CN109377944A - Pixel-driving circuit, display panel and its driving method and display device - Google Patents

Pixel-driving circuit, display panel and its driving method and display device Download PDF

Info

Publication number
CN109377944A
CN109377944A CN201811281987.3A CN201811281987A CN109377944A CN 109377944 A CN109377944 A CN 109377944A CN 201811281987 A CN201811281987 A CN 201811281987A CN 109377944 A CN109377944 A CN 109377944A
Authority
CN
China
Prior art keywords
signal
driving
circuits
transistor
signal line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201811281987.3A
Other languages
Chinese (zh)
Other versions
CN109377944B (en
Inventor
殷新社
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN201811281987.3A priority Critical patent/CN109377944B/en
Publication of CN109377944A publication Critical patent/CN109377944A/en
Application granted granted Critical
Publication of CN109377944B publication Critical patent/CN109377944B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element

Landscapes

  • 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)
  • Control Of El Displays (AREA)

Abstract

This disclosure relates to pixel-driving circuit and its driving method, display panel and its driving method and display device and its driving method.Pixel-driving circuit includes: drive sub-circuits, and the drive sub-circuits are configured under the control of scanning signal, drives the light-emitting component to shine according to the data voltage from data signal line；And reset subcircuit, the reset subcircuit are configured under the control of first control signal, utilize drive sub-circuits described in reseting signal reset；Wherein, the drive sub-circuits include driving transistor, and the drive sub-circuits are additionally configured under the control of the sensing voltage signal from data signal line, the threshold voltage of output driving transistor.Pixel-driving circuit is additionally configured to that the display data signal for utilizing threshold voltage compensation is written to data signal line；And under second control signal control, by the grid for the display data signal write driver transistor having been compensated for.

Description

Pixel-driving circuit, display panel and its driving method and display device
Technical field
This disclosure relates to field of display technology, more particularly, to a kind of pixel-driving circuit and its driving method, one kind Display panel and its driving method and a kind of display device.
Background technique
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) display is current FPD One of the hot spot of device research field.
With Thin Film Transistor-LCD (Thin Film Transistor-Liquid Crystal Display, TFT-LCD) different using stable voltage control brightness, OLED belongs to electric current driving, stable by driving transistor to provide Electric current shines to control OLED.The pixel-driving circuit of OLED display panel includes driving transistor.Locating for pixel unit When row is strobed, the switching transistor connected with driving transistor is connected, and data voltage is applied to drive via switching transistor Dynamic transistor, so that driving transistor exports electric current corresponding with data voltage to OLED display device, to drive OLED aobvious Show that device issues the light of corresponding bright.
However, with OLED display panel area increase, display show picture effect it is bad be urgently to be resolved Technical problem.
Summary of the invention
The present disclosure proposes a kind of pixel-driving circuit and its driving methods, a kind of display panel and its driving method and one Kind display device.
According to one aspect of the disclosure, a kind of pixel-driving circuit is proposed, driving light-emitting component is configured to and shines, institute Stating pixel-driving circuit includes:
Drive sub-circuits, the drive sub-circuits be connected to data signal line, provide scanning signal scan signal line and Light-emitting component, the drive sub-circuits are configured under the control of scanning signal, according to the data voltage from data signal line The light-emitting component is driven to shine；And
Reset subcircuit, the reset subcircuit, which is connected to, to be provided the reseting signal line of reset signal, provides the first control The first control signal line of signal and the drive sub-circuits, the reset subcircuit are configured to the control of first control signal Under, utilize drive sub-circuits described in reseting signal reset；
Wherein, the drive sub-circuits include driving transistor, and the drive sub-circuits are additionally configured to believe from data Under the control of the sensing voltage signal of number line, the threshold voltage of output driving transistor.
For example, the drive sub-circuits be additionally configured to it is defeated at the first node between drive sub-circuits and reset subcircuit The data including threshold voltage out comprising the driving transistor.
For example, the reset subcircuit includes the first transistor, wherein the first pole of the first transistor is connected to reset letter Number line, grid is connected to the first control signal line and the second pole is connected to drive sub-circuits at first node.
For example, the drive sub-circuits further include second transistor, third transistor and first capacitor, wherein described The grid of two-transistor is connected to scan signal line, and the first pole is connected to the data signal line, and the second pole is connected to the drive The grid of dynamic transistor；The grid of the third transistor is connected to the scan signal line, and the first pole is connected to described first Node, the second pole are connected to the first end of the light-emitting component；The drain electrode of the driving transistor is connected to offer first voltage First power supply line of signal, source electrode are connected to the first end of the light-emitting component；And the first end connection of the first capacitor To the grid of the driving transistor.
For example, the drive sub-circuits are additionally configured under the control of scanning signal, according to reference signal and data are come from The data voltage of signal wire drives the light-emitting component to shine；
The pixel-driving circuit further includes benchmark sub-circuit, is connected to and provides the second control signal of second control signal Line, the reference signal line for providing reference voltage signal and the drive sub-circuits, the benchmark sub-circuit are configured to second Under the control for controlling signal, reference voltage signal is supplied to the drive sub-circuits.
For example, the benchmark sub-circuit includes the 4th transistor, the grid of the 4th transistor is connected to second control signal Line, the first pole are connected to reference signal line, and the second pole is connected to the drive sub-circuits at first node.
For example, the second end of the light-emitting component, which is connected to, provides the second source line of second voltage signal.
According to the another aspect of the embodiment of the present disclosure, a kind of display panel is provided, comprising:
Multiple scan signal lines；
Multiple data signal lines；
Multiple sensing signal lines；And
According to multiple pixel-driving circuits of the embodiment of the present disclosure；
Wherein, the multiple sensing signal line is each attached to the drive sub-circuits of one of the multiple pixel-driving circuit First node between reset subcircuit.
For example, including display area and non-display area according to the display panel of the embodiment of the present disclosure；The wherein driving Sub-circuit is arranged in display area, and the reset subcircuit and benchmark sub-circuit are arranged in non-display area.
According to the another aspect of the embodiment of the present disclosure, a kind of display device, including drive integrated circult IC and root are provided According to the display panel of the embodiment of the present disclosure.
According to the another aspect of the embodiment of the present disclosure, a kind of image element driving method is provided, is applied to according to disclosure reality The pixel-driving circuit of example is applied, the image element driving method includes:
In the first period, under the control of first control signal, reset drive sub-circuits using reset signal；It is scanning Under the control of signal, by the grid of sensing voltage signal write driver transistor；
In the second period, under the control of scanning signal, the threshold voltage value of stable driving transistor is established, wherein driving The source potential of dynamic transistor and the difference of the sensing voltage signal are the threshold voltage value of the driving transistor；And
In the third period, the source potential of driving transistor is read, and driving crystal is obtained according to the source potential of reading The threshold voltage value of pipe.
For example, applying sensing voltage signal to the data signal line in the first period to third period.
According to the image element driving method of the embodiment of the present disclosure, further includes: in the 4th period, be written to the data signal line The display data signal compensated using the threshold voltage value of acquisition；Under second control signal control, the display number that will have been compensated for It is believed that reference voltage signal, is written the source electrode of the driving transistor by the grid of number write-in driving transistor.
For example, the scanning signal is to make the second crystal in the first period, the second period, third period and the 4th period The significant level of pipe and third transistor conducting.
For example, Vreset < (Vsen-Vth) < (Voled+V2), wherein Vreset is the voltage of reset signal, Vsen For the voltage of sensing voltage signal, Voled is the lasing threshold voltage of the light-emitting component, and V2 is the electricity of second voltage signal Pressure.
According to the another aspect of the embodiment of the present disclosure, a kind of driving method of display panel is provided, is applied to according to this The display panel of open embodiment, the driving method include:
For multiframe show picture in an at least frame show picture so that in the multiple scan signal line at least The connected pixel-driving circuit of one scan signal line executes the driving method according to the embodiment of the present disclosure.
For example, the duration for being applied to the significant level of the scanning signal of at least one scan signal line is to apply A times of the duration of the significant level of the scanning signal of remaining scan signal line into the multiple scan signal line, A are big In 2 integer.
For example, changing the scanning signal of corresponding scan signal line by the width for the clock signal for changing scan signal line Significant level duration.
For example, an at least frame shows that picture and former frame or a later frame show that the interval time between picture is set For at least (A-1) times of the duration of the significant level of the scanning signal of remaining scan signal line.
According to the another aspect of the embodiment of the present disclosure, a kind of driving method of display device, the display device are provided Including display panel and drive integrated circult IC；
The display panel includes multiple scan signal lines；Multiple data signal lines；Multiple sensing signal lines；And it is multiple Pixel-driving circuit；
Wherein, each of multiple pixel-driving circuits include drive sub-circuits, and the drive sub-circuits are connected to institute State one in multiple data signal lines, one and light-emitting component in the multiple scan signal line, the drive sub-circuits It is configured under the control from the scanning signal of connected scan signal line, according to the data from connected data signal line Voltage drives the light-emitting component to shine；And reset subcircuit, the reset subcircuit, which is connected to, provides answering for reset signal Position signal wire, the first control signal line of offer first control signal and the drive sub-circuits, the reset subcircuit are matched It is set under the control of first control signal, utilizes drive sub-circuits described in reseting signal reset；Wherein, the drive sub-circuits packet Driving transistor is included, the drive sub-circuits are additionally configured to the control in the sensing voltage signal from connected data signal line Under, threshold value electricity of the output comprising driving transistor at the first node between the drive sub-circuits and the reset subcircuit It is pressed in interior data；
Wherein, one in the multiple sensing signal line is connected to the first node；
The driving method includes:
The driving IC via data signal line applies sensing voltage signal to connected pixel-driving circuit and via sweeping It retouches signal wire and applies scanning signal to the connected pixel-driving circuit；
The driving IC obtains the threshold of the driving transistor in the connected pixel-driving circuit via sensing signal line Threshold voltage value；And
It is described driving IC using obtain threshold voltage value compensation display data signal and via the data signal line to The compensated display data signal is written in the connected pixel-driving circuit；
Wherein, the driving IC is changed described by changing the pulse width of the clock signal for generating scanning signal The duration of the significant level of scanning signal.
According to the technical solution of open embodiment, a kind of pixel-driving circuit structure is provided, external compensation is able to use Method dynamically reads the electrical parameter of driving transistor in real time.The electrical parameter of driving transistor floats during display When shifting, offset can be changed in time, so as to improve the quality of display picture.In addition, according to the technical side of the embodiment of the present disclosure Case can reduce pixel-driving circuit in the display area of display panel while the electrical parameter of compensation driving transistor The area of occupancy, the situation limited suitable for the display area of display panel.
Detailed description of the invention
By illustrating the embodiment of the present disclosure with reference to the accompanying drawing, above and other purpose, the spy of the embodiment of the present disclosure will be made Advantage of seeking peace is clearer.It should be noted that running through attached drawing, identical element is indicated by same or similar appended drawing reference.In figure:
Fig. 1 shows a kind of structural schematic diagram of pixel-driving circuit；
Fig. 2 shows the operation timing of the pixel-driving circuit in Fig. 1 figures；
Fig. 3 A shows a kind of example block diagram of the pixel-driving circuit according to the embodiment of the present disclosure；
Fig. 3 B shows another example block diagram of the pixel-driving circuit according to the embodiment of the present disclosure
Fig. 4 A shows the circuit diagram of the pixel-driving circuit according to another embodiment of the disclosure；
Fig. 4 B shows another circuit diagram of the pixel-driving circuit according to the embodiment of the present disclosure；
Fig. 5 shows the flow chart of the driving method of the pixel-driving circuit according to the embodiment of the present disclosure；
Fig. 6 A shows the driver' s timing figure according to the pixel-driving circuit of the embodiment of the present disclosure；
Fig. 6 B shows the potential change schematic diagram of each node according to the embodiment of the present disclosure；
Fig. 7 A shows the schematic equivalent circuit according to the pixel-driving circuit of the embodiment of the present disclosure in the first period；
Fig. 7 B shows the schematic equivalent circuit according to the pixel-driving circuit of the embodiment of the present disclosure in the second period；
Fig. 7 C shows the schematic equivalent circuit according to the pixel-driving circuit of the embodiment of the present disclosure in the third period；
Fig. 7 D shows the schematic equivalent circuit according to the pixel-driving circuit of the embodiment of the present disclosure in the 4th period；
Fig. 8 shows the structural schematic diagram of the display panel according to the embodiment of the present disclosure；
Fig. 9 shows a kind of example layout of the display panel according to the embodiment of the present disclosure；
Figure 10 shows the flow chart of the driving method of the display panel according to the embodiment of the present disclosure；
Figure 11 A and Figure 11 B show the driver' s timing figure according to the pixel-driving circuit of the embodiment of the present disclosure；
Figure 12 shows the exemplary diagram that the driving method according to the embodiment of the present disclosure is executed for continuous three frames image；
Figure 13 shows the structural schematic diagram of the display device according to the embodiment of the present disclosure；And
Figure 14 shows the flow chart of the driving method of the display device according to the embodiment of the present disclosure.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present disclosure clearer, below in conjunction with the embodiment of the present disclosure In attached drawing, clear, complete description is carried out to the technical solution in the embodiment of the present disclosure.Obviously, described embodiment is A part of this disclosure embodiment, rather than all.Based on the described embodiment of the present disclosure, those of ordinary skill in the art exist The every other embodiment obtained under the premise of without creative work belongs to the range of disclosure protection.It is described below In, some specific embodiments are used for description purposes only, and should not be construed has an any restrictions to the disclosure, and the only disclosure The example of embodiment.When may cause understanding of this disclosure and cause to obscure, conventional structure or construction will be omitted.It should be noted that The shape and size of each component do not reflect actual size and ratio in figure, and only illustrate the content of the embodiment of the present disclosure.
Unless otherwise defined, the technical term or scientific term that the embodiment of the present disclosure uses should be those skilled in the art The ordinary meaning understood." first ", " second " used in the embodiment of the present disclosure and similar word are not offered as any suitable Sequence, quantity or importance, and be only intended to distinguish different component parts.
In addition, term " being connected to " or " connected " can refer to that two components are direct in the description of the embodiment of the present disclosure Connection may also mean that and be connected between two components via one or more other assemblies.In addition, the two components can pass through Wired or wireless way is connected or is coupled.
According to its function difference, the transistor used in the embodiment of the present disclosure may include switching transistor transistor and drive Dynamic transistor.Switching transistor transistor and driving transistor all can be thin film transistor (TFT) or field-effect tube or other characteristic phases Same device.
It the use of the source electrode of switching transistor, drain electrode is symmetrical in the embodiment of the present disclosure, so its source electrode, drain electrode can be mutual It changes.In the embodiments of the present disclosure, according to its function, grid is referred to as grid, one in source electrode and drain electrode is known as the first pole, Another in source electrode and drain electrode is known as the second pole.In the following example by taking switching transistor is N-type TFT as an example It is described.It will be understood by those skilled in the art that it is p-type film that the embodiment of the present disclosure, which is expressly intended to apply to switching transistor, The case where transistor.
In addition, term " significant level " is to refer to make connected switching transistor in the description of the embodiment of the present disclosure The level of conducting.It is described so that switching transistor is N-type TFT as an example in following example, therefore " having in example Imitate level " it is opposite high level.It will be understood by those skilled in the art that the disclosure is not limited to this.
Fig. 1 shows a kind of structural schematic diagram of pixel-driving circuit.Fig. 2 shows pixel driver as shown in Figure 1 electricity The operation timing on road schemes.As shown in Figure 1, pixel circuit 10 includes driving transistor DTFT, switching transistor M1, storage capacitance C. When scan signal line gating (scans) certain a line, scanning signal Vscan is low level signal, and switching transistor M1 is connected, Data-signal Vdata is written into storage capacitance C.After the row end of scan, Vscan is changed into high level signal, switchs crystal Pipe M1 shutdown, the grid voltage driving DTFT being stored on storage capacitance C, makes it generate electric current to drive OLED, guarantees OLED The continuous illumination in a frame is shown.Current formula of the thin film transistor (TFT) DTFT when reaching saturation is driven to be
Ioled=K (Vgs-Vth)2,
Wherein K is parameter relevant to the technique of driving transistor DTFT and design, once driving transistor DTFT is made, Parameter K is constant, and Vgs is the gate source voltage for driving thin film transistor (TFT), and Vth is the threshold voltage for driving transistor.Due to Vgs =Vdata-ELVDD, therefore, Ioled=K (Vdata-ELVDD-Vth)2。
From the current formula for driving transistor DTFT above as can be seen that in the OLED pixel driving circuit of Fig. 1, stream The source electrode of the threshold voltage vt h and DTFT of the electric current of transistor DTFT and driving transistor DTFT is driven to terminate supply voltage ELVDD has the relationship of quadratic power.Therefore, super as long as the Vth of transistor DTFT is driven to have between pixel unit and pixel unit The difference of 0.1V is crossed, driving current will be caused obvious deviation occur, causes the brightness of light-emitting component that can accordingly generate difference, is shown It is bad that diagram picture will appear snow.
In order to which the Vth to driving transistor DTFT is compensated, internal compensation technology can be used.But due to including Circuit element it is more, the pixel-driving circuit based on internal compensation usually has biggish circuit structure, is unsuitable for display surface The limited situation in display area in plate.
In addition it is also possible to compensate the electrical parameter of driving transistor DTFT using external compensation technology.According to outside one kind Portion's compensation scheme reads the electrical parameter of driving transistor DTFT in pixel-driving circuit, such as Vth.It is brilliant due to reading driving The electrical parameter of body pipe DTFT usually requires longer time, it is therefore desirable to before the normal display of display panel, i.e., from electricity Source is opened to increasing a period of time between the normal display of display panel, or when normal display terminates to arrive this section of power cutoff Interior increase a period of time, to read the electrical parameter of driving transistor.Then the electrical parameter of reading is saved, so as to subsequent It is compensated in display using electrical parameter of the electrical parameter of reading to respective drive transistor DTFT.However, showing Cheng Zhong drives the electrical parameter of transistor, especially Vth value that can drift about under Vgs stress.According to said external Compensation method cannot dynamically adjust compensation when driving such as Vth of transistor that drift has occurred during display in time Value causes to show that ghost occurs in picture.
The embodiment of the present disclosure provides a kind of pixel-driving circuit structure using pixel unit external compensation.According to this public affairs The external compensation method for opening embodiment can dynamically read the electrical parameter of driving transistor in real time.It is driven during display When the electrical parameter of transistor drifts about, offset can be changed in time, so as to improve the quality of display picture.
Fig. 3 A shows an example block diagram of the pixel-driving circuit according to the embodiment of the present disclosure.Pixel-driving circuit 30 configuration driven light-emitting components 300 shine.In figure 3 a, light-emitting component 300 is shown as light emitting diode OLED.
It as shown in Figure 3A, may include drive sub-circuits 301 according to the pixel-driving circuit of the embodiment of the present disclosure 30.Driving Sub-circuit 301 can connect to data signal line, provide the scan signal line and light-emitting component 300 of scanning signal Vscan.Driving Sub-circuit 301 is configured as under the control of scanning signal Vscan, according to reference voltage signal Vref and comes from data signal line Data voltage Vdata driving light-emitting component 300 shine.According to the embodiment of the present disclosure, drive sub-circuits 301 include driving crystal Pipe.Drive sub-circuits 301 are additionally configured under the control of the sensing voltage signal Vsen from data signal line, and output driving is brilliant The threshold voltage of body pipe.
Pixel-driving circuit 30 can also include reset subcircuit 302.Reset subcircuit 302 is connected to offer reset signal The reseting signal line of Vreset provides the first control signal line and drive sub-circuits 301 of first control signal CONT1.It is multiple Seat circuit 302 is configured under the control of first control signal CONT1, resets driving using reset signal Vreset Circuit 301.For example, reset subcircuit 302 is configurable in the significant level that first control signal CONT1 is such as high level When, by the first node N1 between drive sub-circuits and reset subcircuit and the third between drive sub-circuits and light-emitting component Node N3 is reset to the current potential Vreset of reset signal.
For example, drive sub-circuits 301 are configurable to first between drive sub-circuits 301 and reset subcircuit 302 Data at node including threshold voltage of the output comprising driving transistor.
Fig. 3 B shows an example block diagram of the pixel-driving circuit according to the embodiment of the present disclosure.As shown in Figure 3B, Pixel-driving circuit 30 ' can also include benchmark sub-circuit 303.Benchmark sub-circuit 303 is connected to offer second control signal The second control signal line of CONT2 provides the reference signal line and drive sub-circuits 301 of reference voltage signal Vref.Benchmark Sub-circuit 303 is configurable under the control of second control signal CONT2, and reference voltage signal Vref is supplied to driving Circuit 301.For example, benchmark sub-circuit 303 can be connected to drive sub-circuits 301 at first node N1.In the second control letter When number CONT2 is the significant level of such as high level, reference voltage signal Vref is supplied to driving via first node N1 Circuit 301.
For example, drive sub-circuits 301 are also configured as under the control of scanning signal Vscan, believed according to reference voltage Number and data voltage from data signal line drive the light-emitting component to shine.Using reference voltage signal Vref, in pixel When driving circuit executes display data writing, the first end of light-emitting component OLED can be set to reference voltage, so as to more The display data signal for being input to OLED is controlled well, influences it by other signals.
According to the embodiment of the present disclosure, drive sub-circuits 301 can be arranged in inside the pixel unit in display area, it will Reset subcircuit 302 and benchmark sub-circuit 303 are arranged in non-display area.Pixel-driving circuit portion in pixel unit as a result, Dividing only includes drive sub-circuits 301, can further decrease single pixel unit the space occupied.Those skilled in the art can be with Understand, term " display area " refers to the region that pixel unit is provided in display panel, and term " non-display area " refers to aobvious Show the region that pixel unit is not provided in panel, for example, the peripheral region of display area, commonly used in setting external circuit etc. Structure.
Fig. 4 A shows the circuit diagram of the pixel-driving circuit 40 according to the embodiment of the present disclosure.For example, Fig. 4 A is shown A kind of circuit diagram of pixel-driving circuit in Fig. 3 A.
It as shown in Figure 4 A, may include the first transistor T1 according to the reset subcircuit of the embodiment of the present disclosure 402.First is brilliant The first pole of body pipe T1 is connected to reseting signal line, and grid is connected to first control signal line and the second pole in first node Drive sub-circuits 401 are connected at N1.
As shown in Figure 4 A, drive sub-circuits 403 may include driving transistor DTFT, second transistor T2, third crystal Pipe T3 and first capacitor C1.The grid of second transistor T2 is connected to scan signal line, and the first pole is connected to data signal line, the Two poles are connected to the grid of driving transistor DTFT, i.e. second node N2 in Fig. 4 A.The grid of third transistor T3 is connected to Scan signal line, the first pole are connected to first node N1, and the second pole is connected to the first end of the light-emitting component, i.e. in Fig. 4 A Third node N3.As shown in Figure 4 A, it drives the drain electrode of transistor DTFT to be connected to and the first power supply of first voltage signal V1 is provided The source electrode of line, driving transistor DTFT is connected to the first end of light-emitting component at third node N3.The first of first capacitor C1 End is connected to the grid of driving transistor at second node N2.
Fig. 4 B shows the circuit diagram of the pixel-driving circuit 40 ' according to the embodiment of the present disclosure.For example, Fig. 4 B is shown A kind of circuit diagram of pixel-driving circuit in Fig. 3 B.
As shown in Figure 4 B, unlike Fig. 4 A, the pixel-driving circuit in Fig. 4 B can also include benchmark sub-circuit 403.Benchmark sub-circuit 403 may include the 4th transistor T4.The grid of 4th transistor T2 is connected to second control signal line, First pole is connected to reference signal line, and the second pole is connected to drive sub-circuits 401 at first node N1.For example, the 4th crystal The second pole of pipe T4 can connect the first pole of the third transistor T3 into drive sub-circuits 401.
The sensing signal line Sensing for being connected to first node N1 is also shown in Fig. 4 A and Fig. 4 B.Those skilled in the art The second capacitor C2 that member is appreciated that in Fig. 4 A and Fig. 4 B can be the distribution capacity of sensing signal line Sensing itself, can also To further include the building-out condenser being connected with sensing signal line Sensing, the embodiment of the present disclosure is defined not to this.
According to the embodiment of the present disclosure, as illustrated in figures 4 a and 4b, the second end of light-emitting component OLED be can connect to providing the Two voltage signal V2.It will be understood by those skilled in the art that the second end of light-emitting component OLED can connect to the second electricity of offer The second source line for pressing signal V2, can also be grounded, that is, second voltage signal V2 can be zero potential.
According to the embodiment of the present disclosure, since only drive sub-circuits being arranged in inside the pixel unit in display area, In the example of Fig. 4 A and 4B, the pixel-driving circuit part in pixel unit only include second transistor T2, third transistor T3, Transistor DTFT and first capacitor C1 is driven, the pixel-driving circuit of 3T1C a kind of is substantially realized, simplifies circuit structure, It is more suitable for limited pixel unit space.
According to the embodiment of the present disclosure, although the transistor T4 of the first transistor T1~the 4th in Fig. 4 A and 4B is shown as N Type thin film transistor (TFT), the transistor T4 of the first transistor T1~the 4th may be P-type TFT.Those skilled in the art can To understand, in the case where driving transistor DTFT is N-type TFT, the transistor T4 of the first transistor T1~the 4th is by reality It is now then more conducive to simplify manufacturing process for N-type TFT.
According to the embodiment of the present disclosure, a kind of driving method of pixel-driving circuit is additionally provided.Fig. 5 is shown according to this public affairs Open the flow chart of the driving method of the pixel-driving circuit of embodiment.As shown in figure 5, according to the display device of the embodiment of the present disclosure Driving method 50 may comprise steps of.It should be noted that the serial number of each step is only used as the table of the step in following methods Show to describe, and be not to be seen as indicating each step executes sequence.Unless explicitly stated otherwise, otherwise this method does not need It is executed fully according to shown sequence.
In step S501, in the first period P1, under the control of first control signal CONT1, make to drive using reset signal Mover circuit reset；Under the control of scanning signal, by the grid of sensing voltage signal write driver transistor.
In step S502, in the second period P2, under the control of scanning signal Vscan, stable driving transistor is established Threshold voltage value Vth, wherein driving transistor source potential and the sensing voltage signal difference be drive transistor Threshold voltage value Vth.
In step S503, the source potential of driving transistor is read, and driving crystal is obtained according to the source potential of reading The threshold voltage value Vth of pipe.
According to the embodiment of the present disclosure, the 4th period P4 can also be included in, be written to data signal line and utilize the threshold obtained The display data signal of threshold voltage Vth compensation；Under second control signal control, the display data signal having been compensated for is written and is driven The grid of dynamic transistor and the source electrode that reference voltage signal is written to the driving transistor.
It can apply to data signal line and have in the first period, the second period and third period according to the embodiment of the present disclosure There is the sensing voltage signal Vsen of fixed voltage value, applies in the 4th period P4 to data signal line and utilize the voltage compensation read Display data signal.In addition, scanning signal is to make the second crystalline substance in the first period, the second period, third period and the 4th period The significant level of body pipe and third transistor conducting.
Fig. 6 A shows the driver' s timing figure according to the pixel-driving circuit of the embodiment of the present disclosure, and Fig. 6 B is shown according to this The threshold voltage of the driving transistor of open embodiment reads schematic diagram, and Fig. 7 A is shown to be driven according to the pixel of the embodiment of the present disclosure Circuit is moved in the circuit diagram of the first period P1, Fig. 7 B shows the pixel-driving circuit according to the embodiment of the present disclosure second The circuit diagram of period P2, Fig. 7 C show the circuit according to the pixel-driving circuit of the embodiment of the present disclosure in third period P3 Schematic diagram, Fig. 7 D show the circuit diagram according to the pixel-driving circuit of the embodiment of the present disclosure in the 4th period P4.It connects down Come, Fig. 5, Fig. 6 A, Fig. 6 B, Fig. 7 A, Fig. 7 B, Fig. 7 C and Fig. 7 D will be referred to, the pixel according to the embodiment of the present disclosure is described in detail The operation of driving circuit.It should be noted that being described so that switching transistor is N-type TFT as an example in following example, therefore " significant level " that N-type TFT is connected is opposite high level.
It is high level, the first transistor T1 conducting in the first period P1, first control signal CONT1.Scanning signal Vscan For high level, second transistor T2 and third transistor T3 conducting.Second control signal CONT2 is low level, the 4th transistor T4 cut-off.In the first period P1, apply sensing voltage signal Vsen to data signal line, thus the current potential V of second node N2N2For Vsen, the i.e. grid voltage of driving transistor DTFT are Vsen.Due to the first transistor T1, second transistor T2 and third crystal The current potential of pipe T3 conducting, first node N1 and third node N3 are reset to Vreset, that is, will connect sensing signal line The voltage amplitude of the first end of the first node and light-emitting component OLED of Sensing is Vreset.It therefore, can be by the first period P1 is known as " resetting the period ".First capacitor C1 and the second capacitor C2 of sensing signal line saves initial charge at this time, and driving is brilliant The source voltage of body pipe DTFT is (that is, the current potential V of third node N3N3) it is Vreset.In order to guarantee to drive transistor DTFT the Two period P2 can be to first capacitor C1 and the second capacitor C2 charging and light-emitting component OLED in the first period P1 to third period P3 keeps off state not shine, and Vreset < (Vsen-Vth) < (V can be setOLED+ V2), wherein VOLEDIt is light-emitting component The lasing threshold voltage of OLED, V2 are the voltage of second voltage signal.
It is low level in the second period P2, first control signal CONT1, the first transistor T1 ends, thus reset signal Vreset and first node N1 is disconnected, and then reset signal Vreset and sensing signal line Sensing is disconnected.Scanning signal Vscan remains high level, second transistor T2 and third transistor T3 conducting.In the second period P2, still to data-signal Line applies sensing voltage signal Vsen, since second transistor T2 is connected, drives the current potential V of the grid of transistor DTFTN2Stablize In Vsen.Third transistor T3 conducting, drives the source voltage V of transistor DTFTN3With the current potential V of first nodeN1It is identical.
Fig. 6 B is shown according to the embodiment of the present disclosure, the potential change schematic diagram of each node in the second period P2.It connects down Operation of the pixel-driving circuit in the second period P2 of the embodiment of the present disclosure will be described in detail with reference to Fig. 6 B.Art technology Personnel are appreciated that due to third transistor T3 conducting, the current potential V of third node N3 in the second period P2N3And first node The current potential V of N1N1It is identical.Since second transistor T2 is connected, the current potential V of second node N2N2For Vsen.
As shown in Figure 6B, in the sub-period P21 of the second period P2, the current potential V of third node N3N3With the electricity of first node N1 Position VN1For Vreset.Due to Vreset < (Vsen-Vth), transistor DTFT conducting is driven.Driving transistor DTFT's leads Galvanization Ids starts to fill to the first capacitor C1 and the second capacitor C2 outside pixel unit that are located inside pixel unit Electricity.
Transistor is driven as driving transistor DTFT charges to first capacitor C1 and the second capacitor C2 in sub-period P22 The source voltage V of DTFTN3(and the current potential V of first node N1N1) rise, drive the Vgs=(Vsen-V of transistor DTFTN3) Corresponding to reduce, the Ids of driving transistor DTFT reduces therewith.Theoretically, as the current potential V of third node N3N3With first node Current potential VN1When for (Vsen-Vth), driving transistor DTFT becomes ending.
In sub-period P23, drives transistor DTFT to end and finally establish balance.At this point, due to the voltage of second node VN2Stablize in Vsen, therefore, the voltage V of first nodeN1With the voltage V of second nodeN2Difference be (Vsen-Vth)-Vsen= Vth。
Therefore, the second period P2 can be known as " Vth establishes the period ", that is, when the establishing of threshold voltage vt h of DTFT Section.It will be understood by those skilled in the art that the sub-period P23 in the second period P2, needs long settling time, Cai Nengbao Confirm that existing establish balances.During this period, need for want the scanning signal of compensation pixel row be maintained so that second transistor and The significant level of third transistor conducting.
Next, reading the current potential V of first node via sensing signal line Sensing in third period P3N1=(Vsen- Vth).Since Vsen is known fixed level, pass through Vth=(Vsen-VN1) Vth can be obtained.It therefore can be by the third Period is known as " Vth reads the period ", that is, the current potential V of first node is read via sensing signal line SensingN1.As long as when second When the gate source voltage of section P2 time long enough, driving transistor DTFT realizes stable equilibrium, it is believed that the level of first node VN1For Vsen-Vth.For example, the driving IC being connected via sensing signal line Sensing with first node N1 or processing can be passed through Device etc. reads the current potential V of first nodeN1And calculate the electrical parameter Vth of driving transistor DTFT.
According to the 4th period P4 that the method for the embodiment of the present disclosure can also include after third period P3.In the period In, the display data signal Vdata ' compensated using the Vth read is written to data signal line, for example, Vdata '=Vdata+ Vth, wherein Vdata is raw display data signal.
It is high level, the 4th transistor T4 conducting, thus by first segment in the 4th period P4, second control signal CONT2 The voltage of point N1 is set to reference voltage Vref, i.e. VN1=Vref.Scanning signal Vscan is high level, second transistor T2 and the Three transistor T3 continue to be connected, and the Vdata ' on data signal line is thus written to second node N2 and VN1=VN3.Therefore, Drive the gate source voltage Vgs=V of transistor DTFTN2-VN3=Vdata '-Vref=Vdata+Vth-Vref.It therefore can be by the Four periods were referred to as " display data writing period ".It should be noted that in the display data writing period of the second row pixel unit, Since second control signal CONT2 is high level, reference voltage signal Vref is written into the source electrode of driving transistor DTFT, in order to It prevents from shining in the OLED of display data writing stage the second row pixel unit, Vref can be set are as follows: Vref < (VOLED +V2)。
It will be understood by those skilled in the art that by the way that reference voltage signal is written to the source electrode of driving transistor DTFT Vref can be avoided influence of such as first capacitor C1 for the source potential of driving transistor DTFT.
Next, it is directed to the end of scan of the row pixel unit, the electricity that the gate source voltage Vgs of driving transistor DTFT is provided Ids driving light-emitting component OLED is flowed to shine:
Ids=K (Vgs-Vth)2=K (Vdata+Vth-Vref-Vth)2=K (Vdata-Vref)2
Wherein, K is constant relevant to the technique of driving transistor DTFT and design.
As can be seen that the above driving current Ids is unrelated with the driving threshold voltage vt h of transistor DTFT.Therefore, according to this The pixel-driving circuit of open embodiment can compensate the threshold value Vth of driving transistor DTFT pipe.
It will be understood by those skilled in the art that according to the embodiment of the present disclosure needle can also be executed before the first period P1 The data of current row pixel are shown, what is obtained before can use at this time compensates for the driving transistor Vth of current row pixel Initial data voltage to be shown.In addition it is also possible to which execution is shown for the data of current row pixel after third period P3, no The Vth of the driving transistor for current row pixel read before being to can use with place rather than third period P3 most The Vth of the driving transistor newly read compensates initial data voltage to be shown.
According to the another aspect of the embodiment of the present disclosure, a kind of display panel is provided.Fig. 8 is shown to be implemented according to the disclosure The structural schematic diagram of the display panel of example.As shown in figure 8, may include multiple sweep according to the display panel 80 of the embodiment of the present disclosure Retouch signal wire G1~GN；Multiple data signal line D1~DM；Multiple sensing signal line S1~SM, wherein M and N is positive integer；And Multiple pixel-driving circuits according to the embodiment of the present disclosure.Multiple sensing signal line S1~SMIt is each attached to multiple pixel drivers First node between the drive sub-circuits and reset subcircuit of one of circuit.
As shown in figure 8, may include display area 801 and non-display area according to the display panel of the embodiment of the present disclosure 802；The pixel unit P in display area 801 wherein can be set according to the drive sub-circuits of the embodiment of the present disclosuremnInside, Reset subcircuit and benchmark sub-circuit are arranged in non-display area 802.
It will be understood by those skilled in the art that can also include being swept for generating according to the display panel of the embodiment of the present disclosure Retouch the shift register 810 of signal.Furthermore, it is possible to by the driving IC outside display panel 80 to shift register 810 and picture Plain unit provides control signal and display data signal, reads the voltage in sensing signal line, and utilize the voltage compensation read Corresponding data signal to be shown.It will be understood by those skilled in the art that driving IC can be set inside display panel, it can also To be arranged outside display panel.For simplicity, the embodiment of the present disclosure no longer repeats this.
Fig. 9 shows a kind of example layout of the display panel according to the embodiment of the present disclosure.As shown in figure 9, according to this public affairs The example display panel 90 for opening embodiment may include display area 901 and non-display area 902.Such as first in Fig. 4 is brilliant Body pipe T1 and the 4th transistor T4 can be set in non-display area 902, second transistor T2, third transistor T3, the first electricity Hold C1 and the pixel unit P in display area 901 can be set in driving transistor DTFTmnIt is internal.Those skilled in the art can To understand, in the example of Fig. 9, the second capacitor C2 can be by pixel unit PmnSensing signal line SmDistribution capacity realize.
According to the another aspect of the embodiment of the present disclosure, a kind of driving method of display panel is provided.The driving method can To be applied to the display panel according to the embodiment of the present disclosure.As shown in Figure 10, driving method 100 may comprise steps of.
In step S1001, at least part in picture is shown for multiframe, so that with the multiple scan signal line The connected pixel-driving circuit of at least one scan signal line execute the driving method according to the embodiment of the present disclosure.
For example, being applied to effective electricity of the scanning signal of at least one scan signal line according to the embodiment of the present disclosure The flat duration is applied to the significant level of the scanning signal of remaining scan signal line in the multiple scan signal line A times of duration, A are greater than 2 integer.
For example, changing the scanning signal of corresponding scan signal line by the width for the clock signal for changing scan signal line Significant level duration.
According to the embodiment of the present disclosure, between an at least frame shows that picture and former frame or a later frame are shown between picture It is arranged to (A-1) times of the duration of the significant level of the scanning signal of remaining scan signal line every the time.
The drive of the display panel according to the embodiment of the present disclosure is described in detail next with reference to Figure 10, Figure 11 A and Figure 11 B Dynamic method.
According to the embodiment of the present disclosure, in the Vth reading process of above-mentioned driving transistor, by the long period is needed Two period P2 are come the precision of the Vth guaranteed.This is because N1 establishes Vth voltage to needs in the first stage, if established Between it is too short, first capacitor C1 and the second capacitor C2 are not full of voltage Vth, and first capacitor C1 and the second capacitor C2 is caused to only complete Part Vth voltage charging, in this way from there are certain deviations between the Vth and practical Vth that first node N1 is read.
In order to pursue higher display image quality, modern display device generallys use the driving method of high refresh rate.Such as it is general All over the refresh rate using 60Hz, the refresh rate of 120Hz or higher 240Hz can be used for the display device of high image quality.It is brushing In the case that new rate and resolution ratio are fixed, the sweep time of every a line is determining.For example, for the aobvious of full HD FHD 60Hz Show panel, the sweep time of every a line is 14.8us, if only in a line time by driving transistor DTFT to capacitor charging, can It can only be charged to practical Vth 70% or so.
In order to improve the precision of Vth reading, the horizontal-scanning interval of several rows or tens rows can be used to establish Vth.It examines Consider sufficient horizontal-scanning interval, according to the embodiment of the present disclosure, at least frame in picture can be shown for multiframe rather than All frames execute the image element driving method of the embodiment of the present disclosure.In addition, picture is shown for a frame, it can be only to wherein at least A line is without being that the pixel unit of all rows executes the image element driving method of the embodiment of the present disclosure.
Figure 11 A and Figure 11 B show the signal sequence of the example driving method according to the display panel of the embodiment of the present disclosure Figure.Wherein the example of Figure 11 A shows the pixel that the embodiment of the present disclosure is executed for the second row pixel unit of first frame image Driving method, the example of Figure 11 B show the picture that the embodiment of the present disclosure is executed for the third line pixel unit of the second frame image Plain driving method.It will be understood by those skilled in the art that other that can of course be directed in first frame image and the second frame image The image element driving method of the row pixel unit execution embodiment of the present disclosure.
As shown in Figure 11 A, when showing first frame image, traditional pixel is executed for all pixels unit of the first row Driving method.For example, for the first row all pixels unit do not execute the reset of the embodiment of the present disclosure, threshold voltage establish and Threshold voltage is read, and only executes display data writing so that all pixels unit of the first row shines.For example, can be to the first row All pixels unit write-in utilize before read the compensated display data of threshold voltage value.When scanning to the second row pixel When unit, the image element driving method according to the embodiment of the present disclosure is executed, i.e., for the driving transistor in pixel-driving circuit DTFT executes threshold voltage foundation and threshold voltage is read.
When the pixel unit for the second row executes the above-described reset period, Vth establishes the period and Vth is read Duan Hou reads the Vth of pixel unit and is stored in such as storage unit, the offset data as the second row pixel unit.It Afterwards, compensated display data can be written to the second row pixel unit in the display data writing period of the second row pixel unit Vdata2’So that the second row pixel unit normal luminous.
In addition, other row pixel units for the third line pixel unit and later, can not execute new reset, threshold value Voltage Establishment and read operation, but directly apply to the pixel units such as the third line, fourth line ... and utilize acquisition before For the corresponding display data V of the threshold voltage value compensation of corresponding row pixel unitdata3、Vdata4,.......If in this frame There are no corresponding threshold voltage value is obtained in the display of picture, then it can use in the display of previous frame picture or other be nearest The threshold voltage value of acquisition compensates.
As shown in Figure 11 B, when showing the second frame image, the embodiment of the present disclosure can be executed for the third line pixel unit Image element driving method.It, can be directly to the first row and the second row pixel when scanning to the first row and the second row pixel unit Unit applies the corresponding display number for the compensation of the threshold voltage value of the first row and the second row pixel unit for utilizing and obtaining before According to.When the third line pixel unit is arrived in scanning, the pixel circuit according to the embodiment of the present disclosure is executed to the pixel unit of the third line Driving method, execution above-described reset period, threshold voltage establish the period and threshold voltage reads the period, to read The threshold voltage value of each pixel unit of the third line is simultaneously stored in such as storage unit, the compensation number as the third line pixel unit According to.It is then possible to which compensated display data V is written to the third line pixel unitdata3’So that the third line pixel unit is normally sent out Light.And so on, next frame can read the Vth value of fourth line pixel unit ... own until on display panel Pixel unit has been performed both by the pixel circuit drive method according to the embodiment of the present disclosure.Next it can recycle and read next group of picture The Vth data of plain unit.Such as the first row, the Vth data of the second row ... can be successively read according to above example sequence, The Vth data of the pixel unit of any two row of reading data or more row can also be shown for a frame, this has been depended on whether Enough Vth settling times.
According to the embodiment of the present disclosure, it is applied to the scanning signal that execute the image element driving method according to the embodiment of the present disclosure The duration of the scanning signal of line is greater than the scanning for not executing the scan signal line of image element driving method of the embodiment of the present disclosure The duration of signal.It, can be by driving IC to be controlled according to a kind of example, it will be for that a line that execute Vth reading The clock signal HCLK of shift register widen.As seen in figs. 11a and 11b, when designing timing, if for only carrying out The clock signal pulse width of the scan line of tradition display is 1H, that is, the significant level of the scanning signal Vscan of corresponding row (shows Be the first level in example) duration be 1H, then be directed to execute according to the image element driving method of the embodiment of the present disclosure that The reset period of one-row pixels unit can be 1H, and Vth establishes the period can be for 3H, and Vth reads the period and display data are write Entering the period can be altogether 1H.Thus, it is possible to which the clock signal HCLK of the shift register of that a line of Vth reading will be executed Width design be 5H, significant level duration of the scanning signal Vscan or Gn of the shift register output is 5H, i.e., 14.8us × 5, about 74us time.That is, being applied to holding for the significant level of the scanning signal of at least one scan signal line The continuous time be applied to the significant level of the scanning signal of remaining scan signal line in the multiple scan signal line it is lasting when Between A times, A is greater than 2 integer.In this example, A=5.
By taking the resolution ratio of display panel is 1440 × 2560 as an example, 2560 scan lines are shared.For example, being directed to one-row pixels The image element driving method that unit executes the present embodiment, which is read, needs time of 5H, wherein resetting the period is that 1H, Vth establish the period and be It can be 1H that 3H, Vth, which read period and display data writing period altogether, then the active line of this frame needs 2560 + 4=2564 row.Therefore, the frame picture and former frame can be shown that picture or a later frame show the interval time between picture (for example, vertical blanking (vertical Blank) period) is set as at least more than (A-1)=4 row to complete all 2560 rows The scanning of pixel unit is shown.According to the embodiment of the present disclosure, if needing A horizontal-scanning interval to complete a frame image There is Vth reading data, needs to set additional at least (A-1) horizontal-scanning interval as vertical blank interval.
It will be understood by those skilled in the art that for simplicity, establishing the period in above example to reset the period for 1H, Vth It can be that read period and display data writing period be to be described for 1H altogether by 3H, Vth.In practical application, Vth is established Period may need dozens of H that could preferably realize that Vth is established.In one example, it can be 60H that Vth, which establishes the period,.Figure 12 The exemplary diagram that the driving method according to the embodiment of the present disclosure is executed for continuous three frames image is shown, wherein being directed to the 1st respectively The 1st row pixel unit, the 2nd row pixel unit for the 2nd frame and the 3rd row pixel unit for the 3rd frame of frame execute root According to the image element driving method of the embodiment of the present disclosure, wherein the Vth reading data of one-row pixels unit needs the time of 62H, wherein Resetting the period is that establish the period be 60H by 1H, Vth, and Vth reads the period and to have altogether be 1H the display data writing period.This field Technical staff is understood that, it is of course possible to execute for the multirow pixel unit in a frame and be driven according to the pixel of the embodiment of the present disclosure Dynamic method.
According to the embodiment of the present disclosure, a kind of display device is additionally provided.Figure 13 is shown according to the aobvious of the embodiment of the present disclosure The structural schematic diagram of showing device 130.It as shown in figure 13, may include driving collection according to the display device of the embodiment of the present disclosure 130 At IC circuit 1310 and according to the display panel 1320 of the embodiment of the present disclosure.It will be understood by those skilled in the art that although Figure 13 It is middle to be shown as driving IC 1310 that the outside of display panel 1320 is arranged in, driving IC 1310 can also be integrated in display surface The inside of plate 1320, such as the non-display area of display panel 1320.The embodiment of the present disclosure is limited not to this.
It can be Electronic Paper, mobile phone, tablet computer, television set, display according to the display device 130 of the embodiment of the present disclosure Any products or components having a display function such as device, laptop, Digital Frame, navigator.
According to the embodiment of the present disclosure, a kind of driving method of display device according to the embodiment of the present disclosure is additionally provided.Such as Upper described, the display device according to the embodiment of the present disclosure may include driving IC and the display panel according to the embodiment of the present disclosure. Such as shown in the example of Fig. 8 and Fig. 9, the display panel according to the embodiment of the present disclosure may include multiple scan signal lines；It is more A data signal line；Multiple sensing signal lines；And multiple pixel-driving circuits according to the embodiment of the present disclosure.Such as showing for Fig. 3 A It may include drive sub-circuits according to each of multiple pixel-driving circuits of the embodiment of the present disclosure shown in example, the drive One in mover circuit connection one into the multiple data signal line, the multiple scan signal line and the member that shines Part.Drive sub-circuits are configured under the control from the scanning signal of connected scan signal line, according to from connected number The light-emitting component is driven to shine according to the data voltage of signal wire.Each pixel-driving circuit can also include resetting son electricity Road, reset subcircuit, which is connected to, to be provided the reseting signal line of reset signal, provides the first control signal line of first control signal And the drive sub-circuits, the reset subcircuit are configured under the control of first control signal, utilize reseting signal reset The drive sub-circuits；Wherein, the drive sub-circuits include driving transistor, and the drive sub-circuits are additionally configured to coming from Under the control of the sensing voltage signal of connected data signal line, between the drive sub-circuits and the reset subcircuit Data at first node including threshold voltage of the output comprising driving transistor.Wherein, more as shown in the example of Fig. 8 and Fig. 9 One in a sensing signal line is connected to the first node.It will be understood by those skilled in the art that for simplicity, in attached drawing Reseting signal line and first control signal line etc. is not shown.
Figure 14 shows the flow chart of the driving method of the display device according to the embodiment of the present disclosure.As shown in figure 14, root It may comprise steps of according to the driving method 1400 of the display device of the embodiment of the present disclosure.It should be noted that each in following methods The serial number of step is only used as the expression of the step to describe, and be not to be seen as indicating each step executes sequence.It removes It non-clearly points out, otherwise this method does not need to execute fully according to shown sequence.
In step S1401, IC is driven to apply sensing voltage signal to connected pixel-driving circuit via data signal line And apply scanning signal to the connected pixel-driving circuit via scan signal line.
In step S1402, IC is driven to obtain the crystalline substance of the driving in the connected pixel-driving circuit via sensing signal line The threshold voltage value of body pipe.
In step S1403, drive IC using the threshold voltage value compensation display data signal obtained and via the data The compensated display data signal is written to the connected pixel-driving circuit in signal wire.
Wherein, driving IC changes the scanning by changing the pulse width of the clock signal for generating scanning signal The duration of the significant level of signal.
It should be noted that in the above description, only in an illustrative manner, showing the technical side of the embodiment of the present disclosure Case, but it is not meant to that the embodiment of the present disclosure is confined to above-mentioned steps and structure.In a likely scenario, it can according to need pair Step and structure are adjusted and accept or reject.Therefore, certain steps and unit are not the overall thought institute for implementing the embodiment of the present disclosure Required element.
So far preferred embodiment is had been combined the disclosure is described.It should be understood that those skilled in the art are not In the case where the spirit and scope for being detached from the embodiment of the present disclosure, various other changes, replacement and addition can be carried out.Therefore, The range of the embodiment of the present disclosure is not limited to above-mentioned specific embodiment, and should be defined by the appended claims.

Claims (20)

1. a kind of pixel-driving circuit, which is characterized in that it is configured to driving light-emitting component and shines, the pixel-driving circuit packet It includes:
Drive sub-circuits, the drive sub-circuits are connected to data signal line, provide the scan signal line of scanning signal and shine Element, the drive sub-circuits are configured under the control of scanning signal, are driven according to the data voltage from data signal line The light-emitting component shines；And
Reset subcircuit, the reset subcircuit, which is connected to, to be provided the reseting signal line of reset signal, provides first control signal First control signal line and the drive sub-circuits, the reset subcircuit be configured under the control of first control signal, Utilize drive sub-circuits described in reseting signal reset；
Wherein, the drive sub-circuits include driving transistor, and the drive sub-circuits are additionally configured to from data signal line Sensing voltage signal control under, the threshold voltage of output driving transistor.
2. pixel-driving circuit according to claim 1, wherein the drive sub-circuits are additionally configured in drive sub-circuits Data at first node between reset subcircuit including threshold voltage of the output comprising the driving transistor.
3. pixel-driving circuit according to claim 1, wherein the reset subcircuit includes the first transistor,
Wherein the first pole of the first transistor is connected to reseting signal line, and grid is connected to the first control signal line, and Second pole is connected to drive sub-circuits at first node.
4. pixel-driving circuit according to claim 1, wherein the drive sub-circuits further include second transistor, Three transistors and first capacitor, wherein
The grid of the second transistor is connected to scan signal line, and the first pole is connected to the data signal line, and the second pole connects It is connected to the grid of the driving transistor；
The grid of the third transistor is connected to the scan signal line, and the first pole is connected to the first node, the second pole It is connected to the first end of the light-emitting component；
The drain electrode of the driving transistor, which is connected to, provides the first power supply line of first voltage signal, and source electrode is connected to described shine The first end of element；And
The first end of the first capacitor is connected to the grid of the driving transistor.
5. pixel-driving circuit according to claim 1, wherein the drive sub-circuits are additionally configured in scanning signal Under control, according to reference voltage signal and the data voltage from data signal line drives the light-emitting component to shine；
The pixel-driving circuit further includes benchmark sub-circuit, be connected to provide second control signal second control signal line, The reference signal line and the drive sub-circuits, the benchmark sub-circuit for providing reference voltage signal are configured in the second control Under the control of signal, reference voltage signal is supplied to the drive sub-circuits.
6. pixel-driving circuit according to claim 5, wherein the benchmark sub-circuit include the 4th transistor, the 4th The grid of transistor is connected to second control signal line, and the first pole is connected to reference signal line, and the second pole connects at first node It is connected to the drive sub-circuits.
7. pixel-driving circuit according to claim 4, wherein the second end of the light-emitting component is connected to offer second The second source line of voltage signal.
8. a kind of display panel, comprising:
Multiple scan signal lines；
Multiple data signal lines；
Multiple sensing signal lines；And
Multiple pixel-driving circuits as described in one of claim 1~7；
Wherein, the multiple sensing signal line is each attached to the drive sub-circuits of one of the multiple pixel-driving circuit and answers First node between the circuit of seat.
9. display panel according to claim 8, including display area and non-display area；The wherein drive sub-circuits Within the display area, the reset subcircuit and benchmark sub-circuit are arranged in the non-display area for setting.
10. a kind of display device, including drive integrated circult IC and display panel as claimed in claim 8 or 9.
11. a kind of image element driving method, applied to pixel-driving circuit described according to claim 1 one of -7, the pixel Driving method includes:
In the first period, under the control of first control signal, reset drive sub-circuits using reset signal；In scanning signal Control under, by the grid of sensing voltage signal write driver transistor；
In the second period, under the control of scanning signal, the threshold voltage value of stable driving transistor is established, wherein the sense Surveying voltage signal and driving the difference of the source potential of transistor is the threshold voltage value for driving transistor；And
In the third period, the source potential of driving transistor is read, and driving transistor is obtained according to the source potential of reading Threshold voltage value.
12. image element driving method according to claim 11, wherein in the first period to third period, to the data Signal wire applies sensing voltage signal.
13. image element driving method according to claim 11, further includes: in the 4th period, write to the data signal line Enter the display data signal using the threshold voltage value compensation obtained；Under second control signal control, the display that will have been compensated for Data-signal is written the grid of the driving transistor and reference voltage signal is written to the source electrode of the driving transistor.
14. image element driving method according to claim 13, wherein in the first period, the second period, third period and Four periods, the scanning signal are the significant level that second transistor and third transistor is connected.
15. image element driving method according to claim 11, wherein Vreset < (Vsen-Vth) < (Voled+V2), Wherein, Vreset is the voltage of reset signal, and Vsen is the voltage of sensing voltage signal, and Voled is the hair of the light-emitting component Light threshold voltage, V2 are the voltage of the second voltage signal.
16. a kind of driving method of display panel, applied to display panel according to claim 8 or claim 9, the driving side Method includes:
Show that at least frame in picture shows picture for multiframe, so that at least one of with the multiple scan signal line The connected pixel-driving circuit of scan signal line executes the driving method as described in one of claim 11~15.
17. driving method according to claim 16, wherein be applied to the scanning letter of at least one scan signal line Number duration of significant level be applied to the scanning signal of remaining scan signal line in the multiple scan signal line A times of the duration of significant level, A are greater than 2 integer.
18. driving method according to claim 17, wherein by changing the clock signal for generating scanning signal Pulse width changes duration of the significant level of the scanning signal.
19. driving method according to claim 17, wherein an at least frame shows picture and former frame or a later frame Interval time between display picture be arranged to the significant level of the scanning signal of remaining scan signal line it is lasting when Between at least (A-1) times.
20. a kind of driving method of display device, the display device includes display panel and drive integrated circult IC；
The display panel includes multiple scan signal lines；Multiple data signal lines；Multiple sensing signal lines；And multiple pixels Driving circuit；
Wherein, each of multiple pixel-driving circuits include drive sub-circuits, and the drive sub-circuits are connected to described more One in a data signal line, one and light-emitting component in the multiple scan signal line, the drive sub-circuits configuration For under the control from the scanning signal of connected scan signal line, according to the data voltage from connected data signal line The light-emitting component is driven to shine；And reset subcircuit, the reset subcircuit, which is connected to, provides the reset letter of reset signal Number line, the first control signal line for providing first control signal and the drive sub-circuits, the reset subcircuit are configured to Under the control of first control signal, drive sub-circuits described in reseting signal reset are utilized；Wherein, the drive sub-circuits include driving Dynamic transistor, the drive sub-circuits are additionally configured under the control of the sensing voltage signal from connected data signal line, Threshold voltage of the output comprising driving transistor at first node between the drive sub-circuits and the reset subcircuit Data inside；
Wherein, one in the multiple sensing signal line is connected to the first node；
The driving method includes:
The driving IC applies sensing voltage signal to connected pixel-driving circuit via data signal line and believes via scanning Number line applies scanning signal to the connected pixel-driving circuit；
The driving IC obtains the threshold value electricity of the driving transistor in the connected pixel-driving circuit via sensing signal line Pressure value；And
The driving IC is using the threshold voltage value compensation display data signal obtained and via the data signal line to described The compensated display data signal is written in connected pixel-driving circuit；
Wherein, the driving IC changes the scanning by changing the pulse width of the clock signal for generating scanning signal The duration of the significant level of signal.
CN201811281987.3A 2018-10-30 2018-10-30 Pixel driving circuit, display panel, driving method of display panel and display device Active CN109377944B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811281987.3A CN109377944B (en) 2018-10-30 2018-10-30 Pixel driving circuit, display panel, driving method of display panel and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811281987.3A CN109377944B (en) 2018-10-30 2018-10-30 Pixel driving circuit, display panel, driving method of display panel and display device

Publications (2)

Publication Number Publication Date
CN109377944A true CN109377944A (en) 2019-02-22
CN109377944B CN109377944B (en) 2020-11-27

Family

ID=65391015

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811281987.3A Active CN109377944B (en) 2018-10-30 2018-10-30 Pixel driving circuit, display panel, driving method of display panel and display device

Country Status (1)

Country Link
CN (1) CN109377944B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110428776A (en) * 2019-08-14 2019-11-08 京东方科技集团股份有限公司 Pixel circuit and detection method, display panel and display device
CN112951132A (en) * 2021-02-07 2021-06-11 合肥京东方光电科技有限公司 Detection circuit, driving circuit, display panel and driving method thereof
CN113012638A (en) * 2020-12-31 2021-06-22 上海天马有机发光显示技术有限公司 Display panel, driving method thereof and display device
US20230154400A1 (en) * 2020-02-26 2023-05-18 Boe Technology Group Co., Ltd. Pixel circuitry, method for driving pixel circuitry, and display device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102768821A (en) * 2012-08-07 2012-11-07 四川虹视显示技术有限公司 AMOLED (active matrix/organic light emitting diode) display and driving method of AMOLED display
US20180033372A1 (en) * 2015-02-10 2018-02-01 Sharp Kabushiki Kaisha Display device and drive method therefor
CN107657923A (en) * 2017-11-15 2018-02-02 合肥鑫晟光电科技有限公司 The detection method of image element circuit, the driving method of display panel, display device and image element circuit
CN108597449A (en) * 2018-04-26 2018-09-28 京东方科技集团股份有限公司 The detection method of pixel circuit, the driving method of display panel and display panel
CN108615505A (en) * 2018-05-14 2018-10-02 京东方科技集团股份有限公司 The parameter method for detecting and device of driving transistor, compensation method
CN108877685A (en) * 2018-07-20 2018-11-23 深圳市华星光电半导体显示技术有限公司 A kind of OLED pixel driving circuit and OLED display

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102768821A (en) * 2012-08-07 2012-11-07 四川虹视显示技术有限公司 AMOLED (active matrix/organic light emitting diode) display and driving method of AMOLED display
US20180033372A1 (en) * 2015-02-10 2018-02-01 Sharp Kabushiki Kaisha Display device and drive method therefor
CN107657923A (en) * 2017-11-15 2018-02-02 合肥鑫晟光电科技有限公司 The detection method of image element circuit, the driving method of display panel, display device and image element circuit
CN108597449A (en) * 2018-04-26 2018-09-28 京东方科技集团股份有限公司 The detection method of pixel circuit, the driving method of display panel and display panel
CN108615505A (en) * 2018-05-14 2018-10-02 京东方科技集团股份有限公司 The parameter method for detecting and device of driving transistor, compensation method
CN108877685A (en) * 2018-07-20 2018-11-23 深圳市华星光电半导体显示技术有限公司 A kind of OLED pixel driving circuit and OLED display

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110428776A (en) * 2019-08-14 2019-11-08 京东方科技集团股份有限公司 Pixel circuit and detection method, display panel and display device
WO2021027897A1 (en) * 2019-08-14 2021-02-18 京东方科技集团股份有限公司 Pixel unit, array substrate, display panel, and display apparatus
US11636789B2 (en) 2019-08-14 2023-04-25 Boe Technology Group Co., Ltd. Pixel unit, array substrate, display panel, display apparatus, and detection method of pixel circuit
US20230154400A1 (en) * 2020-02-26 2023-05-18 Boe Technology Group Co., Ltd. Pixel circuitry, method for driving pixel circuitry, and display device
US11948507B2 (en) * 2020-02-26 2024-04-02 Boe Technology Group Co., Ltd. Pixel circuitry, method for driving pixel circuitry, and display device
CN113012638A (en) * 2020-12-31 2021-06-22 上海天马有机发光显示技术有限公司 Display panel, driving method thereof and display device
CN113012638B (en) * 2020-12-31 2022-04-05 武汉天马微电子有限公司 Display panel, driving method thereof and display device
CN112951132A (en) * 2021-02-07 2021-06-11 合肥京东方光电科技有限公司 Detection circuit, driving circuit, display panel and driving method thereof
US11935444B2 (en) 2021-02-07 2024-03-19 Hefei Boe Optoelectronics Technology Co., Ltd. Detection circuit, driving circuit, and display panel and driving method therefor

Also Published As

Publication number Publication date
CN109377944B (en) 2020-11-27

Similar Documents

Publication Publication Date Title
CN101599249B (en) Display apparatus, driving methods and electronic instruments
CN109841193B (en) OLED display panel and OLED display device comprising same
CN105679251B (en) Touch-control display module and its driving method, touch-control display panel and device
CN104409047B (en) Pixel driving circuit, pixel driving method and display device
CN105096838B (en) Display panel and its driving method and display device
CN104850270B (en) Driving method, drive circuit, touch module, panel and the device of touch module
WO2019233120A1 (en) Pixel circuit and driving method therefor, and display panel
US7511691B2 (en) Display drive device and display apparatus having same
CN109377944A (en) Pixel-driving circuit, display panel and its driving method and display device
CN110021263A (en) Pixel circuit and its driving method, display panel
TWI602169B (en) Scan driver and organic light emitting diode display using the same
CN109599062A (en) Pixel circuit and its driving method, display device
CN108399895A (en) Display panel and its driving method, display device
CN108597450A (en) Pixel circuit and its driving method, display panel
CN109523956A (en) Pixel circuit and its driving method, display device
CN103714778B (en) Image element circuit, the driving method of image element circuit and display device
CN106960658A (en) Organic light-emitting display device and its driving method
CN102498510B (en) Pixel circuit and display device
CN109584808A (en) Pixel-driving circuit, display device and driving method
CN110010072A (en) Pixel circuit and its driving method, display device
CN109523954A (en) Pixel unit, display panel, driving method and compensating control method
CN103578424A (en) Display panel, display apparatus, and electronic system
CN102460557B (en) Pixel circuit and display device
CN108922474A (en) A kind of pixel compensation circuit and its driving method, AMOLED display panel
CN102034426B (en) Organic light emitting display and driving method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant