CN108962119A - Level shifter and its driving method, display device - Google Patents
Level shifter and its driving method, display device Download PDFInfo
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- CN108962119A CN108962119A CN201810862059.XA CN201810862059A CN108962119A CN 108962119 A CN108962119 A CN 108962119A CN 201810862059 A CN201810862059 A CN 201810862059A CN 108962119 A CN108962119 A CN 108962119A
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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
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Abstract
The invention discloses a kind of level shifter and its driving methods, display device.The circuit includes: level transfer sub-circuit and switch control sub-circuit, and switch control sub-circuit is connect with driving signal end, the first power end, second source end and level transfer sub-circuit.Switch control sub-circuit controls the first power end and second source end and level transfer sub-circuit shutdown when driving signal end is inputted without driving signal.It that is to say that sub-circuit input power signal is shifted without normal direction level in the first power end and second source end, level transfer sub-circuit does not generate quiescent current.Relative to when no driving signal inputs, to level transfer sub-circuit input power signal, level shifts sub-circuit and generates quiescent current for the first power end and second source end.Level transfer sub-circuit quiescent current of the invention reduces, and the discharge time at the first power end and second source end extends, and residual charge can be released effectively, and improves band phenomenon.The display effect of the display device is preferable.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of level shifter and its driving method, display device.
Background technique
Display device generally comprises the luminous gate driving circuit of driving pixel unit, and gate driving circuit can drive
Under the control of signal, gate drive signal is inputted to pixel unit.But the driving signal due to being supplied to gate driving circuit
The current potential of (such as clock signal or open signal) is lower, possibly the transistor in gate driving circuit can not be made sufficiently to open,
Therefore multiple level shifters can be generally set, wherein each level shifter can will all the way driving signal amplification after,
It is available to gate driving circuit.
In the related technology, in order to be adapted to the gate driving circuits of various structures, the level transfer being arranged in display device
The quantity of circuit generally can be more than the number at driving signal end in gate driving circuit.Wherein, each level shifter can be with
It is connect with the first power end and second source end, which can input the first power supply letter to level shifter
Number, the second source end can to level shifter input second electrification source signal, the level shifter can this two
Amplify driving signal under the control of a power supply signal.And work as first power end and second source end to the level shifter
When input power signal, quiescent current can be generated in the level shifter, the size of the quiescent current and the first power end and
The discharge time at second source end is directly proportional.
But due to level shifter in the related technology regardless of whether by using, first power end and the second electricity
Source can that is to say that the level shifter being not used by can also generate Static Electro to level shifter input power signal
Stream.Therefore the quiescent current that will cause the level shifter that display device includes is larger, correspondingly, first power end and the
The discharge time of two power ends i.e. can be smaller.Display device is under the lower environment of temperature, due to the crystalline substance in gate driving circuit
The residual charge that body pipe degradation generates possibly can not be released effectively within the shorter time, since residual charge to show
The band phenomenon that the display screen of showing device occurs can not be effectively improved, and the display effect of display device is poor.
Summary of the invention
The present invention provides a kind of level shifter and its driving methods, display device, can solve in the related technology
The poor problem of the display effect of display device, the technical solution is as follows:
In a first aspect, providing a kind of level shifter, comprising: level shifts sub-circuit and switch control sub-circuit；
The switch control sub-circuit turns with driving signal end, the first power end, second source end and the level respectively
Sub-circuit connection is moved, the switch control sub-circuit is used for when there is driving signal input at the driving signal end, described in control
First power end is connected with the first end of level transfer sub-circuit, controls the second source end and level transfer
The second end of circuit is connected, and inputs the driving signal, the switch control to the third end of level transfer sub-circuit
Sub-circuit is also used to control first power end and the second source when the driving signal end is without driving signal input
End and level transfer sub-circuit shutdown；
Level transfer sub-circuit also connect with the output end, and the level transfer sub-circuit is for described the
When one power end and the second source end are connected, amplify the driving signal, and amplified driving signal is input to institute
State output end.
Optionally, the switch control sub-circuit, comprising: detection module and switch module；
The detection module is connect with the driving signal end, reference power source end and the third end respectively, the detection
Module be used to detect reference power source signal that the signal that the driving signal end provides is provided with the reference power source end whether phase
Together, when the signal of driving signal end offer is identical as the reference power source signal, the detection module determines the drive
Dynamic signal end has driving signal input, inputs the driving signal to the third end, and input and open to the switch module
Signal, when the signal and the reference power source signal that the detection module is also used to provide when the driving signal end be not identical,
It determines that the driving signal end is inputted without driving signal, and inputs cut-off signals to the switch module, wherein described with reference to electricity
Source signal is the input signal that sequence controller is provided to the level shifter；
The switch module respectively with first power end, the second source end, the first end, the second end
Connected with the third end, the switch module is used for when receiving the open signal, control first power end with
The first end conducting, controls the second source end and is connected with the second end, the switch module is also used to receiving
When the cut-off signals, first power end and the second source end and level transfer sub-circuit shutdown are controlled.
Optionally, the detection module, comprising: with door；
It is described to be connect with the first input end of door with the driving signal end, second input terminal with door and the ginseng
Power end connection is examined, it is described to be connect with the output end of door with the third end.
Optionally, the detection module, further includes: first resistor, second resistance and capacitor；
One end of the first resistor is connect with the reference power source end, the other end of the first resistor and described and door
First input end connection；
One end of the second resistance is connect with described with the first input end of door, the other end of the second resistance with connect
Ground terminal connection；
One end of the capacitor is connect with the reference power source end, and the other end of the capacitor and the ground terminal connect
It connects.
Optionally, the detection module, further includes: follower；
One end of the follower is connect with the third end, and the other end of the follower and the switch module connect
It connects.
Optionally, the switch module, comprising: the first transistor, second transistor, 3rd resistor, the 4th resistance, the 5th
Resistance and the 6th resistance；
The grid of the first transistor is connect with the third end, the first pole of the first transistor and described first
Power end connection, the second pole of the first transistor is connect with the first end；
The grid of the second transistor is connect with the third end, the first pole of the second transistor and described second
Power end connection, the second pole of the second transistor is connect with the second end；
One end of the 3rd resistor is connect with first power end, the other end of the 3rd resistor and the third
End connection；
One end of 4th resistance is connect with the first end, and the other end and the ground terminal of the 4th resistance connect
It connects；
One end of 5th resistance is connect with the second source end, the other end of the 5th resistance and the third
End connection；
One end of 6th resistance is connect with the second end, and the other end and the ground terminal of the 6th resistance connect
It connects.
Optionally, the switch module, further includes: the 7th resistance and the 8th resistance；
One end of 7th resistance is connect with the third end, the other end and the first crystal of the 7th resistance
The grid of pipe connects；
One end of 8th resistance is connect with the third end, the other end and second crystal of the 8th resistance
The grid of pipe connects.
Second aspect, provides a kind of driving method of level shifter, and the method is applied to as described in relation to the first aspect
Level shifter in, the level shifter, comprising: level shifts sub-circuit and switch control sub-circuit；The side
Method includes:
Whether switch control sub-circuit detection driving signal end has driving signal input；
When the switch control sub-circuit detects that there is driving signal input at the driving signal end, the first power supply is controlled
It holds and is connected with the first end of level transfer sub-circuit, the second end at control second source end and level transfer sub-circuit
Conducting, and the driving signal is inputted to the third end of level transfer sub-circuit, the level transfer sub-circuit is described
Under the control for the second source signal that the first power supply signal and the second source end that first power end provides provide, amplify institute
State driving signal, and by amplified driving signal input to output end；
When the switch control sub-circuit detects the driving signal end without driving signal input, control described first
Power end and the second source end and level transfer sub-circuit shutdown.
The third aspect, provides a kind of display device, and the display device includes: at least one electricity as described in relation to the first aspect
Level shifter, gate driving circuit and pixel unit；
Each driving signal end of the gate driving circuit is connect with the output end of a level shifter, institute
The output end for stating gate driving circuit is connect with the pixel unit.
Optionally, the number of the level shifter in the display device is greater than in the gate driving circuit and is arranged
The number at driving signal end.
Technical solution provided by the invention has the benefit that
The embodiment of the invention provides a kind of level shifter and its driving methods, display device.Level transfer electricity
Road includes level transfer sub-circuit and switch control sub-circuit, switch control sub-circuit can be with driving signal end, the first power supply
End, second source end are connected with level transfer sub-circuit.Switch control sub-circuit can be defeated without driving signal at driving signal end
It is fashionable, the first power end and second source end and level transfer sub-circuit shutdown are controlled, that is to say the first power end without normal direction electricity
Flat turn moves sub-circuit and inputs the first power supply signal, and second source end inputs second source signal without normal direction level transfer sub-circuit.
Correspondingly, can make that quiescent current will not be generated in level transfer sub-circuit when driving signal end is without driving signal input,
Relative in the related technology, no matter whether driving signal end has a driving signal input, the first power end and second source end to
Level shifts input power signal in sub-circuit, and level transfer sub-circuit generates quiescent current, provided in an embodiment of the present invention
The quiescent current of level transfer sub-circuit in display device reduces, correspondingly, first power end and second source end are put
The electric time extends relative to the relevant technologies, and residual charge can be released effectively within the time after extension, improves display device
The band phenomenon that occurs due to residual charge of display screen.The display effect of the display device is preferable.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of level shifter provided in an embodiment of the present invention；
Fig. 2 is the timing diagram of a kind of first power supply signal and clock signal provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another level shifter provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another level shifter provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of another level shifter provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another level shifter provided in an embodiment of the present invention；
Fig. 7 is a kind of flow chart of the driving method of level shifter provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is implemented below in conjunction with attached drawing
Mode is described in further detail.
The transistor used in all embodiments of the invention all can be thin film transistor (TFT) or field-effect tube or other characteristics
Identical device is mainly switching transistor according to transistor used by effect the embodiment of the present invention in circuit.By
It is symmetrical in the source electrode of the switching transistor used here, drain electrode, so its source electrode, drain electrode can be interchanged.In this hair
In bright embodiment, wherein it will be known as the first order by source electrode, drain electrode is known as the second level.The centre of transistor is provided by the form in attached drawing
End is grid, signal input part is source electrode, signal output end is drain electrode.In addition, switch crystal used by the embodiment of the present invention
Pipe may include any one of p-type switching transistor and N-type switching transistor, wherein p-type switching transistor is low in grid
Electric conducts end when grid is high level, and N-type switching transistor is connected when grid is high level, are low in grid
End when level.
Fig. 1 is the structural representation of level shifter provided in an embodiment of the present invention (Level Shifter, LS) a kind of
Figure, as shown in Figure 1, the level shifter may include: level transfer sub-circuit 10 and switch control sub-circuit 20.
Wherein, the switch control sub-circuit 20 can respectively with driving signal end Vin, the first power end VGH, second source
VGL and level transfer sub-circuit 10 is held to connect.As shown in figure 1, which can shift son with level respectively to example
First end P1, the second end P2 of circuit 10 are connected with third end P3.The switch control sub-circuit 20 can be at the driving signal end
When Vin has driving signal input, the first end P1 of control the first power end VGH and level transfer sub-circuit 10 is connected, and controls the
Two power end VGL are connected with the second end P2 of level transfer sub-circuit 10, and defeated to the third end P3 of level transfer sub-circuit 10
Enter the driving signal.The switch control sub-circuit 20 can also be when the driving signal end Vin be inputted without driving signal, control the
One power end VGH and second source end VGL and level transfer sub-circuit 10 turn off.
In embodiments of the present invention, in order to adapt to the gate driving circuits of various structures, quantity can be generally set more than grid
The level shifter at driving signal end in the driving circuit of pole, therefore the driving signal end Vin of level shifter might have
The case where no driving signal inputs, that is to say that the I/O channel (channel) of level shifter may be not used by
The case where.Wherein, which can refer in level shifter between driving signal end Vin and output end OUT
Signal transmission channels.The I/O channel, which is not used by, refers to that driving signal end Vin is inputted without driving signal, correspondingly,
The case where output end OUT is also exported without amplified driving signal.
In the related technology, even if driving signal end Vin is inputted without driving signal, level shifter is not used by, and first
Power end VGH and second source end VGL can be connected with the level shifter, and that is to say can shift sub-circuit 10 to level
Input power signal, level transfer sub-circuit 10 can generate quiescent current.The level shift sub-circuit 10 quiescent current compared with
Greatly.The quiescent current refers to the electric current inside level transfer sub-circuit 10.When the level transfer sub-circuit 10 quiescent current compared with
When big, the power down time that will cause the first power end VGH and second source end VGL reduces.Power down time refers to display device
The time that signal end discharges after executing power-off operation.Due to the burst size of residual charge that is generated in display device and
Power down time is directly proportional, that is to say that power down time is longer, and residual charge discharges more；Power down time is shorter, and residual charge is released
What is put is fewer.Therefore when the power down time is shorter, the residual charge generated on the display screen of display device is possibly can not be at this
It is released effectively in shorter power down time, display device can not be effectively improved due to the band phenomenon that residual charge occurs.
And in embodiments of the present invention, level shifter includes switch control sub-circuit 20, the switch control sub-circuit
20 can control the first power end VGH and second source end VGL and level when driving signal end Vin is inputted without driving signal
It shifts sub-circuit 10 to turn off, that is to say when level shifter is not used by, the first power end VGH shifts son without normal direction level
Circuit 10 inputs the first power supply signal, and second source end VGL also inputs second source signal without normal direction level transfer sub-circuit 10,
Correspondingly, level transfer sub-circuit 10 will not generate quiescent current.Level provided in an embodiment of the present invention shifts sub-circuit 10
Quiescent current it is smaller.The power down time of the first power end VGH and second source end VGL increase, and that is to say, can extend this
The discharge time of first power end VGH and second source end VGL, residual charge can have within the discharge time after the extension
Effect release, so as to be effectively improved the band phenomenon of display device.
It is exemplary, it is assumed that be provided with 14 level in display device and shift sub-circuit 10, wherein 12 level transfer son electricity
Road 10 is for being supplied to gate driving circuit after amplifying CLK signal, 2 level transfer sub-circuits 10 are for putting STV signal
Gate driving circuit is supplied to after big.Assuming that the gate driving circuit in display device is 19T1C structure (i.e. by 19 transistors
Formed with 1 capacitor), need to use 11 driving signal ends (including 10 clock signal terminal CLK and 1 open signal
Hold STV).Therefore after 11 driving signal ends of the gate driving circuit being connected with corresponding level transfer sub-circuit 10, meeting
The remaining 2 level transfer sub-circuits 10 and 1 for amplifying CLK signal are used to amplify the level transfer word circuit of STV signal
10 input without driving signal.At this time switch control sub-circuit 01 can control the first power end VGH and second source end VGL with
Remaining 3 level transfer sub-circuit 10 turns off.The first power end VGH remaining 3 level transfer without normal direction at this time
Sub-circuit 10 inputs the first power supply signal, and without normal direction, remaining 3 level transfer sub-circuit 10 inputs the second source end VGL
Second source signal.
With reference to Fig. 1, level transfer sub-circuit 10 can also be connect with output end OUT, which shifts sub-circuit 10 can
To amplify driving signal, and amplified driving signal is defeated when being connected with the first power end VGH and second source end VGL
Enter to output end OUT.
In embodiments of the present invention, level transfer sub-circuit 10 can be amplifier.When switch control sub-circuit 20 is controlled
It makes the first power end VGH to be connected with the first end P1 of level transfer sub-circuit 10, and control second source end VGL and level turn
When moving the second end P2 conducting of sub-circuit 10, level shifts the first power supply that sub-circuit 10 can be provided in the first power end VGH
Under the control for the second source signal that signal and second source end VGL are provided, amplification switch control sub-circuit 20 is input to third
The driving signal of P3 is held, and by amplified driving signal input to output end OUT.Output end OUT can be amplified by this
Driving signal is input to gate driving circuit, so that gate driving circuit be driven to work.Correspondingly, working as switch control sub-circuit 20
Control the first power end VGH and second source end VGL and when level transfer sub-circuit 10 turns off, the first power end VGH and the
Two power end VGL shift 10 input power signal of sub-circuit without normal direction level, correspondingly, level transfer sub-circuit 10 is i.e. not
Quiescent current can be generated.
It is exemplary, it is assumed that the current potential for the first power supply signal that the first power end VGH is provided is 30 volts (V), second source
The current potential for the second source signal for holding VGL to provide is -7V, the variation model of the current potential for the driving signal that driving signal end Vin is provided
Enclose is 0 to 3.3V.When the first end P1 that switch control sub-circuit 20 controls the first power end VGH and level transfer sub-circuit 10 is led
Logical, and when controlling second source end VGL and being connected with the second end P2 of level transfer sub-circuit 10, level transfer sub-circuit 10 can be with
According to first power supply signal and second source signal, the variation range of the current potential of driving signal is amplified to -7V by 0 to 3.3V
To 30V, and input to output end OUT.It that is to say the change for being finally-transmitted to the current potential of gate drive signal of gate driving circuit
Changing range is -7V to 30V.
In conclusion level shifter provided in an embodiment of the present invention, which includes level transfer sub-circuit and opens
Control sub-circuit is closed, which can shift with driving signal end, the first power end, second source end and level
Sub-circuit connection.The switch control sub-circuit can control the first power end when the driving signal end is inputted without driving signal
With second source end and level transfer sub-circuit shutdown, it that is to say the first power end without normal direction level transfer sub-circuit input first
Power supply signal, second source end input second source signal without normal direction level transfer sub-circuit.So that believing in driving
Number end without driving signal input when, level transfer sub-circuit in will not generate quiescent current, relative in the related technology, no matter drive
Whether dynamic signal end has driving signal input, the first power end and second source the end input power into level transfer sub-circuit
Signal, level transfer sub-circuit generate quiescent current, and the level in display device provided by the invention shifts the quiet of sub-circuit
State electric current reduces, correspondingly, the discharge time at first power end and second source end extends relative to the relevant technologies, residual electricity
Lotus can be released effectively within the time after the extension, improve the band that the display screen of display device occurs due to residual charge
Phenomenon.The display effect of the display device is preferable.
Optionally, when carrying out low temperature environment test to display device, such as test condition are as follows: in the environment of -5 degree,
A startup and shutdown movement was carried out every 3 seconds to display device, when testing, tester needs first power on
(Power on) timing is adjusted to the minimum value of defined in test specification, and it is most short to that is to say that the effective time that will be powered on is adjusted to
Time；And the minimum value that (Power off) timing is adjusted to defined in test specification will be powered off, it that is to say the effective of power-off
Time adjustment is to the shortest time.Tester has found that the gate driving circuit in display device is easy to appear power limit (Limit
Power Sequence, LPS) the problem of, it that is to say the property under the lower environment of the temperature of the transistor in gate driving circuit
It can be deteriorated, electron mobility phase strain differential, to generate charge residue phenomenon, cross occurs in the display screen in turn resulting in display device
There is blocky (block) phenomenon in line phenomenon.
The present invention shifts the quiescent current of sub-circuit 10 by reducing level, can extend the power end in display device
Power down time, such as the power down time of VGH signal or CLK signal can be extended.Fig. 2 is one kind provided in an embodiment of the present invention
The variation timing diagram of VGH signal and VGH signal.As shown in Fig. 2, needed for VGH signal in the related technology and CLK signal power down
Time is T1, and the time required for VGH signal of the invention and CLK signal power down is T2, figure it is seen that T2 is greater than T1.
By the time needed for extending VGH signal and CLK signal power down, display device can be made to discharge more residual charges, into
And be conducive to the elimination of band phenomenon either block phenomenon, improve the display effect of display device.
Optionally, in order to extend the time required for VGH signal and CLK signal power down, improve band phenomenon, level transfer
Sub-circuit 10 can also be by the way that after display device executes power-off operation, the current potential of the current potential of CLK signal or VGH signal be drawn
A up to higher current potential, then discharges again.
Fig. 3 is the structural schematic diagram of another level shifter provided in an embodiment of the present invention, as shown in figure 3, this is opened
Control sub-circuit 20 is closed, may include: detection module 201 and switch module 202.
With reference to Fig. 2, the detection module 201 can respectively with driving signal end Vin, reference power source end Vref and third end P3
Connection, the reference electricity which can detecte the signal of driving signal end Vin offer and reference power source end Vref is provided
Whether source signal is identical.When the signal that driving signal end Vin is provided is identical as reference power source signal, detection module 201 can be with
It determines that driving signal end Vin has driving signal input, is opened to third end P3 input drive signal, and to the input of switch module 202
Open signal；The detection module 201 can also be in the driving signal end Vin signal provided and not identical reference power source signal, really
Determine driving signal end Vin to input without driving signal, and inputs cut-off signals to switch module 202.
In embodiments of the present invention, the reference power source signal which provides can be by sequence controller
The input signal that (Timing Controller, Tcon) is provided to level shifter.The drive that the driving signal end Vin is provided
Dynamic signal is also to be provided by the Tcon.Also, when manufacturing display device, operator can be according to level shifter
The connection status of output end OUT and gate driving circuit, to control the output end of Tcon and the connection shape of driving signal end Vin
State, so that the driving signal end Vin that Tcon can only be connected to it provides signal.The signal that the Tcon is provided usually can be with
Including STV signal and CLK signal.
Optionally, in embodiments of the present invention, an output end of Tcon can divide two-way to be connected to each level transfer
The reference power source end Vref and driving signal end Vin of circuit.Wherein, the output end of Tcon all the way can directly with each level
The reference power source end Vref connection of transfer circuit provides input signal to reference power source end Vref；The output end of Tcon it is another
The driving signal end Vin of each level shifter can be connected to by 0 Ohmic resistance all the way, to driving signal end
Vin provides driving signal.
When the output end OUT of some level shifter is connect with gate driving circuit, operator be may not need pair
Connection relationship between Tcon and the level shifter is adjusted, and Tcon can be to the driving of the level shifter at this time
Signal end Vin and reference power source end Vref are provided which signal；When some level shifter output end OUT not with gate driving
When circuit connection, operator can be by removing 0 Ohmic resistance between Tcon and the level shifter (such as when this
Resistance is Chip-R, can not be powered on to the Chip-R), to disconnect the output end of Tcon and the drive of the level shifter
The connection of dynamic signal end Vin, allows Tcon only to provide signal to the reference power source end Vref of the level shifter, without
Signal is provided to the driving signal end Vin of the level shifter.Alternatively, the another way of the output end of Tcon can also directly with
The driving signal end Vin connection of each level shifter, when some level shifter output end OUT not with gate driving
When circuit connection, operator can be by the way that the output end of Tcon to be connect with the driving signal end Vin of the level shifter
All the way directly disconnect, allow Tcon not to the driving signal end Vin of the level shifter provide driving signal.
It is exemplary, it is assumed that the output end OUT of some level shifter and the first clock signal terminal of gate driving circuit
CLK1 connection, then Tcon can be provided which first to the driving signal end Vin and reference power source end Vref of the level shifter
Clock signal clk 1.At this point, detection module 201 can detecte the signal CLK1 of driving signal end Vin offer and with reference to electricity
The reference power source signal CLK1 that source Vref is provided is identical, can determine that driving signal end Vin has driving signal input, detect mould
Block 201 can input driving signal CLK1 to third end P3 and input open signal to switch module 202.Assuming that some is electric
The output end OUT and gate driving circuit of level shifter are not connected, then Tcon and the level can be shifted electricity by operator
0 Ohmic resistance between road removes to disconnect the connection of the output end of Tcon Yu driving signal end Vin, allow Tcon only to
The reference power source end Vref of the level shifter provides reference power source signal, without the driving signal to the level shifter
Vin is held to provide signal.At this point, driving signal end Vin no signal inputs, detection module 201 can detecte the driving signal end
The signal that Vin is provided is low level, and the reference power source signal provided with reference power source end Vref is not identical, can determine driving letter
Number end Vin without driving signal input, detection module 201 can to switch module 202 input cut-off signals.
Further, with reference to Fig. 2, the switch module 202 can respectively with the first power end VGH, second source end VGL,
First end P1, second end P2 are connected with third end P3, which can control first when receiving open signal
Power end VGH is connected with first end P1, and control second source end VGL is connected with second end P2.At this point, the first power end
VGH can shift sub-circuit 10 to level by first end P1 and input the first power supply signal, and second source end VGL can be by the
Two end P2 input second source signal to level transfer sub-circuit 10.Level transfer sub-circuit 10 can be believed according to first power supply
Number and second source signal, the driving signal that receives of amplification third end P3.
The switch module 202 can also control the first power end VGH and second source end when receiving cut-off signals
VGL and level transfer sub-circuit 10 turn off, and the first power end VGH inputs the first power supply without normal direction level transfer sub-circuit 10 at this time
Signal and second source end VGL are without the normal direction level transfer input second source signal of sub-circuit 10, correspondingly, the level turns
Quiescent current will not both be generated by moving sub-circuit 10.The quiescent current of the level shifter of the display device is smaller.
Fig. 4 is the structural schematic diagram of another level shifter provided in an embodiment of the present invention, as shown in figure 4, the inspection
Module 201 is surveyed, may include: and door &.
It can be connect with driving signal end Vin with the first input end of door &, the second input terminal with door & can be with reference
Power end Vref connection can be connect with the output end of door & with third end P3.
In embodiments of the present invention, the signal and reference power source end Vref that driving signal end Vin can should be provided with door &
The reference power source signal of offer carries out and operation.According to the logical operation relationship with door & it is found that when driving signal end Vin is provided
Signal it is identical with reference power source signal when, with door can to third end P3 input be in the first current potential signal, this first electricity
The signal of position is the open signal inputted to switch module 202.When the driving signal end Vin signal provided and reference power source letter
When number not identical, the signal for being in the second current potential can be inputted to third end P3 with door, the signal of second current potential is to opening
Close the cut-off signals that module 202 inputs.Wherein, which is effective current potential, which is invalid current potential.
Optionally, which also may include NAND gate or other are able to detect two paths of signals (i.e. with reference to electricity
The signal that source signal and driving signal end Vin are provided) whether identical logic gate, type of the embodiment of the present invention to the logic gate
Without limitation.
Optionally, Fig. 5 is the structural schematic diagram of another level shifter provided in an embodiment of the present invention, such as Fig. 5 institute
Show, the detection module 201, can also include: first resistor R1, second resistance R2 and capacitor C.
Wherein, one end of first resistor R1 can be connect with reference power source end Vref, and the other end of first resistor R1 can
To be connect with the first input end of door &.
One end of second resistance R2 can be connect with the first input end of door &, the other end of second resistance R2 can with connect
Ground terminal GND connection.
One end of capacitor C can be connect with reference power source end Vref, and the other end of capacitor C can be with ground terminal GND
Connection.
Wherein, first resistor R1 can be used as current-limiting resistance, and second resistance R2 can be used as pull down resistor, can use
To improve the stability of the work of detection module 201, and the safety of raising and door & work.Capacitor C can be used to carry out
Filtering inhibits influence of other signals to reference power source signal, improves the performance that detection module 201 works.
Optionally, Fig. 6 is the structural schematic diagram of another level shifter provided in an embodiment of the present invention, such as Fig. 6 institute
Show, which can also include: follower F.
One end of follower F can be connect with third end P3, and the other end of follower F can be with switch module 202
Connection.
In embodiments of the present invention, follower F can be voltage follower, and follower F can be used as detection module
Buffer stage between 201 and switch module 202 improves the stability for being input to the signal of switch module 202.
Optionally, with reference to fig. 4 to fig. 6, the switch module 202, may include: the first transistor M1, second transistor M2,
3rd resistor R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6.
The grid of the first transistor M1 can be connect with third end P3, and the first of the first transistor M1 extremely can be with
One power end VGH connection, the second of the first transistor M1 can extremely connect with first end P1.
The grid of second transistor M2 can be connect with third end P3, and the first of second transistor M2 extremely can be with
Two power end VGL connections, the second of second transistor M2 can extremely connect with second end P2.
One end of 3rd resistor R3 can be connect with the first power end VGH, and the other end of 3rd resistor R3 can be with
The P3 connection of third end.
One end of 4th resistance R4 can be connect with first end P1, and the other end of the 4th resistance R4 can be with ground terminal
GND connection.
One end of 5th resistance R5 can be connect with second source end VGL, and the other end of the 5th resistance R5 can be with
The P3 connection of third end.
One end of 6th resistance R6 can be connect with second end P2, and the other end of the 6th resistance R6 can be with ground terminal
GND connection.
Wherein, 3rd resistor R3 and the 5th resistance R5 can be used as load resistance, the 4th resistance R4 and the 6th resistance
R6 can be used as pull down resistor, and the job stability of level shifter can be improved and can occur in order to subsequent conditioning circuit
When failure, the failure cause of detection circuit.
Optionally, with reference to Fig. 5 and Fig. 6, which can also include: the 7th resistance R7 and the 8th resistance R8.
One end of 7th resistance R7 can be connect with third end P3, and the other end of the 7th resistance R7 can be with the first crystalline substance
The grid of body pipe M1 connects.
One end of 8th resistance R8 can be connect with third end P3, and the other end of the 8th resistance R8 can be with the second crystalline substance
The grid of body pipe M2 connects.
Wherein, the 7th resistance R7 and the 8th resistance R8 can be used as current-limiting resistance.
It should be noted that being with the first transistor M1 and second transistor M2 using p-type in the above embodiments
Transistor, and the first current potential is illustrated for low potential relative to the second current potential.Certainly, the first transistor M1 and second is brilliant
Body pipe M2 can also use N-type transistor, should when the first transistor M1 and second transistor M2 is all made of N-type transistor
First current potential is high potential relative to the second current potential.
In conclusion level shifter provided in an embodiment of the present invention, which includes level transfer sub-circuit and opens
Control sub-circuit is closed, which can shift with driving signal end, the first power end, second source end and level
Sub-circuit connection.The switch control sub-circuit can control the first power end when the driving signal end is inputted without driving signal
With second source end and level transfer sub-circuit shutdown, it that is to say the first power end without normal direction level transfer sub-circuit input first
Power supply signal, second source end input second source signal without normal direction level transfer sub-circuit.So that believing in driving
Number end without driving signal input when, level transfer sub-circuit in will not generate quiescent current, relative in the related technology, no matter drive
Whether dynamic signal end has driving signal input, the first power end and second source the end input power into level transfer sub-circuit
Signal, level transfer sub-circuit generate quiescent current, and the quiescent current that display device provided by the invention generates reduces, accordingly
, the discharge time at first power end and second source end extends relative to the relevant technologies, and residual charge can be in the extension
It is released effectively in time afterwards, improves the band phenomenon that the display screen of display device occurs due to residual charge.Display dress
The display effect set is preferable.
Fig. 7 is a kind of flow chart of the driving method of level shifter provided in an embodiment of the present invention, as shown in fig. 7,
This method can be applied to it is as any to Fig. 6 such as Fig. 1, Fig. 3 shown in level shifter, with reference to Fig. 1, level transfer electricity
Road may include: level transfer sub-circuit 10 and switch control sub-circuit 20.With reference to Fig. 7, this method may include:
Whether step 701, switch control sub-circuit detection driving signal end have driving signal input.
Wherein, switch control sub-circuit can be by detecting whether driving signal end has driving signal input, to determine this
Whether the I/O channel of level shifter is used.And when switch control sub-circuit detects that there is drive at driving signal end
When dynamic signal input, following step 702 can be executed；When switch control sub-circuit detects that driving signal end is defeated without driving signal
It is fashionable, following step 703 can be executed.
Step 702, the first power end of control are connected with the first end of level transfer sub-circuit, control second source end and electricity
Flat turn moves the second end conducting of sub-circuit, and inputs the driving signal, level transfer to the third end of level transfer sub-circuit
Circuit is under the control of the first power supply signal that the first power end provides and the second source signal that second source end provides, amplification
Driving signal, and by amplified driving signal input to output end.
Step 703, the first power end of control and second source end and level transfer sub-circuit shutdown.
By controlling the first power end and second source end and electricity when detecting driving signal end without driving signal input
Flat turn moves sub-circuit shutdown, can make when level shifter is not used by, and the first power end of control turns without normal direction level
It moves sub-circuit and inputs the first power supply signal, and control second source end without normal direction level transfer sub-circuit input second source letter
Number, correspondingly, level transfer sub-circuit will not generate quiescent current.Correspondingly, the first power end and second can be extended
The discharge time of power end so that residual charge is released effectively within the discharge time after the extension, and then can be effectively improved
Band phenomenon.
In conclusion the driving method of level shifter provided in an embodiment of the present invention, switch control sub-circuit can be with
When detecting driving signal end without driving signal input, controls the first power end and second source end and level shifts sub-circuit
Shutdown that is to say that the first power end inputs the first power supply signal without normal direction level transfer sub-circuit, and second source end is without normal direction electricity
Flat turn moves sub-circuit and inputs second source signal.So that level turns when driving signal end is inputted without driving signal
Quiescent current will not be generated by moving in sub-circuit, and relative in the related technology, no matter whether driving signal end has driving signal input,
First power end and second source end input power signal, display device production provided by the invention into level transfer sub-circuit
Raw quiescent current reduces, correspondingly, the discharge time at first power end and second source end extends relative to the relevant technologies,
Residual charge can be released effectively within the time after the extension, improve the display screen of display device since residual charge occurs
Band phenomenon.The display effect of the display device is preferable.
With reference to Fig. 3 it is found that the ON-OFF control circuit 20, may include detection module 201 and switch module 202, the detection
Module 201, may include: with door &, switch module 202 may include: the first transistor M1, second transistor M2,3rd resistor
R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6.
Correspondingly, in embodiments of the present invention, in detection module 20 can be by driving signal and with reference to electricity with door &
Source signal carries out and operation, to determine whether driving signal end has driving signal input.
When the reference power source signal that the signal that driving signal end Vin is provided and reference power source end Vref are provided is identical, with
Door & is after carrying out with operation, the driving signal that can be provided to third end P3 output drive signal end Vin, and can be to the
Three end P3 output is in the open signal of the first current potential, and the first transistor M1 and second transistor M2 can be under the open signals
It opens.At this point, the first transistor M1 can control the first end P1 conducting of the first power end VGH and level transfer sub-circuit 10,
Second transistor M2 can control the second end P2 conducting of second source end VGL and level transfer sub-circuit 10.Level transfer
Circuit 10 can be believed according to the second source that the first power end VGH the first power supply signal provided and second source end VGL are provided
Number, by input to output end OUT after the driving signal amplification of third end P3 input.When the driving letter that driving signal end Vin is provided
Number and the reference power source signal that provides of reference power source end Vref it is not identical when, can be to third with door & after carrying out with operation
P3 output is held to be in the cut-off signals of the second current potential, the first transistor M1 and second transistor M2 can be in the cut-off signals ShiShimonoseki
Disconnected, the first transistor M1 can control the first power end VGH and the first end P1 of level transfer sub-circuit 10 is disconnected, the second crystal
Pipe M2 can control second source end VGL and the second end P2 of level transfer sub-circuit 10 is disconnected, and the first power end VGH is without normal direction
Level shifts sub-circuit 10 and inputs the first power supply signal, and second source end VGL is without normal direction level transfer sub-circuit 10 input second
Power supply signal, correspondingly, level transfer sub-circuit 10 will not generate quiescent current.
It should be noted that being with the first transistor M1 and second transistor M2 using p-type in the above embodiments
Transistor, and the first current potential is illustrated for low potential relative to the second current potential.Certainly, the first transistor M1 and second is brilliant
Body pipe M2 can also use N-type transistor, should when the first transistor M1 and second transistor M2 is all made of N-type transistor
First current potential is high potential relative to the second current potential.
In conclusion the driving method of level shifter provided in an embodiment of the present invention, switch control sub-circuit can be with
When detecting driving signal end without driving signal input, controls the first power end and second source end and level shifts sub-circuit
Shutdown that is to say that the first power end inputs the first power supply signal without normal direction level transfer sub-circuit, and second source end is without normal direction electricity
Flat turn moves sub-circuit and inputs second source signal.So that level turns when driving signal end is inputted without driving signal
Quiescent current will not be generated by moving in sub-circuit, and relative in the related technology, no matter whether driving signal end has driving signal input,
First power end and second source end input power signal, display device production provided by the invention into level transfer sub-circuit
Raw quiescent current reduces, correspondingly, the discharge time at first power end and second source end extends relative to the relevant technologies,
Residual charge can be released effectively within the time after the extension, improve the display screen of display device since residual charge occurs
Band phenomenon.The display effect of the display device is preferable.
Fig. 8 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention, as shown in figure 8, the display device
AA may include: at least one it is as any to Fig. 6 such as Fig. 1, Fig. 3 shown in level shifter 01, gate driving circuit 02 and
Pixel unit (is not shown) in Fig. 8.
In embodiments of the present invention, each driving signal end IN of the gate driving circuit 02 can turn with a level
The output end OUT connection of shift circuit, the output end of the gate driving circuit 02 can be connect with pixel unit (not to be shown in Fig. 8
Out).The first end of the level shifter 01 can be connect with the first power end VGH, and second end can be with second source end VGL
Connection, the third end of the level shifter 01 can be connect with reference power source end Vref and driving signal end Vin.
The level shifter 01 can be according to the first power end VGH the first power supply signal provided and second source end
The second source signal that VGL is provided amplifies driving signal end Vin, that is to say that level shifter 01 is input to gate driving electricity
The driving signal of the driving signal end IN on road 02, for the amplified signal of driving signal for providing driving signal end Vin, so as to
Gate driving circuit 02 can work under the amplified driving signal.For example, the gate driving circuit 02 can be put at this
Driving pixel unit shines under driving signal after big.
It should be noted that in order to enable level shifter 01 is adapted to the gate driving circuit 02 of various structures, it should
The number of level shifter 01 in display device AA can be greater than the number of the driving signal end IN of gate driving circuit 02.
For example, the number of driving signal end IN is 4 as shown in figure 8, the number of level shifter 01 is 5.It is real through the invention
The level shifter 01 of example offer is provided, the first power end can be controlled in some level shifter 01 when being not used by
VGH and second source end VGL not to 01 input power signal of level shifter, correspondingly, the level shifter not by
In use, the level shifter will not generate quiescent current.Correspondingly, the quiescent current of level shifter can subtract
Small, the discharge time at first power end and second source end extends relative to the relevant technologies, and residual charge is after the extension
It can be released effectively in time, improve the band phenomenon that the display screen of display device occurs due to residual charge.
In addition, the display device can be with are as follows: liquid crystal display panel, Electronic Paper, oled panel, AMOLED panel, mobile phone, plate electricity
Any products or components having a display function such as brain, television set, display, laptop, Digital Frame, navigator.
It is apparent to those skilled in the art that for convenience and simplicity of description, the level of foregoing description
The specific work process of transfer circuit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of level shifter characterized by comprising level shifts sub-circuit and switch control sub-circuit；
The switch control sub-circuit shifts son with driving signal end, the first power end, second source end and the level respectively
Circuit connection, the switch control sub-circuit are used for when there is driving signal input at the driving signal end, control described first
Power end is connected with the first end of level transfer sub-circuit, controls the second source end and the level shifts sub-circuit
Second end conducting, and input the driving signal, the switch control electricity to the third end of level transfer sub-circuit
Road is also used to when the driving signal end is without driving signal input, control first power end and the second source end with
The level transfer sub-circuit shutdown；
Level transfer sub-circuit also connect with the output end, the level transfer sub-circuit be used for it is described first electric
When source and the second source end are connected, amplify the driving signal, and amplified driving signal is input to described defeated
Outlet.
2. circuit according to claim 1, which is characterized in that the switch control sub-circuit, comprising: detection module and open
Close module；
The detection module is connect with the driving signal end, reference power source end and the third end respectively, the detection module
It is whether identical for detecting the reference power source signal that signal that the driving signal end provides and the reference power source end provide, when
When the signal that the driving signal end provides is identical as the reference power source signal, the detection module determines the driving signal
There is driving signal input at end, inputs the driving signal to the third end, and input open signal, institute to the switch module
It states detection module to be also used to when the signal of driving signal end offer and the not identical reference power source signal, described in determination
Driving signal end is inputted without driving signal, and inputs cut-off signals to the switch module, wherein the reference power source signal is
The input signal that sequence controller is provided to the level shifter；
The switch module respectively with first power end, the second source end, the first end, the second end and institute
State the connection of third end, the switch module is used for when receiving the open signal, control first power end with it is described
First end conducting, controls the second source end and is connected with the second end, and the switch module is also used to described in receive
When cut-off signals, first power end and the second source end and level transfer sub-circuit shutdown are controlled.
3. circuit according to claim 2, which is characterized in that the detection module, comprising: with door；
It is described to be connect with the first input end of door with the driving signal end, second input terminal and the reference electricity with door
Source connection, it is described to be connect with the output end of door with the third end.
4. circuit according to claim 3, which is characterized in that the detection module, further includes: first resistor, the second electricity
Resistance and capacitor；
One end of the first resistor is connect with the reference power source end, the other end of the first resistor and the with door
The connection of one input terminal；
One end of the second resistance is connect with described with the first input end of door, the other end and ground terminal of the second resistance
Connection；
One end of the capacitor is connect with the reference power source end, and the other end of the capacitor is connect with the ground terminal.
5. circuit according to claim 3, which is characterized in that the detection module, further includes: follower；
One end of the follower is connect with the third end, and the other end of the follower is connect with the switch module.
6. circuit according to claim 2, which is characterized in that the switch module, comprising: the first transistor, the second crystalline substance
Body pipe, 3rd resistor, the 4th resistance, the 5th resistance and the 6th resistance；
The grid of the first transistor is connect with the third end, the first pole of the first transistor and first power supply
End connection, the second pole of the first transistor is connect with the first end；
The grid of the second transistor is connect with the third end, the first pole of the second transistor and the second source
End connection, the second pole of the second transistor is connect with the second end；
One end of the 3rd resistor is connect with first power end, and the other end of the 3rd resistor and the third end connect
It connects；
One end of 4th resistance is connect with the first end, and the other end of the 4th resistance is connect with the ground terminal；
One end of 5th resistance is connect with the second source end, and the other end of the 5th resistance and the third end connect
It connects；
One end of 6th resistance is connect with the second end, and the other end of the 6th resistance is connect with the ground terminal.
7. circuit according to claim 6, which is characterized in that the switch module, further includes: the 7th resistance and the 8th electricity
Resistance；
One end of 7th resistance is connect with the third end, the other end and the first transistor of the 7th resistance
Grid connection；
One end of 8th resistance is connect with the third end, the other end and the second transistor of the 8th resistance
Grid connection.
8. a kind of driving method of level shifter, which is characterized in that the method is applied to as claim 1 to 7 is any
In the level shifter, the level shifter, comprising: level shifts sub-circuit and switch control sub-circuit；Institute
The method of stating includes:
Whether switch control sub-circuit detection driving signal end has driving signal input；
When the switch control sub-circuit detects that there is driving signal input at the driving signal end, control the first power end with
The first end conducting of the level transfer sub-circuit, control second source end and the second end of level transfer sub-circuit are led
Logical, and input the driving signal to the third end of level transfer sub-circuit, the level transfer sub-circuit is described the
Under the control for the second source signal that the first power supply signal and the second source end that one power end provides provide, described in amplification
Driving signal, and by amplified driving signal input to output end；
When the switch control sub-circuit detects the driving signal end without driving signal input, first power supply is controlled
End and the second source end and level transfer sub-circuit shutdown.
9. a kind of display device, which is characterized in that the display device includes: at least one as described in claim 1 to 7 is any
Level shifter, gate driving circuit and pixel unit；
Each driving signal end of the gate driving circuit is connect with the output end of a level shifter, the grid
The output end of pole driving circuit is connect with the pixel unit.
10. display device according to claim 9, which is characterized in that level shifter in the display device
Number is greater than the number at the driving signal end being arranged in the gate driving circuit.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932542A (en) * | 2019-11-15 | 2020-03-27 | 锐捷网络股份有限公司 | MOS tube power supply circuit, control method, electronic device and storage medium |
| CN111354321A (en) * | 2020-03-19 | 2020-06-30 | 福州京东方光电科技有限公司 | Level processing circuit, gate drive circuit and display device |
| CN113949262A (en) * | 2021-11-18 | 2022-01-18 | 京东方科技集团股份有限公司 | Power supply circuit and display device |
| WO2022227168A1 (en) * | 2021-04-29 | 2022-11-03 | 惠州华星光电显示有限公司 | Driving circuit, data driving method, and display panel |
Citations (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI221059B (en) * | 2003-10-21 | 2004-09-11 | Novatek Microelectronics Corp | Voltage level shifter |
| KR20050076243A (en) * | 2004-01-20 | 2005-07-26 | 엘지전자 주식회사 | Level shift circuit of smart power ic |
| CN1744440A (en) * | 2004-08-05 | 2006-03-08 | 索尼株式会社 | Level conversion circuit, power supply voltage generation circuit, shift circuit, shift register circuit, and display apparatus |
| CN1770621A (en) * | 2004-11-05 | 2006-05-10 | 三星电子株式会社 | Differential amplifier circuit capable of reducing current consumption |
| US20060238232A1 (en) * | 2005-04-07 | 2006-10-26 | Jerome Bourgoin | Voltage level shifting device |
| CN101131487A (en) * | 2006-08-25 | 2008-02-27 | 群康科技(深圳)有限公司 | Power supply circuit and LCD using the same |
| CN101552841A (en) * | 2008-03-31 | 2009-10-07 | 恩益禧电子股份有限公司 | Output amplifier circuit and data driver of display device using the same |
| US20100073084A1 (en) * | 2008-09-19 | 2010-03-25 | Samsung Electro-Mechanics Company, Ltd. | Systems and methods for a level-shifting high-efficiency linc amplifier using dynamic power supply |
| CN101800516A (en) * | 2009-02-05 | 2010-08-11 | 联咏科技股份有限公司 | Output buffer and source driver applying same |
| KR20100104124A (en) * | 2009-03-16 | 2010-09-29 | 삼성전자주식회사 | Logic circuit capable of level shifting |
| CN101996596A (en) * | 2009-08-10 | 2011-03-30 | 瑞萨电子株式会社 | LCD driving circuit using operational amplifier and LCD display apparatus using the same |
| US20110234570A1 (en) * | 2010-03-24 | 2011-09-29 | Renesas Electronics Corporation | Level shift circuit, data driver, and display device |
| CN102446480A (en) * | 2010-10-14 | 2012-05-09 | 上海天马微电子有限公司 | Voltage conversion circuit |
| CN103325353A (en) * | 2012-03-23 | 2013-09-25 | 乐金显示有限公司 | Level shifter for liquid crystal display |
| US20130328854A1 (en) * | 2012-06-06 | 2013-12-12 | Texas Instruments Incorporated | Output short circuit protection for display bias |
| CN103474015A (en) * | 2013-08-20 | 2013-12-25 | 北京大学深圳研究生院 | Output amplifier, digital-to-analogue converter, data drive circuit and display device |
| US20140049532A1 (en) * | 2012-08-17 | 2014-02-20 | Samsung Display Co., Ltd. | Display device able to prevent an abnormal display caused by a soft fail and a method of driving the same |
| WO2014174472A1 (en) * | 2013-04-24 | 2014-10-30 | Ignis Innovation Inc. | Display system with compensation techniques and/or shared level resources |
| CN104200790A (en) * | 2014-09-18 | 2014-12-10 | 南京中电熊猫液晶显示科技有限公司 | Voltage switching circuit, liquid crystal panel drive circuit and liquid crystal display |
| CN104795040A (en) * | 2015-04-30 | 2015-07-22 | 京东方科技集团股份有限公司 | Array substrate, display device and shutdown ghost improving circuit for display device |
| CN205212814U (en) * | 2015-09-11 | 2016-05-04 | 英特格灵芯片(天津)有限公司 | Level conversion's device |
| CN105609073A (en) * | 2016-01-07 | 2016-05-25 | 京东方科技集团股份有限公司 | Drive circuit, drive method, and display apparatus |
| CN105632438A (en) * | 2016-01-08 | 2016-06-01 | 京东方科技集团股份有限公司 | Level offset unit, level offset circuit and drive method, and grid drive circuit |
| CN106847204A (en) * | 2016-12-27 | 2017-06-13 | 武汉华星光电技术有限公司 | Gate driving circuit and display device |
| CN106982033A (en) * | 2017-02-23 | 2017-07-25 | 锐迪科微电子（上海）有限公司 | A kind of power amplifier based on pressure build-up technique |
| CN107017875A (en) * | 2015-11-26 | 2017-08-04 | 拉碧斯半导体株式会社 | Level shift circuit and display driver |
| CN107424577A (en) * | 2017-08-15 | 2017-12-01 | 京东方科技集团股份有限公司 | A kind of display driver circuit, display device and its driving method |
| CN107483045A (en) * | 2017-07-20 | 2017-12-15 | 深圳市华星光电半导体显示技术有限公司 | A kind of level displacement circuit and display device |
| CN107633828A (en) * | 2017-09-22 | 2018-01-26 | 深圳市华星光电技术有限公司 | Level shift circuit |
| CN107644609A (en) * | 2017-10-11 | 2018-01-30 | 京东方科技集团股份有限公司 | The circuit and driving method, gate driving circuit of GOA signal end signal amplitudes during lifting shutdown |
| CN107707245A (en) * | 2017-09-25 | 2018-02-16 | 京东方科技集团股份有限公司 | Level shifter, display device drive circuit and display device |
| CN207182881U (en) * | 2017-09-29 | 2018-04-03 | 京东方科技集团股份有限公司 | Pixel-driving circuit, array base palte and display device |
| CN108257570A (en) * | 2018-02-09 | 2018-07-06 | 京东方科技集团股份有限公司 | Eliminate control circuit, its control method and the liquid crystal display device of power-off ghost shadow |
-
2018
- 2018-08-01 CN CN201810862059.XA patent/CN108962119B/en active Active
Patent Citations (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI221059B (en) * | 2003-10-21 | 2004-09-11 | Novatek Microelectronics Corp | Voltage level shifter |
| KR20050076243A (en) * | 2004-01-20 | 2005-07-26 | 엘지전자 주식회사 | Level shift circuit of smart power ic |
| CN1744440A (en) * | 2004-08-05 | 2006-03-08 | 索尼株式会社 | Level conversion circuit, power supply voltage generation circuit, shift circuit, shift register circuit, and display apparatus |
| CN1770621A (en) * | 2004-11-05 | 2006-05-10 | 三星电子株式会社 | Differential amplifier circuit capable of reducing current consumption |
| US20060238232A1 (en) * | 2005-04-07 | 2006-10-26 | Jerome Bourgoin | Voltage level shifting device |
| CN101131487A (en) * | 2006-08-25 | 2008-02-27 | 群康科技(深圳)有限公司 | Power supply circuit and LCD using the same |
| CN101552841A (en) * | 2008-03-31 | 2009-10-07 | 恩益禧电子股份有限公司 | Output amplifier circuit and data driver of display device using the same |
| US20100073084A1 (en) * | 2008-09-19 | 2010-03-25 | Samsung Electro-Mechanics Company, Ltd. | Systems and methods for a level-shifting high-efficiency linc amplifier using dynamic power supply |
| CN101800516A (en) * | 2009-02-05 | 2010-08-11 | 联咏科技股份有限公司 | Output buffer and source driver applying same |
| KR20100104124A (en) * | 2009-03-16 | 2010-09-29 | 삼성전자주식회사 | Logic circuit capable of level shifting |
| CN101996596A (en) * | 2009-08-10 | 2011-03-30 | 瑞萨电子株式会社 | LCD driving circuit using operational amplifier and LCD display apparatus using the same |
| US20110234570A1 (en) * | 2010-03-24 | 2011-09-29 | Renesas Electronics Corporation | Level shift circuit, data driver, and display device |
| CN102446480A (en) * | 2010-10-14 | 2012-05-09 | 上海天马微电子有限公司 | Voltage conversion circuit |
| CN103325353A (en) * | 2012-03-23 | 2013-09-25 | 乐金显示有限公司 | Level shifter for liquid crystal display |
| US20130328854A1 (en) * | 2012-06-06 | 2013-12-12 | Texas Instruments Incorporated | Output short circuit protection for display bias |
| US20140049532A1 (en) * | 2012-08-17 | 2014-02-20 | Samsung Display Co., Ltd. | Display device able to prevent an abnormal display caused by a soft fail and a method of driving the same |
| WO2014174472A1 (en) * | 2013-04-24 | 2014-10-30 | Ignis Innovation Inc. | Display system with compensation techniques and/or shared level resources |
| CN103474015A (en) * | 2013-08-20 | 2013-12-25 | 北京大学深圳研究生院 | Output amplifier, digital-to-analogue converter, data drive circuit and display device |
| CN104200790A (en) * | 2014-09-18 | 2014-12-10 | 南京中电熊猫液晶显示科技有限公司 | Voltage switching circuit, liquid crystal panel drive circuit and liquid crystal display |
| CN104795040A (en) * | 2015-04-30 | 2015-07-22 | 京东方科技集团股份有限公司 | Array substrate, display device and shutdown ghost improving circuit for display device |
| CN205212814U (en) * | 2015-09-11 | 2016-05-04 | 英特格灵芯片(天津)有限公司 | Level conversion's device |
| CN107017875A (en) * | 2015-11-26 | 2017-08-04 | 拉碧斯半导体株式会社 | Level shift circuit and display driver |
| CN105609073A (en) * | 2016-01-07 | 2016-05-25 | 京东方科技集团股份有限公司 | Drive circuit, drive method, and display apparatus |
| WO2017118034A1 (en) * | 2016-01-08 | 2017-07-13 | 京东方科技集团股份有限公司 | Level shift unit, level shift circuit and driving method, gate driver circuit, and display device |
| CN105632438A (en) * | 2016-01-08 | 2016-06-01 | 京东方科技集团股份有限公司 | Level offset unit, level offset circuit and drive method, and grid drive circuit |
| CN106847204A (en) * | 2016-12-27 | 2017-06-13 | 武汉华星光电技术有限公司 | Gate driving circuit and display device |
| CN106982033A (en) * | 2017-02-23 | 2017-07-25 | 锐迪科微电子（上海）有限公司 | A kind of power amplifier based on pressure build-up technique |
| CN107483045A (en) * | 2017-07-20 | 2017-12-15 | 深圳市华星光电半导体显示技术有限公司 | A kind of level displacement circuit and display device |
| CN107424577A (en) * | 2017-08-15 | 2017-12-01 | 京东方科技集团股份有限公司 | A kind of display driver circuit, display device and its driving method |
| CN107633828A (en) * | 2017-09-22 | 2018-01-26 | 深圳市华星光电技术有限公司 | Level shift circuit |
| CN107707245A (en) * | 2017-09-25 | 2018-02-16 | 京东方科技集团股份有限公司 | Level shifter, display device drive circuit and display device |
| CN207182881U (en) * | 2017-09-29 | 2018-04-03 | 京东方科技集团股份有限公司 | Pixel-driving circuit, array base palte and display device |
| CN107644609A (en) * | 2017-10-11 | 2018-01-30 | 京东方科技集团股份有限公司 | The circuit and driving method, gate driving circuit of GOA signal end signal amplitudes during lifting shutdown |
| CN108257570A (en) * | 2018-02-09 | 2018-07-06 | 京东方科技集团股份有限公司 | Eliminate control circuit, its control method and the liquid crystal display device of power-off ghost shadow |
Non-Patent Citations (4)
| Title |
|---|
| SANG YEON KIM: "A Low-Power Single-Input Level Shifter for Oxide Thin-Film Transistors", 《JOURNAL OF 》 * |
| 张为: "一种新型的BCD工艺栅驱动集成电路", 《北京理工大学学报》 * |
| 钟曙: "基于有源钳位的高效单级开关功率放大器", 《中国电机工程学报》 * |
| 马松: "一种极低功耗CMOS运算放大器设计", 《南开大学学报(自然科学版)》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932542A (en) * | 2019-11-15 | 2020-03-27 | 锐捷网络股份有限公司 | MOS tube power supply circuit, control method, electronic device and storage medium |
| CN111354321A (en) * | 2020-03-19 | 2020-06-30 | 福州京东方光电科技有限公司 | Level processing circuit, gate drive circuit and display device |
| CN111354321B (en) * | 2020-03-19 | 2022-03-25 | 福州京东方光电科技有限公司 | Level processing circuit, gate drive circuit and display device |
| WO2022227168A1 (en) * | 2021-04-29 | 2022-11-03 | 惠州华星光电显示有限公司 | Driving circuit, data driving method, and display panel |
| CN113949262A (en) * | 2021-11-18 | 2022-01-18 | 京东方科技集团股份有限公司 | Power supply circuit and display device |
| CN113949262B (en) * | 2021-11-18 | 2023-08-08 | 京东方科技集团股份有限公司 | Power supply circuit and display device |
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