CN110047432A - A kind of pixel circuit, its driving method, display panel and display device - Google Patents
A kind of pixel circuit, its driving method, display panel and display device Download PDFInfo
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- CN110047432A CN110047432A CN201910465494.3A CN201910465494A CN110047432A CN 110047432 A CN110047432 A CN 110047432A CN 201910465494 A CN201910465494 A CN 201910465494A CN 110047432 A CN110047432 A CN 110047432A
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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]
Abstract
The invention discloses a kind of pixel circuit, its driving method, display panel and display devices, the pixel circuit is resetted using grid of first reset signal to driving transistor, it is resetted using anode of second reset signal to electroluminescent device, and the first reset signal is made to be greater than the second reset signal, this reduces the voltage differences between the first reset signal and data-signal, under the driving circuit driving of identical driving capability, the charging time can be made shorter；In the case where guaranteeing the identical charging time, the driving capability of driving circuit can be reduced, to reduce energy consumption.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of pixel circuit, its driving method, display panel and displays
Device.
Background technique
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) is current display research field
One of hot spot, compared to liquid crystal display (Liquid Crystal Display, LCD), OLED has low energy consumption, is produced into
The advantages that this low, self-luminous, wide viewing angle and fast response time, currently, aobvious in the display fields such as mobile phone, PDA, digital camera OLED
Display screen, which has begun, replaces traditional LCD display.Wherein, pixel circuit design is OLED display core technology content, tool
There is important research significance.
In the related technology, pixel circuit includes: the first reset transistor and the second reset transistor, is write to pixel circuit
Before entering data-signal, in order to avoid voltage remaining in pixel circuit has an impact the data-signal of write-in, write in data
It needs to reset the important node of pixel circuit before entering, wherein the first reset transistor is used for driving transistor
Grid is resetted, and the second reset transistor is for resetting the anode of electroluminescent device, and the first reset transistor
Receive same reset signal with the second reset transistor, and be to guarantee that electroluminescent device is not lighted in the non-luminescent stage, need by
The first voltage signal that reset signal is set as connecting the offer of first voltage signal end with electroluminescent device is close or equal, i.e.,
The voltage of reset signal is arranged lower, therefore, causes to need when the grid to driving transistor carries out data write-in longer
Time, or need biggish driving force, be unfavorable for reducing charging time or energy saving.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of pixel circuit, its driving method, display panel and display dresses
It sets, to solve the above problem present in pixel circuit in the related technology.
In a first aspect, the embodiment of the invention provides a kind of pixel circuits, comprising: the first reseting module, second reset mould
Block, driving transistor and electroluminescent device；
The input terminal of first reseting module is electrically connected with the first reset signal end, the output of first reseting module
It holds and is electrically connected with the grid of the driving transistor, the control terminal of first reseting module is electrically connected with reseting controling end；
The input terminal of second reseting module is electrically connected with the second reset signal end, the output of second reseting module
End is electrically connected with the second pole of the anode of the electroluminescent device and the driving transistor respectively, second reseting module
Control terminal be electrically connected with the reseting controling end；
Wherein, first reset signal end provides the first reset signal and provides second greater than second reset signal end
Reset signal, and first reset signal is less than the data-signal that the grid of the driving transistor is written.
In a kind of possible embodiment, in pixel circuit provided in an embodiment of the present invention, the electroluminescent device
Cathode be electrically connected with first voltage signal end；
Second reset signal is equal with the first voltage signal for being supplied to the first voltage signal end.
In a kind of possible embodiment, in pixel circuit provided in an embodiment of the present invention, first reseting module
It include: the first transistor；
The grid of the first transistor is electrically connected with the reseting controling end, the first pole of the first transistor and the
The electrical connection of one reset signal end, the second pole of the first transistor are electrically connected with the grid of the driving transistor.
In a kind of possible embodiment, in pixel circuit provided in an embodiment of the present invention, second reseting module
It include: second transistor；
The grid of the second transistor is electrically connected with the reseting controling end, the first pole of the second transistor and the
The electrical connection of two reset signal ends, the second pole of the second transistor is electrically connected with the anode of the electroluminescent device.
In a kind of possible embodiment, in pixel circuit provided in an embodiment of the present invention, further includes: the data are write
Enter transistor；
The grid of the data writing transistor is electrically connected with scanning signal end, the first pole of the data writing transistor
It is electrically connected with data signal end, the second pole of the data writing transistor is electrically connected with the grid of the driving transistor.
In a kind of possible embodiment, in pixel circuit provided in an embodiment of the present invention, further includes: first, which shines, controls
Transistor processed and the second light emitting control transistor；
The grid of the first light emitting control transistor is electrically connected with the first light emitting control end, and first light emitting control is brilliant
First pole of body pipe is electrically connected with second voltage signal end, and the second pole of the first light emitting control transistor and the driving are brilliant
First pole of body pipe is electrically connected；
The grid of the second light emitting control transistor is electrically connected with the second light emitting control end, and second light emitting control is brilliant
First pole of body pipe is electrically connected with the second pole of the driving transistor, the second pole of the second light emitting control transistor and institute
State the anode electrical connection of electroluminescent device.
Second aspect, the embodiment of the invention also provides a kind of driving methods of pixel circuit, which comprises
The first reset signal is provided in reseting stage, while to first reset signal end, Xiang Suoshu second resets letter
Number end provide the second reset signal；
Wherein, first reset signal is greater than second reset signal, and first reset signal is less than offer
To the data-signal of the grid of the driving transistor.
In a kind of possible embodiment, in the driving method of pixel circuit provided in an embodiment of the present invention, also wrap
It includes:
The first voltage signal provided to the first voltage signal end；
Wherein, the first voltage signal exists according to the power consumption of the pixel circuit and the brightness of the electroluminescent device
Variation in predetermined voltage range.
It is described in the driving method of pixel circuit provided in an embodiment of the present invention in a kind of possible embodiment
Second reset signal is equal with the first voltage signal.
The third aspect, the embodiment of the invention also provides a kind of display panels, including described in first aspect any embodiment
Pixel circuit.
Fourth aspect, the embodiment of the invention also provides a kind of display devices, including showing described in third aspect embodiment
Show panel.
The embodiment of the present invention the utility model has the advantages that
The embodiment of the invention provides a kind of pixel circuit, its driving method, display panel and display device, pixel electricity
Road includes: the first reseting module, the second reseting module, driving transistor and electroluminescent device；First reseting module
Input terminal is electrically connected with the first reset signal end, the grid electricity of the output end of first reseting module and the driving transistor
Connection, the control terminal of first reseting module are electrically connected with reseting controling end；The input terminal of second reseting module and
The electrical connection of two reset signal ends, the output end of second reseting module respectively with the anode of the electroluminescent device and described
The second pole electrical connection of transistor is driven, the control terminal of second reseting module is electrically connected with the reseting controling end；Wherein,
First reset signal end provides the first reset signal and is greater than the second reset signal of second reset signal end offer, and institute
It states the first reset signal and is less than the data-signal that the grid of the driving transistor is written.Above-mentioned pixel circuit is resetted using first
Signal resets the grid of driving transistor, is resetted using anode of second reset signal to electroluminescent device,
And the first reset signal is made to be greater than the second reset signal, this reduces the voltages between the first reset signal and data-signal
Difference can make the charging time shorter under the driving circuit driving of identical driving capability；Guaranteeing the identical charging time
In the case of, the driving capability of driving circuit can be reduced, to reduce energy consumption.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the pixel circuit that embodiment in the related technology provides；
Fig. 2 is pixel circuit in Fig. 1 when being charged, when voltage difference and charging between reset signal and data-signal
Between between relational graph；
Fig. 3 is one of the structural schematic diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 4 is pixel circuit in Fig. 3 when being charged, and voltage difference between the first reset signal and data-signal and is filled
One of relational graph between the electric time；
Fig. 5 is pixel circuit in Fig. 3 when being charged, and voltage difference between the first reset signal and data-signal and is filled
Two of relational graph between the electric time；
Fig. 6 is the second structural representation of pixel circuit provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of display device provided in an embodiment of the present invention.
Specific embodiment
Pixel circuit in the related technology, as shown in Figure 1, comprising: the first reset transistor M1, the second reset transistor
M2, driving transistor DT, data writing transistor M3 and electroluminescent device OLED；In reseting stage, in reseting controling signal
Under the control for holding Reset, the reset by reset signal end init of the first reset transistor M1 and the second reset transistor M2 are believed
Number Vinit is respectively supplied to the grid of driving transistor DT and the anode of electroluminescent device OLED；In data write phase,
Data writing transistor M3 provides the data-signal Vdata that data signal end Data is provided under the control of scanning signal end Gate
To the grid of driving transistor DT, the cathode of electroluminescent device OLED is electrically connected with first voltage signal end ELVSS, and driving is brilliant
The first pole of body pipe DT is electrically connected with second voltage signal end ELVDD, wherein and first voltage signal end ELVSS is low potential, the
Two voltage signal end ELVDD are high potential, and in order to guarantee not light in electroluminescent device OLED in the non-luminescent stage, need by
Reset signal Vinit is set as connecting the first voltage letter of first voltage signal end ELVSS offer with electroluminescent device OLED
It is number close or equal, i.e. the voltage setting of reset signal Vinit it is lower, therefore, as shown in Fig. 2, leading to data-signal Vdata
Voltage difference between reset signal Vinit is larger, when the grid to driving transistor DT need when data write-in
Between it is longer, wherein positive value generally is arranged in data voltage.
For the above problem existing for pixel circuit in the related technology, the embodiment of the invention provides a kind of pixel electricity
Road, its driving method, display panel and display device.To make the objectives, technical solutions, and advantages of the present invention clearer, under
Face will the present invention is described in further detail in conjunction with attached drawing, it is clear that described embodiment is only that a part of the invention is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of all other embodiment obtained, shall fall within the protection scope of the present invention.
The shapes and sizes of each component do not react actual proportions in attached drawing, and purpose is schematically illustrate the content of present invention.
The embodiment of the invention provides a kind of pixel circuits, as shown in Figure 3, comprising: the first reseting module 1, second resets
Module 2, driving transistor DT and electroluminescent device OLED；
The input terminal of first reseting module 1 is electrically connected with the first reset signal end init1, the output of the first reseting module 1
It holds and is electrically connected with the grid of driving transistor DT, the control terminal of the first reseting module 1 is electrically connected with reseting controling end Reset；
The input terminal of second reseting module 2 is electrically connected with the second reset signal end init2, the output of the second reseting module 2
End is electrically connected with the second pole of the anode of electroluminescent device OLED and driving transistor DT respectively, the control of the second reseting module 2
End processed is electrically connected with reseting controling end Reset；
Wherein, the first reset signal end init1 provides the first reset signal vinit1 greater than the second reset signal end init2
Second reset signal vinit2, and the data letter of grid of the first reset signal vinit1 less than write driver transistor DT are provided
Number Vdata.
Specifically, brilliant to driving using the first reset signal vinit1 in pixel circuit provided in an embodiment of the present invention
The grid of body pipe DT is resetted, and is resetted using the second reset signal vinit2 to the anode of electroluminescent device OLED,
As shown in Figure 4 and Figure 5, the first reset signal vinit1 is greater than the second reset signal vinit2, and this reduces first to reset letter
Voltage difference number between vinit1 and data-signal Vdata.As shown in figure 4, under the driving circuit driving of identical driving capability,
When carrying out data write-in, being written and complete from the first reset signal vinit1 to data-signal Vdata, the used time is t1,
And be written and complete from the second reset signal vinit2 to data-signal Vdata, the used time is t2, and as shown in Figure 4, t1 is far small
In t2, i.e., using after the first reseting signal reset, the time charged to pixel is shorter, can be applied to large scale display surface
Plate guarantees the display effect of large scale display panel；As shown in figure 5, can be dropped in the case where guaranteeing the identical charging time
The driving capability of low driving circuit, so as to reduce energy consumption.
It should be noted that the size of the voltage value of the first reset signal is selected according to the voltage range values of data-signal
It selects, wherein the data-signal provided to each pixel is the voltage value in certain voltage range, therefore, the first reset signal
Voltage value should select to be less than the smallest voltage value in the voltage range.
Optionally, in pixel circuit provided in an embodiment of the present invention, as shown in figure 3, the yin of electroluminescent device OLED
Pole is electrically connected with first voltage signal end ELVSS；
Second reset signal vinit2 is equal with the first voltage signal for being supplied to first voltage signal end ELVSS.
To guarantee that in the non-luminescent stage, electroluminescent device does not occur the shinny problem of blank screen, needs to guarantee electroluminescent
Voltage difference between the anode and cathode of device, can be by the second reset signal less than voltage needed for lighting electroluminescent device
Voltage be set as close with the voltage of first voltage signal, guarantee that pressure difference between the two is insufficient to allow electroluminescent device to send out
It is bright, specifically, the voltage of the second reset signal can also be made equal with the voltage of first voltage signal, according to actual use situation
It is selected, is not specifically limited herein.
Optionally, in pixel circuit provided in an embodiment of the present invention, as shown in fig. 6, the first reseting module 1 includes:
One transistor T1；
The grid of the first transistor T1 is electrically connected with reseting controling end Reset, the first pole and first of the first transistor t1
Second pole of reset signal end init1 electrical connection, the first transistor T1 is electrically connected with the grid of driving transistor DT.
Specifically, in pixel circuit provided in an embodiment of the present invention, as shown in fig. 6, the first transistor T1 can be N-type
Transistor works as reseting controling end at this point, the first transistor T1 is in the conductive state when reseting controling end Reset is high level
The first transistor T1 is in off state when Reset is low level；The first transistor T1 may be P-type transistor (in figure
It is not shown), at this point, the first transistor T1 is in the conductive state when reseting controling end Reset is low level, work as reseting controling end
The first transistor T1 is in off state when Reset is high level；It is not limited thereto.
Specifically, above-mentioned pixel circuit provided in an embodiment of the present invention, when the first transistor is in the control of reseting controling end
Under it is in the conductive state when, the first transistor that the first reset signal just passes through conducting be transferred to driving transistor grid, from
And realize that the grid voltage to driving transistor is reset.
The above is only the specific structures for illustrating the first reseting module in pixel circuit, and in the specific implementation, first is multiple
Position module specific structure be not limited to above structure provided in an embodiment of the present invention, can also be skilled person will appreciate that
Other structures, it is not limited here.
Optionally, in pixel circuit provided in an embodiment of the present invention, as shown in fig. 6, the second reseting module 2 includes:
Two-transistor T2；
The grid of second transistor T2 is electrically connected with reseting controling end Reset, the first pole and second of second transistor T2
Reset signal end init2 electrical connection, the second pole of second transistor T2 is electrically connected with the anode of electroluminescent device OLED.
Specifically, in pixel circuit provided in an embodiment of the present invention, as shown in fig. 6, second transistor T2 can be N-type
Transistor works as reseting controling end at this point, second transistor T2 is in the conductive state when reseting controling end Reset is high level
Second transistor T2 is in off state when Reset is low level；Second transistor T2 may be P-type transistor (in figure
It is not shown), at this point, second transistor T2 is in the conductive state when reseting controling end Reset is low level, work as reseting controling end
Second transistor T2 is in off state when Reset is high level；It is not limited thereto.
Specifically, above-mentioned pixel circuit provided in an embodiment of the present invention, when second transistor is in the control of reseting controling end
Under it is in the conductive state when, the second transistor that the second reset signal just passes through conducting is transferred to the anode of electroluminescent device,
The anode voltage of electroluminescent device is resetted to realize.
The above is only the specific structures for illustrating the second reseting module in pixel circuit, and in the specific implementation, second is multiple
Position module specific structure be not limited to above structure provided in an embodiment of the present invention, can also be skilled person will appreciate that
Other structures, it is not limited here.
Optionally, in pixel circuit provided in an embodiment of the present invention, as shown in Figure 6, further includes: data writing transistor
T3；
The grid of data writing transistor T3 is electrically connected with scanning signal end Gate, the first pole of data writing transistor T3
It is electrically connected with data signal end Data, the second pole of data writing transistor T3 is electrically connected with the grid of driving transistor DT.
Specifically, in pixel circuit provided in an embodiment of the present invention, as shown in fig. 6, data writing transistor T3 can be with
For N-type transistor, at this point, data writing transistor T3 is in the conductive state when scanning signal end Gate is high level, when sweeping
It retouches data writing transistor T3 when signal end Gate is low level and is in off state；Data writing transistor T3 may be P
Transistor npn npn (not shown in FIG.), at this point, when scanning signal end Gate be low level when data writing transistor T3 be in lead
Logical state, when scanning signal end Gate is high level, data writing transistor T3 is in off state；It is not limited thereto.
Specifically, above-mentioned pixel circuit provided in an embodiment of the present invention, when data writing transistor is at scanning signal end
When in the conductive state under control, the data-signal that data signal end provides just passes through the data writing transistor of conducting for data
Signal is written to the grid of driving transistor.
Optionally, in pixel circuit provided in an embodiment of the present invention, as shown in Figure 6, further includes: the first light emitting control is brilliant
Body pipe T4 and the second light emitting control transistor T5；
The grid of first light emitting control transistor T4 is electrically connected with the first light emitting control end EM1, the first light emitting control crystal
The first pole of pipe T4 is electrically connected with second voltage signal end ELVDD, and the second pole of the first light emitting control transistor T4 and driving are brilliant
The first pole of body pipe DT is electrically connected；
The grid of second light emitting control transistor T5 is electrically connected with the second light emitting control end EM2, the second light emitting control crystal
The first pole of pipe T5 is electrically connected with the second pole of driving transistor DT, the second pole of the second light emitting control transistor T5 and electroluminescent hair
The anode of optical device OLED is electrically connected.
Specifically, in pixel circuit provided in an embodiment of the present invention, as shown in fig. 6, the first light emitting control transistor T4
Can be N-type transistor, at this point, when the first light emitting control end EM1 be high level when the first light emitting control transistor T4 be in lead
Logical state, when the first light emitting control end EM1 is low level, the first light emitting control transistor T4 is in off state；First shines
Controlling transistor T4 may be P-type transistor (not shown in FIG.), at this point, when the first light emitting control end EM1 is low level
When the first light emitting control transistor T4 it is in the conductive state, when the first light emitting control end EM1 be high level when the first light emitting control
Transistor T4 is in off state；It is not limited thereto.
Specifically, above-mentioned pixel circuit provided in an embodiment of the present invention, when the first light emitting control transistor shines first
When in the conductive state under the control of control terminal, the second voltage signal that second voltage signal end provides just passes through the first of conducting
Second voltage signal is supplied to the first pole of driving transistor by light emitting control transistor.
Specifically, in pixel circuit provided in an embodiment of the present invention, as shown in fig. 6, the second light emitting control transistor T5
Can be N-type transistor, at this point, when the second light emitting control end EM2 be high level when the second light emitting control transistor T5 be in lead
Logical state, when the second light emitting control end EM2 is low level, the second light emitting control transistor T5 is in off state；Second shines
Controlling transistor T5 may be P-type transistor (not shown in FIG.), at this point, when the second light emitting control end EM2 is low level
When the second light emitting control transistor T5 it is in the conductive state, when the second light emitting control end EM2 be high level when the second light emitting control
Transistor T5 is in off state；It is not limited thereto.
Specifically, above-mentioned pixel circuit provided in an embodiment of the present invention, when the second light emitting control transistor shines second
When in the conductive state under the control of control terminal, the signal for driving the second pole of transistor is supplied to the sun of electroluminescent device
Pole, driving electroluminescent device shine.
It should be noted that the first light emitting control end and the second light emitting control end can be same in above-mentioned pixel circuit
Light emitting control end, to reduce the wiring of pixel circuit.
Based on the same inventive concept, the embodiment of the invention provides a kind of driving methods of pixel circuit, this method comprises:
The first reset signal is provided in reseting stage, while to the first reset signal end, is provided to the second reset signal end
Second reset signal；
Wherein, the first reset signal be greater than the second reset signal, and the first reset signal be less than be supplied to driving transistor
Grid data-signal.
Wherein, detailed elaboration has been carried out in the above-described embodiments to the driving process and principle of pixel circuit,
This is repeated no more.
Optionally, in the driving method of pixel circuit provided in an embodiment of the present invention, further includes:
The first voltage signal provided to first voltage signal end；
Wherein, first voltage signal is according to the power consumption of pixel circuit and the brightness of electroluminescent device in predetermined voltage range
Interior variation.
Specifically, in the driving method of pixel circuit provided in an embodiment of the present invention, first voltage signal is one dynamic
State voltage signal is not a fixed voltage value, and first voltage signal can be according to picture during the display of display panel
The power consumption of plain circuit and the brightness of electroluminescent device carry out dynamic adjustment using related algorithm.
It, can be by the second of the second reset signal end in order to guarantee that electroluminescent device is not in the luminous problem of blank screen
Reset signal is set as linking with first voltage signal, i.e., when first voltage signal increases, the second reset signal is also corresponding
Increase, guarantees that voltage difference between the two is insufficient to allow electroluminescent device shinny.
Specifically, the second reset signal can be made equal with first voltage signal.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display panel, which includes above-mentioned
The pixel circuit that any embodiment provides.
Wherein, the concrete operating principle and specific embodiment of display panel are identical as above-mentioned pixel circuit, reference can be made on
The embodiment for stating pixel circuit is embodied, and details are not described herein.
Based on the same inventive concept, as shown in fig. 7, the embodiment of the invention also provides a kind of display device, display dress
It sets including display panel provided by the above embodiment.
Wherein, which, which is suitable for display of organic electroluminescence, inorganic EL display, active matrix, has
The multiple types such as machine light emitting diode indicator (Active Matrix/Organic Light Emitting Diode, AMOLED)
The display of type.The display device can be with are as follows: mobile phone, tablet computer, television set, display, laptop, Digital Frame,
Any products or components having a display function such as navigator, are not limited thereto.
The embodiment of the invention provides a kind of pixel circuit, its driving method, display panel and display device, pixel electricity
Road includes: the first reseting module, the second reseting module, driving transistor and electroluminescent device；First reseting module
Input terminal is electrically connected with the first reset signal end, the grid electricity of the output end of first reseting module and the driving transistor
Connection, the control terminal of first reseting module are electrically connected with reseting controling end；The input terminal of second reseting module and
The electrical connection of two reset signal ends, the output end of second reseting module respectively with the anode of the electroluminescent device and described
The second pole electrical connection of transistor is driven, the control terminal of second reseting module is electrically connected with the reseting controling end；Wherein,
First reset signal end provides the first reset signal and is greater than the second reset signal of second reset signal end offer, and institute
It states the first reset signal and is less than the data-signal that the grid of the driving transistor is written.Above-mentioned pixel circuit is resetted using first
Signal resets the grid of driving transistor, is resetted using anode of second reset signal to electroluminescent device,
And the first reset signal is made to be greater than the second reset signal, this reduces the voltages between the first reset signal and data-signal
Difference can make the charging time shorter under the driving circuit driving of identical driving capability；Guaranteeing the identical charging time
In the case of, the driving capability of driving circuit can be reduced, to reduce energy consumption.
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 (11)
1. a kind of pixel circuit characterized by comprising the first reseting module, the second reseting module, driving transistor and electroluminescent
Luminescent device；
The input terminal of first reseting module is electrically connected with the first reset signal end, the output end of first reseting module with
The grid electrical connection of the driving transistor, the control terminal of first reseting module are electrically connected with reseting controling end；
The input terminal of second reseting module is electrically connected with the second reset signal end, the output end point of second reseting module
It is not electrically connected with the second pole of the anode of the electroluminescent device and the driving transistor, the control of second reseting module
End processed is electrically connected with the reseting controling end；
Wherein, first reset signal end provides the first reset signal and provides the second reset greater than second reset signal end
Signal, and first reset signal is less than the data-signal that the grid of the driving transistor is written.
2. pixel circuit as described in claim 1, which is characterized in that the cathode and first voltage of the electroluminescent device are believed
Number end electrical connection；
Second reset signal is equal with the first voltage signal for being supplied to the first voltage signal end.
3. pixel circuit as described in claim 1, which is characterized in that first reseting module includes: the first transistor；
The grid of the first transistor is electrically connected with the reseting controling end, and the first pole of the first transistor is multiple with first
Position signal end electrical connection, the second pole of the first transistor are electrically connected with the grid of the driving transistor.
4. pixel circuit as described in claim 1, which is characterized in that second reseting module includes: second transistor；
The grid of the second transistor is electrically connected with the reseting controling end, and the first pole of the second transistor is multiple with second
Position signal end electrical connection, the second pole of the second transistor is electrically connected with the anode of the electroluminescent device.
5. pixel circuit as described in claim 1, which is characterized in that further include: the data writing transistor；
The grid of the data writing transistor is electrically connected with scanning signal end, the first pole of the data writing transistor and number
It is electrically connected according to signal end, the second pole of the data writing transistor is electrically connected with the grid of the driving transistor.
6. pixel circuit as described in claim 1, which is characterized in that further include: the first light emitting control transistor and the second hair
Photocontrol transistor；
The grid of the first light emitting control transistor is electrically connected with the first light emitting control end, the first light emitting control transistor
The first pole be electrically connected with second voltage signal end, the second pole of the first light emitting control transistor and the driving transistor
The first pole electrical connection；
The grid of the second light emitting control transistor is electrically connected with the second light emitting control end, the second light emitting control transistor
The first pole be electrically connected with the second pole of the driving transistor, the second pole of the second light emitting control transistor and the electricity
The anode of electroluminescence device is electrically connected.
7. a kind of driving method of pixel circuit as claimed in any one of claims 1 to 6, which is characterized in that the method packet
It includes:
The first reset signal, the second reset signal of Xiang Suoshu end are provided in reseting stage, while to first reset signal end
Second reset signal is provided；
Wherein, first reset signal be greater than second reset signal, and first reset signal be less than be supplied to institute
State the data-signal of the grid of driving transistor.
8. the driving method of pixel circuit as claimed in claim 7, which is characterized in that further include:
The first voltage signal provided to the first voltage signal end；
Wherein, the first voltage signal is according to the power consumption of the pixel circuit and the brightness of the electroluminescent device default
Variation in voltage range.
9. the driving method of pixel circuit as claimed in claim 8, which is characterized in that second reset signal and described the
One voltage signal is equal.
10. a kind of display panel, which is characterized in that including pixel circuit as claimed in any one of claims 1 to 6.
11. a kind of display device, which is characterized in that including display panel as claimed in claim 10.
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