CN110021258A - A kind of signal conversion circuit and method and driving circuit and display device - Google Patents
A kind of signal conversion circuit and method and driving circuit and display device Download PDFInfo
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- CN110021258A CN110021258A CN201910326991.5A CN201910326991A CN110021258A CN 110021258 A CN110021258 A CN 110021258A CN 201910326991 A CN201910326991 A CN 201910326991A CN 110021258 A CN110021258 A CN 110021258A
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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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/027—Arrangements or methods related to powering off a display
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the invention discloses a kind of signal conversion circuit and method and driving circuit and display devices.Signal conversion circuit includes selection sub-circuit and amplification sub-circuit；The input terminal of selection sub-circuit is connected to the drive signal line of display panel, the drive signal line that second output terminal is connected to display surface by amplifying sub-circuit for accessing driving signal, the first output end；Sub-circuit is selected, is used for when showing equipment shutdown, from second output terminal output drive signal；Amplify sub-circuit and amplified drive amplification signal is output to display panel for amplifying processing to the driving signal that second output terminal exports.The embodiment of the present invention solves existing display equipment during shutdown, since all TFT being difficult to ensure in unlatching display panel are to discharge charge, and leads to the bad phenomenon of ghost occur when shutdown.
Description
Technical field
This application involves but be not limited to display technology and field of circuit technology, espespecially a kind of signal conversion circuit and method,
And driving circuit and display device.
Background technique
When showing equipment shutdown, usually requires that and open all thin film transistor (TFT) (Thin Film in display panel
Transistor, referred to as are as follows: TFT) to discharge charge, to avoid showing the phenomenon that there are ghosts when equipment is shut down.
Show equipment during power supply closes (Power off), it may appear that be originally used for opening the clock signal of TFT
Voltage value (Vclk) be difficult to be pulled high to the voltage value that can sufficiently open TFT, lead to gate driving circuit (Gate Driver
On Array, referred to as are as follows: GOA) can not the TFT in fully open display panel discharge charge, to occur ghost during shutdown
Bad phenomenon.
Summary of the invention
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of signal conversion circuit and methods, and drive
Dynamic circuit and display device, the circuit structure of ordered pair signal conversion circuit (L/S) carries out reasonable when in conjunction with the shutdown for showing equipment
Improvement, solve existing display equipment during shutdown, due to be difficult to ensure open display panel in all TFT with
Charge is discharged, and leads to the bad phenomenon of ghost occur when shutdown.
The embodiment of the present invention provides a kind of signal conversion circuit, comprising: selection sub-circuit and amplification sub-circuit；
For the input terminal of the selection sub-circuit for accessing driving signal, the first output end is connected to the driving of display panel
Signal wire, second output terminal are connected to the drive signal line of the display panel by the amplification sub-circuit；
The selection sub-circuit is used for when showing equipment shutdown, from the second output terminal output drive signal；
The amplification sub-circuit, the driving signal for exporting to the second output terminal amplify processing, will amplify
Drive amplification signal afterwards is output to the display panel.
Optionally, in signal conversion circuit as described above,
The selection sub-circuit is also used to export institute from first output end when the display equipment is worked normally
State driving signal.
Optionally, in signal conversion circuit as described above, the amplification sub-circuit includes: operational amplifier, the first electricity
Resistance and second resistance；
The first input end of the operational amplifier connects the second output terminal of the selection sub-circuit, and the second input terminal is logical
The first resistor ground connection is crossed, and connects second electricity between the first resistor and the output end of the operational amplifier
Resistance.
Optionally, in signal conversion circuit as described above, pass through the institute exported after the amplification sub-circuit enhanced processing
State the voltage value of drive amplification signal are as follows:
Wherein, the VGOA2For the voltage value of the drive amplification signal of operational amplifier output, the R1It is described
The resistance value of one resistance, the R2For the resistance value of the second resistance, the VGOA1For the drive of the operational amplifier of input
The voltage value of dynamic signal.
Optionally, in signal conversion circuit as described above, the selection sub-circuit includes: access driving signal in parallel
First access and alternate path, first access are connected to first output end, and the alternate path is connected to described
Two output ends；
The selection sub-circuit is also used to that first access and disconnection is connected when the display equipment works normally
The alternate path disconnects first access and the alternate path is connected in display equipment shutdown.
Optionally, in signal conversion circuit as described above, further includes: output end is connected to detecing for the selection sub-circuit
Survey sub-circuit；
The detecting sub-circuit is also used to detecting for exporting high level when detecting display equipment shutdown
Low level is exported when the display equipment works normally out；
The selection sub-circuit, be also used to the detecting sub-circuit export high level when, be connected the alternate path with
The driving signal is exported from the second output terminal, is also used to when the detecting sub-circuit exports low level, described in conducting
First access is to export the driving signal from first output end.
Optionally, in signal conversion circuit as described above, the input terminal of the detecting sub-circuit is for accessing logic letter
Number；
The detecting sub-circuit is also used to be less than threshold voltage in the voltage value for the logical signal for detecting input
When, high level is exported, is also used to be greater than or equal to the threshold voltage in the voltage value for the logical signal for detecting input
When, export low level.
Optionally, in signal conversion circuit as described above, the detecting sub-circuit includes: that input terminal is connected to described patrol
The detecting voltage unit of signal is collected, the output end of the detecting voltage unit is connected to detecting by current trigger unit
The output end of circuit, the output end are grounded by 3rd resistor；
The current trigger unit, the voltage of the logical signal for detecting input in the detecting voltage unit
When value is less than threshold voltage, the first electric current is exported, so that the voltage value of the handoff trigger signal of the detecting sub-circuit output are as follows:
Vp=I1*R3；
Wherein, the VpFor the voltage value of the handoff trigger signal of the detecting sub-circuit output, the I1It is described
The current value of first electric current, the R3For the resistance value of the 3rd resistor.
Optionally, in signal conversion circuit as described above, the driving of the input terminal of the selection sub-circuit is inputted
Signal includes one of: clock signal, de-noising signal and frame start signal.
The embodiment of the present invention also provides a kind of signal conversion method, using signal conversion circuit as described in any one of the above embodiments
Execute the signal conversion method, which comprises
The driving signal of shutdown is used to indicate to signal conversion circuit input；
Control the drive amplification letter after the signal conversion circuit exports enhanced processing to the drive signal line of display panel
Number.
Optionally, in signal conversion method as described above, further includes:
The driving signal for executing display is used to indicate to signal conversion circuit input；
It controls the signal conversion circuit and exports the driving signal to the drive signal line of the display panel.
The embodiment of the present invention also provides a kind of driving circuit, comprising: gate driving circuit and at least one such as above-mentioned
The output end of signal conversion circuit described in one, each signal conversion circuit is connected to the defeated of the gate driving circuit
Enter end；
The driving circuit, for when showing equipment shutdown, controlling the selection son electricity of each signal conversion circuit
Road is from second output terminal output drive signal, to transmit drive amplification signal to the gate driving circuit.
Optionally, in driving circuit as described above,
The driving circuit is also used to control each signal conversion circuit when the display equipment works normally
Selection sub-circuit from the first output end output drive signal, to transmit the driving signal to the gate driving circuit.
The embodiment of the present invention also provides a kind of display device, comprising: display panel and drive as described in any one of the above embodiments
Circuit is moved, the gate driving circuit in the driving circuit is connected with the display panel.
Optionally, in display device as described above, further includes: sequence controller, the sequence controller include multiple
For the output end of output drive signal, the output end of the sequence controller is connected with the input terminal of the signal conversion circuit
It connects；
The sequence controller, for transmitting driving signal to the input terminal of each signal conversion circuit.
The embodiment of the present invention also provides a kind of computer readable storage medium, and the computer-readable recording medium storage has
Executable instruction, the executable instruction realize signal conversion method as described in any one of the above embodiments when being executed by processor.
Signal conversion circuit provided in an embodiment of the present invention and method and driving circuit and display device, wherein signal
Conversion circuit includes the selection sub-circuit of input terminal access driving signal and is connected with the second output terminal of the selection sub-circuit
Amplification sub-circuit, and the first output end of sub-circuit and the output end of amplification sub-circuit is selected to be all connected to the drive of display panel
Dynamic signal wire, based on the structure of above-mentioned signal conversion circuit, by selection sub-circuit, when showing equipment shutdown, selection passes through it
The driving signal is input to amplification sub-circuit and amplifies processing by second output terminal output drive signal, thus will amplification
Treated, and drive amplification signal is output to display panel；Ordered pair signal turns when the embodiment of the present invention combines the shutdown of display equipment
The circuit structure for changing circuit is reasonably improved, i.e., selection sub-circuit and amplification sub-circuit are added in available circuit, will close
The driving signal that voltage value is pulled low during machine can reach after amplifying the enhanced processing of sub-circuit to display panel output
To TFT cut-in voltage VghDrive amplification signal, it can be ensured that display equipment shutdown when have time enough and voltage that can beat
The TFT in display panel is opened, residual charge is discharged, to avoid the bad phenomenon of ghost occur when shutdown.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is a kind of structural schematic diagram of level shifting circuit in existing display equipment；
Fig. 2 is a kind of schematic diagram of sequential relationship of level shifting circuit shown in Fig. 1；
Fig. 3 is a kind of structural schematic diagram of signal conversion circuit provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another signal conversion circuit provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of another signal conversion circuit provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another signal conversion circuit provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another signal conversion circuit provided in an embodiment of the present invention；
A kind of schematic diagram of sequential relationship in the signal conversion circuit that Fig. 8 provides for embodiment illustrated in fig. 7；
Fig. 9 is a kind of flow chart of signal conversion method provided in an embodiment of the present invention；
Figure 10 is the flow chart of another signal conversion method provided in an embodiment of the present invention；
Figure 11 is a kind of structural schematic diagram of driving circuit provided in an embodiment of the present invention；
Figure 12 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention
Figure 13 is a kind of flow chart of the driving method of display device provided in an embodiment of the present invention；
Figure 14 is the flow chart of the driving method of another 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, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions
It executes.Also, although logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable
Sequence executes shown or described step.
Fig. 1 is a kind of structural schematic diagram of level shifting circuit in existing display equipment.As shown in Figure 1, display equipment is just
Often when display, the input terminal 50a of level conversion (Level Shifter, referred to as are as follows: the L/S) circuit 50 is set for receiving display
The clock signal Clk0 of standby GOA circuit output, and the Clk0 is amplified to after Clk1 by an amplifier 51 and is output to display
Corresponding grid line 61 in panel 60, to open corresponding scan line；Show equipment during shutdown, it may appear that the voltage value of Clk0
Vclk0The case where being dragged down rapidly, at this point, the voltage value V of Clk1clk1It is not pulled high to the voltage value that can sufficiently open TFT
(the i.e. cut-in voltage V of TFTgh), so as to cause GOA circuit can not TFT in fully open display panel to discharge charge, thus
Occurs the bad phenomenon of ghost during shutdown.
In view of the above-mentioned problems, provide a kind of mode by adjusting timing in the prior art to improve power off afterimage phenomenon,
Such as the adjustment of XAO (or referred to as XON) timing, as shown in Fig. 2, be a kind of sequential relationship of level shifting circuit shown in Fig. 1
Schematic diagram can make the TFT in display panel have the sufficient time to discharge by the adjustment of XAO timing, and XAO timing is L/S
The function of itself, in Fig. 2, VghFor the cut-in voltage of TFT, V_dis is the detection voltage in L/S, VoffFor the closing voltage of TFT,
When the detection voltage (V_dis) in L/S drops to some particular voltage level, all GOA signals will be pulled high at that time
VghVoltage.But this method is very stringent to the timing requirements of XAO, XAO drag down some Clk1 a little later voltage value Vclk1It will
Decline, is not enough to fully open TFT, and more discharge time can not also eliminate the residual charge in display panel again at this time.
The present invention provides following specific embodiment and can be combined with each other, for the same or similar concept or process
It may be repeated no more in some embodiments.
Fig. 3 is a kind of structural schematic diagram of signal conversion circuit provided in an embodiment of the present invention.Letter provided in this embodiment
Number conversion circuit 100 may include: selection sub-circuit 110 and amplification sub-circuit 120.
In the signal conversion circuit 100 of the embodiment of the present invention, select the input terminal 110a of sub-circuit 110 for accessing driving
Signal, the first output end 110b are connected to the drive signal line 21 of display panel 20, and second output terminal 110c passes through amplification son electricity
Road 120 is connected to the drive signal line 21 of display panel 20.
Based on the structure of signal conversion circuit 100 shown in Fig. 3, selection sub-circuit 110 in the embodiment of the present invention, for
When showing equipment shutdown, from second output terminal 110c output drive signal；
Amplify sub-circuit 120, the driving signal for exporting to second output terminal 110c amplifies processing, after amplification
Drive amplification signal be output to display panel.
It should be noted that the driving that the selection sub-circuit 110 of signal conversion circuit 100 receives in the embodiment of the present invention
Signal is the driving signal to be transmitted to GOA circuit in display panel, is input to the driving letter of the input terminal of selection sub-circuit 110
Number for example may include one of: clock signal (for example, Clk), de-noising signal (for example, dde or ddo) and frame rise
Beginning signal (for example, STV) etc..For Fig. 3 using driving signal as clock signal Clk1, drive amplification signal is clock amplified signal
It is shown for Clk2；In practical applications, the driving signal of input signal conversion circuit 100 can be to be other for inputting
GOA signal of GOA circuit, such as above-mentioned dde, ddo or STV signal etc..
The following embodiment of the present invention by taking the driving signal of input signal conversion circuit 100 is clock signal Clk1 as an example,
Illustrate the processing mode of signal conversion circuit 100 provided in an embodiment of the present invention.The signal conversion circuit 100 can be to be entered
The clock signal of GOA circuit carries out the processing of level conversion, so that the clock signal of input display panel can satisfy display surface
Timing requirements during normal display of plate, and shutdown etc..It should be noted that level shifting circuit shown in referring to Fig.1
50, input selects the clock signal Clk1 of sub-circuit 110 to have carried out enhanced processing in the embodiment of the present invention, and is showing
Panel can open TFT when normally showing, the voltage value of clock signal Clk1 can achieve the cut-in voltage V of TFTgh；Usually
, sequence controller (Timing Controller, referred to as are as follows: T-Con) is transferred directly to the initial of signal conversion circuit 100
The voltage value of clock signal Clk0 is smaller, and for example, 3.3 volts (V), after being amplified to initial clock signal Clk0
Reach the cut-in voltage V of TFT unlocking conditionghSize, Vgh(i.e. Vclk1) it is, for example, 20V~30V, to initial clock signal Clk0
Amplify circuit structure and similar in the prior art, the signal conversion circuit shown in Fig. 3 that clock signal Clk1 is exported after processing
The circuit structure before obtaining clock signal Clk1 is not shown in 100, voltage value is reached into TFT cut-in voltage VghClock letter
The input signal of number Clk1 alternatively sub-circuit 110.
There are two output end, the i.e. outputs of the first output end 110b and second for the tool of selection sub-circuit 110 of the embodiment of the present invention
Hold 110c, the two output ends selectively export, i.e., by the selection of selection sub-circuit 110 by the first output end 110b or
Second output terminal 110c exports the clock signal Clk1 received from input terminal 110a.In practical applications, sub-circuit 110 is selected
Selection is related to the display working condition of equipment by which output end output clock signal Clk1, when showing equipment shutdown,
The voltage value V of the initial clock signal Clk0 of T-Con circuit outputclk0It can reduce rapidly, i.e. the input from selection sub-circuit 110
Hold the voltage value V of the clock signal Clk1 of 110a inputclk1It can reduce rapidly, that is to say, that if directly believing the clock of input
Number Clk1 is exported to display panel, due to the influence of display equipment shutdown timing, the voltage value V of clock signal Clk1clk1It is difficult
To reach the cut-in voltage V for opening TFT in display panelgh, therefore, it is impossible to charge sufficiently is discharged to TFT in display panel,
To occur the bad phenomenon of ghost during shutdown, above situation be the prior art scheme and there are the problem of.
For above-mentioned the problems of the prior art, in signal conversion circuit 100 provided in an embodiment of the present invention, son electricity is selected
Road 110, which can choose, exports the clock signal that above-mentioned voltage value reduces by the first output end 110b or second output terminal 110c
Clk1, working method are as follows: when showing equipment shutdown, the selection of selection sub-circuit 110 is by its second output terminal 110c output
Clock signal Clk1, due to being connected with amplification sub-circuit between second output terminal 110c and the drive signal line 21 of display panel 20
120, therefore, clock signal Clk1 at this time is not used as the input signal of display panel 20, in signal conversion circuit 100
Portion first receives clock signal Clk1 with the second output terminal 110c amplification sub-circuit 120 being connected, and believes the clock
Number Clk1 amplifies processing, so that the voltage value V of amplified clock amplified signal Clk2clk2It can achieve aobvious for opening
Show the cut-in voltage V of TFT in panelgh.Although can be seen that display equipment shutdown, the input of input signal conversion circuit 100
The voltage value V of signal (i.e. clock signal Clk1)clk1It is lowered, by selecting the selectivity of sub-circuit 110 to export, so that output
Clock signal Clk1 can by amplification sub-circuit 120 its voltage value be drawn high, in this way, can satisfy input display panel
Clock amplified signal Clk2 can effectively open TFT, to discharge the residual charge in display panel, so as to improve even being eliminated
There is the bad phenomenon of ghost when the shutdown of existing display equipment.
Signal conversion circuit 100 provided in an embodiment of the present invention, selection including input terminal 110a access driving signal
Circuit 110 and the amplification sub-circuit 120 being connected with the second output terminal 110c of the selection sub-circuit 110, and select sub-circuit
110 the first output end 110b and the output end of amplification sub-circuit 120 are all connected to the drive signal line 21 of display panel 20, base
In the structure of above-mentioned signal conversion circuit 100, by selection sub-circuit 110, when showing equipment shutdown, selection is second defeated by it
The driving signal is input to amplification sub-circuit 120 and amplifies processing by outlet 110c output drive signal, thus will amplification
Treated, and drive amplification signal is output to display panel 20；Ordered pair signal when the embodiment of the present invention combines the shutdown of display equipment
The circuit structure of conversion circuit 100 is reasonably improved, i.e., selection sub-circuit 110 and amplification son electricity are added in available circuit
Road 120, the driving signal that voltage value in shutdown process is pulled low is after amplifying the enhanced processing of sub-circuit 120, to display
The output of panel 20 can achieve TFT cut-in voltage VghDrive amplification signal, it can be ensured that display equipment shutdown when have it is enough
Time and voltage can open the TFT in display panel 20, discharge residual charge, to avoid the bad of ghost occur when shutdown
Phenomenon.
It should be noted that selecting sub-circuit 110, also in above-mentioned signal conversion circuit 100 provided in an embodiment of the present invention
For show equipment work normally when, from the first output end 110b output drive signal.
It is equally explained so that driving signal is clock signal Clk1 as an example, selection son electricity is had been described above in above-described embodiment
Road 110 selection can pass through second output terminal 110c output clock signal Clk1 during showing equipment shutdown；It is showing
Under other states of equipment, for example, display equipment normally show during, the selection sub-circuit 110 be also an option that passes through it
First output end 110b exports clock signal Clk1, and clock signal Clk1 at this time is swept as in display panel for carrying out grid line
The driving signal retouched, voltage value Vclk1Size can satisfy open respective scanned row in TFT so that display panel is real
Now normal display function.
Optionally, Fig. 4 is the structural schematic diagram of another signal conversion circuit provided in an embodiment of the present invention.In Fig. 3 institute
In the structure basis for showing signal conversion circuit 100, in the signal conversion circuit 100 of the embodiment of the present invention, amplification sub-circuit 120 can
To include: operational amplifier 121, first resistor R1With second resistance R2。
The structure of signal conversion circuit 100 as shown in Figure 4, the first input end 121a connection selection of operational amplifier 121
The second output terminal 110c of sub-circuit 110, the second input terminal 121b is grounded by first resistor R1, and first resistor R1With
Second resistance R is connected between the output end 121c of operational amplifier 1212；Above-mentioned first input end 121a can be operation amplifier
The non-inverting input terminal of device 121, the second input terminal 121b can be the inverting input terminal of operational amplifier 121, second resistance R2It can
Think feedback resistance Rf。
The specific structure for amplifying sub-circuit 120 in signal conversion circuit 100 based on shown in Fig. 4, passes through the amplification sub-circuit
The voltage value of the drive amplification signal exported after 120 enhanced processings are as follows:
In above-mentioned formula (1), VGOA2For the voltage value for the drive amplification signal that operational amplifier 121 exports, R1For first resistor
Resistance value, R2For the resistance value of second resistance, VGOA1For the voltage value of the driving signal of the operational amplifier 121 of input, the VGOA1?
For the voltage value of the driving signal of input selection sub-circuit 110.
In embodiments of the present invention, it can be calculated by above-mentioned formula (1) and be put through the amplified driving of amplification sub-circuit 120
The voltage value V of big signalGOA2, such as can be calculated according to formula (1) by the amplification amplified clock of sub-circuit 120 amplification letter
The voltage value V of number Clk2clk2Are as follows:
Normally, according to TFT cut-in voltage V in display panelghSize and display equipment shutdown when driving signal voltage
Value VGOA1Size, can reverse-engineer amplification sub-circuit 120 in each device parameters.As shown in figure 4, in practical applications,
The positive power source terminal of operational amplifier 120 is connected to supply voltage Vcc, negative power end ground connection, in addition, in order to allow supply voltage Vcc?
Power down is slow when shutdown, and positive power source terminal passes through first capacitor C1Ground connection.
Optionally, Fig. 5 is the structural schematic diagram of another signal conversion circuit provided in an embodiment of the present invention.In Fig. 4 institute
In the structure basis for showing signal conversion circuit 100, in the signal conversion circuit 100 of the embodiment of the present invention, select sub-circuit 110 can
To include: the first access ch1 and alternate path ch2 of access driving signal in parallel, wherein the first access ch1 is connected to first
Output end 110b, alternate path ch2 are connected to second output terminal 110c.
In the signal conversion circuit 100 of the embodiment of the present invention, sub-circuit 110 is selected, is also used in the display normal work of equipment
When making, the first access ch1 is connected and disconnects alternate path ch2, when showing equipment shutdown, disconnects the first access ch1 and be connected
Alternate path ch2.
In above-described embodiment it is stated that when display equipment works normally, select the selection of sub-circuit 110 first defeated by it
Outlet 110b output drive signal (for example, clock signal Clk1), display equipment during shutdown, select the selection of sub-circuit 110 logical
Cross its second output terminal 110c output clock signal Clk1.For select sub-circuit 110 above-mentioned working method, can by
Two paths are set to realize inside selection sub-circuit 110, i.e. the first access ch1 and alternate path ch2 in Fig. 5 are actually answered
In, it can be respectively arranged with switch in the two accesses, be provided with first switch K1 in the first access ch1, in alternate path
It is provided with second switch K2, selects the working method of sub-circuit 110 can be with are as follows: when display equipment works normally, closure first is opened
It closes K1 and turns off second switch K2, the first access ch1 is on state at this time, and alternate path ch2 is off-state, i.e. selection
Circuit 110 exports clock signal Clk1 by the first output end 110b, when display equipment is estimated, turns off first switch K1 and is simultaneously closed
Second switch K2, the first access ch1 is off-state at this time, and alternate path ch2 is on state, i.e. selection sub-circuit 110 is logical
Cross second output terminal 110c output clock signal Clk1.
It should be noted that selection sub-circuit 110 of the above-mentioned Fig. 3 of the present invention into embodiment illustrated in fig. 5, inside can match
It is equipped with the clock signal Clk1 voltage value V for detecting inputclk1The functional module of size passes through clock signal Clk1 voltage
Value Vclk1Determine that display equipment is currently at normal operating conditions and is in off-mode.Furthermore it is also possible to by selecting
110 exterior arrangement of sub-circuit be used for detect show equipment working state hardware mould group, as the following examples in structure and function
Energy.
Optionally, Fig. 6 is the structural schematic diagram of another signal conversion circuit provided in an embodiment of the present invention.In Fig. 5 institute
It can also include: output in the structure basis for showing signal conversion circuit 100, in the signal conversion circuit 100 of the embodiment of the present invention
End 130a is connected to the detecting sub-circuit 130 of selection sub-circuit 110.
Detecting sub-circuit 130 in the embodiment of the present invention can be electric to selection by the current state of detecting display equipment
Road 110 exports corresponding electric signal, and working method can be with are as follows: detecting sub-circuit 130, for detecting display equipment shutdown
When export high level, be also used to detect display equipment work normally when export low level；Based on above-mentioned detecting sub-circuit 130
The mode of varying level is exported, the selection sub-circuit 110 in the embodiment of the present invention is also used to export height in detecting sub-circuit 130
When level, alternate path ch2 is connected to export clock signal Clk1 from second output terminal 110c, is also used in detecting sub-circuit
When 130 output low level, the first access ch1 is connected to export clock signal Clk1 from the first output end 110b.
In the signal conversion circuit 100 of the embodiment of the present invention, the input terminal 130b of detecting sub-circuit 130 is for accessing logic
The voltage value size V_ of signal Dis, logical signal DisDisThe current state that display equipment can be reflected, for example, when this is patrolled
Collect the voltage value V_ of signal DisDisWhen less than pre-set threshold voltage, it is believed that display equipment is in the state shut down,
As the voltage value V_ of logical signal DisDisWhen more than or equal to threshold voltage, it is believed that display equipment is in the shape worked normally
State, i.e. detecting sub-circuit 130, are also used to the voltage value V_ in the logical signal Dis for detecting inputDisWhen less than threshold voltage,
High level is exported, selects sub-circuit 110 to pass through its second output terminal 110c output drive signal (for example, clock signal at this time
Clk1)；It is also used to the voltage value V_ in the logical signal Dis for detecting inputDisWhen more than or equal to threshold voltage, export low
Level selects sub-circuit 110 to pass through its first output end 110b output drive signal at this time.
Optionally, Fig. 7 is the structural schematic diagram of another signal conversion circuit provided in an embodiment of the present invention.In Fig. 6 institute
In the structure basis for showing signal conversion circuit 100, in the signal conversion circuit 100 of the embodiment of the present invention, detecting sub-circuit 130 can
To include: detecting voltage unit 131 that input terminal 130b is connected to logical signal Dis, the output end of detecting voltage unit 131 is logical
Overcurrent trigger unit 132 is connected to the output end 130a of detecting sub-circuit 130, and output end 130a can also pass through third electricity
Hinder R3Ground connection.It can be in addition, in signal conversion circuit 100 shown in Fig. 7, between output end 130a and current trigger unit 132
It is provided with the 4th resistance R4, select the second output terminal 110c of sub-circuit 110 and the first input end 121a of operational amplifier 121
Between be also provided with the 5th resistance R5。
In the signal conversion circuit 100 of the embodiment of the present invention, current trigger unit 132, in detecting voltage unit 131
Detect the voltage value V_ of the logical signal Dis of inputDisWhen less than threshold voltage, the first electric current I is exported1, so that detecting son electricity
The voltage value V for the handoff trigger signal that road 130 exportspAre as follows:
Vp=I1*R3；(2)
In above-mentioned formula (2), VpFor the voltage value for the handoff trigger signal that detecting sub-circuit 130 exports, I1For the first electric current
Current value, R3For the resistance value of 3rd resistor.
A kind of hardware implementation mode of detecting sub-circuit 130 is illustrated in embodiment illustrated in fig. 7, signal conversion in Fig. 7
The working method of circuit can be with are as follows: when display equipment works normally, the electricity of the logical signal Dis of input voltage detecting unit 131
Pressure value V_DisIt is higher, for example, logical signal Dis voltage value between 2.8V~3.3V, detecting voltage unit 131 detects this
Voltage value belongs to normal range of operation, at this point, will not trigger current trigger unit 132 export electric current, it is believed that current trigger unit
The current value of 132 place accesses is 0, i.e. the output end 130a of detecting sub-circuit 130 exports low level, correspondingly, selects son electricity
First passage ch1 is connected inside road 110 to pass through the first output end 110b to display panel output drive signal (for example, clock
Signal Clk1), as the clock signal Clk1 for being used to carry out grid line scanning in display panel under normal display state；Display is set
When standby shutdown, the voltage value V_ of logical signal DisDisIt begins to decline, works as V_DisWhen declining to a certain extent, such as logical signal
When the voltage value of Dis drops to less than threshold voltage, trigger current trigger unit 132 exports certain electric current and (exports first
Electric current I1), at this point, the output end 130a of detecting sub-circuit 130 exports high level, i.e. output handoff trigger signal, and the switching
The voltage value V of trigger signalp=I1*R3, correspondingly, select sub-circuit 110 from first passage ch1 be switched to second channel ch2 with
By second output terminal 110c to amplification 120 output drive signal of sub-circuit, which puts by amplification sub-circuit 120
To display panel output driving amplified signal after big processing, to open the TFT release residual electricity in display panel during shutdown
Lotus.
As shown in figure 8, a kind of schematic diagram of sequential relationship in the signal conversion circuit provided for embodiment illustrated in fig. 7, Fig. 8
Illustrate that above-mentioned display equipment works normally the variation tendency with logical signal Dis voltage value in shutdown process in shown timing,
And illustrate signal conversion circuit 100 display equipment different conditions under, the clock signal of input signal conversion circuit 100
Clock signal Clk1 that the sequential relationship and signal conversion circuit 100 of Clk1 and logical signal Dis export (or clock amplifies
Signal Clk2) voltage swing relationship.As can be seen that when being worked normally due to display equipment, and start the one small of shutdown
In the section time, due to the voltage value V_ of logical signal DisDisThere are no drop to threshold voltage hereinafter, the dotted line left side in i.e. Fig. 8
Period in, the output of signal conversion circuit 100 is clock signal Clk1, and the voltage of the clock signal Clk1 exported at this time
Value is Vclk1, in the partial time period, there is no clock amplified signal Clk2 in Fig. 8, as the voltage value V_ of logical signal DisDis
Drop to threshold voltage hereinafter, in period in i.e. Fig. 8 on the right of dotted line, signal conversion circuit 100 is by the clock signal of input
Clk1 exports clock amplified signal Clk2, and the voltage value of clock amplified signal Clk2 after amplifying processing are as follows:
Vclk2=(1+R2/R1)Vclk1, this section of time clock signal Clk1 is schematically embodied in Fig. 8 and clock amplifies
The size relation of signal Clk2 voltage value.
It should be noted that may be provided for inside the selection sub-circuit 110 of the embodiment of the present invention to handover trigger
Signal amplifies the operational amplifier of processing, to improve selection sub-circuit 110 to the susceptibility of handoff trigger signal.
The signal conversion circuit 100 that the above embodiment of the present invention provides passes through setting selection sub-circuit 110, amplification son electricity
Road 120 and detecting sub-circuit 130, select sub-circuit 110 can be by the phase to detecting 130 output end level high point of sub-circuit
It answers, selective conducting first passage ch1 or second channel ch2, i.e., selective is defeated by the first output end 110b or second
Outlet 110c output drive signal.When showing that equipment works normally, the clock signal Clk1 of input signal conversion circuit 100 passes through
First passage ch1 is output to display panel, consistent with the output state of current mainstream L/S circuit (to be referred to L/S shown in Fig. 1
Circuit 50)；Show equipment shutdown when, by logical signal Dis control selections sub-circuit 110 by the output channel of driving signal by
First passage ch1 is switched to second channel ch2, and under the action of amplifying sub-circuit 120, the voltage value of driving signal is amplified (1
+R2/R1) times after be output to display panel, allowing in display panel has enough voltage to open TFT to discharge residual charge,
There is the bad phenomenon of ghost when so as to avoid shutdown.
Based on the signal conversion circuit 100 that the above embodiment of the present invention provides, the embodiment of the present invention also provides a kind of signal
Conversion method, the signal conversion method are executed by the signal conversion circuit 100 that any of the above-described embodiment of the present invention provides, such as Fig. 9
It is shown, it is a kind of flow chart of signal conversion method provided in an embodiment of the present invention, which includes the following steps:
S310 is used to indicate the driving signal of shutdown to signal conversion circuit input；
S320 controls the drive amplification after the signal conversion circuit exports enhanced processing to the drive signal line of display panel
Signal.
Signal conversion of the signal conversion method provided in an embodiment of the present invention in any implementation as shown in above-mentioned Fig. 3 to Fig. 7
Circuit 100 executes, the specific structure of the signal conversion circuit 100, wherein the function that each sub-circuit and electronic component are realized
It has been described in the above-described embodiments, therefore details are not described herein.Equally given so that driving signal is clock signal Clk1 as an example
With explanation, it is used to carry out the clock signal of GOA circuit to be entered based on the signal conversion circuit in the above embodiment of the present invention
The processing of level conversion, so that the voltage value of the clock signal Clk2 of input display panel can satisfy the normal aobvious of display panel
Show, and the feature of the timing requirements during shutdown etc..Common, T-Con is transferred directly to the first of signal conversion circuit 100
The beginning voltage value of clock signal Clk0 is smaller, for example, 3.3V, reaches after can amplifying to initial clock signal Clk0
The cut-in voltage V of TFT unlocking conditionghThe clock signal Clk1, V of sizegh(i.e. Vclk1) it is, for example, 20V~30V, the clock signal
Clk1 is the input signal of signal conversion circuit.
When showing equipment shutdown, due to the voltage value V of the initial clock signal Clk0 of T-Con circuit outputclk0It can be fast
Speed reduces, so that the voltage value V of the clock signal Clk1 of inputclk1It can reduce rapidly, at this point, if signal conversion circuit directly will
The clock signal Clk1 of input is exported to display panel, due to showing the influence of equipment shutdown timing, clock signal Clk1's
Voltage value Vclk1It is difficult to reach the cut-in voltage V for opening TFT in display panelgh, therefore, it is impossible to sufficiently in display panel
TFT discharges charge, to occur the bad phenomenon of ghost during shutdown, above situation is the scheme of the prior art and existing
Problem.
For above-mentioned the problems of the prior art, using the signal conversion circuit in the above embodiment of the present invention to input
Clock signal Clk1 executes the mode of signal conversion are as follows: when showing equipment shutdown, to the clock letter of signal conversion circuit input
It reduces a lot when the voltage value of number Clk1 can be than normally showing, the clock signal Clk1 that voltage value reduces can be passed through and indicate display
Equipment has currently entered shutdown process, exports at amplification to control the signal conversion circuit to the drive signal line of display panel
Clock amplified signal Clk2 after reason.Based on the structure and function for selecting sub-circuit in any embodiment shown in Fig. 3 to Fig. 7 of the present invention
Can, the clock signal Clk1 exported in shutdown process by its second output terminal is after amplifying the enhanced processing of sub-circuit, Xiang Xian
Show grid output the clock amplified signal Clk2, the voltage value V of clock amplified signal Clk2 of panelclk2It can achieve for opening
Open the cut-in voltage V of TFT in display panelgh.That is, when display equipment shutdown in input display panel TFT grid
Clock amplified signal Clk2 can effectively open TFT, to discharge the residual charge in display panel, so as to improve even being eliminated
There is the bad phenomenon of ghost when the shutdown of existing display equipment.
Signal conversion method provided in an embodiment of the present invention, using the signal in any embodiment shown in above-mentioned Fig. 3 to Fig. 7
Conversion circuit executes conversion, by being used to indicate the driving signal of shutdown to signal conversion circuit input, and should by control
Signal conversion circuit to the grid of display panel export enhanced processing after drive amplification signal；Signal in the embodiment of the present invention
Conversion method, the driving signal that voltage value in shutdown process is pulled low is after the enhanced processing of signal conversion circuit, Xiang Xian
Show that panel output can achieve TFT cut-in voltage VghDrive amplification signal, it can be ensured that display equipment shutdown when have it is enough
Time and voltage can open the TFT in display panel, discharge residual charge, to avoid the bad existing of ghost occur when shutdown
As.
It should be noted that signal conversion circuit executes conversion when the display equipment shutdown of process major embodiment shown in Fig. 9
Mode, and to it is existing display equipment shutdown when level conversion improvement mode.The signal that the above embodiment of the present invention provides
Conversion circuit can equally execute the display equipment under normal operating conditions and correspondingly operate, as shown in Figure 10, for the present invention
The flow chart for another signal conversion method that embodiment provides, on the basis of process shown in Fig. 9, the embodiment of the present invention is provided
Signal conversion method can also include:
S300 is used to indicate the driving signal for executing display to signal conversion circuit input；
S301 controls the signal conversion circuit to the drive signal line of display panel and exports the driving signal.
It is equally explained so that driving signal is clock signal Clk1 as an example, signal conversion is had been described above in above-described embodiment
Circuit can achieve TFT cut-in voltage V to display panel output during showing equipment shutdownghClock amplify letter
Number Clk2；Display equipment other states under, such as display equipment normally show during, it is defeated to the signal conversion circuit
The voltage value V of the clock signal Clk1 enteredclk1It can achieve TFT cut-in voltage Vgh, can be believed by the clock of normal voltage value
Number Clk1 instruction display equipment is currently at normal operating conditions, and the clock signal Clk1 of input is used to indicate display panel execution
Normal display operation exports clock signal Clk1 to the grid of display panel to control the signal conversion circuit, this when
Clock signal Clk1 is as the driving signal for being used to carry out grid line scanning in display panel, voltage value Vclk1Size can satisfy
The TFT in respective scanned row is opened, so that display panel realizes normal display function.
Based on the signal conversion circuit 100 that the above embodiment of the present invention provides, the embodiment of the present invention also provides a kind of driving
Circuit.
It as shown in figure 11, is a kind of structural schematic diagram of driving circuit provided in an embodiment of the present invention.The embodiment of the present invention
May include: in the driving circuit 10 of offer gate driving circuit (i.e. GOA circuit) 200 and at least one as above-mentioned Fig. 3 is arrived
Signal conversion circuit 100 shown in any embodiment in Fig. 7, wherein the output end of each signal conversion circuit 100 is connected to
The input terminal of GOA circuit 200.
It may include multiple signal conversion circuits 100 in the driving circuit 10 of the embodiment of the present invention, each signal conversion electricity
Road 100 can receive a driving signal of T-Con circuit output, and input the received driving of each signal conversion circuit 100
Signal is, for example, clock signal (Clk), de-noising signal (dde or ddo) or frame start signal (STV)；6 letters are illustrated in Figure 11
Number conversion circuit 100, and give so that the clock signal for inputting this 6 signal conversion circuits 100 is respectively Clka~Clkf as an example
It shows, in addition, Figure 11 illustrates 6 input terminals (i.e. 200a~200f) in GOA circuit 200, and GOA circuit 200 is every
A input terminal is connected with the output end of corresponding signal conversion circuit 100.
It should be noted that the embodiment of the present invention does not limit signal conversion circuit 100, the number of the signal conversion circuit 100
Amount can be determined that the quantity of clock signal can be 6, be also possible to 10 by the quantity of the driving signal of T-Con circuit output
A, the quantity of clock signal and the cascade driving method of GOA circuit 200 are related.In addition, the embodiment of the present invention is equally to show
In the state that equipment works normally, the voltage of the clock signal Clk1 of input signal conversion circuit 100 refers to reach TFT open strip
The cut-in voltage V of partghFor shown.
Based on the structure of driving circuit 10 shown in Figure 11, the driving circuit 10, for when showing equipment shutdown, control to be every
The selection sub-circuit 110 of a signal conversion circuit 100 is from second output terminal 110c output drive signal VGOA1, with to GOA circuit
200 transmission drive amplification signals.
Be input in the embodiment of the present invention signal conversion circuit 100 driving signal equally may include it is following wherein it
One: clock signal (Clk), de-noising signal (dde or ddo) or frame start signal (STV) etc..The embodiment of the present invention is equally with input
The driving signal of 6 signal conversion circuits 100 is respectively to be explained for clock signal Clka~Clkf.The embodiment of the present invention
The driving circuit 10 of offer can reasonably sweep the TFT in display panel under the different working condition of display equipment
Retouch driving.By the shutdown timing of existing display panel it is found that when display equipment is shut down, it is desirable that open all TFT in display panel
To discharge charge, it is just avoided that the phenomenon that there are ghosts when display equipment is shut down in this way.However, existing display equipment is being shut down
When, since the voltage value of clock signal Clka~Clkf of T-Con circuit output can reduce rapidly, it is difficult to reach aobvious for opening
Show the cut-in voltage V of TFT in panelgh, therefore, it is impossible to sufficiently charge be discharged to TFT in display panel, to occur during shutdown
The bad phenomenon of ghost, above situation be the prior art scheme and there are the problem of.
Structure, working method and beneficial effect based on the signal conversion circuit 100 provided in the above embodiment of the present invention,
It, can will be in shutdown process when being driven using driving circuit 10 provided in an embodiment of the present invention to the TFT in display panel
Clock signal Clka~Clkf that voltage value is pulled low is defeated to display panel after the enhanced processing of signal conversion circuit 100
It can achieve TFT cut-in voltage V outghClock amplified signal, it can be ensured that display equipment shutdown when have time enough and electricity
Pressure can open the TFT in display panel, discharge residual charge, to avoid the bad phenomenon of ghost occur when shutdown.
It should be noted that being also used to normal in display equipment in above-mentioned driving circuit 10 provided in an embodiment of the present invention
When work, the selection sub-circuit 110 of each signal conversion circuit 100 is controlled from the first output end 110b output drive signal, with
The driving signal is transmitted to GOA circuit 200.
Driving circuit 10 is had been described above in above-described embodiment can control each signal during showing equipment shutdown
The selection sub-circuit 110 of conversion circuit 100 exports clock signal Clka~Clkf from its second output terminal 110c, is turned based on signal
The performance of circuit 100 is changed, can receive to all grid lines of display panel meet TFT cut-in voltage V at this timeghClock put
Big signal；Display equipment other states under, such as display equipment normally show during, it is desirable that pass through driving circuit 10
Display panel is scanned to realize normal display operation, at this point, clock signal Clka~Clkf of input display panel
Voltage value can achieve TFT cut-in voltage Vgh, these clock signals Clka~Clkf, which is used as, to be used to carry out in display panel
The driving signal of grid line scanning, at this point, driving circuit 10 can pass through the selection sub-circuit 110 of control signal conversion circuit 100
From the first output end 110b export clock signal Clka~Clkf, thus to GOA circuit 200 transmit clock signal Clka~
Clkf, to execute correspondingly scan operation, so that display panel realizes normal display function.
Based on the driving circuit 10 that the above embodiment of the present invention provides, the embodiment of the present invention also provides a kind of display device,
It as shown in figure 12, is a kind of structural schematic diagram of display device provided in an embodiment of the present invention.It is provided in an embodiment of the present invention aobvious
Showing device includes: display panel 20, and the driving circuit 10 in such as above-mentioned any embodiment, the GOA in the driving circuit 10
Circuit 200 is connected with display panel 20, the structure of driving circuit 10 with reference to shown in Figure 11, and the input terminal of driving circuit 10 includes
The input terminal of all signal conversion circuits 100 in the driving circuit 10, the connection type of the 10 each circuit in inside of driving circuit, GOA
The connection type and dynamic circuit 10 of circuit 200 and display panel 20 drive display panel 20 normally to be shown and shut down
Mode has been described in detail in the above-described embodiments, therefore details are not described herein.
In practical applications, display device provided in an embodiment of the present invention further include: T-Con circuit 30, the T-Con circuit
30 include multiple output ends for output drive signal, and these output ends are connected with the input terminal of signal conversion circuit 100
It connects, T-Con circuit 30, for transmitting driving signal to the input terminal of each signal conversion circuit 100, the T-Con circuit 30 is defeated
It is, for example, out clock signal (Clk1), de-noising signal (dde or ddo) or frame to the driving signal of a signal conversion circuit 100
Initial signal (STV).It is only illustrated in Figure 12 in T-Con circuit 30 for exporting 6 of clock signal Clka~Clkf respectively
Output end (i.e. 30a~30f), this 6 output ends are connected respectively to the input terminal of corresponding signal conversion circuit 100.
It should be noted that the embodiment of the present invention does not limit the quantity that T-Con circuit 30 exports clock signal, such as can be with
6 clock signals are exported, 10 clock signals, the quantity of clock signal and the cascade driving side of GOA circuit 200 can also be exported
Formula is related, and the driving signal of the T-Con circuit 30 output further includes above-mentioned de-noising signal (dde and ddo) and frame start signal
(STV) etc..
Structure, working method and beneficial effect based on the signal conversion circuit 100 provided in the above embodiment of the present invention,
Display device provided in an embodiment of the present invention can when being driven by gate driving circuit 10 to the TFT in display panel 20
Pass through the enhanced processing of signal conversion circuit 100 with the clock signal Clka~Clkf for being pulled low voltage value in shutdown process
Afterwards, it can achieve TFT cut-in voltage V to the output of display panel 20ghClock amplified signal, it can be ensured that display device shut down when
There are time enough and voltage that can open the TFT in display panel 20, discharge residual charge, to avoid occurring when shutdown residual
The bad phenomenon of shadow.
Based on the gate driving circuit 10 that the above embodiment of the present invention provides, the embodiment of the present invention also provides a kind of display dress
The driving method set, the driving method are executed by the display device that any of the above-described embodiment of the present invention provides, and as shown in figure 13, are
A kind of flow chart of the driving method of display device provided in an embodiment of the present invention, the driving method include the following steps:
S410, the output end for controlling T-Con circuit are used to indicate the driving signal of shutdown to signal conversion circuit output；
S420 controls the selection sub-circuit of each signal conversion circuit from second output terminal output drive signal, and to defeated
The driving signal entered amplifies processing, and amplified drive amplification signal is output to display panel.
Display of the driving method of display device provided in an embodiment of the present invention in any embodiment as shown in above-mentioned Figure 12
Device executes, the specific structure of the display device, and the function that internal each circuit, sub-circuit and electronic component are realized is upper
It states in embodiment and has been described in, therefore details are not described herein.It can be based on the display device in the above embodiment of the present invention
The feature of reasonable turntable driving is carried out under different working condition to the TFT in display panel.By the shutdown of existing display device
Timing is it is found that when display device is shut down, it is desirable that opens all TFT in display panel and is just avoided that display in this way to discharge charge
The phenomenon that there are ghosts when device shuts down.However, existing display device is during shutdown, since the clock of T-Con circuit output is believed
The voltage value of number Clk1 can reduce rapidly, it is difficult to reach the cut-in voltage V for opening TFT in display panelgh, therefore, it is impossible to
Charge sufficiently is discharged to TFT in display panel, to occur the bad phenomenon of ghost during shutdown, above situation is existing skill
The scheme of art and there are the problem of.
It should be noted that the embodiment of the present invention is equally in the state that display device works normally, input signal turns
The voltage value for changing the clock signal Clk1 of circuit is the cut-in voltage V for reaching TFT unlocking conditionghFor shown.
Structure, working method and beneficial effect based on the signal conversion circuit provided in the above embodiment of the present invention, are adopted
When being driven with display device provided in an embodiment of the present invention, the clock signal that voltage value in shutdown process can be pulled low
Clk1 can achieve TFT cut-in voltage V after the enhanced processing of signal conversion circuit, to display panel outputghClock put
Big signal Clk2, it can be ensured that have time enough and voltage that can open the TFT in display panel when display equipment shutdown, release
Residual charge is put, to avoid the bad phenomenon of ghost occur when shutdown.
It should be noted that driving circuit executes the side of driving when the display device shutdown of process major embodiment shown in Figure 13
Formula, and to existing signal conversion circuit shut down when drive TFT improvement mode.The driving side that the above embodiment of the present invention provides
Method can equally execute the display device under normal operating conditions and correspondingly operate, and be the embodiment of the present invention as shown in figure 14
The flow chart of the driving method of another display device of offer, on the basis of the process shown in Figure 13, the embodiment of the present invention is mentioned
The driving method of the display device of confession can also include:
S400, the output end for controlling T-Con circuit are used to indicate the clock letter normally shown to signal conversion circuit output
Number；
S401 controls the selection sub-circuit of each signal conversion circuit from the first output end output drive signal, and should
Driving signal is output to display panel.
Display device is had been described above in above-described embodiment can control the output end of T-Con circuit during its shutdown
Output is used to indicate the clock signal Clk1 of shutdown, the performance based on signal conversion circuit, at this time all drivings of display panel
Signal wire, which can receive, meets TFT cut-in voltage VghClock amplified signal Clk2；Under other states of display device, example
During normally being shown such as display device, it is desirable that be scanned to display panel by GOA circuit to realize normal display
Operation, at this point, the voltage value V of the clock signal Clk1 of input display panelclk1It can achieve TFT cut-in voltage Vgh, the clock
Signal Clk1 is to be used as the driving signal that grid line scanning is carried out in display panel；And hence it is also possible to pass through control T-Con circuit
Output end is used to indicate the clock signal Clk1 normally shown to signal conversion circuit output, to execute correspondingly scan operation,
So that display panel realizes normal display function.
The embodiment of the present invention also provides a kind of computer readable storage medium, which has can
It executes instruction, which may be implemented the signal conversion that any of the above-described embodiment of the present invention provides when being executed by processor
Method, alternatively, the display dress that any of the above-described embodiment of the present invention provides may be implemented in the executable instruction when being executed by processor
The driving method set.The embodiment and the above embodiment of the present invention of computer readable storage medium provided in an embodiment of the present invention
The driving method of the display panel of offer is essentially identical, and this will not be repeated here.
Although disclosed herein embodiment it is as above, the content only for ease of understanding the present invention and use
Embodiment is not intended to limit the invention.Technical staff in any fields of the present invention is taken off not departing from the present invention
Under the premise of the spirit and scope of dew, any modification and variation, but the present invention can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (16)
1. a kind of signal conversion circuit characterized by comprising selection sub-circuit and amplification sub-circuit；
For the input terminal of the selection sub-circuit for accessing driving signal, the first output end is connected to the driving signal of display panel
Line, second output terminal are connected to the drive signal line of the display panel by the amplification sub-circuit；
The selection sub-circuit is used for when showing equipment shutdown, from the second output terminal output drive signal；
The amplification sub-circuit, the driving signal for exporting to the second output terminal amplify processing, will be amplified
Drive amplification signal is output to the display panel.
2. signal conversion circuit according to claim 1, which is characterized in that
The selection sub-circuit is also used to export the drive from first output end when the display equipment is worked normally
Dynamic signal.
3. signal conversion circuit according to claim 1, which is characterized in that the amplification sub-circuit includes: operation amplifier
Device, first resistor and second resistance；
The first input end of the operational amplifier connects the second output terminal of the selection sub-circuit, and the second input terminal passes through institute
First resistor ground connection is stated, and connects the second resistance between the first resistor and the output end of the operational amplifier.
4. signal conversion circuit according to claim 3, which is characterized in that after the amplification sub-circuit enhanced processing
The voltage value of the drive amplification signal of output are as follows:
Wherein, the VGOA2For the voltage value of the drive amplification signal of operational amplifier output, the R1For first electricity
The resistance value of resistance, the R2For the resistance value of the second resistance, the VGOA1For the driving letter of the operational amplifier of input
Number voltage value.
5. signal conversion circuit according to claim 1, which is characterized in that the selection sub-circuit includes: access in parallel
The first access and alternate path of driving signal, first access are connected to first output end, and the alternate path connects
It is connected to the second output terminal；
The selection sub-circuit is also used to be connected described in first access and disconnection when the display equipment works normally
Alternate path disconnects first access and the alternate path is connected in display equipment shutdown.
6. signal conversion circuit according to claim 5, which is characterized in that further include: output end is connected to the selection
The detecting sub-circuit of sub-circuit；
The detecting sub-circuit is also used to for exporting high level when detecting display equipment shutdown detecting
It states when display equipment works normally and exports low level；
The selection sub-circuit is also used to that the alternate path is connected with from institute when the detecting sub-circuit exports high level
It states second output terminal and exports the driving signal, be also used to the conducting described first when the detecting sub-circuit exports low level
Access is to export the driving signal from first output end.
7. signal conversion circuit according to claim 6, which is characterized in that the input terminal of the detecting sub-circuit is for connecing
Enter logical signal；
The detecting sub-circuit is also used to when the voltage value for the logical signal for detecting input is less than threshold voltage, defeated
High level out is also used to when the voltage value for the logical signal for detecting input is greater than or equal to the threshold voltage, defeated
Low level out.
8. signal conversion circuit according to claim 6, which is characterized in that the detecting sub-circuit includes: that input terminal connects
It is connected to the detecting voltage unit of the logical signal, the output end of the detecting voltage unit is connected to by current trigger unit
The output end of the detecting sub-circuit, the output end are grounded by 3rd resistor；
The current trigger unit is small for detecting the voltage value of the logical signal of input in the detecting voltage unit
When threshold voltage, the first electric current is exported, so that the voltage value of the handoff trigger signal of the detecting sub-circuit output are as follows:
Vp=I1*R3；
Wherein, the VpFor the voltage value of the handoff trigger signal of the detecting sub-circuit output, the I1It is described first
The current value of electric current, the R3For the resistance value of the 3rd resistor.
9. signal conversion circuit described according to claim 1~any one of 8, which is characterized in that the input selection electricity
The driving signal of the input terminal on road includes one of: clock signal, de-noising signal and frame start signal.
10. a kind of signal conversion method, which is characterized in that using such as signal according to any one of claims 1 to 9 conversion electricity
Road executes the signal conversion method, which comprises
The driving signal of shutdown is used to indicate to signal conversion circuit input；
Control the drive amplification signal after the signal conversion circuit exports enhanced processing to the drive signal line of display panel.
11. signal conversion method according to claim 10, which is characterized in that further include:
The driving signal for executing display is used to indicate to signal conversion circuit input；
It controls the signal conversion circuit and exports the driving signal to the drive signal line of the display panel.
12. a kind of driving circuit characterized by comprising gate driving circuit and at least one as in claim 1~9
The output end of described in any item signal conversion circuits, each signal conversion circuit is connected to the gate driving circuit
Input terminal；
The driving circuit, for when showing equipment shutdown, control the selection sub-circuit of each signal conversion circuit from
Second output terminal output drive signal, to transmit drive amplification signal to the gate driving circuit.
13. driving circuit according to claim 12, which is characterized in that
The driving circuit is also used to control the choosing of each signal conversion circuit when the display equipment works normally
Sub-circuit is selected from the first output end output drive signal, to transmit the driving signal to the gate driving circuit.
14. a kind of display device characterized by comprising display panel and driving as described in claim 12 or 13 electricity
Road, the gate driving circuit in the driving circuit are connected with the display panel.
15. display device according to claim 14, which is characterized in that further include: sequence controller, the timing control
Device includes multiple output ends for output drive signal, the output end of the sequence controller and the signal conversion circuit
Input terminal is connected；
The sequence controller, for transmitting driving signal to the input terminal of each signal conversion circuit.
16. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has executable finger
It enables, the executable instruction realizes signal conversion method as described in claim 10 or 11 when being executed by processor.
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| CN201910326991.5A CN110021258B (en) | 2019-04-23 | 2019-04-23 | Signal conversion circuit and method, driving circuit and display device |
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| CN201910326991.5A CN110021258B (en) | 2019-04-23 | 2019-04-23 | Signal conversion circuit and method, driving circuit and display device |
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