machine shift register, including input module, clock control reverser and alternating current-direct current drive output stage, described
Input module includes the first transmission gate, and the clocked inverter includes the second transmission gate, phase inverter and the first capacitance, described
It includes the second capacitance, the first exchange TFT devices, the second exchange TFT devices, the first direct current TFT modules that alternating current-direct current, which drives output stage,
With the second direct current TFT modules, first transmission gate, second transmission gate and the phase inverter include being connected with STT structures
The two TFT devices connect；
Wherein, the first clock and positive supply are separately connected the control terminal and first end of second transmission gate, and described second
The second end of transmission gate and input signal port are separately connected the control terminal and input terminal of the phase inverter, the input signal end
Mouth and second clock are separately connected the first end and control terminal of first transmission gate, the second end of first transmission gate and institute
The signal trigger electrode of the first end, the first exchange TFT devices of stating the second capacitance is connected, third clock access described first
Exchange the first end of TFT devices, the second end of second end and second capacitance of the first exchange TFT devices, described the
The two exchange first ends of TFT devices, the control terminal of the first direct current TFT modules, the first output port are connected, the reverse phase
The output end of device exchanges the signal trigger electrode of TFT devices, second direct current with the first end of first capacitance, described second
The control terminal of TFT modules is connected, and the second end that the second end of first capacitance exchanges TFT devices with described second is connected to
First negative supply, the first ends of the first direct current TFT modules connect the positive supply, and the of the first direct current TFT modules
Two ends are connected with the first end of the second direct current TFT modules, second output terminal mouth, and the second of the second direct current TFT modules
It terminates into the second negative supply；
Wherein, first clock, the second clock and the third clock send out pulse, first negative electricity successively
The voltage in source is less than second negative supply.
Preferably, the input module further includes feedback TFT devices, the signal trigger electrode of the feedback TFT devices, first
End, second end are connected with the second end of second capacitance, the equalization point of first transmission gate, the third clock respectively,
Wherein, the equalization point of first transmission gate is the series connection node of two TFT devices in first transmission gate.
Preferably, the clocked inverter further includes mirror module, and the mirror module includes being connected with STT structures
Two TFT devices, the first end of the mirror module, second end respectively with the first end of first capacitance, second end phase
Even, the control terminal of the mirror module is connected with the second end of second capacitance.
Preferably, the first direct current TFT modules and the second direct current TFT modules include that three parameters are identical, same
The connected TFT devices of generic port.
Preferably, the TFT devices applied in the single machine shift register are made with AOS materials.
Preferably, the TFT devices applied in the single machine shift register are made with IGZO materials.
Preferably, first clock, the second clock, the third clock clock cycle be 60us, it is described
First clock, the second clock, the third clock clock swing range be -8~10V, the voltage of the positive supply is
The voltage of 10V, first negative supply are -8V, and the voltage of second negative supply is -6V.
Preferably, the second output terminal mouth also connects 5k Ω resistance and 50pF capacitances as load.
Correspondingly, the invention also discloses a kind of horizontal drive circuit, including described in multiple any of the above-described being sequentially distributed
Single machine shift register, wherein：
The second output terminal mouth of each single machine shift register connects load respectively；
The input signal of the input signal port welding system circuit of first single machine shift register, other described lists
The input signal port of machine shift register is connected with the first output port of the previous adjacent single machine shift register；
The first clock that first single machine shift register is connect, second clock, third clock are three by system
The clock pulses sent out successively, the first clock that other described single machine shift registers are connect, second clock, third clock difference
Second clock, third clock, the first clock connect by the previous adjacent single machine shift register.
Preferably, the horizontal drive circuit includes 2160 single machine shift registers.
The invention discloses a kind of single machine shift registers, including input module, clock control reverser and alternating current-direct current to drive
Dynamic output stage, the input module include the first transmission gate, the clocked inverter include the second transmission gate, phase inverter and
First capacitance, alternating current-direct current driving output stage include the second capacitance, the first exchange TFT devices, the second exchange TFT devices, the
One direct current TFT modules and the second direct current TFT modules, first transmission gate, second transmission gate and the phase inverter wrap
Include the two TFT devices connected with STT structures.Since there are two signal output ends for tool in the single machine shift register of the present invention
Mouthful, and the two signal output ports are applicable in two kinds of output environments, disclosure satisfy that different load requirements, overcome existing skill
Exchange that driving power consumption is big and the slow-footed disadvantage of DC driven in art.Correspondingly, by the single machine shift LD in multiple present invention
Device, which is combined together to obtain horizontal drive circuit, has the characteristics that precision is high, delay is short, low in energy consumption, and due to circuit of the present invention with
It based on TFT devices, can carry out processing together with other circuits on a glass substrate, to reduce area occupied and be processed into
This.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural topology figure of single machine shift register in the embodiment of the present invention；
Fig. 2 is a kind of structural topology figure of specific single machine shift register in the embodiment of the present invention；
Fig. 3 is a kind of timing chart of single machine shift register in the embodiment of the present invention；
Signal waveforms when Fig. 4 is a kind of single machine shift register no-load in the embodiment of the present invention；
Fig. 5 has signal waveforms when load for a kind of single machine shift register in the embodiment of the present invention；
Fig. 6 is a kind of structural topology figure of specific horizontal drive circuit in the embodiment of the present invention；
Fig. 7 has signal waveforms when load for a kind of horizontal drive circuit in the embodiment of the present invention.
Specific implementation mode
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 describes, 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.
It is shown in Figure 1 the embodiment of the invention discloses a kind of single machine shift register, including input module 1, when clock
It includes the first transmission gate 11, the clocked inverter 2 that reverser 2 and alternating current-direct current processed, which drive output stage 3, the input module,
Including the second transmission gate 21, phase inverter 22 and the first capacitance 23, alternating current-direct current driving output stage 3 includes the second capacitance 31, the
One exchange TFT devices 32, second exchange TFT devices 33, the first direct current TFT modules 34 and the second direct current TFT modules 35, and described the
One transmission gate 11, second transmission gate 21 and the phase inverter 22 include the two TFT devices connected with STT structures；
Specifically, two TFT devices refer to two TFT devices in series with the connection of STT structures, while the two TFT devices
Signal trigger electrode to be connected to whole control terminal namely the control terminal be the public signal trigger electrode of two TFT devices, this
Sample can improve switching speed and increase charging current, be a kind of TFT devices commonly circuit structure.
Wherein, the first clock CLK1 and positive supply VDD is separately connected the control terminal and first end of second transmission gate 21,
The second end and input signal port IN of second transmission gate 21 are separately connected the control terminal and input terminal of the phase inverter 22,
The input signal port IN and second clock CLK2 is separately connected the first end and control terminal of first transmission gate 11, described
The second end of first transmission gate 11 exchanges the signal triggering of TFT devices 32 with the first end of second capacitance 31, described first
Extremely it is connected, third clock CLK3 accesses the first end of the first exchange TFT devices 32, the first exchange TFT devices 32
Second end exchange the first end of TFT devices 33, first direct current with the second end of second capacitance 31, described second
The control terminal of TFT modules 34, the first output port COUT are connected, the output end of the phase inverter 22 and first capacitance 23
First end, the signal trigger electrode of the second exchange TFT devices 33, the control terminal of the second direct current TFT modules 35 it is homogeneous
Even, the second end that the second end of first capacitance 23 exchanges TFT devices 33 with described second is connected to the first negative supply VSSL,
The first end of the first direct current TFT modules 34 connects the positive supply VDD, the second end of the first direct current TFT modules 34
It is connected with the first end of the second direct current TFT modules 35, second output terminal mouth OUT, the of the second direct current TFT modules 35
Two terminate into the second negative supply VSS；
Wherein, the first clock CLK1, the second clock CLK2 and the third clock CLK3 send out pulse successively,
The voltage of the first negative supply VSSL is less than the second negative supply VSS.
It is understood that the single machine shift register in the present embodiment, there are two output ports for tool, have corresponded to two kinds not
Same output environment.Wherein, the first output port COUT exports to drive the output signal of next register, second output terminal
Mouth OUT is output to drive the drive signal of the grid of the OLED of the array of display row.Two kinds of output environments refer respectively to：It is defeated
Input stage and the output of next stage shift register is out driven to drive the OLED arrays of the row inside array of display, the former
Load is smaller, it is desirable that transmission speed is fast, and the load of the latter is larger, ensures signal output, not high to rate request.Due to this
The signal that embodiment can require both difference outputs exports respectively, therefore also referred to as multiplexing type exports.Further,
Multiple above-mentioned single machine shift registers carry out connection using two output ports, can obtain the row with individual features
Driving circuit, detail is with reference to the embodiment description hereinafter in relation to horizontal drive circuit.
Specifically, the circuit connection in the present embodiment is designed according to the requirement of above-mentioned output environment, can see
Go out, the TFT devices that can reach the present embodiment requirement are n-type device.
In alternating current-direct current drives output stage 3,32 pulling up transistor for small size of the first exchange TFT devices, drain electrode connects
Meet third clock CLK3；First direct current TFT modules 34 pull up transistor to be large-sized, and drain electrode is connected with positive supply VDD, from
And the capacitive load of clock signal is greatly reduced, the dynamic power consumption of circuit is reduced, meanwhile, and utilize the bootstrapping of the second capacitance 31
Effect enables the grid voltage of the first direct current TFT modules 34 to be rapidly reached clock highest positive level.
In addition, because alternating current-direct current driving output stage 3 needs two reverse phases and the little signal of phase difference drives, clock
The purpose of work for controlling phase inverter 2 is that alternating current-direct current driving output stage 3 can be worked normally.
Clocked inverter 2 in the present embodiment can be avoided in power consumption caused by the low level DC loop of output,
All TFT devices are connected with STT connection types, are conducive to improve switching speed in this way and are increased charging current.Second transmission
Door 21 charges for periodically open to load capacitance as the pull-up device by the first clock CLK1 controls；Phase inverter 22
As pull-down, a low level is obtained for pulling down current potential；It, can be among actual clocked inverter 2
One group of feedback STT, which is added, is used for allowing output transistor group to turn off pull-down in pull-up to reduce power consumption and output transistor group
High level is fed back in drop-down to increase drop-down depth.
The embodiment of the invention discloses a kind of single machine shift registers, including input module, clock control reverser and friendship
DC driven output stage, the input module include the first transmission gate, and the clocked inverter includes the second transmission gate, anti-
Phase device and the first capacitance, the alternating current-direct current driving output stage include the second capacitance, the first exchange TFT devices, the second exchange TFT devices
Part, the first direct current TFT modules and the second direct current TFT modules, first transmission gate, second transmission gate and the phase inverter
Include the two TFT devices connected with STT structures.Since there are two signals to export for tool in the single machine shift register of the present invention
Port, and the two signal output ports are applicable in two kinds of output environments, disclosure satisfy that different load requirements, overcome existing
Exchange that driving power consumption is big and the slow-footed disadvantage of DC driven in technology.Correspondingly, the single machine displacement in multiple present invention is posted
Storage, which is combined together to obtain horizontal drive circuit, has the characteristics that precision is high, delay is short, low in energy consumption, and due to circuit of the present invention
Based on TFT devices, it can carry out processing together with other circuits on a glass substrate, to reduce area occupied and processing
Cost.
The embodiment of the invention discloses a kind of specific single machine shift registers, relative to a upper embodiment, the present embodiment
Further instruction and optimization have been made to technical solution.Specifically：
The input module 1 further includes feedback TFT devices, the feedback signal trigger electrode of TFT devices, first end, the
Two ends are connected with the second end of second capacitance 31, the equalization point of first transmission gate 11, third clock CLK3 respectively,
In, the equalization point of first transmission gate 11 is the series connection node of two TFT devices in first transmission gate 11.
In addition, the clocked inverter 2 further includes mirror module, the mirror module includes being connected with STT structures
Two TFT devices, the first end of the mirror module, second end respectively with the first end of first capacitance 23, second end
It is connected, the control terminal of the mirror module is connected with the second end of second capacitance 31.
Further, the first direct current TFT modules 34 and the second direct current TFT modules 35 include three parameter phases
TFT devices that are same, being connected with generic port.
It is understood that being specially the line between each device by the circuit module of Fig. 1 in a upper embodiment, and add
Add feedback TFT devices, the mirror module in above description, obtains the circuit topological structure of Fig. 2.Wherein, in the first transmission gate 11
Including TFT device M1, M2, feedback TFT devices are M3, and the equalization point of the first transmission gate 11 is series connection node A, the second transmission gate 21
Include TFT device M4, M5, phase inverter 22 includes TFT device M6, M7, and mirror module includes TFT devices M8, M9, and first
The also known as M10 of TFT pipes 32 is exchanged, similarly the second exchange TFT pipes 33 are known as M11, and the first capacitance 23 is known as C1, and the second capacitance 31 claims
For C2, the first direct current TFT modules 34 are respectively M12, M14, M16 including three TFT devices, and the second direct current TFT modules 35 include
Three TFT devices are respectively M13, M15, M17.
Relative to the previous embodiment, the improvement in the present embodiment is for eliminating capacitor noise in actual circuit, obtain
More preferably signal effect.Such as the M8 and M9 of mirror module, it is to carry out balances noise to produce mirror image circuit, it can allow defeated
Go out transistor group and turn off pull-down in pull-up to reduce power consumption, moreover it is possible to output transistor group be made to feed back high level in drop-down
To increase drop-down depth.Wherein, output transistor group here refers to M4~M7.
It is understood that M10~M17 forms alternating current-direct current output stage, wherein M12, M14, M16 and M13, M15, M17 is equal
The big TFT devices that a length and width are the sum of three TFT devices can be equivalent to, as shown in Figure 1.But so big device meeting
The ill effects such as great capacitor noise and high frequency response decaying are brought, therefore in fig. 2, the TFT devices of OUT terminal are divided into three
It is a.
Specifically, below according to the pulse signal schematic diagram in the circuit topological structure and Fig. 3 of Fig. 2 in the present embodiment, it is right
The operation principle of single machine shift register is explained in detail：
(1) high level input phase：
As shown in figure 3, in this stage, clock signal clk 3 keeps low level, when input signal IN and clock signal
CLK2 saltus steps are height, and M1 and M2 are opened, and capacitance C2 is started to charge up, and node Q voltages rise, and output COUT still maintains low electricity
Flat, M10 is still completely switched off, and at the same time, 1 saltus step of clock signal clk is low, and M4 and M5 is turned off, and VDD stops to node
Qb charges, and avoids the DC loop from VDD to VSSL, when to make M6 and M7 be opened by VIN, node Qb can be pulled down rapidly
To VSSL, therefore M11 and M13 are also turned off.
(2) output driver stage：
Clock signal clk 1 keeps low level.M4 and M5 are still held off.2 saltus step of clock signal clk is low electricity
It is flat, input transistors M1 and M2 are had turned off, cut-out node Q and the circuit for inputting VIN, charge are stored in capacitance C2, meanwhile, it is defeated
It is low level to enter signal IN saltus steps, and M6 and M7 are turned off, when clock signal CLK3 saltus steps are high level, due to capacitance C2 from
Act acts on, and substantially increases the node voltage of node Q, so the voltage of COUT rapidly rises to VDD, M8 and M9 and is opened, Qb
Point continues that low level VSSL, the opening of M3 is kept to improve the voltage of node A, and M2 is completely switched off, to which capacitance C2 is occurring
Charge is maintained during bootstrapping, meanwhile, output COUT will also stack pull-up device M12, and M14, M16 are opened, VDD by M12,
M14, M16 export OUT high level and drive picture element matrix.
(3) stage is pulled down：
In this stage, clock signal clk 2 keeps low level, and CLK1 saltus steps are low, since node Q keeps high level,
Transistor M11 keeps ON state, COUT to be pulled down rapidly by M11, turns off M8 and M9, and M12, M14, M16 are complete switched off, and cuts off
Positive supply VDD is to the charge circuit of output OUT, and at the same time, 1 saltus step of clock signal clk is high level, opens M4 and M5,
Make positive supply VDD pass through M4 and M5 to charge to Qb points, improves the voltage of Qb points rapidly, M11 and M13 is opened, maintain output
The low level of COUT, and output OUT is pulled down into VSS.
(4) low level is kept for the stage：
CLK2 saltus steps are height, open M1 and M2, node Q is discharged by M1 and M2 to VIN, to make Q points also pulled down to
VSSL, before the arrival of next commencing signal, CLK2 periodically opens M1 and M2, and Q points is made to remain the low level of VSSL.
In addition, since CLK1 periodically opens M4 and M5, VDD is set periodically to charge to capacitance C1, to ensure that node Qb exists
Entire low level is kept for the stage can keep high level, and M11 and M13, M15, M17 is made to be in depth linear zone, so COUT is protected
The low level for holding VSSL, M12 is complete switched off, and output OUT keeps stable low level output.
The embodiment of the invention discloses a kind of specific single machine shift registers, relative to a upper embodiment, the present embodiment
Further instruction and optimization have been made to technical solution.Specifically：
The TFT devices applied in the single machine shift register are made with AOS materials.
It is understood that general circuit is all based on the characteristic design of material and device, and circuit is worked
Cheng Bixu executes competence exertion better performance by specific material and device.In the present invention, in single machine shift register
The TFT devices used need have good electric property, and single machine shift register to be made to work, and meet circuit requirement
TFT devices can only be N-shaped conduction.
Further, since the technology prepared on a glass substrate is more convenient and ripe, can select with
TFT devices used in the AOS material preparation present invention.
Preferably, the TFT devices applied in the single machine shift register are made with IGZO materials.
The AOS materials such as ITO (indium tin oxide), AZO (ZnO that Al is obtained is adulterated in ZnO systems) and IZO (indium zinc oxide)
Material has applied to preparation TFT devices.These AOS materials are when in applied to display technology, the transparency of material itself, current-carrying
Transport factor, quantum efficiency and preparation complexity etc. are selector influence factors needed to be considered.Wherein IGZO is AOS
Carrier mobility is relatively high among material, and the mechanical property of light transmittance and thin-film material is also proper, large scale
The technology path of preparation is also easier to realize, it is possible to IGZO be selected to prepare material as the TFT of the invention.
Other AOS materials can certainly be used instead, since the electrical parameter of material is different, TFT device parameters can be allowed to produce
Changing, so to change the length-width ratio of each TFT inside circuit to realize.But these AOS material preparation material TFT devices
The structure of part is the same.That is, use other AOS materials instead, and circuit design need not be changed, it is only necessary to change device
Size can.Wherein, the size of TFT devices namely the length-width ratio of TFT devices, determine the channel length of TFT devices
And width, to determine the size of current by TFT devices.According to the specific requirements of circuit design such as resolution ratio, loads, prolongs
When etc., judge the current requirements of TFT devices, then selects the size of corresponding TFT devices.
Specifically, the size of M1 and M2 is identical, the size of M4 and M5 is identical, and the size of M6 and M7 is identical, M12, M14, M16
Size it is identical, the size of M13, M15, M17 are identical.
For example, can select that the single machine shift register of the present embodiment will be applied to TFT devices made of IGZO materials,
Its dimensional parameters table specific as follows：
Correspondingly, environmental parameter can also be carried out according to the following table for setting：
That is, the clock cycle of the first clock CLK1, the second clock CLK2, the third clock CLK3 are
60us, the first clock CLK1, the second clock CLK2, the third clock CLK3 clock swing range be -8~10V,
The voltage of the positive supply VDD is 10V, and the voltage of the first negative supply VSSL is -8V, the electricity of the second negative supply VSS
Pressure is -6V.
Wherein, the second output terminal mouth also connects 5k Ω resistance and 50pF capacitances as load.
No-load emulation is carried out to the single machine shift register configured according to above-mentioned parameter.No-load is exactly no loading,
Load resistance is considered as infinity, output waveform should be the waveform being exceedingly fast a rise time, almost step, nothing
The emulation for carrying situation is for verifying whether circuit is to be run according to designed mode.Coherent signal in the case of no-load
Oscillogram is as indicated, be that 7us can be in no-load after rise/fall time is the signal IN of 200ns in one pulsewidth of input
In the case of successfully export COUT signals and OUT signal, wherein COUT signals are 10V, OUT signal 9V, two output signals
The amplitude of oscillation is above the 80% of supply voltage.
The single machine shift register has been carried out again to carry emulation.It is understood that it is that output connects loaded feelings to have load
Condition, the load of COUT signals are the input terminals of next stage shift register, and the parameters such as resistance capacitance are to see that next stage displacement is posted
The circuit structure and device parameters of the input terminal of storage.The load of OUT signal is the grid of row OLED, and 4K resolution ratio a line has
The grid composition of 4096 OLED, it is difficult the load driven that can regard one as.The present invention calculates when designing output stage
Load parameter used is R=5k Ω, C=50pF, which is the equivalence value of 4096 OLED grids, is by certain company
What the technological parameter of offer was calculated.Whether the emulation for carrying situation is can be with when real work for verifying circuit
Normal work.Have the waveform correlation in the case of carrying shown in Figure 5, be 7us in one pulsewidth of input, rise fall time be
After the signal IN of 200ns, COUT signals and OUT signal can be successfully exported in the case that carrying.
Correspondingly, the invention also discloses a kind of horizontal drive circuit, including described in multiple any of the above-described being sequentially distributed
Single machine shift register, wherein：
The second output terminal mouth of each single machine shift register connects load respectively；
The input signal of the input signal port welding system circuit of first single machine shift register, other described lists
The input signal port of machine shift register is connected with the first output port of the previous adjacent single machine shift register；
The first clock that first single machine shift register is connect, second clock, third clock are three by system
The clock pulses sent out successively, the first clock that other described single machine shift registers are connect, second clock, third clock difference
Second clock, third clock, the first clock connect by the previous adjacent single machine shift register.
Fig. 6 is the horizontal drive circuit being attached by taking three single machine shift registers as an example, but actually this reality
Apply number of the horizontal drive circuit in example for single machine shift register, it is not required that must be 3 multiple.It is shown in Figure 7
A horizontal drive circuit in each OUT signal simulation waveform, which includes that 12 loaded single machines move
Bit register.
Wherein, when horizontal drive circuit is applied to 4k resolution ratio, the horizontal drive circuit includes that 2160 single machines move
Bit register.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that
A little elements, but also include other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
A kind of single machine shift register provided by the present invention is described in detail with horizontal drive circuit above, herein
In apply specific case principle and implementation of the present invention are described, the explanation of above example is only intended to sides
Assistant solves the method and its core concept of the present invention；Meanwhile for those of ordinary skill in the art, think of according to the present invention
Think, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as pair
The limitation of the present invention.
Claims (10)
1. a kind of single machine shift register, which is characterized in that driven including input module, clock control reverser and alternating current-direct current defeated
Go out grade, the input module includes the first transmission gate, and the clocked inverter includes the second transmission gate, phase inverter and first
Capacitance, the alternating current-direct current driving output stage exchange TFT devices, first directly including the second capacitance, the first exchange TFT devices, second
Flow TFT modules and the second direct current TFT modules, first transmission gate, second transmission gate and the phase inverter include with
Two TFT devices of STT structures connection；
Wherein, the first clock and positive supply are separately connected the control terminal and first end of second transmission gate, second transmission
The second end and input signal port of door are separately connected the control terminal and input terminal of the phase inverter, the input signal port and
Second clock is separately connected the first end and control terminal of first transmission gate, the second end of first transmission gate and described the
The first end of two capacitances, the signal trigger electrode of the first exchange TFT devices are connected, third clock access first exchange
The first end of TFT devices, the second end of the first exchange TFT devices are handed over the second end of second capacitance, described second
The first end of TFT devices, the control terminal of the first direct current TFT modules, the first output port is flowed to be connected, the phase inverter
Output end exchanges the signal trigger electrode of TFT devices, the second direct current TFT with the first end of first capacitance, described second
The control terminal of module is connected, and the second end that the second end of first capacitance exchanges TFT devices with described second is connected to the
One negative supply, the first end connection positive supply of the first direct current TFT modules, the second of the first direct current TFT modules
End is connected with the first end of the second direct current TFT modules, second output terminal mouth, the second end of the second direct current TFT modules
Access the second negative supply；
Wherein, first clock, the second clock and the third clock send out pulse successively, first negative supply
Voltage is less than second negative supply.
2. single machine shift register according to claim 1, which is characterized in that the input module further includes feedback TFT devices
Part, the feedback signal trigger electrode of TFT devices, first end, second end respectively with the second end of second capacitance, described the
The equalization point of one transmission gate, the third clock are connected, wherein the equalization point of first transmission gate is first transmission gate
In two TFT devices series connection node.
3. single machine shift register according to claim 2, which is characterized in that the clocked inverter further includes mirror image
Module, the mirror module include the two TFT devices connected with STT structures, first end, the second end point of the mirror module
It is not connected with first end, the second end of first capacitance, the control terminal of the mirror module and the second of second capacitance
End is connected.
4. according to any one of claims 1 to 3 single machine shift register, which is characterized in that the first direct current TFT modules
Include that three parameters are identical, the TFT devices that are connected with generic port with the second direct current TFT modules.
5. single machine shift register according to claim 4, which is characterized in that applied in the single machine shift register
TFT devices are made with AOS materials.
6. single machine shift register according to claim 5, which is characterized in that applied in the single machine shift register
TFT devices are made with IGZO materials.
7. single machine shift register according to claim 6, which is characterized in that first clock, the second clock, institute
The clock cycle for stating third clock is 60us, first clock, the second clock, the third clock clock swing range
It is -8~10V, the voltage of the positive supply is 10V, and the voltage of first negative supply is -8V, second negative supply
Voltage is -6V.
8. single machine shift register according to claim 7, which is characterized in that the second output terminal mouth is also connected 5k Ω electricity
Resistance and 50pF capacitances are as load.
9. a kind of horizontal drive circuit, which is characterized in that including multiple lists as described in any one of claim 1 to 8 being sequentially distributed
Machine shift register, wherein：
The second output terminal mouth of each single machine shift register connects load respectively；
The input signal of the input signal port welding system circuit of first single machine shift register, other described single machines move
The input signal port of bit register is connected with the first output port of the previous adjacent single machine shift register；
The first clock that first single machine shift register is connect, second clock, third clock be three by system successively
The clock pulses sent out, before the first clock that other described single machine shift registers are connect, second clock, third clock are respectively
Second clock, third clock, the first clock that one adjacent single machine shift register is connect.
10. horizontal drive circuit according to claim 9, which is characterized in that the horizontal drive circuit includes 2160 lists
Machine shift register.
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| CN201810213477.6A CN108376533B (en) | 2018-03-15 | 2018-03-15 | Single-machine shift register and line driving circuit |
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| CN201810213477.6A CN108376533B (en) | 2018-03-15 | 2018-03-15 | Single-machine shift register and line driving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227175A1 (en) * | 2020-05-13 | 2021-11-18 | 武汉华星光电技术有限公司 | Driving circuit and display panel |
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| CN1866341A (en) * | 2005-05-20 | 2006-11-22 | 株式会社半导体能源研究所 | Display device and electronic device |
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| CN108376533B (en) | 2020-02-07 |
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