CN107680536B - Pixel circuit, its driving method and organic light emitting display panel, display device - Google Patents
Pixel circuit, its driving method and organic light emitting display panel, display device Download PDFInfo
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- CN107680536B CN107680536B CN201711012790.5A CN201711012790A CN107680536B CN 107680536 B CN107680536 B CN 107680536B CN 201711012790 A CN201711012790 A CN 201711012790A CN 107680536 B CN107680536 B CN 107680536B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
-
- 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]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
Abstract
The invention discloses a kind of pixel circuit, its driving method and organic light emitting display panel, display device, which includes: Data write. module, data conditioning module, drive module, light emitting control module and luminescent device；The change amount signal of data-signal and initializing signal end is supplied to the control terminal of drive module by Data write. module and data conditioning module, wherein, the change amount signal at initializing signal end is greater than zero and is less than or equal to the data-signal variable quantity of data signal end, so that the control terminal of drive module not only has received data-signal, also have received the change amount signal at initializing signal end, to increase the voltage change range of the control terminal of drive module, and then the brightness regulation range of luminescent device is improved, expand application scenarios range.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of pixel circuits, its driving method and organic light emitting display
Panel, display device.
Background technique
With the popularity of the internet and the continuous development of display technology, the display panel of high-quality have become numerous electricity
The important feature of sub- consumer products.It is compared, organic electroluminescence with liquid crystal display panel (Liquid Crystal Display, LCD)
Light emitting display panel (Organic Light Emitting Diode, OLED) have self-luminous, low energy consumption, production cost is low,
Visual angle is wide, contrast is high, the displaying of fast response time, color is more true to nature, is more easily implemented the advantages that lightening and flexibility.Mesh
Before, in display fields such as mobile phone, digital camera, computer, personal digital assistants, it is traditional that OLED display panel has begun substitution
LCD display panel is expected to become the mainstream selection of next-generation display panel.
In OLED display panel, due to the limitation of processing procedure, the data signal range for passing to pixel has certain limit
System, so that brightness regulation range is limited.Limited brightness regulation range then can further limit the use field of OLED display panel
Scape.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of pixel circuit, its driving method and organic light emitting display panel, aobvious
Showing device, to increase the brightness regulation range of pixel in organic light emitting display panel.
Therefore, a kind of pixel circuit provided in an embodiment of the present invention, comprising: Data write. module, data conditioning module, drive
Dynamic model block, light emitting control module and luminescent device；
First control terminal of the Data write. module is connected with the first scanning signal end, the second control terminal and the second scanning
Signal end is connected, and input terminal is connected with data signal end, and output end is connected with first node；The Data write. module is used for
Under the co- controlling at first scanning signal end and second scanning signal end, by the data-signal of the data signal end
It is supplied to the first node；
The control terminal of the data conditioning module is connected with voltage control signal end, input terminal and initializing signal end phase
Even, output end is connected with the first node；The data conditioning module is used under the control at the voltage control signal end,
The change amount signal at the initializing signal end is supplied to the first node, wherein the signal at the initializing signal end
Variable quantity is greater than zero and is less than or equal to the data-signal variable quantity of the data signal end；
The control terminal of the drive module is connected with the first node, and input terminal is connected with the first power end, output end
It is connected with second node；The control terminal of the light emitting control module is connected with LED control signal end, input terminal and described second
Node is connected, and output end is connected with third node；One end of the luminescent device is connected with the third node, the other end and
Two power ends are connected；The drive module is used for luminescent device described in the light emitting control module drive by conducting and shines.
In one possible implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, the data are write
Enter module, comprising: first switch transistor and second switch transistor；
The grid of the first switch transistor is connected with first scanning signal end, source electrode and the data signal end
It is connected, drain electrode is connected with the first node；
The grid of the second switch transistor is connected with second scanning signal end, drain electrode and the data signal end
It is connected, source electrode is connected with the first node.
In one possible implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, the driving mould
Block, comprising: driving transistor；
The grid of the driving transistor is connected with the first node, and source electrode is connected with first power end, drain electrode
It is connected with the second node.
In one possible implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, the luminous control
Molding block, comprising: third switching transistor；
The grid of the third switching transistor is connected with the LED control signal end, drain electrode and the second node phase
Even, source electrode is connected with the third node.
In one possible implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, the data tune
Save module, comprising: the 4th switching transistor and capacitor；
The grid of 4th switching transistor is connected with the voltage control signal end, drain electrode and the initializing signal
End is connected, and source electrode is connected with one end of the capacitor, and the other end of the capacitor is connected with the first node.
In one possible implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, the data tune
The control terminal for saving module includes the first control terminal and the second control terminal, and input terminal includes first input end and the second input terminal, defeated
Outlet includes the first output end and second output terminal, and the voltage control signal end includes first voltage control signal end and second
Voltage control signal end, the initializing signal end include the first initializing signal end and the second initializing signal end, and described the
One node includes the first child node and the second child node；And first control terminal and the first voltage control signal end phase
Even, second control terminal is connected with the second voltage control signal end, the first input end and first initialization
Signal end is connected, and second input terminal is connected with second initializing signal end, first output end and described first
Child node be connected, the second output terminal is connected with second child node, the output end of the Data write. module with it is described
First child node is connected, and the control terminal of the drive module is connected with second child node；The data conditioning module, packet
It includes: the 4th switching transistor, the 5th switching transistor and capacitor；
The grid of 4th switching transistor is connected with the first voltage control signal end, at the beginning of drain electrode and described first
Beginningization signal end is connected, and source electrode is connected with first child node；
The grid of 5th switching transistor is connected with the second voltage control signal end, at the beginning of drain electrode and described second
Beginningization signal end is connected, and source electrode is connected with second child node；
One end of the capacitor is connected with first child node, and the other end is connected with second child node.
The embodiment of the invention also provides a kind of organic light emitting display panels, including above-mentioned pixel circuit.
The embodiment of the invention also provides a kind of display devices, including above-mentioned organic light emitting display panel.
The embodiment of the invention also provides a kind of driving methods of above-mentioned pixel circuit, comprising:
Data write phase, co- controlling of the Data write. module at the first scanning signal end and the second scanning signal end
Under, the data-signal of data signal end is supplied to the first node；Control of the data conditioning module at voltage control signal end
Under system, the first signal of storing initial signal end output；
Data area adjusts the stage, and the data conditioning module stores described first under the control at voltage control signal end
The second signal of beginningization signal end output, and the difference of the second signal and first signal is supplied to the first segment
Point, wherein the second signal and the difference of first signal are greater than zero and are less than or equal to the number of the data signal end
According to change amount signal；
Light emitting phase, light emitting control module is under the control at LED control signal end, by the second node and described the
The conducting of three nodes；The drive module is under the control of the first node, by the light emitting control module of conducting, by
The signal of one power end is exported to the third node, and the luminescent device is driven to shine.
The embodiment of the invention also provides a kind of driving methods of above-mentioned pixel circuit, comprising:
Initial phase, data conditioning module is under the control of first voltage control signal end, storage the first initialization letter
Number end output the first signal；And under the control of second voltage control signal end, the output of the second initializing signal end of storage
Second signal；
Data area adjusts stage, common control of the Data write. module at the first scanning signal end and the second scanning signal end
Under system, the data-signal of data signal end is supplied to the first child node；The data conditioning module by the second signal and
The difference of first signal and the sum of the data-signal of the data signal end are supplied to the second child node, wherein described the
The difference of binary signal and first signal is greater than zero and is less than or equal to the data-signal variable quantity of the data signal end；
Light emitting phase, light emitting control module is under the control at LED control signal end, by the second node and described the
The conducting of three nodes；The drive module, will by the light emitting control module of conducting under the control of second child node
The signal of first power end is exported to the third node, and the luminescent device is driven to shine.
The present invention has the beneficial effect that:
Pixel circuit provided in an embodiment of the present invention, its driving method and organic light emitting display panel, display device, the picture
Plain circuit includes: Data write. module, data conditioning module, drive module, light emitting control module and luminescent device；Data write-in
First control terminal of module is connected with the first scanning signal end, and the second control terminal is connected with the second scanning signal end, input terminal with
Data signal end is connected, and output end is connected with first node；Data write. module at the first scanning signal end and second for sweeping
Under the co- controlling for retouching signal end, the data-signal of data signal end is supplied to first node；The control of data conditioning module
End is connected with voltage control signal end, and input terminal is connected with initializing signal end, and output end is connected with first node；Data are adjusted
Module is used under the control at voltage control signal end, and the change amount signal at initializing signal end is supplied to first node,
In, the change amount signal at initializing signal end is greater than zero and is less than or equal to the data-signal variable quantity of data signal end；Driving
The control terminal of module is connected with first node, and input terminal is connected with the first power end, and output end is connected with second node；Shine control
The control terminal of molding block is connected with LED control signal end, and input terminal is connected with second node, and output end is connected with third node；
One end of luminescent device is connected with third node, and the other end is connected with second source end；Drive module is used for the hair by conducting
Photocontrol module drive luminescent device shines.As can be seen that in embodiments of the present invention, passing through Data write. module and data tune
The change amount signal of data-signal and initializing signal end is supplied to the control terminal of drive module by section module, wherein initialization
The change amount signal of signal end is greater than zero and is less than or equal to the data-signal variable quantity of data signal end, so that drive module
Control terminal not only has received data-signal, also has received the change amount signal at initializing signal end, to increase drive module
Control terminal voltage change range, and then improve the brightness regulation range of luminescent device, expand application scenarios range.
Detailed description of the invention
Fig. 1 to Fig. 3 is respectively the structural schematic diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 4 and Fig. 5 is respectively the flow chart of the driving method of pixel circuit provided in an embodiment of the present invention；
Fig. 6 is the working timing figure of pixel circuit shown in Fig. 2 provided in an embodiment of the present invention；
Fig. 7 is the working timing figure of pixel circuit shown in Fig. 3 provided in an embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawing, to pixel circuit provided in an embodiment of the present invention, its driving method and organic light emitting display face
Plate, display device specific embodiment be described in detail.It should be noted that this specification described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's all other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
A kind of pixel circuit provided in an embodiment of the present invention, as shown in Figure 1 to Figure 3, comprising: Data write. module 101, number
According to adjustment module 102, drive module 103, light emitting control module 104 and luminescent device OLED；
First control terminal of Data write. module 101 is connected with the first scanning signal end Rowsel_A, the second control terminal with
Second scanning signal end Rowsel_B is connected, and input terminal is connected with data signal end Data, and output end is connected with first node Q1；
Data write. module 101 is used for the co- controlling in the first scanning signal end Rowsel_A and the second scanning signal end Rowsel_B
Under, the data-signal of data signal end Data is supplied to first node Q1；
The control terminal of data conditioning module 102 is connected with voltage control signal end S, input terminal and initializing signal end Init
It is connected, output end is connected with first node Q1；Data conditioning module 102 is used under the control of voltage control signal end S, will be first
The change amount signal of beginningization signal end Init is supplied to first node Q1, wherein the change amount signal of initializing signal end Init
Data-signal variable quantity greater than zero and less than or equal to data signal end Data；
The control terminal of drive module 103 is connected with first node Q1, and input terminal is connected with the first power end VDD, output end
It is connected with second node Q2；The control terminal of light emitting control module 104 is connected with LED control signal end Emission, input terminal with
Second node Q2 is connected, and output end is connected with third node Q3；One end of luminescent device OLED is connected with third node Q3, another
End is connected with second source end VSS；Drive module 103 is used to drive luminescent device by the light emitting control module 104 of conducting
OLED shines.
In above-mentioned pixel circuit provided in an embodiment of the present invention, pass through Data write. module 101 and data conditioning module
102 are supplied to the change amount signal of data-signal and initializing signal end Init the control terminal of drive module 103, wherein just
The change amount signal of beginningization signal end Init is greater than zero and is less than or equal to the data-signal variable quantity of data signal end, so that driving
The control terminal of dynamic model block 103 not only has received data-signal, also has received the change amount signal of initializing signal end Init, thus
The voltage change range of the control terminal of drive module 103 is increased, and then improves the brightness regulation range of luminescent device OLED,
Expand application scenarios range.
It should be noted that in above-mentioned pixel circuit provided in an embodiment of the present invention, the signal electricity of the first power end VDD
Pressure is generally high voltage, and the signal voltage of second source end VSS is generally low-voltage or ground connection.In practical applications, the first electricity
The voltage needs of the signal of source VDD and second source end VSS design determination according to actual application environment, do not limit herein
It is fixed.
Combined with specific embodiments below, the present invention is described in detail.It should be noted that the present embodiment is in order to more
The good explanation present invention, but do not limit the present invention.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in Figures 2 and 3, data are write
Enter module 101, may include: first switch transistor T1 and second switch transistor T2；
The grid of first switch transistor T1 is connected with the first scanning signal end Rowsel_A, source electrode and data signal end
Data is connected, and drain electrode is connected with first node Q1；
The grid of second switch transistor T2 is connected with the second scanning signal end Rowsel_B, drain electrode and data signal end
Data is connected, and source electrode is connected with first node Q1.
Specifically, in above-mentioned pixel circuit provided in an embodiment of the present invention, first switch transistor T1 is in the first scanning
It is connected under the control of signal end Rowsel_A, while second switch transistor T2 is in the control of the second scanning signal end Rowsel_B
Lower conducting, first switch transistor T1 and second switch transistor T2 of the data-signal U0 of data signal end Data through being connected write
Enter the grid that first node Q1 drives transistor D.The variable quantity of restricted degree system, data-signal U0 is Δ U, thus leads to grid
The adjustable range of the grid voltage of gated transistors D is limited.
The above is only the specific structures for illustrating Data write. module 101 in pixel circuit, in the specific implementation, data
The specific structure of writing module 101 is not limited to above structure provided in an embodiment of the present invention, can also be those skilled in the art
For example individual switching transistor of known other structures, it is not limited here.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in Fig. 2, data adjust mould
Block 102, comprising: the 4th switching transistor T4 and capacitor C；
The grid of 4th switching transistor T4 is connected with voltage control signal end S, drain electrode and initializing signal end Init phase
Even, source electrode is connected with one end of capacitor C, and the other end of capacitor C is connected with first node Q1.
Specifically, in above-mentioned pixel circuit provided in an embodiment of the present invention, in data write phase, the 4th switch crystal
Pipe T4 is connected under voltage control signal end S control, and initializing signal end Init exports the first signal N1 the 4th opening through being connected
It closes transistor T4 and capacitor C is written, so that the upper end voltage initialization of capacitor C is N1.Stage, the 4th switch are adjusted in data area
Transistor T4 is connected under voltage control signal end S control, and initializing signal end Init exports second signal N2, and second at this time
Capacitor C is written in the 4th switching transistor T4 of the signal N2 through being connected, since the total electrical charge of capacitor C remains unchanged, at this time under capacitor C
The knots modification for holding voltage is N2-N1, i.e. the voltage knots modification of first node Q1 (grid of driving transistor D) is N2-N1, and the
The voltage of one node Q1 (grid of driving transistor D) is U0+N2-N1, wherein 0 < N2-N1 < Δ U, to increase driving
The adjustable range of the grid voltage of transistor D, and then the brightness regulation range of luminescent device OLED can be increased.
Specifically, in above-mentioned pixel circuit provided in an embodiment of the present invention, the embodiment of the invention also provides another kinds
The implementation of data conditioning module 102, as shown in figure 5, the control terminal of data conditioning module 102 includes the first control terminal and the
Two control terminals, input terminal include first input end and the second input terminal, and output end includes the first output end and second output terminal, electricity
Pressing control signal end S includes first voltage control signal end S1 and second voltage control signal end S2, initializing signal end Init
It include the first child node Q1 ' including the first initializing signal end Init1 and the second initializing signal end Init2, first node Q1
With the second child node Q1 "；And first control terminal be connected with first voltage control signal end S1, the second control terminal and second voltage control
Signal end S2 processed is connected, and first input end is connected with the first initializing signal end Init1, and the second input terminal and the second initialization are believed
Number end Init2 is connected, and the first output end is connected with the first child node Q1 ', and second output terminal is connected with the second child node Q1 ", several
It is connected according to the output end of writing module 101 with the first child node Q1 ', the control terminal of drive module 103 and the second child node Q1 " phase
Even；Data conditioning module 102, comprising: the 4th switching transistor T4, the 5th switching transistor T5 and capacitor C；
The grid of 4th switching transistor T4 is connected with first voltage control signal end S1, drain electrode and the first initializing signal
Init1 is held to be connected, source electrode is connected with the first child node Q1 '；
The grid of 5th switching transistor T5 is connected with second voltage control signal end S2, drain electrode and the second initializing signal
Init2 is held to be connected, source electrode is connected with the second child node Q1 "；
One end of capacitor C is connected with the first child node Q1 ', and the other end is connected with the second child node Q1 ".
Specifically, in pixel circuit provided in an embodiment of the present invention, the 4th switching transistor T4 is controlled in first voltage
It is connected under the control of signal end S1, fourth switch of the first signal N1 of the first initializing signal end Init1 output through being connected is brilliant
The first child node Q1 ' is written in body pipe T4；At the same time, control of the 5th switching transistor T5 in second voltage control signal end S2
Lower conducting, fiveth switching transistor T5 write-in second of the second signal N2 of the second initializing signal end Init2 output through being connected
Child node Q1 ".When the first child node Q1 ' is written in subsequent data signal U0, since the total electrical charge of capacitor C remains unchanged, second
The voltage of child node Q1 " (grid of driving transistor D) becomes U0+N2-N1, and 0 < N2-N1 < Δ U, so that driving
The adjustable range of the grid voltage of transistor D increases, and then can increase the brightness regulation range of luminescent device OLED.
The above is only the specific structures for illustrating data conditioning module 102 in pixel circuit, in the specific implementation, data
The specific structure of adjustment module 102 is not limited to above structure provided in an embodiment of the present invention, can also be those skilled in the art
Known other structures, it is not limited here.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in Figures 2 and 3, mould is driven
Block 103, comprising: driving transistor D；Light emitting control module 104, comprising: third switching transistor T3；
The grid of driving transistor D is connected with first node Q1, and source electrode is connected with the first power end VDD, drain electrode and second
Node Q2 is connected；
The grid of third switching transistor T3 is connected with LED control signal end Emission, drain electrode and second node Q2 phase
Even, source electrode is connected with third node Q3.
Specifically, in above-mentioned pixel circuit provided in an embodiment of the present invention, third transistor T3 is in LED control signal
Under the control for holding Emission, second node Q2 is connected with third node Q3；Drive transistor D in write-in first node Q1 number
It is believed that passing through the third transistor of conducting under the co- controlling of the change amount signal N2-N1 of number U0 and initializing signal end Init
The signal of first power end VDD is exported to third node Q3, luminescent device OLED is driven to shine by T3.
The above is only the specific structures for illustrating drive module 103 and light emitting control module 104 in pixel circuit, are having
When body is implemented, the specific structure of drive module 103 and light emitting control module 104 is not limited to above-mentioned knot provided in an embodiment of the present invention
Structure, can also be skilled person will appreciate that other structures, it is not limited here.
It should be noted that first switch transistor T1, the second switch transistor mentioned in the above embodiment of the present invention
T2, third switching transistor T3, the 4th switching transistor T4, the 5th switching transistor T5 and the source electrode and the leakage that drive transistor D
Pole can be interchanged according to transistor types and the difference of input signal, function, not do specific differentiation herein.
Generally, when first switch transistor T1, second switch transistor T2, third switching transistor T3, the 4th switch
When transistor T4, the 5th switching transistor T5 and driving transistor D are P-type transistor, source electrode is input terminal, is drained as output
End；As first switch transistor T1, second switch transistor T2, third switching transistor T3, the 4th switching transistor T4, the 5th
Switching transistor T5 and driving transistor D be when being N-type transistor, drains as input terminal, source electrode is output end.
Also, in above-mentioned pixel circuit provided in an embodiment of the present invention, in order to make the adjustable range of data-signal U0 compared with
Greatly, preferably, first switch transistor T1 is different from the type of second switch transistor T2, i.e. first switch transistor T1 is P
Transistor npn npn and second switch transistor T2 are N-type transistor or first switch transistor T1 is N-type transistor and second opens
Pass transistor T2 is P-type transistor.Further, third switching transistor T3, the 4th switching transistor T4, the 5th switch crystal
The type of pipe T5 and driving transistor D can be configured according to actual needs, it is not limited here.
Based on the same inventive concept, the embodiment of the invention provides the driving methods of above-mentioned pixel circuit, due to the driving
The principle that method solves the problems, such as is similar to the principle that above-mentioned pixel circuit solves the problems, such as, therefore, provided in an embodiment of the present invention to be somebody's turn to do
The implementation of driving method may refer to the implementation of above-mentioned pixel circuit provided in an embodiment of the present invention, and overlaps will not be repeated.
It specifically, in practical application, can be by specific implementation following but not limited to the following to of the invention real
The above-mentioned pixel circuit for applying example offer is driven.
Specifically, as shown in figure 4, being a kind of possible driving method of pixel circuit provided in an embodiment of the present invention, tool
Body may comprise steps of:
401, data write phase, common control of the Data write. module at the first scanning signal end and the second scanning signal end
Under system, the data-signal of data signal end is supplied to first node；Control of the data conditioning module at voltage control signal end
Under, the first signal of storing initial signal end output；
402, data area adjusts the stage, and data conditioning module is under the control at voltage control signal end, storing initial
The second signal of signal end output, and the difference of second signal and the first signal is supplied to first node, wherein second signal
It is greater than zero with the difference of the first signal and is less than or equal to the data-signal variable quantity of data signal end；
403, light emitting phase, light emitting control module is under the control at LED control signal end, by second node and third section
Point conducting；Drive module is defeated by the signal of the first power end by the light emitting control module of conducting under the control of first node
Out to third node, luminescent device is driven to shine.
Specifically, as shown in figure 5, being the alternatively possible driving method of pixel circuit provided in an embodiment of the present invention,
It can specifically include following steps:
501, initial phase, for data conditioning module under the control of first voltage control signal end, storage first is initial
Change the first signal of signal end output；And under the control of second voltage control signal end, the second initializing signal end of storage is defeated
Second signal out；
502, data area adjusts the stage, and Data write. module is total to the first scanning signal end and the second scanning signal end
With under control, the data-signal of data signal end is supplied to the first child node；Data conditioning module is by second signal and first
The sum of the difference of signal and the data-signal of data signal end are supplied to the second child node, wherein second signal and the first signal
Difference be greater than zero and be less than or equal to data signal end data-signal variable quantity；
503, light emitting phase, light emitting control module is under the control at LED control signal end, by second node and third section
Point conducting；Drive module is under the control of the second child node, by the light emitting control module of conducting, by the signal of the first power end
Output drives luminescent device to shine to third node.
Technical solution for a better understanding of the present invention below proposes the embodiment of the present invention with two specific embodiments
The course of work of the pixel circuit of confession is described.
Embodiment one
Fig. 2 is the structural schematic diagram for the pixel circuit that the embodiment of the present invention one provides.In pixel circuit shown in Fig. 2,
First switch transistor T1, third switching transistor T3 and the 4th switching transistor T4 are N-type transistor, second switch crystal
Pipe T2 and driving transistor D is P-type transistor；Wherein, each N-type transistor is connected under high level effect, makees in low level
With lower cut-off；Each P-type transistor is connected under low level effect, ends under high level effect.The corresponding work of the pixel circuit
Making timing diagram is specifically, to select data write phase t1, the data area tune in working timing figure shown in fig. 6 shown in Fig. 6
It is described in detail for section stage t2 and light emitting phase t3.
Data write phase t1: voltage control signal end S output high level, the first scanning signal end Rowsel_A output are high
Level, the second scanning signal end Rowsel_B export low level, and LED control signal end Emission exports low level.
First switch transistor T1, second switch transistor T2 and the 4th switching transistor T4 are in the conductive state, third
Switching transistor T3 is in off state.The first switch transistor T1 that the data-signal U0 of data signal end Data passes through conducting
It exports with second switch transistor T2 to first node Q1, i.e. the lower end voltage initialization of capacitor C is U0, driving transistor D's
Grid voltage is U0, and restricted degree system, the variable quantity of data-signal U0 are Δ U；The first of initializing signal end Init output
Capacitor C is written in the 4th switching transistor T4 of the signal N1 through being connected, so that the upper end voltage initialization of capacitor C is N1.
Data area adjusts stage t2: voltage control signal end S output high level, and the first scanning signal end Rowsel_A is defeated
Low level out, the second scanning signal end Rowsel_B export high level, and LED control signal end Emission exports low level.
4th switching transistor T4 is in the conductive state, first switch transistor T1, second switch transistor T2 and third
Switching transistor T3 is in off state.Initializing signal end Init exports second signal N2, and second signal N2 is connected
Capacitor C is written in 4th switching transistor T4, and the upper end voltage change of capacitor C is N2 at this time, since the total electrical charge of capacitor C is kept not
Become, so that the voltage change of the lower end capacitor C (first node Q1) is U0+N2-N1, the grid voltage of driving transistor D is changed into
U0+N2-N1, and 0 < N2-N1 < Δ U to increase the grid voltage variation range of driving transistor D, and then can increase hair
The brightness regulation range of optical device OLED.
Light emitting phase t3: voltage control signal end S output low level, the first scanning signal end Rowsel_A export low electricity
Flat, the second scanning signal end Rowsel_B exports high level, and LED control signal end Emission exports high level.
Third switching transistor T3 is in the conductive state, first switch transistor T1, second switch transistor T2 and the 4th
Switching transistor T4 is in off state.Driving transistor D is opened under the control of voltage U0+N2-N1, and passes through the of conducting
Three switching transistor T3 export the signal Vdd of the first power end VDD to the anode of luminescent device OLED, to drive luminescent device
OLED shines.Specifically, the operating current of luminescent device OLED is as follows:
Wherein, K is constant related with the technological parameter of driving transistor D and geometric dimension, VGSFor driving transistor D's
Voltage difference between grid and source electrode.
In subsequent period of time, pixel circuit will repeat the course of work of above-mentioned t1-t3.
Seen from the above description, in example 1, by the collective effect of the 4th switching transistor T4 and capacitor C, make
The grid voltage variation range of transistor D must be driven to increase, to improve the adjusting model of the operating current of luminescent device OLED
It encloses, the brightness regulation range of corresponding luminescent device OLED increases, and expands application scenarios range.
Embodiment two
Fig. 3 is the structural schematic diagram of pixel circuit provided by Embodiment 2 of the present invention.In pixel circuit shown in Fig. 3,
First switch transistor T1, third switching transistor T3, the 4th switching transistor T4 and the 5th switching transistor T5 are N-type crystalline substance
Body pipe, second switch transistor T2 and driving transistor D are P-type transistor；Wherein, each N-type transistor is acted in high level
Lower conducting ends under low level effect；Each P-type transistor is connected under low level effect, ends under high level effect.It should
The corresponding working timing figure of pixel circuit is specifically, to select the initialization rank in working timing figure shown in Fig. 7 shown in Fig. 7
Section t1, data area are described in detail for adjusting stage t2 and light emitting phase t3.
Initial phase t1: first voltage control signal end S1 output high level, second voltage control signal end S2 output
High level, the first scanning signal end Rowsel_A export low level, and the second scanning signal end Rowsel_B exports high level, shine
Control signal end Emission exports low level.
4th switching transistor T4 and the 5th switching transistor T5 are in the conductive state, first switch transistor T1, second
Switching transistor T2 and third switching transistor T3 is in off state.First letter of the first initializing signal end Init1 output
The first child node Q1 ' is written in the 4th switching transistor T4 of number N1 through being connected；The second of second initializing signal end Init2 output
The second child node Q1 " is written in the 5th switching transistor T5 of the signal N2 through being connected.
Data area adjusts stage t2: first voltage control signal end S1 output low level, second voltage control signal end
S2 exports low level, and the first scanning signal end Rowsel_A exports high level, and the second scanning signal end Rowsel_B exports low electricity
Flat, LED control signal end Emission exports low level.
First switch transistor T1 and second switch transistor T2 are in the conductive state, third switching transistor T3, the 4th
Switching transistor T4 and the 5th switching transistor T5 are in off state.The data-signal U0 of data signal end Data passes through conducting
First switch transistor T1 and second switch transistor T2 export to the first child node Q1 ', due to capacitor C total electrical charge keep
Constant, the voltage of the second child node Q1 " (grid of driving transistor D) becomes U0+N2-N1, and 0 < N2-N1 < Δ U, thus
So that the adjustable range of the grid voltage of driving transistor D increases.
Light emitting phase t3: first voltage control signal end S1 output low level, second voltage control signal end S2 output are low
Level, the first scanning signal end Rowsel_A export low level, and the second scanning signal end Rowsel_B exports high level, and shine control
Signal end Emission processed exports high level.
Third switching transistor T3 is in the conductive state, and first switch transistor T1, second switch transistor T2, the 4th open
It closes transistor T4 and the 5th switching transistor T5 and is in off state.Driving transistor D is opened under the control of voltage U0+N2-N1
It opens, and the third switching transistor T3 by being connected exports the signal Vdd of the first power end VDD to the sun of luminescent device OLED
Pole, to drive luminescent device OLED to shine.Specifically, the operating current of luminescent device OLED is as follows:
Wherein, K is constant related with the technological parameter of driving transistor D and geometric dimension, VGSFor driving transistor D's
Voltage difference between grid and source electrode.
In subsequent period of time, pixel circuit will repeat the course of work of above-mentioned t1-t3.
Seen from the above description, in example 2, pass through the 4th switching transistor T4, the 5th switching transistor T5 and electricity
Hold the collective effect of C, so that the grid voltage variation range of driving transistor D increases, to improve luminescent device OLED's
The brightness regulation range of the adjustable range of operating current, corresponding luminescent device OLED increases, and expands application scenarios range.
Based on the same inventive concept, the embodiment of the invention provides a kind of organic light emitting display panels, including above-mentioned pixel
Circuit, since the principle that the organic light emitting display panel solves the problems, such as is similar to the principle that above-mentioned pixel circuit solves the problems, such as, because
This, the implementation of the organic light emitting display panel provided in an embodiment of the present invention may refer to above-mentioned picture provided in an embodiment of the present invention
The implementation of plain circuit, overlaps will not be repeated.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display devices, including the embodiment of the present invention to mention
The above-mentioned organic light emitting display panel supplied, the display device can be with are as follows: mobile phone, tablet computer, television set, display, notebook
Any product having a display function such as computer, digital camera, navigator, smartwatch, body building wrist strap, personal digital assistant or
Component.Other essential component parts for display device are it will be apparent to an ordinarily skilled person in the art that having
, this will not be repeated here, also should not be taken as limiting the invention.The implementation of the display device may refer to above-mentioned organic light emission
The embodiment of display panel, overlaps will not be repeated.
Above-mentioned pixel circuit provided in an embodiment of the present invention, its driving method and organic light emitting display panel, display device,
The pixel circuit includes: Data write. module, data conditioning module, drive module, light emitting control module and luminescent device；Data
First control terminal of writing module is connected with the first scanning signal end, and the second control terminal is connected with the second scanning signal end, input
End is connected with data signal end, and output end is connected with first node；Data write. module is used at the first scanning signal end and the
Under the co- controlling at two scanning signal ends, the data-signal of data signal end is supplied to first node；Data conditioning module
Control terminal is connected with voltage control signal end, and input terminal is connected with initializing signal end, and output end is connected with first node；Data
Adjustment module is used under the control at voltage control signal end, and the change amount signal at initializing signal end is supplied to first segment
Point, wherein the change amount signal at initializing signal end is greater than zero and is less than or equal to the data-signal variable quantity of data signal end；
The control terminal of drive module is connected with first node, and input terminal is connected with the first power end, and output end is connected with second node；Hair
The control terminal of photocontrol module is connected with LED control signal end, and input terminal is connected with second node, output end and third node
It is connected；One end of luminescent device is connected with third node, and the other end is connected with second source end；Drive module is for passing through conducting
Light emitting control module drive luminescent device shine.As can be seen that in embodiments of the present invention, passing through Data write. module sum number
The change amount signal of data-signal and initializing signal end is supplied to the control terminal of drive module according to adjustment module, wherein just
The change amount signal of beginningization signal end is greater than zero and is less than or equal to the data-signal variable quantity of data signal end, so that driving mould
The control terminal of block not only has received data-signal, also has received the change amount signal at initializing signal end, to increase driving
The voltage change range of the control terminal of module, and then the brightness regulation range of luminescent device is improved, expand application scenarios model
It encloses.
It should be noted that, in this document, such as first and second etc relational terms are used merely to an entity
Or operation is distinguished with another entity or operation, is appointed without necessarily requiring or implying existing between these entities or operation
What this actual relationship or sequence.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of pixel circuit characterized by comprising Data write. module, data conditioning module, drive module, shine control
Molding block and luminescent device；
First control terminal of the Data write. module is connected with the first scanning signal end, the second control terminal and the second scanning signal
End is connected, and input terminal is connected with data signal end, and output end is connected with first node；The Data write. module is used for described
Under the co- controlling at the first scanning signal end and second scanning signal end, the data-signal of the data signal end is provided
To the first node；
The control terminal of the data conditioning module is connected with voltage control signal end, and input terminal is connected with initializing signal end, defeated
Outlet is connected with the first node；The data conditioning module is used under the control at the voltage control signal end, by institute
The change amount signal for stating initializing signal end is supplied to the first node, wherein the signal intensity at the initializing signal end
Amount is greater than zero and is less than or equal to the data-signal variable quantity of the data signal end；
The control terminal of the drive module is connected with the first node, and input terminal is connected with the first power end, output end and
Two nodes are connected；The control terminal of the light emitting control module is connected with LED control signal end, input terminal and the second node
It is connected, output end is connected with third node；One end of the luminescent device is connected with the third node, the other end and the second electricity
Source is connected；The drive module is used for luminescent device described in the light emitting control module drive by conducting and shines.
2. pixel circuit as described in claim 1, which is characterized in that the Data write. module, comprising: first switch crystal
Pipe and second switch transistor；
The grid of the first switch transistor is connected with first scanning signal end, source electrode and the data signal end phase
Even, drain electrode is connected with the first node；
The grid of the second switch transistor is connected with second scanning signal end, drain electrode and the data signal end phase
Even, source electrode is connected with the first node.
3. pixel circuit as described in claim 1, which is characterized in that the drive module, comprising: driving transistor；
The grid of the driving transistor is connected with the first node, and source electrode is connected with first power end, drain electrode and institute
Second node is stated to be connected.
4. pixel circuit as described in claim 1, which is characterized in that the light emitting control module, comprising: third switchs crystal
Pipe；
The grid of the third switching transistor is connected with the LED control signal end, and drain electrode is connected with the second node,
Source electrode is connected with the third node.
5. pixel circuit according to any one of claims 1-4, which is characterized in that the data conditioning module, comprising: the 4th
Switching transistor and capacitor；
The grid of 4th switching transistor is connected with the voltage control signal end, drain electrode and initializing signal end phase
Even, source electrode is connected with one end of the capacitor, and the other end of the capacitor is connected with the first node.
6. pixel circuit according to any one of claims 1-4, which is characterized in that the control terminal packet of the data conditioning module
The first control terminal and the second control terminal are included, input terminal includes first input end and the second input terminal, and output end includes the first output
End and second output terminal, the voltage control signal end include first voltage control signal end and second voltage control signal end,
The initializing signal end includes the first initializing signal end and the second initializing signal end, and the first node includes the first son
Node and the second child node；And first control terminal is connected with the first voltage control signal end, second control terminal
It is connected with the second voltage control signal end, the first input end is connected with first initializing signal end, and described
Two input terminals are connected with second initializing signal end, and first output end is connected with first child node, and described
Two output ends are connected with second child node, and the output end of the Data write. module is connected with first child node, institute
The control terminal for stating drive module is connected with second child node；The data conditioning module, comprising: the 4th switching transistor,
5th switching transistor and capacitor；
The grid of 4th switching transistor is connected with the first voltage control signal end, drain electrode and first initialization
Signal end is connected, and source electrode is connected with first child node；
The grid of 5th switching transistor is connected with the second voltage control signal end, drain electrode and second initialization
Signal end is connected, and source electrode is connected with second child node；
One end of the capacitor is connected with first child node, and the other end is connected with second child node.
7. a kind of organic light emitting display panel characterized by comprising pixel circuit as claimed in any one of claims 1 to 6.
8. a kind of display device characterized by comprising organic light emitting display panel as claimed in claim 7.
9. a kind of driving method of pixel circuit as claimed in claim 5 characterized by comprising
Data write phase, Data write. module, will under the co- controlling at the first scanning signal end and the second scanning signal end
The data-signal of data signal end is supplied to the first node；Data conditioning module under the control at voltage control signal end,
First signal of storing initial signal end output；
Data area adjusts the stage, and the data conditioning module stores the initialization under the control at voltage control signal end
The second signal of signal end output, and the difference of the second signal and first signal is supplied to the first node,
Wherein, the second signal and the difference of first signal are greater than zero and are less than or equal to the data letter of the data signal end
Number variable quantity；
Light emitting phase, light emitting control module is under the control at LED control signal end, by the second node and the third section
Point conducting；The drive module is under the control of the first node, by the light emitting control module of conducting, by the first electricity
The signal of source is exported to the third node, and the luminescent device is driven to shine.
10. a kind of driving method of pixel circuit as claimed in claim 6 characterized by comprising
Initial phase, data conditioning module store the first initializing signal end under the control of first voltage control signal end
First signal of output；And under the control of second voltage control signal end, the second of the output of the second initializing signal end of storage
Signal；
Data area adjusts stage, co- controlling of the Data write. module at the first scanning signal end and the second scanning signal end
Under, the data-signal of data signal end is supplied to the first child node；The data conditioning module is by the second signal and institute
The sum of the data-signal of the difference and the data signal end of stating the first signal is supplied to the second child node, wherein described second
The difference of signal and first signal is greater than zero and is less than or equal to the data-signal variable quantity of the data signal end；
Light emitting phase, light emitting control module is under the control at LED control signal end, by the second node and the third section
Point conducting；The drive module is under the control of second child node, by the light emitting control module of conducting, by first
The signal of power end is exported to the third node, and the luminescent device is driven to shine.
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| CN111028786A (en) * | 2019-12-31 | 2020-04-17 | 上海视欧光电科技有限公司 | Pixel driving circuit, driving method thereof, display panel and display device |
| CN112201200A (en) * | 2020-10-26 | 2021-01-08 | Tcl华星光电技术有限公司 | Pixel driving circuit and display device |
| CN114120874A (en) * | 2021-11-24 | 2022-03-01 | Tcl华星光电技术有限公司 | Light emitting device driving circuit, backlight module and display panel |
| CN114120883B (en) * | 2022-01-27 | 2022-05-24 | 深圳晶微峰光电科技有限公司 | Pixel circuit, display device, and display control method for pixel circuit |
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| JP5141277B2 (en) * | 2008-02-08 | 2013-02-13 | ソニー株式会社 | Lighting period setting method, display panel driving method, backlight driving method, lighting period setting device, semiconductor device, display panel, and electronic apparatus |
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