CN110164361A - A kind of pixel-driving circuit and its driving method and display panel - Google Patents

A kind of pixel-driving circuit and its driving method and display panel Download PDF

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Publication number
CN110164361A
CN110164361A CN201910487031.7A CN201910487031A CN110164361A CN 110164361 A CN110164361 A CN 110164361A CN 201910487031 A CN201910487031 A CN 201910487031A CN 110164361 A CN110164361 A CN 110164361A
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China
Prior art keywords
circuit
pixel
sub
charging
pressure stabilizing
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CN201910487031.7A
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CN110164361B (en
Inventor
陈瑶
高超
李海燕
陈燕武
古涛
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BOE Technology Group Co Ltd
Chongqing BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chongqing BOE Optoelectronics Technology Co Ltd
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Priority to CN201910487031.7A priority Critical patent/CN110164361B/en
Publication of CN110164361A publication Critical patent/CN110164361A/en
Priority to PCT/CN2020/084509 priority patent/WO2020244309A1/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The embodiment of the invention discloses a kind of pixel-driving circuit and its driving methods and display panel.Pixel-driving circuit includes: charging sub-circuit and pressure stabilizing sub-circuit, precharging signal end and scanning signal end in parallel is electrically connected with the first input end of charging sub-circuit respectively, second input terminal of charging sub-circuit is electrically connected with data signal end, output end is electrically connected with the first input end of pressure stabilizing sub-circuit, second input terminal of pressure stabilizing sub-circuit is electrically connected by pixel transistor with supply voltage, output end is electrically connected with common voltage, the precharging signal conducting charging sub-circuit that pixel-driving circuit passes through input, and pressure stabilizing sub-circuit is pre-charged by the first data-signal of charging sub-circuit input, the first voltage value of pressure stabilizing sub-circuit is less than or equal to threshold voltage after precharge.The embodiment of the present invention solve existing display panel during driving light emitting pixel, the problem that causes the pixel-driving circuit applicability lower since the charging time is long.

Description

A kind of pixel-driving circuit and its driving method and display panel
Technical field
This application involves but be not limited to display technology and field of circuit technology, espespecially a kind of pixel-driving circuit and its driving Method and display panel.
Background technique
It with the development of display technology and is widely applied, display equipment can configure different types of luminescent device, be based on The direction of the requirements at the higher level that user proposes display effect, display equipment towards higher resolution and refreshing frequency is developed.
Miniature (Micro) light emitting diode (Light Emitting Diode, referred to as are as follows: LED) (i.e. Micro LED) is The microminiaturization of LED array.Display panel (hereinafter referred to as are as follows: Micro LED panel) using Micro LED as luminescent device In, each Micro LED can be considered a pixel (Pixel), it can be operated alone and light each Micro LED, compared to Liquid crystal display device (Liquid Crystal Display, referred to as are as follows: LCD) and organic elctroluminescent device (Organic Electroluminance Display, referred to as are as follows: OLED), there is Micro LED panel high efficiency, pure photochromic, voltage to fit The advantages that spending, be low in energy consumption, the service life is long and reliability and durability.However, the pixel-driving circuit of traditional Micro LED panel is deposited In following problems: driving thin film transistor (TFT) (Drive Thin Film Transistor, the abbreviation of control Micro LED current Are as follows: DTFT) grid electric capacity of voltage regulation it is larger, and charging current is smaller, causes the charging time long, therefore, above-mentioned pixel driver Circuit is not suitable for the display panel of high-resolution and high refreshing frequency.
Summary of the invention
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of pixel-driving circuit and its driving method, And display panel, to solve the pixel-driving circuit of existing Micro LED panel during driving Micro LED, by In the problem that the charging time is long to cause the pixel-driving circuit applicability lower.
The embodiment of the present invention provides a kind of pixel-driving circuit, comprising: charging sub-circuit and pressure stabilizing sub-circuit；
Precharging signal end and scanning signal end in parallel is electrically connected with the first input end of the charging sub-circuit respectively Number, the second input terminal of the charging sub-circuit is electrically connected with data signal end, and the first of output end and the pressure stabilizing sub-circuit Input terminal electrical connection；
Second input terminal of the pressure stabilizing sub-circuit is electrically connected by pixel transistor with supply voltage, output end with it is public Voltage electrical connection；
The pixel-driving circuit, the precharging signal for the first input end input by the charging sub-circuit are led Lead to the charging sub-circuit, and the first data-signal pair of the second input terminal input of the charging sub-circuit by being connected The pressure stabilizing sub-circuit is pre-charged, after precharge the first voltage value of the first input end of the pressure stabilizing sub-circuit be less than or Equal to the threshold voltage for the pressure stabilizing sub-circuit to be connected.
Optionally, in pixel-driving circuit as described above, the charging sub-circuit includes: the first N-type metal oxide Semiconductor N MOS transistor, the grid of first NMOS transistor are electrically connected to the first input end of the charging sub-circuit, Drain electrode is electrically connected to the second input terminal of the charging sub-circuit, and source electrode is electrically connected to the output end of the charging sub-circuit.
Optionally, in pixel-driving circuit as described above, the pressure stabilizing sub-circuit includes: electric capacity of voltage regulation and pixel driver Transistor, the anode of the electric capacity of voltage regulation and the grid of the pixel driven transistor it is arranged side by side to be electrically connected to charging electric The source electrode of the output end on road, the cathode of the electric capacity of voltage regulation and the pixel driven transistor it is arranged side by side be electrically connected to it is described public Voltage, the drain electrode of the pixel driven transistor are electrically connected to the cathode of the pixel transistor, the sun of the pixel transistor Pole is electrically connected to the supply voltage.
Optionally, in pixel-driving circuit as described above, the voltage value of first data-signal is less than or equal to institute State the first voltage value.
Optionally, in pixel-driving circuit as described above, the pixel-driving circuit further include:
The switch being connected between the first input end of the pressure stabilizing sub-circuit and the grid of the pixel driven transistor The first input end of sub-circuit, the switch sub-circuit is electrically connected with the reference signal end for exporting reference signal, and second is defeated Enter the first input end that end is electrically connected to the pressure stabilizing sub-circuit, output end is electrically connected to the grid of the pixel driven transistor Pole；
The pixel-driving circuit is also used to indicate the charging sub-circuit by the preliminary filling telecommunications in the reference signal The switch sub-circuit is disconnected when number conducting, indicates that the charging sub-circuit is connected by the scanning signal in the reference signal When the switch sub-circuit is connected.
Optionally, in pixel-driving circuit as described above, the switch sub-circuit includes P type metal oxide semiconductor PMOS transistor and the second NMOS transistor, the grid of the PMOS transistor are electrically connected to the first defeated of the switch sub-circuit Enter end, source electrode is electrically connected to the supply voltage, and drain electrode is electrically connected with the grid of the 2nd NMOS, the leakage of the 2nd NMOS Pole is electrically connected to the second input terminal of the switch sub-circuit, and source electrode is electrically connected to the output end of the switch sub-circuit；
The pixel-driving circuit is also used to when the charging sub-circuit is connected in the precharging signal, to the ginseng It examines signal and provides high level to disconnect the PMOS transistor and second NMOS transistor, be connected in the clock electric signal When the charging sub-circuit, it is brilliant the PMOS transistor and the 2nd NMOS is connected to provide low level to the reference signal Body pipe.
Optionally, in pixel-driving circuit as described above, the voltage value of first data-signal is greater than described first Voltage value.
The embodiment of the present invention also provides a kind of driving method of pixel-driving circuit, using picture as described in any one of the above embodiments Plain driving circuit executes the driving method, and the driving method includes:
The charging sub-circuit is connected by inputting precharging signal to charging sub-circuit in first time period；
The charging sub-circuit be connected is pre-charged pressure stabilizing sub-circuit by the first data-signal inputted, in advance The first voltage value of the first input end of the pressure stabilizing sub-circuit is less than or equal to for the pressure stabilizing sub-circuit to be connected after charging Threshold voltage.
Optionally, in the driving method of pixel-driving circuit as described above, further includes:
The charging sub-circuit is connected by inputting scanning signal to the charging sub-circuit in second time period；
The charging sub-circuit be connected shows the pressure stabilizing sub-circuit by the second data-signal inputted Charging, the pressure stabilizing sub-circuit is connected and opens pixel transistor, the pressure stabilizing sub-circuit after the pixel transistor is opened First input end second voltage value be equal to second data-signal voltage value.
Optionally, in the driving method of pixel-driving circuit as described above,
The charging time of the second time period are as follows:
t2≈RC*Ln[(Vdata-V1)/(Vdata-aVdata)]；
Wherein, the RC is the charging constant of the electric capacity of voltage regulation, the VdataIt is the pressure stabilizing sub-circuit described The target voltage values that two periods charged, the V1For the pressure stabilizing sub-circuit the second time period initial voltage Value, a are the charging saturation coefficient of the pressure stabilizing sub-circuit.
Optionally, in the driving method of pixel-driving circuit as described above,
The first time period is that the failing edge of the frame end signal of each frame arrives the frame start signal of next frame later Period between failing edge, alternatively, failing edge of the first time period for the frame start signal of predetermined time to first frame Between period；
The second time period is the preset time after the rising edge or failing edge of the frame start signal of each frame to institute Pressure stabilizing sub-circuit is stated to carry out showing that the voltage value of charging reaches the period between the voltage value of second data-signal.
Optionally, in the driving method of pixel-driving circuit as described above,
The voltage value of first data-signal is less than or equal to the first voltage value in the first time period.
Optionally, in the driving method of pixel-driving circuit as described above, the pressure stabilizing sub-circuit includes charging and voltage stabilizing Capacitor and pixel driven transistor, the electrical connection arranged side by side with the grid of the pixel driven transistor of the anode of the electric capacity of voltage regulation To the output end of the charging sub-circuit, the source electrode of the cathode of the electric capacity of voltage regulation and pixel driven transistor electricity arranged side by side It is connected to the common voltage, the drain electrode of the pixel driven transistor is electrically connected to the cathode of the pixel transistor, described The anode of pixel transistor is electrically connected to the supply voltage；The voltage value of first data-signal in the first time period Greater than the first voltage value, the pixel-driving circuit further include:
The switch being connected between the first input end of the pressure stabilizing sub-circuit and the grid of the pixel driven transistor The first input end of sub-circuit, the switch sub-circuit is electrically connected with the reference signal end for exporting reference signal, and second is defeated Enter the first input end that end is electrically connected to the pressure stabilizing sub-circuit, output end is electrically connected to the grid of the pixel driven transistor Pole；The driving method further include:
The switch sub-circuit is disconnected by the reference signal instruction of output in the first time period, to disconnect The pressure stabilizing sub-circuit；
The switch sub-circuit is connected by the reference signal instruction of output in the second time period, to be connected The pressure stabilizing sub-circuit.
The embodiment of the present invention also provides a kind of display panel, comprising: the pixel transistor of array setting, and such as above-mentioned Pixel-driving circuit described in one；
The pixel transistor one-to-one correspondence is electrically connected with the pixel-driving circuit, wherein the i-th row jth arranges described Pixel transistor is coupled by corresponding pixel-driving circuit and the coupling of the i-th horizontal scanning line and with jth column data line.
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 the drive of pixel-driving circuit as described in any one of the above embodiments when being executed by processor Dynamic method.
Pixel-driving circuit and its driving method and display panel provided in an embodiment of the present invention, wherein pixel driver Circuit includes charging sub-circuit and pressure stabilizing sub-circuit, precharging signal end in parallel and scanning signal end respectively with charging sub-circuit First input end electrical connection, the second input terminal of the charging sub-circuit be electrically connected with data signal end, and output end is sub with pressure stabilizing The first input end of circuit is electrically connected, and the second input terminal of the pressure stabilizing sub-circuit passes through pixel transistor and supply voltage VDDIt is electrically connected It connects, output end and common voltage VSSElectrical connection, the pixel-driving circuit of above structure can pass through the first defeated of sub-circuit that charge The charging sub-circuit is connected in the precharging signal CH for entering end input, and defeated by the second input terminal of the charging sub-circuit be connected The the first data-signal Data1 entered is pre-charged pressure stabilizing sub-circuit, the first input end of the pressure stabilizing sub-circuit after precharge The first voltage value V1Less than or equal to the threshold voltage V for the pressure stabilizing sub-circuit to be connectedth；It is provided using the embodiment of the present invention Pixel-driving circuit combine existing display when ordered pair pixel transistor carry out display driving before, i.e., opened in scanning signal Gate In the first segment time before opening, pressure stabilizing sub-circuit is pre-charged by precharging signal CH, first after being allowed to precharge Voltage value V1No more than its threshold voltage Vth, pressure stabilizing sub-circuit, which is charged and charged, in unlatching scanning signal Gate in this way reaches To the voltage value V of control pixel transistor tube currentdata, it is by the first voltage value V1(V1Less than or equal to Vth) it is charged to Vdata, and It is non-that V is charged to by 0Vdata, can largely reduce pressure stabilizing sub-circuit display the charging stage charging time, therefore, The scope of application using the pixel-driving circuit and its pixel transistor of driving is wider, can be applied to high-resolution and high brush In the display panel of new frequency.
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 pixel-driving circuit in existing display panel；
Fig. 2 is a kind of structural schematic diagram of pixel-driving circuit provided in an embodiment of the present invention；
Fig. 3 show a kind of schematic diagram for showing timing in display panel；
Fig. 4 for using the embodiment of the present invention provide pixel-driving circuit drive display panel a kind of display timing signal Figure；
Fig. 5 is the structural schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention；
Fig. 8 drives the another of display panel to show showing for timing to provide pixel-driving circuit using the embodiment of the present invention It is intended to；
Fig. 9 is a kind of flow chart of the driving method of pixel-driving circuit provided in an embodiment of the present invention；
Figure 10 is the flow chart of the driving method of another pixel-driving circuit provided in an embodiment of the present invention；
Figure 11 is a kind of structural schematic diagram of display panel 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 pixel-driving circuit in existing display panel.As shown in Figure 1, the pixel driver Circuit is, for example, the pixel-driving circuit in Micro LED panel, the pixel-driving circuit include transistor T1, capacitor C1, as Element driving transistor DTFT and lighting transistor D1, which is, for example, a Micro LED crystal pipe, wherein T1 and DTFT are for example For N-type metal-oxide semiconductor (MOS) (N-Metal-Oxide-Semiconductor, referred to as are as follows: NMOS) transistor, the grid of T1 The scan line for connecting display panel, for accessing scanning signal Gate, the data line of drain electrode connection display panel, for accessing number It is believed that number Data, the anode of source electrode connection capacitor C1 arranged side by side and the grid of DTFT, the source electrode of the cathode of capacitor C1 and DTFT are simultaneously Column are connected to common voltage VSS, common voltage VSSA for example, low-voltage, the drain electrode of DTFT are connected to lighting transistor D1 Cathode, the anode of lighting transistor D1 is connected to supply voltage VDD, the VDDA for example, high voltage.
The working principle of pixel-driving circuit in existing display panel shown in Fig. 1 are as follows: after scanning signal Gate unlatching, number It is believed that number Data charges to capacitor C1, the cut-in voltage V of DTFT is charged to from 0 volt (V)th, at this point, DTFT is opened and can point Bright D1, capacitor C1 continue to charge, from VthIt is charged to voltage value (the i.e. V of data-signaldata), the VdataFor DTFT opening degree Specific voltage；Scanning signal Gate is closed, and capacitor C1 pressure stabilizing is VdataUntil current frame end.Due to the display of Micro LED Brightness is related to electric current, and electric current is related to DTFT opening degree, therefore, by controlling DTFT opening degree, i.e. control Vdata Size can control the display brightness of Micro LED.However, being charged to for pixel-driving circuit shown in Fig. 1 to capacitor C1 It opens DTFT and continues to be charged to by the electric current of DTFT control Micro LED (i.e. D1), V need to be charged to from 0V to capacitor C1data, And charging current is usually smaller, in this way, the charging time of capacitor C1 can be made longer, so that the pixel-driving circuit is suitable It is poor with range, it is not suitable for the display panel of high-resolution and high refreshing frequency.
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. 2 is a kind of structural schematic diagram of pixel-driving circuit provided in an embodiment of the present invention.Picture provided in this embodiment Plain driving circuit 100 may include: charging sub-circuit 110 and pressure stabilizing sub-circuit 120.
In the pixel-driving circuit 100 of the embodiment of the present invention, precharging signal end P in parallelCHWith scanning signal end PGate It is electrically connected respectively with the first input end 110a of charging sub-circuit 110, the second input terminal 110b and number of the charging sub-circuit 110 According to signal end PDataElectrical connection, output end 110c are connected with the first input end 120a of pressure stabilizing sub-circuit 120.Above-mentioned pixel is driven Scanning signal end P in dynamic circuit 100GateFor exporting scanning signal Gate, scanning signal Gate can be display panel The signal that middle control pixel transistor 130 is opened, above-mentioned precharging signal end PCHFor exporting precharging signal CH, and it is above-mentioned simultaneously The precharging signal end P of connectionCHWith scanning signal end PGateOutput scanning signal Gate or precharging signal CH for timesharing；Separately Outside, data signal end P in above-mentioned pixel-driving circuit 100DataFor outputting data signals, and in pixel-driving circuit 100 The voltage value of the different time sections of work, the data-signal of output can be different.
In addition, the second input terminal 120b of pressure stabilizing sub-circuit 120 passes through pixel transistor 130 and electricity in the embodiment of the present invention Source voltage VDDElectrical connection, output end 120c and common voltage VSSElectrical connection.
Based on the structure of pixel-driving circuit 100 shown in Fig. 2, pixel-driving circuit 100 in the embodiment of the present invention is used for The charging sub-circuit 110 is connected by the precharging signal CH of the first input end 110a input for the sub-circuit 110 that charges, and passes through Be connected charging sub-circuit 110 the second input terminal 110b input the first data-signal Data1 to pressure stabilizing sub-circuit 120 into Line precharge, the first voltage value V of the first input end 120a of the pressure stabilizing sub-circuit 120 after precharge1Less than or equal to being used for The threshold voltage V of the pressure stabilizing sub-circuit 120 is connectedth.In the embodiment of the present invention, in charging sub-circuit 110 by passing through preliminary filling telecommunications Number end PCHWhen the precharging signal CH conducting of input, data signal end PDataThe effect of the first data-signal Data1 of output is Pressure stabilizing sub-circuit 120 is pre-charged, pixel-driving circuit 100 is required to be not turned on pressure stabilizing sub-circuit under the working condition 120。
With reference to Fig. 2 as can be seen that in pixel-driving circuit provided in an embodiment of the present invention 100, the first of electronic circuit 110 Input terminal 110a is not only connected electrically to scanning signal end PGate, it is also connected electrically to and scanning signal end PGatePrecharge in parallel Signal end PCH, i.e., scanning signal Gate can not only be inputted by the first input end 110a of charging sub-circuit 110, it can be with defeated Enter precharging signal CH, and above-mentioned two signal end (Gate and CH) passes through the first input end 110a of the charging sub-circuit 110 The signal of input does not input simultaneously, but timesharing input.In practical applications, first input end 110a can distinguish It is connected with the scan line of display panel and precharging signal line, in addition, in the pixel-driving circuit 100, by pressure stabilizing The voltage swing (i.e. the voltage of N1 point) that circuit 120 charges controls the display brightness of pixel transistor 130, i.e. control should The electric current of pixel transistor 130.
Pixel-driving circuit 100 as shown in Figure 2, since its first input end 110a for charging sub-circuit 110 can be inputted Precharging signal CH, and charging modes may include two stages, i.e. pre-charging stage and the charging stage for normally showing (hereinafter referred to as: the display charging stage), wherein the working principle of pre-charging stage are as follows: in precharge time period t1, by preliminary filling Electric signal CH is drawn high, and with conducting charging sub-circuit 110, and is inputted the first data-signal Data1 by the second input terminal 110b, is given Pressure stabilizing sub-circuit 120 charges, and since the pre-charging stage pixel transistor 130 not can be lit, the precharge rank can be set The voltage value of the first data-signal Data1 inputted in section is less than or equal to threshold voltage Vth, that is, pressure stabilizing electricity after being pre-charged The first voltage value V on road 1201Again smaller than or equal to threshold voltage Vth, 100 interior joint N1's of pixel-driving circuit as shown in Figure 2 Voltage value, V (N1) are V1。
It is driven using pixel transistor 130 of the pixel-driving circuit 100 provided in an embodiment of the present invention to display panel When dynamic, in a period of time before pixel transistor 130 is lighted in each frame, the preliminary filling of above-mentioned pre-charging stage can be executed Electric treatment, in this way, precharge complete after pressure stabilizing sub-circuit 120 the first voltage value V1It can achieve or electric close to its threshold value Press Vth, in this way, the requirement to the pressure stabilizing sub-circuit 120 charging is then, from V after opening the display charging stage1It is charged to Vdata, it is thus evident that be added pre-charging stage after, control 130 electric current of pixel transistor principle are as follows: to pressure stabilizing sub-circuit 120 into Row charging, and charging modes are from V1It is charged to Vdata, compared in the pixel-driving circuit of existing display panel shown in Fig. 1, control The principle of lighting transistor D1 electric current processed are as follows: charge to capacitor C1, and charging modes are to be charged to V from 0Vdata；The present invention The pixel-driving circuit 100 that embodiment provides can be substantially reduced what the display charging stage charged to pressure stabilizing sub-circuit 120 Voltage quantities, it can be seen that the display charging stage needs the voltage quantities to charge to reduce V1, in this way, can be largely The upper charging time for reducing pressure stabilizing sub-circuit 120.
Fig. 3 show a kind of schematic diagram for showing timing in display panel, is used for scanning element transistor in display panel Timing generally include: frame start signal (Start Vertical, referred to as are as follows: STV), frame end signal (Reset, referred to as are as follows: RST), scanning signal Gate and data-signal Data, and Fig. 3 illustrates charging modes to the shadow of circuit interior joint N1 voltage value It rings.Wherein, RST is drawn high when every frame end, while Gate is drawn high, and is discharged the pixel transistor in display panel, electric discharge After RST drag down, start next frame after a certain period of time, STV, which is drawn high, indicates that present frame has turned on, and STV draws high preset time period After drag down, then begin to open pixel transistor by Gate, wherein the period and STV that STV is drawn high draw high Gate Period between drawing high can be that the pre- software that first passes through is arranged.The pixel-driving circuit of existing display panel shown in Fig. 1 In, it is only charged by scanning signal Gate to capacitor C1 and opens the DTFT for controlling D1 electric current, therefore, entire pixel The opening time of driving circuit be also since at the time of Gate is raised, i.e., since Fig. 3 at the time of dotted line to capacitor C1 charging, and charge from 0V to VdataWhen just can control the electric current of lighting transistor D1, the charging time is longer, occupies in a frame Time it is also longer, be not suitable for the display panel of high-resolution and high refreshing frequency.
Fig. 4 for using the embodiment of the present invention provide pixel-driving circuit drive display panel a kind of display timing signal Figure shows shown in Fig. 4 and uses pixel-driving circuit 100 provided in an embodiment of the present invention in timing, and combines existing display panel In display timing, equally illustrate frame start signal STV, frame end signal RST, scanning signal Gate and data in Fig. 4 Signal Data, and illustrate influence of the charging modes of pixel-driving circuit 100 to circuit interior joint N1 voltage value.Due to Pixel-driving circuit 100 in the embodiment of the present invention joined pre-charging functions, it can before scanning signal Gate is drawn high, lead to It crosses precharging signal and certain voltage value (i.e. the first voltage value V is charged to pressure stabilizing sub-circuit 120 in advance1), in conjunction in Fig. 3 It shows timing, after that is, every frame electric discharge, can start to pressure stabilizing opened for next frame after the RST of every frame is dragged down Circuit 120 is pre-charged, such as after a bit of time for dragging down of RST of former frame, precharging signal CH is drawn high, with conducting Charge sub-circuit 110, and inputs the first data-signal Data1 by the second input terminal 110b, i.e., fills to pressure stabilizing sub-circuit 120 Electricity, be charged to present frame STV drag down after terminate pre-charge process, such as be arranged the first data-signal Data1 voltage value it is small In or equal to threshold voltage Vth, that is, the first voltage value V of the pressure stabilizing sub-circuit 120 after being pre-charged1Again smaller than or equal to threshold value electricity Press Vth, above-mentioned precharge time period is t1；After precharge, i.e. STV and CH may exist before drawing high after dragging down to Gate The a bit of time, the time period t ' in, precharging signal CH is dragged down, and charging sub-circuit 110 disconnects, and the second input terminal 110b is not defeated Enter data-signal；Then, after Gate is drawn high, start to carry out display charging.
Pixel-driving circuit 100 provided in an embodiment of the present invention is used shown in existing display timing and Fig. 4 shown in comparison diagram 3 The display timing that is driven it can be seen that
First, using pixel-driving circuit 100 provided in an embodiment of the present invention, before Gate unlatching, pressure stabilizing sub-circuit 120 Voltage value (voltage value for being equal to Fig. 4 interior joint N1) have reached V1, and the V1Less than or equal to threshold voltage Vth, will not Pressure stabilizing sub-circuit 120 is connected, i.e., will not open pixel transistor 130；
After second, Gate are opened, it is to 120 charging modes of pressure stabilizing sub-circuit, from V1It is charged to VdataIt can reach control picture The electric current of cellulose crystal pipe 130 may refer to the voltage value of N1 in Fig. 3 and Fig. 4, and N1 is 0V, figure at the time of Gate is drawn high in Fig. 3 N1 is V at the time of Gate is drawn high in 41, N1 reaches V from 0VdataTime be significantly greater than N1 from V1Reach VdataTime；
Third is pre-charged, using in existing display panel using the pixel-driving circuit 100 that inventive embodiments provide Display timing, when frame open before begin to be pre-charged, do not need occupy present frame effective display time, by right Precharge time makes rational planning for, and the pixel-driving circuit 100 and pixel transistor 130 can be applied to high-resolution and height In the display panel of refreshing frequency.
Pixel-driving circuit 100 provided in an embodiment of the present invention, including charging sub-circuit 110 and pressure stabilizing sub-circuit 120, and The precharging signal end P of connectionCHWith scanning signal end PGateIt is electrically connected respectively with the first input end 110a of charging sub-circuit 110, The the second input terminal 110b and data signal end P of the charging sub-circuit 110DataElectrical connection, output end 110c and pressure stabilizing sub-circuit 120 first input end 120a electrical connection, the second input terminal 120b of the pressure stabilizing sub-circuit 120 by pixel transistor 130 with Supply voltage VDDElectrical connection, output end 120c and common voltage VSSElectrical connection, the pixel-driving circuit 100 of above structure can be with The charging sub-circuit 110 is connected by the precharging signal CH of the first input end 110a input for the sub-circuit 110 that charges, and passes through Be connected charging sub-circuit 110 the second input terminal 110b input the first data-signal Data1 to pressure stabilizing sub-circuit 120 into Line precharge, the first voltage value V of the first input end 120a of the pressure stabilizing sub-circuit 120 after precharge1Less than or equal to being used for The threshold voltage V of the pressure stabilizing sub-circuit 120 is connectedth；It is combined using pixel-driving circuit 100 provided in an embodiment of the present invention existing Before ordered pair pixel transistor 130 carries out display driving when display, i.e., within the first segment time before scanning signal Gate unlatching, Pressure stabilizing sub-circuit 120 is pre-charged by precharging signal CH, the first voltage value V after being allowed to precharge1No more than it Threshold voltage Vth, being charged and charged to pressure stabilizing sub-circuit 120 in unlatching scanning signal Gate in this way reaches control pixel crystalline substance The voltage value V of 130 electric current of body pipedata, it is by the first voltage value V1(V1Less than or equal to Vth) it is charged to Vdata, rather than filled by 0V Electricity arrives Vdata, pressure stabilizing sub-circuit 120 can be largely reduced in the charging time of display charging stage, therefore, used The scope of application of the pixel-driving circuit 100 and its pixel transistor 130 of driving is wider, can be applied to high-resolution and height In the display panel of refreshing frequency.
The above embodiment of the present invention has been described above pixel-driving circuit 100 in the working method of pre-charging stage.Actually answer In, above-mentioned pixel-driving circuit 100 provided in an embodiment of the present invention is also used to the first input by the sub-circuit 110 that charges The charging sub-circuit 110 is connected in the scanning signal Gate of end 110a input, and passes through the second of the charging sub-circuit 110 be connected Second data-signal Data2 of input terminal 110b input carries out display charging to pressure stabilizing sub-circuit 120, pressure stabilizing son electricity is connected Pixel transistor 130 is simultaneously opened in road 120, the first input end 110a of pressure stabilizing sub-circuit 120 after which opens Second voltage value is equal to the voltage value of the second data-signal Data2, and the voltage value of second data-signal Data2 is to control picture The voltage value V of 130 electric current of cellulose crystal pipedata.In the embodiment of the present invention, in charging sub-circuit 110 by passing through scanning signal end PGate When the scanning signal Gate conducting of input, data signal end PDataThe effect of second data-signal Data2 of output controls pixel The brightness that transistor 130 is opened requires pixel-driving circuit 100 that pressure stabilizing sub-circuit 120 is connected and is lighted under the working condition Pixel transistor 130.
It is work of the pixel-driving circuit 100 in the display charging stage above by the process that scanning signal Gate charges Make process, the working principle of the display charging stage are as follows: in display charging time section t2, scanning signal Gate is drawn high, with Pressure stabilizing sub-circuit 120 is connected by the second data-signal Data2 of the second input terminal 110b input in conducting charging sub-circuit 110, If the voltage value V of second data-signal Data2dataGreater than Vth, then pressure stabilizing sub-circuit 120 is from V1It is charged to Vdata, compared to existing There is in driving circuit DTFT be charged to V from 0Vdata, the charging time has largely been saved, if VdataLess than Vth, then will not lead Logical pressure stabilizing sub-circuit 120.
In practical application, pressure stabilizing sub-circuit 120 is charged to the voltage value V for controlling 130 electric current of pixel transistordata Afterwards, pressure stabilizing is V in the period that pixel transistor 130 is lighted in a frame timedata(Vdata>Vth), 130 points of pixel transistor The period closed after bright, then pressure stabilizing was V1To a frame end.RST is drawn high after one frame end, and pressure stabilizing sub-circuit 120 discharges into 0V Afterwards, RST is dragged down again, the pre-charge process of later on next frame, and the above-mentioned precharge of iterative cycles, display charging, pressure stabilizing are arrived Discharge process after one frame end and a frame end.
Optionally, Fig. 5 is the structural schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention.The present invention is real In the pixel-driving circuit 100 for applying example offer, charging sub-circuit 110 may include: the first NMOS transistor 111, this first The grid G of NMOS transistor 1111It is electrically connected to the first input end 110a of charging sub-circuit 110, drain D1It is electrically connected to charging Second input terminal 110b of sub-circuit 110, source S1It is electrically connected to the output end 110c of charging sub-circuit 110.
In the charging sub-circuit 110 of structure shown in Fig. 5, the grid G of the first NMOS transistor 111 can be passed through1Respectively with Precharging signal end P in parallelCHWith scanning signal end PGateElectrical connection, and pass through above-mentioned two parallel connection port (PCHAnd PGate) The precharging signal CH and scanning signal Gate that timesharing is opened to timesharing output, control leading for first NMOS transistor 111 Logical and closing, when its grid G1When with high level signal, for example, precharging signal CH or scanning signal Gate draw high this When the cut-in voltage of the first NMOS transistor 111, first NMOS transistor 111 conducting, at this point, drain D1The data of electrical connection Data-signal on line can be charged by the first NMOS transistor 111 to pressure stabilizing sub-circuit 120.
Optionally, in pixel-driving circuit 100 provided in an embodiment of the present invention, pressure stabilizing sub-circuit 120 may include: pressure stabilizing Capacitor 121 and pixel driven transistor 122, the pixel driven transistor 122 for example can be a NMOS transistor, electric capacity of voltage regulation 122 anode and the grid G of pixel driven transistor 122DThe output end 110c for being electrically connected to charging sub-circuit 110 arranged side by side, The cathode of electric capacity of voltage regulation 121 and the source S of pixel driven transistor 122DArranged side by side is electrically connected to common voltage VSS, pixel driver The drain D of transistor 122DIt is electrically connected to the cathode of pixel transistor 130, the anode of pixel transistor 130 is electrically connected to power supply Voltage VDD。
In the structure of above-mentioned pressure stabilizing sub-circuit 120, the cut-in voltage of pixel driven transistor 122 is pressure stabilizing sub-circuit Threshold voltage Vth, when pressure stabilizing sub-circuit 120 (namely electric capacity of voltage regulation 121) is charged to greater than threshold voltage VthWhen, pixel driver Transistor 122 is opened, drain DDWith source SDConducting, to open pixel transistor 130 connected to it, the pixel transistor The electric current (i.e. display brightness) of pipe 130 is controlled by the opening degree of pixel driven transistor 122, in addition, pixel driven transistor 122 opening degree by pressure stabilizing sub-circuit 120 voltage of voltage regulation VdataControl.Therefore, by controlling the second data-signal Data2 Voltage value VdataIt can control the display brightness of pixel transistor 130.
In the above embodiment of the present invention, due to pixel-driving circuit 100 pre-charging stage combine existing display timing into Row configuration, pixel transistor 130 will not be opened in pre-charging stage, that is, shown and required the pixel transistor 130 aobvious in timing Show that the charging stage (i.e. after unlatching Gate) is lit.
It in an implementation of the embodiment of the present invention, can be in control pre-charging stage, by controlling to pressure stabilizing The voltage value for the first data-signal Data1 that circuit 120 charges is less than or equal to above-mentioned the first voltage value V1, can be realized Pixel transistor 130 will not be opened in pre-charging stage, due to the first voltage value V1Less than or equal to threshold voltage Vth, therefore it is pre- The voltage value of charging stage pressure stabilizing sub-circuit 120 is not more than threshold voltage Vth。
In another implementation of the embodiment of the present invention, the first data to charge to pressure stabilizing sub-circuit 120 are believed The voltage value of number Data1 can also be greater than above-mentioned the first voltage value V1, since the charging of pressure stabilizing sub-circuit 120 reaches V1Need one The fixed time can control the length of the time period t 1 of pre-charging stage by the charging time of calculating pressure stabilizing sub-circuit 120, The duration drawn high by the way that precharging signal CH is arranged, to control pressure stabilizing sub-circuit 120 in the first electricity of pre-charging stage Pressure value V1.In this implementation, due to the voltage value for the first data-signal that pressure stabilizing sub-circuit 120 is pre-charged compared with Greatly, which reaches V to the charging of pressure stabilizing sub-circuit 1201Time it is also relatively small, such as, it is desirable that pressure stabilizing sub-circuit 120 complete The first voltage value after precharge is less than or equal to threshold voltage Vth, set VthFor 5V, use voltage value for the of 5V or 10V One data-signal is pre-charged pressure stabilizing sub-circuit 120, and the first data-signal of 10V is charged to 5V to pressure stabilizing sub-circuit 120 The required charging time is significantly smaller.The implementation can further compress the time being pre-charged in every frame, improve display The resolution ratio and refresh rate of panel, still, if the setting of pre-charging stage charging time is slightly long, it is likely that cause be pre-charged The risk that stage pixel transistor 130 is turned on.
Optionally, Fig. 6 is the structural schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention.The present invention is real In the pixel-driving circuit 100 for applying example offer, when the voltage value of above-mentioned first data-signal is greater than the first voltage value V1When, in order to It avoids being arranged unreasonable due to precharge time and pixel transistor 130 being caused to be switched in pre-charging stage, pixel shown in Fig. 6 Driving circuit 100 can also include:
It is connected to the first input end 120a of pressure stabilizing sub-circuit 120 and the grid G of pixel driven transistor 122DBetween Switch sub-circuit 140, the first input end 140a of the switch sub-circuit 140 and the reference signal end electricity for exporting reference signal Connection, the second input terminal 140b are electrically connected to the first input end 120a of pressure stabilizing sub-circuit, and output end 140c is electrically connected to pixel Drive the grid G of transistor 122D。
Based on the structure of pixel-driving circuit 100 shown in Fig. 6, pixel-driving circuit 100 provided in an embodiment of the present invention, also For disconnecting the switch sub-circuit 140 when reference signal indicates that charging sub-circuit 110 is connected by precharging signal CH, referring to Signal designation charges when sub-circuit 110 is connected by scanning signal Gate and switch sub-circuit 140 is connected.
In embodiments of the present invention, reference signal can indicate the currently conducting charging sub-circuit 110 of pixel-driving circuit 100 Input signal be precharging signal CH or scanning signal Gate, if current conducting is charged, the input signal of sub-circuit 110 is Precharging signal CH, when being pre-charged in order to avoid the first data-signal to pressure stabilizing sub-circuit 120, charging is so that pressure stabilizing son electricity The voltage value on road 120 is greater than Vth, which can disconnect above-mentioned switch sub-circuit 140 by reference to the instruction of signal, In this way, the pixel driven transistor 122 in pressure stabilizing sub-circuit 120 will not be then switched on, therefore, pixel transistor 130 will not It is turned on.
Optionally, Fig. 7 is the structural schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention.In Fig. 6 institute In the structure basis for showing pixel-driving circuit 100, the switch sub-circuit 140 in the embodiment of the present invention may include: p-type metal oxygen Compound semiconductor (P-Metal-Oxide-Semiconductor, referred to as are as follows: PMOS) transistor 141 and the second NMOS transistor 142, the grid G of the PMOS transistor 141PIt is electrically connected to the first input end 140a of switch sub-circuit 140, source SPElectrical connection To supply voltage VDD, drain DPWith the grid G of the 2nd NMOS1412Electrical connection, the drain D of the 2nd NMOS2It is electrically connected to switch Second input terminal 140b of sub-circuit 140, source S2It is electrically connected to the output end 140c of switch sub-circuit 140, i.e. source S2With picture The grid G of element driving transistor 122DElectrical connection.
Based on the structure of pixel-driving circuit 100 shown in Fig. 7, pixel-driving circuit 100 provided in an embodiment of the present invention, also For providing high level to reference signal to disconnect PMOS transistor 141 after charging sub-circuit is connected in precharging signal CH Low level is provided to reference signal when scanning electric signal Gate conducting charging sub-circuit 110 with the second NMOS transistor 142 PMOS transistor 141 and the second NMOS transistor 142 is connected.
In pixel-driving circuit 100 provided in an embodiment of the present invention, the first input end 140a access of switch sub-circuit 140 Reference signal be, for example, frame start signal STV in display timing shown in Fig. 3 and Fig. 4, i.e. reference signal end can be PSTV, According to the time section of the high level of reference signal STV and low level variation pre-charging stage and display charging stage It sets.As shown in figure 8, driving the another kind of display panel to show timing to provide pixel-driving circuit using the embodiment of the present invention The voltage value of 100 interior joint N2 of pixel-driving circuit is added in schematic diagram, display timing shown in Fig. 8 on the basis of fig. 4.Using figure Pixel-driving circuit 100 shown in 7 drives the timing of pixel transistor 130 can be with are as follows:
T1: one frame of pre-charging stage start before (before i.e. STV is raised), and former frame electric discharge terminate after (i.e. RST After dragging down), pre-charging stage is opened, the t1 within the period of precharge, STV are drawn high so that PMOS transistor 141 and second NMOS transistor 142 disconnects, and such electric current can not reach the node N2 in circuit 100 shown in Fig. 7, it can be seen that N1 when Between be increased to V from 0V in section1, N2 is always 0V in t1, i.e. pixel driven transistor 122 is not turned in t1, will not be opened Open pixel transistor 130；
Time period t ': it is usually arranged as in display timing, after the frame start signal of a frame drags down, is scanned to first Before signal Gate is drawn high, there is a period t', wherein duration that STV is drawn high, time period t ' length can lead to Cross software configuration, it is desirable that terminate pre-charge process before scanning signal Gate is opened；STV is pulled low i.e. expression pre-charging stage knot Beam, STV is dragged down so that PMOS transistor 141 and the second NMOS transistor 142 are both turned on, time period t ' in, precharging signal CH It dragging down, the first NMOS transistor 111 is closed, and charging sub-circuit 110 disconnects, the time period t ' in, PMOS transistor 141 and second NMOS transistor 142 is constantly on state, and V (N1)=V (N2)=V1, and V1Less than or equal to Vth；
Show charging stage t2: scanning signal Gate is drawn high, and the first NMOS transistor 111, the second data-signal is connected Data2 passes through first NMOS transistor 111, and switch on pixel drives transistor 122, and second data-signal Data2 Voltage value is the voltage value V for controlling 122 opening degree of pixel driven transistordataIf the voltage of second data-signal Data2 Value VdataGreater than Vth, then pressure stabilizing sub-circuit 120 is from V1It is charged to Vdata, it is charged to compared to DTFT in existing driving circuit from 0V Vdata, the charging time has largely been saved, if VdataLess than Vth, then pixel driven transistor 122 is not turned on；
The pressure stabilizing stage: after t2 terminates, the period that pixel transistor 130 is lighted in a frame time of electric capacity of voltage regulation 121 Interior pressure stabilizing is Vdata(Vdata>Vth), remaining period, that is, the non-lit up period of pixel transistor 130, electric capacity of voltage regulation after scanning 121 in VdataWithout output (the i.e. voltage V of the second data-signal Data2dataIt is V that voltage value is kept in the case where for 0V)1To a frame Terminate.RST is drawn high after one frame end, and after electric capacity of voltage regulation 121 discharges into 0V, RST is dragged down again, the preliminary filling of later on next frame Electric process, the above-mentioned precharge of iterative cycles show the discharge process after charging, pressure stabilizing a to frame end and a frame end.
It should be noted that the input structure of the frame end signal RST of every frame and mode can be in various embodiments of the present invention For pixel-driving circuit 100 as shown in Figure 7 further includes third NMOS transistor 150, the leakage of the third NMOS transistor 150 Pole D3It is electrically connected a high voltage VGH, high voltage VGHFor example, 20V or more, source S3It is electrically connected to scanning signal Gate, grid Pole G3It is electrically connected to the frame end signal end P of output frame end signal RSTRST, when every frame end, by the way that RST is drawn high, It discharges every row pixel transistor 130, i.e. discharge process described in above-described embodiment, drags down RST after electric discharge, open Open the pre-charging stage of next frame.
In the pixel-driving circuit 100 that the above embodiment of the present invention provides, pixel transistor 130 can be single-point driving The pixel-driving circuit 100 is applied to display since the pixel-driving circuit 100 has the function of precharge by Micro LED In panel, the dot structure that can be charged in advance is formed, passes through the pixel driver electricity being arranged in the non-display area of display panel Road 100 charges in advance to the electric capacity of voltage regulation 121 of the pixel driven transistor 122 of control Micro LED current, to reduce aobvious Show the charging time in stage, i.e., pixel-driving circuit 100 provided in an embodiment of the present invention can be applied to high-resolution and high brush In the display panel of new frequency；Solve mistake of the pixel-driving circuit in driving Micro LED of existing Micro LED panel Cheng Zhong, since the electric capacity of voltage regulation of the DTFT grid of control Micro LED current is larger, and charging current is smaller, so that when charging Between the longer and problem that causes the applicability of existing pixel-driving circuit lower.
In practical applications, since the pixel-driving circuit 100 in various embodiments of the present invention has the function of charging in advance, By the second data-signal Data2 to 122 grid G of pixel driven transistor of control 130 electric current of pixel transistorDPressure stabilizing electricity The calculating in the charging time that pressure 121 charges is as follows:
The voltage at each moment of electric capacity of voltage regulation 121 are as follows:
Vt=V0+(V1-V0)*(1-e-t/RC) (1)
Available, the charging time of electric capacity of voltage regulation 121 according to formula (1) are as follows:
T=RC*Ln [(V1-V0)/(V1-Vt)] (2)
In above-mentioned formula (1) and formula (2), t is any moment in charging time section, VtFor after time t, electric capacity of voltage regulation Voltage value on 121, V1To complete the voltage value after charging on electric capacity of voltage regulation 121, V0 is the initial voltage of electric capacity of voltage regulation 121 Value, such as can be 0V, RC is the charging constant of electric capacity of voltage regulation 121, and RC, which refers to, removes power unit short circuit, charging circuit part (i.e. pressure stabilizing sub-circuit 120) equivalent resistance value and equivalent capacitance value, the unit of R is ohm, when the unit of C is farad, when RC Between the unit of constant be the second (s).
Furthermore, it is contemplated that electric capacity of voltage regulation 121 is charged to fully saturated required time infinity, after 3 RC, can recognize It is charged to 95% for electric capacity of voltage regulation 121, that is, thinks that electric capacity of voltage regulation 121 is full of.Therefore, it is not carried out in existing pixel-driving circuit The electric capacity of voltage regulation to charge in advance is charged to V from 0VdataPeriod and this hair embodiment pixel-driving circuit 100 in hold After row extracts charging, from V1It is charged to VdataSecond time period t2 be respectively as follows:
T ≈ the RC*Ln [(V not charged in advancedata-0)/(Vdata-0.95Vdata)]；
T2 ≈ the RC*Ln [(V to have charged in advancedata-V1)/(Vdata-0.95Vdata)]；
Therefore, it can be deduced that use pixel-driving circuit 100 provided in an embodiment of the present invention, can be saved in the display charging stage The charging time of province are as follows:
△t≈RC*Ln[Vdata/(Vdata-V1)]；
It in practical applications, can be according to the V for the RC value and specific pixel driven transistor 122 that actual circuit designsth, The pixel-driving circuit 100 is calculated in display charging stage in the diminishbb charging time, and the refresh rate that can be promoted and The specific value of resolution ratio.
Based on the pixel-driving circuit 100 that the above embodiment of the present invention provides, the embodiment of the present invention also provides a kind of pixel The driving method of driving circuit, the driving method are executed by the pixel-driving circuit 100 that any of the above-described embodiment of the present invention provides, As shown in figure 9, being a kind of flow chart of the driving method of pixel-driving circuit provided in an embodiment of the present invention, the driving method packet Include following steps:
The charging sub-circuit is connected by inputting precharging signal to charging sub-circuit in first time period in S210；
S220, the charging sub-circuit be connected are pre-charged pressure stabilizing sub-circuit by the first data-signal inputted, The first voltage value of the first input end of pressure stabilizing sub-circuit is less than or equal to the threshold for the pressure stabilizing sub-circuit to be connected after precharge Threshold voltage.
Pixel driver of the driving method provided in an embodiment of the present invention by above-mentioned Fig. 2, in any implementation shown in Fig. 5 to Fig. 7 Circuit 100 executes, the specific structure of the pixel-driving 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.In driving method provided in an embodiment of the present invention, above-mentioned Precharging signal CH in one period t1, the sequential relationship of scanning signal Gate, STV and RST and pressure stabilizing sub-circuit 120 When the voltage value of first input end 120a (i.e. circuit interior joint N1) and the relationship of above-mentioned timing are referred to display shown in Fig. 4 Sequence.
The process that driving method provided in an embodiment of the present invention executes driving has pre-charging stage, the pre-charging stage Working principle are as follows: in precharge time period (i.e. first time period t1), precharging signal CH is drawn high, is charged with conducting sub electric Road 110, and charged by the first data-signal Data1 of input to pressure stabilizing sub-circuit 120, since the pre-charging stage pixel is brilliant Body pipe 130 not can be lit, the voltage value that the first data-signal Data1 inputted in the pre-charging stage can be set be less than or Equal to threshold voltage Vth, that is, the first voltage value V of the pressure stabilizing sub-circuit 120 after being pre-charged1Again smaller than or equal to threshold voltage Vth, The voltage value of 100 midpoint N1 of pixel-driving circuit as shown in Figure 2, i.e. V (N1) are V1。
It, can when being driven using pixel transistor 130 of the driving method provided in an embodiment of the present invention to display panel In a period of time (i.e. first time period t1) before lighting with pixel transistor 130 in each frame, above-mentioned precharge is executed The preliminary filling electric treatment in stage, that is, execute above-mentioned S210~S220, in this way, after precharge is completed pressure stabilizing sub-circuit 120 the One voltage value V1It can achieve or close to its threshold voltage Vth, in this way, after opening the display charging stage, to pressure stabilizing son electricity The requirement that road 120 is charged then is, from V1It is charged to Vdata, it is thus evident that after pre-charging stage is added, 130 electricity of control pixel transistor The principle of stream are as follows: charge to pressure stabilizing sub-circuit 120, and charging modes are from V1It is charged to Vdata, existing compared to shown in Fig. 1 Have in the driving method of display panel, controls the principle of lighting transistor D1 electric current are as follows: charge to capacitor C1, and charging side Formula is to be charged to V from 0Vdata；Driving method provided in an embodiment of the present invention can be substantially reduced the display charging stage to pressure stabilizing The voltage quantities that circuit 120 charges, it can be seen that the display charging stage needs the voltage quantities to charge to reduce V1, In this way, the charging time of pressure stabilizing sub-circuit 120 can largely be reduced.
It should be noted that using driving method provided in an embodiment of the present invention to the pixel transistor 130 of display panel The difference of existing display timing shown in the display timing (as shown in Figure 4) that is driven and Fig. 3, in the above embodiment of the present invention Through being described in detail, therefore details are not described herein.
The driving method of pixel-driving circuit provided in an embodiment of the present invention is provided based on the various embodiments described above of the present invention The hardware configuration of pixel-driving circuit 100, in first time period by inputting precharging signal CH conducting to charging sub-circuit 110 The charging sub-circuit 110, and the charging sub-circuit 110 by being connected is sub to pressure stabilizing by the first data-signal Data1 of input Circuit 120 is pre-charged, the first voltage value V of the first input end 120a of the pressure stabilizing sub-circuit 120 after precharge1Be less than or Equal to the threshold voltage V for the pressure stabilizing sub-circuit 120 to be connectedth；It is combined using driving method provided in an embodiment of the present invention existing The first segment time before ordered pair pixel transistor 130 carries out display driving when having display, i.e., before scanning signal Gate unlatching It is interior, pressure stabilizing sub-circuit 120 is pre-charged by precharging signal CH, the first voltage value V after being allowed to precharge1It is not more than Its threshold voltage Vth, being charged and charged to pressure stabilizing sub-circuit 120 in unlatching scanning signal Gate in this way reaches control pixel The voltage value V of 130 electric current of transistordata, it is by the first voltage value V1(V1Less than or equal to Vth) it is charged to Vdata, rather than by 0V It is charged to Vdata, can largely reduce pressure stabilizing sub-circuit 120 and therefore be adopted in the charging time for showing the charging stage The scope of application for carrying out display driving to pixel transistor 130 with the driving method of the pixel-driving circuit is wider, can apply In the display panel of high-resolution and high refreshing frequency.
The driving method that the above embodiment of the present invention provides has been described above pixel-driving circuit 100 in the work of pre-charging stage Make mode.It further include the work side for showing the charging stage in above-mentioned driving method provided in an embodiment of the present invention in practical application Formula is as shown in Figure 10 the flow chart of the driving method of another pixel-driving circuit provided in an embodiment of the present invention, in Fig. 9 On the basis of illustrated embodiment, driving method provided in an embodiment of the present invention can also include the following steps:
The charging sub-circuit is connected by inputting scanning signal to charging sub-circuit in second time period in S230；
S240, the charging sub-circuit be connected carry out display to pressure stabilizing sub-circuit by the second data-signal inputted and fill Electricity, pressure stabilizing sub-circuit is connected and opens pixel transistor, the first input end of pressure stabilizing sub-circuit after which opens Second voltage value be equal to the second data-signal voltage value.
It in embodiments of the present invention, is pixel-driving circuit 100 above by the process that scanning signal Gate charges In the course of work of display charging stage, the working principle of the display charging stage are as follows: in display charging time section (when i.e. second Between section t2) in, scanning signal Gate is drawn high, with conducting charge sub-circuit 110, pass through the second data-signal Data2 of input Pressure stabilizing sub-circuit 120 is connected, if the voltage value V of second data-signal Data2dataGreater than Vth, then pressure stabilizing sub-circuit 120 is from V1 It is charged to Vdata, V is charged to from 0V compared to DTFT in existing driving circuitdata, the charging time has largely been saved, if VdataLess than Vth, then pressure stabilizing sub-circuit 120 is not turned on.
It should be noted that showing timing with reference to shown in Fig. 4, the first time period t1 in the embodiment of the present invention is can be with every It period between the failing edge for the frame start signal STV for arriving next frame after the frame end signal RST failing edge of one frame, needs It illustrates, for the first frame for display, above-mentioned first time period t1 can be the frame of preset time to first frame Period between the failing edge of initial signal STV, wherein first frame can be to pass through timing control (Timing Controller, referred to as are as follows: T-Con) chip is arranged, such as T-Con defeated with reference to the input setting rear end of front end input signal First frame start signal STV out, and can be shown based on first frame start signal STV setting for first frame First time period t1；Second time period t2 can be the rising edge or pre- after failing edge of the frame start signal STV of each frame If the time reaches the voltage value V of the second data-signal to the voltage value that pressure stabilizing sub-circuit 120 carries out display chargingdataBetween when Between section, it can be seen that first time period t1 terminate to second time period t2 to start between can have a period t', the period The length and STV of t' is that can be arranged by software the duration of high level.
In practical application, pressure stabilizing sub-circuit 120 is charged to for controlling pixel transistor 130 using above-mentioned driving method The voltage value V of electric currentdataAfterwards, pressure stabilizing is V in the period that pixel transistor 130 is lighted in a frame timedata(Vdata>Vth), The period that pixel transistor 130 is closed after lighting, then pressure stabilizing was V1To a frame end.RST is drawn high after one frame end, pressure stabilizing After circuit 120 discharges into 0V, RST is dragged down again, the pre-charge process of later on next frame, the above-mentioned precharge of iterative cycles, Discharge process after display charging, pressure stabilizing a to frame end and a frame end, i.e. display panel recycle during being shown Execute the process of S210~S240 and pressure stabilizing and electric discharge.
It should be noted that when the structure for the pixel-driving circuit 100 for executing driving method provided in an embodiment of the present invention When for pixel-driving circuit 100 shown in above-mentioned Fig. 5, the pixel-driving circuit 100 is in above-mentioned pre-charging stage (i.e. first time period T1 it) and shows the working method in charging stage (i.e. second time period t2), has been described in the above-described embodiments, therefore This is repeated no more.
In the above embodiment of the present invention, due to pixel-driving circuit 100 pre-charging stage combine existing display timing into Row configuration, pixel transistor 130 will not be opened in pre-charging stage, that is, shown and required the pixel transistor 130 aobvious in timing Show that the charging stage (i.e. after unlatching Gate) is lit.
In an implementation of the embodiment of the present invention, pre-charging stage (i.e. first time period t1) can be being controlled, Voltage value by controlling the first data-signal Data1 to charge to pressure stabilizing sub-circuit 120 is less than or equal to above-mentioned first voltage Value V1, pixel transistor 130 can be realized will not open in pre-charging stage, due to the first voltage value V1Less than or equal to threshold value Voltage Vth, therefore the voltage value of pre-charging stage pressure stabilizing sub-circuit 120 is not more than threshold voltage Vth。
In another implementation of the embodiment of the present invention, the first data to charge to pressure stabilizing sub-circuit 120 are believed The voltage value of number Data1 can also be greater than above-mentioned the first voltage value V1, since the charging of pressure stabilizing sub-circuit 120 reaches V1Need one The fixed time can control the length of first time period t1, i.e., by setting by the charging time of calculating pressure stabilizing sub-circuit 120 The duration that precharging signal CH is drawn high is set, to control pressure stabilizing sub-circuit 120 in the first voltage value V of pre-charging stage1.? In the implementation, since the voltage value for the first data-signal being pre-charged to pressure stabilizing sub-circuit 120 is larger, which pair The charging of pressure stabilizing sub-circuit 120 reaches V1Time it is also relatively small.The implementation can further compress preliminary filling in every frame The time of electricity, the resolution ratio and refresh rate of display panel are improved, still, if the setting of pre-charging stage charging time is slightly long, It is likely to cause the risk being turned in pre-charging stage pixel transistor 130.
It, can also be by increasing switch electricity in pixel-driving circuit 100 for risk existing for above-mentioned implementation Road 140 avoids above-mentioned risk, and in the pixel-driving circuit 100, pressure stabilizing sub-circuit 120 may include: electric capacity of voltage regulation 121 and picture Element driving transistor 122, the pixel driven transistor 122 for example can be a NMOS transistor, electric capacity of voltage regulation 122 anode and The grid G of pixel driven transistor 122DThe output end 110c for being electrically connected to charging sub-circuit 110 arranged side by side, electric capacity of voltage regulation 121 Cathode and pixel driven transistor 122 source SDArranged side by side is electrically connected to common voltage VSS, pixel driven transistor 122 Drain DDIt is electrically connected the cathode of pixel transistor 130, the anode of pixel transistor 130 is electrically connected to supply voltage VDD；In addition, should Pixel-driving circuit 100 further include: be connected to the first input end 120a and pixel driven transistor 122 of pressure stabilizing sub-circuit 120 Grid GDBetween switch sub-circuit 140, the first input end 140a of the switch sub-circuit 140 with for exporting reference signal The electrical connection of reference signal end, the second input terminal 140b is electrically connected to the first input end 120a of pressure stabilizing sub-circuit 120, output end 140c is electrically connected to the grid G of the pixel driven transistor 122 of pressure stabilizing sub-circuit 120D.Above-mentioned addition switch sub-circuit 140 Circuit structure is referred to the specific structure of pixel-driving circuit 100 shown in Fig. 6 and Fig. 7, driving method, and at first Between section t1, second time period t2 and time period t ' the course of work have been described in the above-described embodiments, therefore herein no longer It repeats.Based on the structure of above-mentioned switch sub-circuit 140, it may include walking as follows that driving method provided in an embodiment of the present invention, which is opened, It is rapid:
Switch sub-circuit 140 is disconnected by the reference signal instruction of output in first time period t1, to disconnect pressure stabilizing Circuit 120, i.e. pressure stabilizing sub-circuit 120 is always the state of disconnection in first time period t1, does not light pixel transistor 130；
In second time period t2 by the reference signal instruction conducting switch sub-circuit 140 of output, so that pressure stabilizing be connected Circuit 120, i.e. pressure stabilizing sub-circuit 120 is connected and lights pixel transistor 130 in second time period t2.
It optionally, include pre-charging stage in the driving method provided due to the various embodiments described above of the present invention (when i.e. first Between section t1), the charging time of second time period in the embodiment of the present invention are as follows:
t2≈RC*Ln[(Vdata-V1)/(Vdata-aVdata)]； (3)
Wherein, RC is the charging constant of electric capacity of voltage regulation 121, VdataIt charges for pressure stabilizing sub-circuit in second time period Target voltage values, V1It is pressure stabilizing sub-circuit in the initial voltage value of second time period, is also the pressure stabilizing sub-circuit at the first time Section completes the actual voltage value of charging, and a is the charging saturation coefficient of pressure stabilizing sub-circuit, a and VdataProduct may be considered surely Sub-circuit is pressed to complete the actual voltage value of charging, a for example can be 95%.
Driving method provided in an embodiment of the present invention, above-mentioned second time period t2 are given by the second data-signal Data2 Control 122 grid G of pixel driven transistor of 130 electric current of pixel transistorDThe charging time charged of voltage of voltage regulation 121 Calculating it is as follows:
The voltage at each moment of electric capacity of voltage regulation 121 are as follows:
Vt=V0+(V1-V0)*(1-e-t/RC) (1)
Available, the charging time of electric capacity of voltage regulation 121 according to formula (1) are as follows:
T=RC*Ln [(V1-V0)/(V1-Vt)] (2)
In above-mentioned formula (1) and formula (2), t is any moment in charging time section, VtFor after time t, electric capacity of voltage regulation Voltage value on 121, V1To complete the voltage value after charging on electric capacity of voltage regulation 121, V0 is the initial voltage of electric capacity of voltage regulation 121 Value, such as can be 0V, RC is the charging constant of electric capacity of voltage regulation 121.
Furthermore, it is contemplated that electric capacity of voltage regulation 121 is charged to fully saturated required time infinity, after 3 RC, can recognize It is charged to 95% for electric capacity of voltage regulation 121, i.e. a value in formula (3) is 95%, that is, thinks that electric capacity of voltage regulation 121 is full of.Therefore, existing It is not carried out the electric capacity of voltage regulation to charge in advance in some pixel-driving circuits, is charged to V from 0VdataPeriod and this hair it is real It applies after executing extraction charging in the pixel-driving circuit 100 of example, from V1It is charged to VdataSecond time period t2 be respectively as follows:
T ≈ the RC*Ln [(V not charged in advancedata-0)/(Vdata-0.95Vdata)]；
T2 ≈ the RC*Ln [(V to have charged in advancedata-V1)/(Vdata-0.95Vdata)]；
Therefore, it can be deduced that use driving method provided in an embodiment of the present invention, savable filled in the display charging stage The electric time are as follows:
△t≈RC*Ln[Vdata/(Vdata-V1)]；
It in practical applications, can be according to the V for the RC value and specific pixel driven transistor 122 that actual circuit designsth, The pixel-driving circuit 100 is calculated in display charging stage in the diminishbb charging time, and the refresh rate that can be promoted and The specific value of resolution ratio.
Based on the pixel-driving circuit 100 that the above embodiment of the present invention provides, the embodiment of the present invention also provides a kind of display Panel is as shown in figure 11 a kind of structural schematic diagram of display panel provided in an embodiment of the present invention.The embodiment of the present invention provides Display panel 10 may include: array setting pixel transistor 130, and any reality as shown in above-mentioned Fig. 2, Fig. 5 to Fig. 7 Apply the pixel-driving circuit 100 in example；It further include data line D and scan line G, wherein pixel transistor 130 corresponds and picture Plain driving circuit 100 is electrically connected, and the connection type of the corresponding pixel-driving circuit 100 of each pixel transistor 130 can be with Structure in any embodiment with reference to shown in above-mentioned Fig. 2, Fig. 5 to Fig. 7, wherein the pixel transistor 130 of the i-th row jth column passes through Corresponding pixel-driving circuit 100 and the i-th horizontal scanning line are coupled and are coupled with jth column data line.
N row m column pixel transistor 130 and n horizontal scanning line G1~Gn and m column are illustrated in display panel shown in Figure 11 Data line D1~Dm, it can be seen that the pixel transistor 130 of the i-th row jth column is coupled by corresponding pixel-driving circuit 100 To the i-th horizontal scanning line Gi, and it is couple to jth column data Dj.Configured with this in display panel 10 provided in an embodiment of the present invention The pixel-driving circuit 100 provided in invention above-described embodiment, the function which is realized have with what is reached Beneficial effect is same as the previously described embodiments, it can offer prestores Electricity Functional, to shorten the charging time of display charging stage, i.e., Display panel 10 provided in an embodiment of the present invention can be the display panel of high-resolution and high refresh rate.
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 pixel driver that any of the above-described embodiment of the present invention provides when being executed by processor The driving method of circuit.The embodiment and the above-mentioned implementation of the present invention of computer readable storage medium provided in an embodiment of the present invention The driving method for the pixel-driving circuit that example provides 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 (15)

1. a kind of pixel-driving circuit characterized by comprising charging sub-circuit and pressure stabilizing sub-circuit；
Precharging signal end and scanning signal end in parallel is electrically connected with the first input end of the charging sub-circuit respectively, described Second input terminal of charging sub-circuit is electrically connected with data signal end, the first input end electricity of output end and the pressure stabilizing sub-circuit Connection；
Second input terminal of the pressure stabilizing sub-circuit is electrically connected by pixel transistor with supply voltage, output end and common voltage Electrical connection；
Institute is connected in the pixel-driving circuit, the precharging signal for the first input end input by the charging sub-circuit Charging sub-circuit is stated, and the first data-signal of the second input terminal input of the charging sub-circuit by being connected is to described Pressure stabilizing sub-circuit is pre-charged, and the first voltage value of the first input end of the pressure stabilizing sub-circuit is less than or equal to after precharge For the threshold voltage of the pressure stabilizing sub-circuit to be connected.
2. pixel-driving circuit according to claim 1, which is characterized in that the charging sub-circuit includes: the first N-type gold Belong to oxide semiconductor NMOS transistor, the grid of first NMOS transistor is electrically connected to the first of the charging sub-circuit Input terminal, drain electrode are electrically connected to the second input terminal of the charging sub-circuit, and source electrode is electrically connected to the defeated of the charging sub-circuit Outlet.
3. pixel-driving circuit according to claim 1, which is characterized in that the pressure stabilizing sub-circuit includes: electric capacity of voltage regulation And pixel driven transistor, the anode of the electric capacity of voltage regulation and the grid of the pixel driven transistor it is arranged side by side be electrically connected to institute State the output end of charging sub-circuit, the electrical connection arranged side by side of the source electrode of the cathode of the electric capacity of voltage regulation and the pixel driven transistor To the common voltage, the drain electrode of the pixel driven transistor is electrically connected to the cathode of the pixel transistor, the pixel The anode of transistor is electrically connected to the supply voltage.
4. pixel-driving circuit described in any one of claim 1 to 3, which is characterized in that first data-signal Voltage value be less than or equal to the first voltage value.
5. pixel-driving circuit according to claim 3, which is characterized in that the pixel-driving circuit further include:
The switch electricity being connected between the first input end of the pressure stabilizing sub-circuit and the grid of the pixel driven transistor The first input end on road, the switch sub-circuit is electrically connected with the reference signal end for exporting reference signal, the second input terminal It is electrically connected to the first input end of the pressure stabilizing sub-circuit, output end is electrically connected to the grid of the pixel driven transistor；
The pixel-driving circuit is also used to indicate that the charging sub-circuit is led by the precharging signal in the reference signal The switch sub-circuit is disconnected when logical, is led when the reference signal indicates that the charging sub-circuit is connected by the scanning signal Lead to the switch sub-circuit.
6. pixel-driving circuit according to claim 5, which is characterized in that the switch sub-circuit includes p-type metal oxygen Compound semiconductor PMOS transistor and the second NMOS transistor, the grid of the PMOS transistor are electrically connected to the switch electricity The first input end on road, source electrode are electrically connected to the supply voltage, and drain electrode is electrically connected with the grid of the 2nd NMOS, and described the The drain electrode of two NMOS is electrically connected to the second input terminal of the switch sub-circuit, and source electrode is electrically connected to the defeated of the switch sub-circuit Outlet；
The pixel-driving circuit is also used to when the charging sub-circuit is connected in the precharging signal, to described with reference to letter Number provide high level to disconnect the PMOS transistor and second NMOS transistor, the clock electric signal conducting described in When charging sub-circuit, low level is provided so that the PMOS transistor and the 2nd NMOS crystal is connected to the reference signal Pipe.
7. pixel-driving circuit according to claim 5 or 6, which is characterized in that the voltage value of first data-signal Greater than the first voltage value.
8. a kind of driving method of pixel-driving circuit, which is characterized in that using such as according to any one of claims 1 to 7 Pixel-driving circuit executes the driving method, and the driving method includes:
The charging sub-circuit is connected by inputting precharging signal to charging sub-circuit in first time period；
The charging sub-circuit be connected is pre-charged pressure stabilizing sub-circuit by the first data-signal inputted, is pre-charged The first voltage value of the first input end of the pressure stabilizing sub-circuit is less than or equal to the threshold for the pressure stabilizing sub-circuit to be connected afterwards Threshold voltage.
9. the driving method of pixel-driving circuit according to claim 8, which is characterized in that further include:
The charging sub-circuit is connected by inputting scanning signal to the charging sub-circuit in second time period；
The charging sub-circuit be connected carries out display charging to the pressure stabilizing sub-circuit by the second data-signal inputted, The pressure stabilizing sub-circuit is connected and opens pixel transistor, the first of the pressure stabilizing sub-circuit after the pixel transistor is opened The second voltage value of input terminal is equal to the voltage value of second data-signal.
10. the driving method of pixel-driving circuit according to claim 8, which is characterized in that
The charging time of the second time period are as follows:
t2≈RC*Ln[(Vdata-V1)/(Vdata-aVdata)]；
Wherein, the RC is the charging constant of the electric capacity of voltage regulation, the VdataIt is the pressure stabilizing sub-circuit in second time The target voltage values of Duan Jinhang charging, the V1Initial voltage value for the pressure stabilizing sub-circuit in the second time period, institute State the charging saturation coefficient that a is the pressure stabilizing sub-circuit.
11. the driving method of pixel-driving circuit according to claim 8, which is characterized in that
The first time period is the decline that the failing edge of the frame end signal of each frame arrives the frame start signal of next frame later Period between, alternatively, the first time period is predetermined time between the failing edge of the frame start signal of first frame Period；
The second time period be the frame start signal of each frame rising edge or preset time after failing edge to it is described surely The voltage value that pressure sub-circuit carries out display charging reaches the period between the voltage value of second data-signal.
12. the driving method of the pixel-driving circuit according to any one of claim 8~11, which is characterized in that
The voltage value of first data-signal is less than or equal to the first voltage value in the first time period.
13. the driving method of the pixel-driving circuit according to any one of claim 8~11, which is characterized in that described Pressure stabilizing sub-circuit includes charging and voltage stabilizing capacitor and pixel driven transistor, and the anode and the pixel driver of the electric capacity of voltage regulation are brilliant The grid of the body pipe output end for being electrically connected to the charging sub-circuit arranged side by side, the cathode of the electric capacity of voltage regulation and the pixel are driven The source electrode of dynamic transistor it is arranged side by side be electrically connected to the common voltage, the drain electrode of the pixel driven transistor is electrically connected to described The cathode of pixel transistor, the anode of the pixel transistor are electrically connected to the supply voltage；Institute in the first time period The voltage value for stating the first data-signal is greater than the first voltage value, the pixel-driving circuit further include:
The switch electricity being connected between the first input end of the pressure stabilizing sub-circuit and the grid of the pixel driven transistor The first input end on road, the switch sub-circuit is electrically connected with the reference signal end for exporting reference signal, the second input terminal It is electrically connected to the first input end of the pressure stabilizing sub-circuit, output end is electrically connected to the grid of the pixel driven transistor；Institute State driving method further include:
The switch sub-circuit is disconnected by the reference signal instruction of output in the first time period, thus described in disconnecting Pressure stabilizing sub-circuit；
The switch sub-circuit is connected by the reference signal instruction of output in the second time period, thus described in conducting Pressure stabilizing sub-circuit.
14. a kind of display panel characterized by comprising the pixel transistor of array setting, and as in claim 1~7 Described in any item pixel-driving circuits；
The pixel transistor one-to-one correspondence is electrically connected with the pixel-driving circuit, wherein the pixel of the i-th row jth column Transistor is coupled by corresponding pixel-driving circuit and the coupling of the i-th horizontal scanning line and with jth column data line.
15. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has executable finger It enables, the pixel-driving circuit as described in any one of claim 8~13 is realized when the executable instruction is executed by processor Driving method.
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