CN108230982A - Pixel-driving circuit and method, display panel - Google Patents
Pixel-driving circuit and method, display panel Download PDFInfo
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- CN108230982A CN108230982A CN201810054208.XA CN201810054208A CN108230982A CN 108230982 A CN108230982 A CN 108230982A CN 201810054208 A CN201810054208 A CN 201810054208A CN 108230982 A CN108230982 A CN 108230982A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
Abstract
This disclosure relates to display technology field more particularly to a kind of pixel-driving circuit and image element driving method, display panel.The pixel-driving circuit can include：Switch unit, driving unit, isolated location, compensating unit and energy-storage units, wherein, the switch unit is identical with the conduction level phase of the compensating unit, and the conduction level phase of the isolated location and the switch unit and the compensating unit differs.The disclosure reduces the quantity of scan line, and then eliminate EOA frameworks, saves frame, reduce energy consumption on the basis of the normal output of pixel-driving circuit is ensured, while also is able to simplify preparation process, so as to reduce cost.
Description
Technical field
This disclosure relates to display technology field more particularly to a kind of pixel-driving circuit and image element driving method, display surface
Plate.
Background technology
With the development of optical technology and semiconductor technology, with liquid crystal display (Liquid CrystalDisplay,
LCD) and organic light emitting diode display (Organic Light Emitting Diode, OLED) be representative FPD
Utensil has the features such as frivolous, low energy consumption, reaction speed is fast, excitation purity is good and contrast is high, is occupied in display field leading
Status.In recent years, in order to reduce manufacture cost, narrow frame is designed to for inexorable trend.
In the design of narrow frame is realized at present, different scanning signals needs cabling respectively in pixel-driving circuit, because
And need the different scanning of two kinds of framework offers of GOA (Gate Driver on Array, array substrate row actuation techniques) and EOA
Signal.
Clearly as different scanning signals needs cabling, and there are two kinds of frameworks of GOA and EOA respectively, cause frame and
Input signal is more, and power consumption is larger.
It should be noted that information is only used for strengthening the reason to the background of the disclosure disclosed in above-mentioned background technology part
Solution, therefore can include not forming the information to the prior art known to persons of ordinary skill in the art.
Invention content
The disclosure is designed to provide a kind of pixel-driving circuit and image element driving method, display panel, and then solve
Border structure and input signal are more and the problem of power consumption is larger.
According to one aspect of the disclosure, a kind of pixel-driving circuit is provided, for driving electroluminescent cell, including：
Switch unit is connected for responding the first scanning signal, by data signal transmission to first node；
Driving unit is connected, and the effect of the signal in the first node is defeated for the signal in response to second node
Go out driving current；
Isolated location is connected for responding first scanning signal, and power supply signal is transmitted to first node, and will
Third node is connected with the first pole of the electroluminescent cell；
Compensating unit is connected for responding first scanning signal, and the data-signal and thermal compensation signal are written
The second node；
Energy-storage units, for storing the data-signal and the thermal compensation signal；
Wherein, the switch unit is identical with the conduction level phase of the compensating unit, the isolated location with it is described
The conduction level phase of switch unit and the compensating unit differs.
In a kind of exemplary embodiment of the disclosure, the circuit further includes：
First reset unit is connected for responding the second scanning signal, and reset signal is transmitted to second section
Point.
In a kind of exemplary embodiment of the disclosure, the circuit further includes：
Second reset unit is connected for responding first scanning signal, the reset signal is transmitted to institute
The first pole of electroluminescent cell is stated, wherein, second reset unit is identical with the conduction level phase of the switch unit.
In a kind of exemplary embodiment of the disclosure,
The switch unit includes：
First switching element, control terminal receive first scanning signal, and first end connects the first node, second end
Receive the data-signal；
The driving unit includes：
Driving transistor, control terminal connects the second node, first end connects the third node, second end connection institute
State first node；
The isolated location includes：
Second switch element, control terminal receive first scanning signal, and first end connects the first node, second end
Receive the power supply signal；
Third switch element, control terminal receive first scanning signal, and first end connects the electroluminescent cell
First pole, second end connect the third node；
The compensating unit includes：
4th switch element, control terminal receive first scanning signal, and first end connects the second node, second end
Connect the third node；
The energy-storage units include：
Storage capacitance, first end receive the power supply signal, and second end connects the second node.
In a kind of exemplary embodiment of the disclosure, first reset unit includes：
5th switch element, control terminal receive second scanning signal, and first end connects the second node, second end
Receive the reset signal.
In a kind of exemplary embodiment of the disclosure, second reset unit includes：
6th switch element, control terminal receive first scanning signal, and first end connects the electroluminescent cell
First pole, second end receive the reset signal.
According to one aspect of the disclosure, a kind of image element driving method is provided, for driving described in above-mentioned any one
Pixel-driving circuit, the image element driving method include：
In compensated stage, switch unit and compensating unit is connected using the first scanning signal, so that data signal transmission is extremely
First node, and charge the data-signal and thermal compensation signal write-in second node and to energy-storage units；
In glow phase, isolated location is connected using first scanning signal, so that driving unit is in second node
It is connected under the action of signal, and the output driving current under the action of power supply signal, the electroluminescent cell to be driven to shine.
In a kind of exemplary embodiment of the disclosure, the pixel-driving circuit further includes the first reset unit, is used for
It responds the second scanning signal and is connected, reset signal is transmitted to the second node；The image element driving method further includes：
In reseting stage, first reset unit is connected using the second scanning signal, the reset signal is transmitted to
The second node, to be resetted to the second node.
In a kind of exemplary embodiment of the disclosure, the pixel-driving circuit further includes the second reset unit, is used for
It responds first scanning signal and is connected, the reset signal is transmitted to the first pole of the electroluminescent cell；Institute
Image element driving method is stated to further include：
In the compensated stage, second reset unit is connected using first scanning signal, reset signal is passed
The first pole of the electroluminescent cell is transported to, is resetted with the first pole to the electroluminescent cell.
According to one aspect of the disclosure, a kind of display panel is provided, including display area and neighboring area, the display
Region includes the pixel-driving circuit described in above-mentioned any one.
A kind of pixel-driving circuit and image element driving method, display panel that a kind of exemplary embodiment of the disclosure provides,
The pixel-driving circuit includes：Switch unit, driving unit, isolated location, compensating unit, energy-storage units, wherein, switch unit
Identical with the conduction level phase of compensating unit, the conduction level phase of isolated location and the switch unit and compensating unit is equal
It differs.In the course of work of the pixel circuit, since switch unit is identical with the conduction level phase of compensating unit, isolation
The conduction level phase of unit and switch unit and compensating unit differs, and therefore, in compensated stage, is believed by the first scanning
Number conducting switch unit and compensating unit, turns off isolated location, data-signal and thermal compensation signal is written second node, and
In glow phase, switch unit and compensating unit are turned off by the first scanning signal, isolated location is connected, so that driving unit
It is connected under the action of the signal of second node, the output driving current under the action of power supply signal.In conclusion above-mentioned pixel
Driving circuit only only used a scanning signal (the first scanning signal), i.e., with only a scan line, you can ensure
The normal output of pixel-driving circuit compared with the prior art, reduces the quantity of scan line, and then eliminates EOA frameworks, section
Frame is saved, and due to only used a scanning signal, i.e. the first scanning signal, compared with the prior art, reduced scanning
The quantity of signal, and then reduce energy consumption, while also be able to simplify preparation process, so as to reduce cost.
Description of the drawings
It is described in detail its exemplary embodiment by referring to accompanying drawing, the above and other feature and advantage of the disclosure will become
It obtains more obvious.It should be evident that the accompanying drawings in the following description is only some embodiments of the present disclosure, it is common for this field
For technical staff, without creative efforts, other attached drawings are can also be obtained according to these attached drawings.Attached
In figure：
Fig. 1 is the schematic diagram of the pixel-driving circuit in one the relevant technologies of the disclosure；
Fig. 2 is the working timing figure of the pixel-driving circuit in one the relevant technologies of the disclosure；
Fig. 3 is the schematic diagram one of pixel-driving circuit provided in one exemplary embodiment of the disclosure；
Fig. 4 is the schematic diagram two of pixel-driving circuit provided in one exemplary embodiment of the disclosure；
Fig. 5 is the schematic diagram three of pixel-driving circuit provided in one exemplary embodiment of the disclosure；
Fig. 6 is the working timing figure of pixel-driving circuit provided in one exemplary embodiment of the disclosure.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be real in a variety of forms
It applies, and is not understood as limited to embodiment set forth herein；On the contrary, these embodiments are provided so that the disclosure will be comprehensively and complete
It is whole, and the design of example embodiment is comprehensively communicated to those skilled in the art.Described feature, structure or characteristic can
To be incorporated in any suitable manner in one or more embodiments.In the following description, provide many details from
And it provides and embodiment of the disclosure is fully understood.It it will be appreciated, however, by one skilled in the art that can be of the disclosure
Technical solution is without one or more in the specific detail or other methods, constituent element, material, dress may be used
It puts, step etc..In other cases, known solution is not shown in detail or describes to avoid fuzzy all aspects of this disclosure.
In addition, attached drawing is only the schematic illustrations of the disclosure, not necessarily it is drawn to scale.Identical attached drawing in figure
Label identifies the same or similar part, thus will omit repetition thereof.
Fig. 1 shows the pixel-driving circuit in a kind of the relevant technologies, and the switch element in the pixel-driving circuit is N
Transistor npn npn or P-type transistor.As shown in Figure 1, the pixel-driving circuit can include：Switch unit 10, driving unit 20, every
From unit 30, compensating unit 40, energy-storage units 50, the first reset unit 60 and the second reset unit 70, wherein, switch unit
10 include first switching element T1, and driving unit 20 includes driving transistor DT, isolated location 30 includes second switch element T2
And third switch element T3, compensating unit 40 include the 4th switch element T4, and energy-storage units 50 include storage capacitance C, and first
Reset unit 60 includes the 5th switch element T5, and the second reset unit 70 includes the 6th switch element T6.Above-mentioned each unit and
The connection relation of each switch element is as shown in Figure 1, details are not described herein again.
With reference to the working timing figure of pixel-driving circuit shown in Figure 2 to the work of the pixel-driving circuit in Fig. 1
It is illustrated as process, by taking all switch elements are P-type transistor as an example.Since all switch elements are P-type transistor,
Therefore, the Continuity signal of all switch elements is low level, and power supply signal VDD is low level.The work schedule illustrates
Depict the first scanning signal G1, the second scanning signal G2 and third scanning signal G3.
In reseting stage (i.e. T1 periods), the second scanning signal G2 is low level, and the first scanning signal G1 and third are swept
Signal G3 is retouched as high level, at this point, first switching element is turned off to the 4th switch element T1~T4, the 6th switch element T6
(i.e. switch unit 10, isolated location 30,40 and second reset unit 70 of compensating unit are turned off), the 5th switch element T5 is led
Logical (i.e. the first reset unit 60 is connected), is passed reset signal INT by the 5th switch element T5 (i.e. the first reset unit 60)
Second node N2 is transported to, to be resetted to second node N2, so as to eliminate the influence of previous frame signal.
In compensated stage (i.e. T2 periods), the first scanning signal G1 is low level, and the second scanning signal G2 and three is scanned
Signal G3 is high level, at this point, first switching element T1, the 4th switch element T4 and the 6th switch element T6 conducting (are opened
Unit 10,40 and second reset unit 70 of compensating unit is closed to be both turned on), second switch element T2, third switch element T3 with
And the 5th switch element T5 close (i.e. 30 and first reset unit 60 of isolated location is closed), pass through first switching element T1
Data-signal DATA is transmitted to first node N1 by (i.e. switch unit 10), since the 4th switch element T4 conductings at this time (are mended
Unit 40 is repaid to be connected), the control terminal for driving crystal DT is connected with first end, will be transmitted to the data-signal of first node N1
Threshold V T H (i.e. offset voltage) the write-in second node N2 of DATA and driving transistor DT, while to storage capacitance C (i.e.
Energy-storage units 50) charging, data-signal DATA is written by compensated stage and to the threshold V T H of driving transistor DT
(i.e. offset voltage) compensates, to eliminate shadows of the threshold V T H to driving current of driving transistor DT in glow phase
It rings.
In glow phase (i.e. T3 periods), the first scanning signal G1 and the second scanning signal G2 are high level, and third is swept
Signal G3 is retouched as low level, at this point, first switching element T1, the 4th switch element to the 6th switch element T4~T6 are closed, the
Two switch element T2 and third switch element T3 conductings.Driving transistor DT is in signal (the i.e. data-signal of second node N2
The threshold V T H of DATA and driving transistor DT) under the action of be connected, and the output driving under the action of power supply signal VDD
Electric current, electroluminescent cell to be driven to shine.
However, in above-mentioned pixel-driving circuit, in order to which pixel crystal drive circuit is made normally to export, the first scanning signal G1 and
Three scanning signal G3 distinguish cabling, provide the first scanning signal G1 respectively therefore, it is necessary to two kinds of frameworks of GOA and EOA and third is swept
Retouch signal G3, it is clear that frame and input signal are more, and power consumption is larger due to there are two kinds of frameworks of GOA and EOA, causing.
In order on the basis of ensureing that pixel-driving circuit normally exports, reduce frame and input signal, power consumption is reduced.This
A kind of pixel-driving circuit is provided in illustrative embodiments, for driving electroluminescent cell, with reference to shown in Fig. 3, the pixel
Driving circuit can include：Switch unit 10, driving unit 20, isolated location 30, compensating unit 40 and energy-storage units 50,
In：
Switch unit 10 is connected for responding the first scanning signal G1, data-signal DATA is transmitted to first node
N1。
Driving unit 20 is connected for the signal in response to second node N2, and in the signal of the first node N1
Act on output driving current.
Isolated location 30 is connected for responding the first scanning signal G1, power supply signal VDD is transmitted to first segment
Point N1, and third node N3 is connected with the first pole of the electroluminescent cell.
Compensating unit 40 is connected for responding the first scanning signal G1, by the data-signal DATA and compensation
The second node N2 is written in signal, and the thermal compensation signal is the threshold V T H of driving transistor DT in driving unit 20.
Energy-storage units 50, for storing the data-signal DATA and the thermal compensation signal.
Wherein, the switch unit 10 is identical with the conduction level phase of the compensating unit 40, i.e., in switch unit 10
Switch element it is identical with the conduction level phase of the switch element in compensating unit 40, in other words, opening in switch unit 10
It is the switch element and compensation list in N-type transistor or switch unit 10 to close the switch element in element and compensating unit 40
Switch element in member 40 is P-type transistor.The isolated location 30 and the switch unit 10 and the compensating unit 40
Conduction level phase differ, i.e., the switch element in the switch element in isolated location 30 and the switch unit 10 and
The conduction level phase of switch element in the compensating unit 40 differs, in other words, the switch in isolated location 30
When element is N-type transistor, the switch element in switch element and compensating unit 40 in switch unit 10 is P-type crystal
Pipe, when the switch element in isolated location 30 is P-type transistor, in the switch element and compensating unit 40 in switch unit 10
Switch element be N-type transistor.
In the course of work of above-mentioned pixel circuit, due to the conduction level phase phase of switch unit 10 and compensating unit 40
Together, isolated location 30 and the conduction level phase of switch unit 10 and compensating unit 40 differ, therefore, in compensated stage,
Switch unit 10 and compensating unit 40 are connected by the first scanning signal G1, isolated location 30 is turned off, by data-signal
DATA and thermal compensation signal write-in second node N2, and in glow phase, by the first scanning signal G1 turn off switch unit 10 with
And compensating unit 40, isolated location 30 is connected, so that driving unit 20 is connected under the action of the signal of second node N2, in electricity
Output driving current under the action of source signal VDD.In conclusion above-mentioned pixel-driving circuit only only used a scanning signal
(the first scanning signal), i.e., with only a scan line, you can the normal output of pixel-driving circuit is ensured, compared to existing
There is technology, reduce the quantity of scan line, and then eliminate EOA frameworks, save frame, and due to only used a scanning
Signal, i.e. the first scanning signal compared with the prior art, reduce the quantity of scanning signal, and then reduce energy consumption, simultaneously also
Preparation process can be simplified, so as to reduce cost.
On this basis, as shown in figure 4, the circuit can also include the first reset unit 60.First reset unit
60, it is connected for responding the second scanning signal G2, reset signal INT is transmitted to the second node N2.Described first
Reset unit 60 can be identical with the conduction level phase of the switch unit 10, i.e. switch element in the first reset unit 60
It is identical with the conduction level phase of the switch element in switch unit 10, in other words, the switch element in the first reset unit 60
It is switch element and switch list in N-type transistor or the first reset unit 60 with the switch element in switch unit 10
Switch element in member 10 is P-type transistor.First reset unit 60 can also be with the conducting of the switch unit 10
Level phase is different, i.e. the conduction level phase of switch element in the first reset unit 60 and the switch element in switch unit 10
Position differs, in other words, when the switch element in the first reset unit 60 is N-type transistor, the switch member in switch unit 10
Part is switch element in P-type transistor or the first reset unit 60 when being P-type transistor, the switch in switch unit 10
Element is N-type transistor.
On this basis, as shown in figure 5, the circuit can also include the second reset unit 70, second reset unit
The reset signal INT for responding the first scanning signal G1 and being connected, is transmitted to the electroluminescent cell by 70
The first pole, wherein, second reset unit 70 is identical with the conduction level phase of the switch unit 10, i.e., second reset
Switch element in unit 70 is identical with the conduction level phase of the switch element in switch unit 10, and in other words, second resets
Switch element in unit 70 and the switch element in switch unit 10 are in N-type transistor or the second reset unit 70
Switch element is P-type transistor with the switch element in switch unit 10.
In the following, the pixel-driving circuit in the present exemplary embodiment is described further with reference to Fig. 3.
The switch unit 10 can include：
First switching element T1, control terminal reception the first scanning signal G1, the first end connection first node N1,
Second end receives the data-signal DATA；
The driving unit 20 can include：
Driving transistor DT, control terminal connects the second node N2, first end connects the third node N3, second end
Connect the first node N1；
The isolated location 30 can include：
Second switch element T2, control terminal receive the first scanning signal G1, and first end connects the first node N1,
Second end receives the power supply signal VDD；
Third switch element T3, control terminal receive the first scanning signal G1, and first end connects the electroluminescent member
First pole of part, second end connect the third node N3；
The compensating unit 40 can include：
4th switch element T4, control terminal receive the first scanning signal G1, and first end connects the second node N2,
Second end connects the third node N3；
The energy-storage units 50 can include：
Storage capacitance C, first end receive the power supply signal VDD, and second end connects the second node N2.
On this basis, as shown in figure 4, first reset unit 60 can include：
5th switch element T5, control terminal receive the second scanning signal G2, and first end connects the second node N2,
Second end receives the reset signal INT.
On this basis, as shown in figure 5, second reset unit 70 can include：
6th switch element T6, control terminal receive the first scanning signal G1, and first end connects the electroluminescent member
First pole of part, second end receive the reset signal INT.
In the present example embodiment, the described first to the 6th switch element T1~T6 can correspond to first to the 6th respectively
Transistor, each transistor are respectively provided with control terminal, first end and second end.Specifically, the control terminal of each transistor can
Think that grid, first end can be source electrode, second end can be drain electrode；Alternatively, the control terminal of each transistor can be grid,
First end can be drain electrode, second end can be source electrode.In addition, each transistor can be enhancement transistor or depletion type
Transistor, the present exemplary embodiment are not particularly limited this.
It should be noted that the conduction level phase of first switching element T1, the 4th switch element T4, the 6th switch element T6
Position is identical, and second switch element T2, the conduction level phase of third switch element T3 are identical, and first switching element T1, the 4th
Switch element T4, phase and the second switch element T2 of conduction level of the 6th switch element T6, third switch element T3 are led
Logical level phase is different, i.e., when first switching element T1, the 4th switch element T4, the 6th switch element T6 are N-type transistor,
Second switch element T2, third switch element T3 are P-type transistor；In first switching element T1, the 4th switch element T4, the 6th
When switch element T6 is P-type transistor, second switch element T2, third switch element T3 are N-type transistor.
In an exemplary embodiment of the disclosure, a kind of pixel circuit drive method is additionally provided, for driving such as Fig. 3 institutes
The pixel-driving circuit shown.
In the following, work of the working timing figure to the pixel-driving circuit in Fig. 3 with reference to pixel-driving circuit shown in fig. 6
Process is described in detail, with the first switching element T1 in switch unit 10, the 4th switch element in compensating unit 40
T4 is P-type transistor, and the second switch element T2 and third switch element T3 in isolated location 30 are that N-type transistor is
Example.Since the first switching element T1 in switch unit 10, the 4th switch element T4 in compensating unit 40 are P-type crystal
Pipe, therefore, switch unit 10 and compensating unit 40 are low level conducting, i.e. first switching element T1 and the 4th switch element T4
It is low level conducting.Since the second switch element T2 in isolated location 30 and third switch element T3 are N-type transistor,
Therefore, second switch element T2 and third switch element T3 is high level conducting.
In compensated stage (i.e. T2 periods), switch unit 10 and compensating unit 40 is connected using the first scanning signal G1,
So that data-signal DATA is transmitted to first node N1, and second node is written into the data-signal DATA and thermal compensation signal
It N2 and charges to energy-storage units 50.In the present example embodiment, the first scanning signal G1 is low level, and switch is single
Member 10, compensating unit 40 are connected, i.e. first switching element T1, the 4th switch element T4 conducting, isolated location 30 are closed, i.e., and second
Switch element T2 and third switch element T3 is closed, and data-signal DATA is by switch unit 10, and (i.e. first switching element T1 is passed
Transport to first node N1), and pass through the driving transistor DT that control terminal is connected with first end and believe data-signal DATA and compensation
Number (i.e. the threshold V T H of driving transistor DT) write-in second node N2, to be filled to energy-storage units 50 (i.e. storage capacitance C)
Electricity.By compensating unit 40, i.e. the 4th switch element T4, the control terminal of driving transistor DT and first end unicom will drive
Threshold V T H (i.e. thermal compensation signal) the write-in second nodes of dynamic transistor DT can eliminate the threshold value electricity of driving transistor DT
Press influences of the VTH to driving current, it is ensured that the consistency of driving current, and then ensure the consistency of display brightness.
In glow phase (i.e. T3 periods), isolated location 30 is connected using the first scanning signal G1, so that driving
Unit 20 is connected under the action of the signal of second node N2, and the output driving current under the action of power supply signal VDD, to drive
The electroluminescent cell is moved to shine.In the present example embodiment, the first scanning signal G1 be high level, switch unit 10,
Compensating unit 40 is closed, i.e. first switching element T1, the 4th switch element T4 are closed, and isolated location 30 is connected, i.e. second switch
Element T2 and third switch element T3 conductings, driving transistor DT is in signal (i.e. data-signal DATA and the benefit of second node N2
Repay signal) under the action of be connected, and in the effect for the power supply signal VDD that first node N1 is transmitted to by second switch element T2
Lower output driving current, this drives current through third switch element T3 and is transmitted to electroluminescent cell, to drive electroluminescent
Element shines.
On the basis of Fig. 3, as shown in figure 4, the pixel-driving circuit can also include the first reset unit 60, it is used for
It responds the second scanning signal G2 and is connected, reset signal INT is transmitted to the second node N2.Based on this, the pixel
Driving method can also include：In reseting stage (i.e. T1 periods), resetted using the second scanning signal G2 conductings described first
Reset signal INT is transmitted to the second node N2 by unit 60, to be resetted to the second node N2.In this example
Property embodiment in, by the 5th switch element T5 in the first reset unit 60 for for P-type transistor, as shown in fig. 6, second sweeps
Signal G2 is retouched as low level, the first reset unit 60 is connected, i.e. reset signal INT is transmitted to by the 5th switch element T5 conductings
Second node N2, to be resetted to second node N2, to eliminate the influence of previous frame signal.
It should be noted that from fig. 6 it can be seen that in reseting stage (i.e. T1 stages), the first scanning signal G1 is height
Level, isolated location 30 are connected, i.e. second switch element T2 and third switch element T3 conductings, at this point, driving transistor DT exists
It is connected under the action of reset signal VIN, the output driving current under the action of power supply signal VDD, so that electroluminescent cell is sent out
Light, still, since the duration of reseting stage is very short, the fluorescent lifetime for causing electroluminescent cell is very short, only several milliseconds, again
Since the voltage of reset signal INT is smaller so that the light emission luminance of electroluminescent cell is dark, therefore, although in conclusion
Reseting stage, isolated location 30 are connected, but the influence of its Integral luminous intensity to electroluminescent cell is smaller, can neglect
Slightly.
On the basis of Fig. 4, as shown in figure 5, the pixel-driving circuit can also include the second reset unit 70, it is used for
It responds the first scanning signal G1 and is connected, the reset signal INT is transmitted to the first of the electroluminescent cell
Pole.Based on this, the image element driving method can also include：In the compensated stage (i.e. T2 periods), described first is utilized
Second reset unit 70 is connected in scanning signal G1, and reset signal INT is transmitted to the first pole of the electroluminescent cell,
It is resetted with the first pole to the electroluminescent cell.In the present example embodiment, in the second reset unit 70
6th switch element T6 be P-type transistor for, as shown in fig. 6, the first scanning signal G1 be low level, the second reset unit 70
Conducting, i.e. the 6th switch element T6 are connected, and reset signal INT are transmitted to the first pole of electroluminescent cell, with to electroluminescent hair
First pole of optical element is resetted, to eliminate the influence of previous frame signal.
In conclusion since switch unit 10, compensating unit 40 are identical with the conduction level phase of the second reset unit 70,
Isolated location 30 and the conduction level phase of switch unit 10,40 and second reset unit 70 of compensating unit differ, therefore,
Only pass through the first scanning signal G1 and the second scanning signal G2, you can realize the normal output of pixel-driving circuit, it is clear that at this
In the pixel-driving circuit provided in exemplary embodiment, reduce third scanning signal G3 as shown in Figure 2, that is, reduce
One scan line (scan line that third scanning signal G3 is provided), and then EOA frameworks are eliminated, frame is saved, and due to subtracting
Lack third scanning signal G3 as shown in Figure 2, reduced the quantity of scanning signal, and then reduce energy consumption, while can also
Enough simplify preparation process, so as to reduce cost.
It should be noted that：In above-mentioned specific embodiment, the first switching element T1, compensation in switch unit 10 are single
The 4th switch element T4 in member 40, in the 6th switch element T6 and the first compensating unit 60 in the second reset unit 70
5th switch element T5 is P-type transistor, and the second switch element T2 and third switch element T3 in isolated location 30 are N
Transistor npn npn, but those skilled in the art are easily obtained according to the pixel-driving circuit that the disclosure is provided in switch unit 10
The 6th switch element T6 in the 4th switch element T4, the second reset unit 70 in first switching element T1, compensating unit 40
And the first the 5th switch element T5 in compensating unit 60 is N-type transistor, the second switch element in isolated location 30
T2 and third switch element T3 is P-type transistor, and therefore, pixel-driving circuit is not limited to the picture provided in the present embodiment
Plain driving circuit, which is not described herein again.
It should be noted that in practical production process, it can be by way of doping, by above-mentioned pixel-driving circuit
In P-type transistor threshold voltage and N-type transistor threshold voltage separate to safety zone, to prevent in pixel-driving circuit
N-type transistor and P-type transistor interfered with each other during driving.
This example embodiment also proposed a kind of display panel, including display area and neighboring area；Wherein, it is described aobvious
Above-mentioned pixel-driving circuit can be included by showing the display area of panel.On this basis, the display area of the display panel is also
It can be including the multi-strip scanning line that transverse and longitudinal is interlocked and multiple data lines and by the adjacent scan line and the adjacent data line
The multiple pixel units limited：Wherein, the scan line is used for transmission the scanning signal that the shift-register circuit provides, institute
State the data-signal that data line is used for transmission source electrode driver offer.
In this example embodiment, the display panel is specifically as follows LCD display panel, OLED display panel, PLED
(Polymer Light-Emitting Diode, polymer LED) display panel, PDP (Plasma Display
Panel, Plasmia indicating panel) etc., here specific limitation is not done for the applicable of display panel.
It should be noted that although several modules or list for acting the equipment performed are referred in above-detailed
Member, but this division is not enforceable.In fact, according to embodiment of the present disclosure, it is above-described two or more
The feature and function of module either unit can embody in a module or unit.A conversely, above-described mould
Either the feature and function of unit can be further divided into being embodied by multiple modules or unit block.
In addition, although describing each step of method in the disclosure with particular order in the accompanying drawings, this does not really want
Asking or implying must could realize according to the particular order come the step for performing these steps or having to carry out shown in whole
Desired result.It is additional or alternative, it is convenient to omit certain steps, by multiple steps merge into a step perform and/
Or a step is decomposed into execution of multiple steps etc..
Those skilled in the art will readily occur to the disclosure its after considering specification and putting into practice invention disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principle of the disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as illustratively, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
Claims (10)
1. a kind of pixel-driving circuit, for driving electroluminescent cell, which is characterized in that including：
Switch unit is connected for responding the first scanning signal, by data signal transmission to first node；
Driving unit is connected for the signal in response to second node, and the effect of the signal in the first node is exported and driven
Streaming current；
Isolated location is connected for responding first scanning signal, and power supply signal is transmitted to first node, and by third
Node is connected with the first pole of the electroluminescent cell；
Compensating unit is connected for responding first scanning signal, will be described in the data-signal and thermal compensation signal write-in
Second node；
Energy-storage units, for storing the data-signal and the thermal compensation signal；
Wherein, the switch unit is identical with the conduction level phase of the compensating unit, the isolated location and the switch
The conduction level phase of unit and the compensating unit differs.
2. pixel-driving circuit according to claim 1, which is characterized in that the circuit further includes：
First reset unit is connected for responding the second scanning signal, reset signal is transmitted to the second node.
3. pixel-driving circuit according to claim 2, which is characterized in that the circuit further includes：
Second reset unit is connected for responding first scanning signal, the reset signal is transmitted to the electricity
First pole of electroluminescent element, wherein, second reset unit is identical with the conduction level phase of the switch unit.
4. pixel-driving circuit according to claim 1, which is characterized in that
The switch unit includes：
First switching element, control terminal receive first scanning signal, and first end connects the first node, second end receives
The data-signal；
The driving unit includes：
Driving transistor, control terminal connects the second node, first end connects the third node, second end connection described the
One node；
The isolated location includes：
Second switch element, control terminal receive first scanning signal, and first end connects the first node, and second end receives
The power supply signal；
Third switch element, control terminal receive first scanning signal, and first end connects the first of the electroluminescent cell
Pole, second end connect the third node；
The compensating unit includes：
4th switch element, control terminal receive first scanning signal, and first end connects the second node, second end connection
The third node；
The energy-storage units include：
Storage capacitance, first end receive the power supply signal, and second end connects the second node.
5. pixel-driving circuit according to claim 2, which is characterized in that first reset unit includes：
5th switch element, control terminal receive second scanning signal, and first end connects the second node, and second end receives
The reset signal.
6. pixel-driving circuit according to claim 3, which is characterized in that second reset unit includes：
6th switch element, control terminal receive first scanning signal, and first end connects the first of the electroluminescent cell
Pole, second end receive the reset signal.
7. a kind of image element driving method, for driving pixel-driving circuit described in claim 1, which is characterized in that the picture
Plain driving method includes：
In compensated stage, switch unit and compensating unit is connected using the first scanning signal, so that data signal transmission is to first
Node, and charge the data-signal and thermal compensation signal write-in second node and to energy-storage units；
In glow phase, isolated location is connected using first scanning signal, so that signal of the driving unit in second node
Under the action of be connected, and the output driving current under the action of power supply signal, the electroluminescent cell to be driven to shine.
8. image element driving method according to claim 7, which is characterized in that it is multiple that the pixel-driving circuit further includes first
Bit location is connected for responding the second scanning signal, reset signal is transmitted to the second node；The pixel driver
Method further includes：
In reseting stage, first reset unit is connected using the second scanning signal, the reset signal is transmitted to described
Second node, to be resetted to the second node.
9. image element driving method according to claim 8, which is characterized in that it is multiple that the pixel-driving circuit further includes second
Bit location is connected for responding first scanning signal, the reset signal is transmitted to the electroluminescent cell
The first pole；The image element driving method further includes：
In the compensated stage, second reset unit is connected using first scanning signal, reset signal is transmitted to
First pole of the electroluminescent cell is resetted with the first pole to the electroluminescent cell.
10. a kind of display panel, including display area and neighboring area, which is characterized in that the display area will including right
Seek the pixel-driving circuit described in any one in 1~6.
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| CN201810054208.XA CN108230982A (en) | 2018-01-19 | 2018-01-19 | Pixel-driving circuit and method, display panel |
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| CN201810054208.XA CN108230982A (en) | 2018-01-19 | 2018-01-19 | Pixel-driving circuit and method, display panel |
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