CN110379351A - Driving method, display panel and the display device of display panel - Google Patents
Driving method, display panel and the display device of display panel Download PDFInfo
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- CN110379351A CN110379351A CN201910686863.1A CN201910686863A CN110379351A CN 110379351 A CN110379351 A CN 110379351A CN 201910686863 A CN201910686863 A CN 201910686863A CN 110379351 A CN110379351 A CN 110379351A
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- shift register
- scan pattern
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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
- G09G2310/0267—Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
-
- 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
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Abstract
The embodiment of the invention provides a kind of driving method of display panel, display panel and display devices, are related to field of display technology, when scanning using different frequency, can not only avoid the occurrence of splashette phenomenon, moreover it is possible to guarantee that the light emission luminance under different frequency reaches unanimity.Above-mentioned driving method includes: under the first scan pattern, and driving shift register is scanned with first frequency, and shift register output is made to have the first scanning signal of the first pulse distance and the first pulse width；Under the second scan pattern, driving shift register is scanned with second frequency, and shift register output is made to have the second scanning signal of the second pulse distance and the second pulse width；Wherein, second frequency is less than first frequency, and the second pulse distance is greater than the first pulse distance, and the second pulse width is greater than the first pulse width, also, the μ of △ t≤0.25 s, △ t is the difference of the second pulse width and the first pulse width.
Description
[technical field]
The present invention relates to field of display technology more particularly to a kind of driving methods of display panel, display panel and display
Device.
[background technique]
Currently, display panel generally includes plurality of display modes, such as suspend mode, game mode, to save power consumption,
Under different display patterns, the scan frequency of shift register is different, for example, shift register carries out low frequency in the hibernation mode
Rate scanning, carries out high frequency scan under game mode.For this kind of situation, two kinds of driving methods exist in the prior art:
The first: under different scan frequencies, shift register output has the scanning signal of different pulse widths, but
It is that this will lead to the duration difference that data-signal is written under different scanning frequency, so that original brightness difference is occurred, thus needs
With different regulation data, such as to the corrected gamma data of raw frames.That is, under this kind of driving method, no
Same scan frequency need to match different regulation data, it is relatively complicated not only result in driving method, moreover, scan frequency is cut
When changing, matching regulation data need the regular hour again, lead to splashette phenomenon occur, influence display performance.
Second: under different scan frequencies, shift register output has the scanning signal of same pulse width,
With same set of regulation data.But using this kind of driving method, as shown in FIG. 1, FIG. 1 is the one of pixel circuit in the prior art
Kind structural schematic diagram, the light-emitting period in a frame drive cycle are influenced, first segment by reference voltage signal Vref leakage current
The current potential of point N1 declines, and still, drives week since the duration of the corresponding drive cycle of different scanning frequency is different, thus in a frame
The duration that first node current potential declines in phase is also just different, as shown in Fig. 2, Fig. 2 is different frequency corresponding the in the prior art
The attenuation degree schematic diagram of one node potential, for high-frequency such as 120Hz, the duration of a frame drive cycle is shorter, and first
Decline degree of the node potential in shorter light-emitting period is larger, and for low frequency, the duration of a frame drive cycle
Longer, decline degree of the first node current potential in longer light-emitting period is larger.According to light emitting phase leakage current formula I=K
(PVDD-VN1-|Vth|)2It is found that the current potential V of light emission luminance and first nodeN1It is inversely proportional, therefore, the corresponding luminance of low frequency
Degree is higher than the corresponding light emission luminance of high-frequency, and it is poor that this results in light emission luminance of the display panel under different scanning frequency to occur
It is different, it influences to show homogeneity.
Therefore, how to make display panel that there is good display performance under different scan frequencies, become current assistant officer
Technical problem to be solved.
[summary of the invention]
In view of this, the embodiment of the invention provides a kind of driving method of display panel, display panel and display device,
When being scanned using different frequency, splashette phenomenon can not only be avoided the occurrence of, moreover it is possible to guarantee the light emission luminance under different frequency
It reaches unanimity, improves display performance.
On the one hand, the embodiment of the invention provides a kind of driving methods of display panel, comprising:
Under the first scan pattern, driving shift register is scanned with first frequency, keeps the shift register defeated
Provide the first scanning signal of the first pulse distance and the first pulse width；
Under the second scan pattern, the shift register is driven to be scanned with second frequency, makes the shift LD
Device output has the second scanning signal of the second pulse distance and the second pulse width；
Wherein, the second frequency is less than the first frequency, and second pulse distance is greater than between first pulse
Away from second pulse width is greater than first pulse width, also, the μ of △ t≤0.25 s, △ t is that second pulse is wide
The difference of degree and first pulse width.
Optionally,Wherein, 0 < k < 2, f1 are the first frequency, and f2 is institute
State second frequency, IoffFor the leakage current of thin film transistor (TFT), IonFor the charging current of thin film transistor (TFT).
Optionally,
Optionally, same grayscale value corresponding for same color sub-pixel, is provided under second scan pattern
Second data voltage of data line, with the first data voltage phase for being provided to the data line under first scan pattern
Deng.
Optionally, further includes:
The time difference in the unlatching forward position and the second data voltage write time of second scanning signal, with described the
The unlatching forward position of scan signal and the time difference of the first data voltage write time are equal.
Optionally, further includes:
Under first scan pattern, when Xiang Suoshu shift register provides first with first pulse width
Clock signal；
Under second scan pattern, when Xiang Suoshu shift register provides second with second pulse width
Clock signal.
Optionally, further includes:
Under first scan pattern, the shift register is with any one of first frequency in first frequency section
Rate is scanned, and what the shift register exported under each first frequency in the first frequency section described first sweeps
First pulse width for retouching signal is identical；
Under second scan pattern, the shift register is with any one of second frequency in second frequency section
Rate is scanned, and what the shift register exported under each second frequency in the second frequency section described second sweeps
Second pulse width for retouching signal is identical.
Optionally, the maximum frequency difference of multiple first frequencies in the first frequency section is less than or equal to 30Hz,
The maximum frequency difference of multiple second frequencies in the second frequency section is less than or equal to 30Hz.
Optionally, first scan pattern and second scan pattern switching, when Y >=50%, second pulse
The difference of width and first pulse width is △ t1；When Y < 50%, second pulse width and first pulse are wide
The difference of degree is △ t2, △ t2 < △ t1；Y is the sub-pixel quantity that high gray is shown after scan pattern switches and whole sub-pixels
Quantity percentage.
On the other hand, the embodiment of the invention also provides a kind of display panels, comprising:
Shift register, for sequentially exporting scanning signal；
Sequence controller, the sequence controller include:
Scan pattern control module, the scan pattern control module are electrically connected with the shift register, for the
Under one scan pattern, the shift register is driven to be scanned with first frequency, under the second scan pattern, drives the shifting
Bit register is scanned with second frequency；
Pulse control module, the pulse control module respectively with the scan pattern control module, the shift LD
Device electrical connection controls the shift register output with the first pulse distance and the under first scan pattern
First scanning signal of one pulse width controls the shift register output with second under second scan pattern
Second scanning signal of pulse distance and the second pulse width；
Wherein, the second frequency is less than the first frequency, and second pulse distance is greater than between first pulse
Away from second pulse width is greater than first pulse width, also, the μ of △ t≤0.25 s, △ t is that second pulse is wide
The difference of degree and first pulse width.
Optionally, the sequence controller further include:
Clock control module, the clock control module respectively with the scan pattern control module, the shift LD
Device electrical connection, under first scan pattern, Xiang Suoshu shift register, which provides, has the of first pulse width
One clock signal, under second scan pattern, Xiang Suoshu shift register, which provides, has the second of second pulse width
Clock signal.
In another aspect, the embodiment of the invention also provides a kind of display device, including above-mentioned display panel.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
Using technical solution provided by the embodiment of the present invention, when shift register is scanned with different frequencies,
The duration that drive cycle is adjusted in such a way that the pulse distance to scanning signal is adjusted, can be avoided to scanning signal
Pulse width is substantially adjusted, and the corresponding pulse width of different frequency is substantially the same, thus make data-signal be written when
Length is substantially the same, and ensure that the original brightness under different frequency is substantially the same, it is made only to match a set of regulation data.This
Sample not only simplifies driving method in frequency error factor, also without matching regulation data again, avoids the occurrence of splashette phenomenon.And
And by further carrying out subtle adjustment to the corresponding pulse width of different frequency, keep the corresponding pulse width of upper frequency small
In the corresponding pulse width of lower frequency, moreover it is possible to be effectively improved that light-emitting period first node voltage attenuation degree is inconsistent to ask
Topic guarantees that the light emission luminance under different frequency reaches unanimity, improves display performance.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structural schematic diagram of pixel circuit in the prior art；
Fig. 2 is the attenuation degree schematic diagram of the corresponding first node current potential of different frequency in the prior art；
Fig. 3 is the corresponding signal timing diagram of pixel circuit in the prior art；
Fig. 4 is the flow chart of driving method provided by the embodiment of the present invention；
Fig. 5 is the timing diagram of corresponding first scanning signal of first frequency provided by the embodiment of the present invention；
Fig. 6 is the timing diagram of corresponding second scanning signal of second frequency provided by the embodiment of the present invention；
Fig. 7 is the structural schematic diagram of display panel provided by the embodiment of the present invention；
Fig. 8 is another structural schematic diagram of display panel provided by the embodiment of the present invention；
Fig. 9 is the structural schematic diagram of display device provided by the embodiment of the present invention.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
In order to which technical solution provided by the embodiment of the present invention is more clearly understood, illustrating that the embodiment of the present invention is mentioned
Before the technical solution of confession, the working principle of pixel circuit as shown in Figure 1 is illustrated first:
As shown in figure 3, Fig. 3 is the corresponding signal timing diagram of pixel circuit in the prior art, the drive cycle of pixel circuit
Period t2 and light-emitting period t3 is written including initialization period t1, data-signal.
It is low level, the second scanning signal Scan2 and light emitting control in initialization period t1, the first scanning signal Scan1
Signal Emit is high level, and reference voltage signal Vref is transmitted to first node N1 via the 5th thin film transistor (TFT) T5 of conducting,
And the anode of light emitting diode D is transmitted to via the 7th thin film transistor (TFT) T7 of conducting, it realizes to first node N1 and shines
The reset of the anode of diode D, in the period, VN1=Vref.
Data-signal write-in period t2, the first scanning signal Scan1 and LED control signal Emit be high level, second
Scanning signal Scan2 is low level, and data-signal Data is via the second thin film transistor (TFT) T2 of conducting and the 4th thin film transistor (TFT)
First node N1 is written in T4, charges to first node N1, in the period, ideally, VN1=VData-|Vth|。
It is high level, light emitting control letter in light-emitting period t3, the first scanning signal Scan1 and the second scanning signal Scan2
Number Emit is continuously low level, and first film transistor T1, third thin film transistor (TFT) T3 and the 6th thin film transistor (TFT) T6 are persistently led
It is logical, light emitting diode D continuous illumination under the action of the data-signal Data of write-in and power supply signal PVDD, in the period,
Driving currentIn the ideal situation, VN1=VData| Vth |, it derives,Wherein, μnIndicate the migration rate of electronics, COXIndicate unit area gate oxide electricity
Hold,Indicate channel width-over-length ratio.
Based on this, the embodiment of the invention provides a kind of driving methods of display panel, and as shown in Fig. 4~Fig. 6, Fig. 4 is
The flow chart of driving method provided by the embodiment of the present invention, Fig. 5 are that first frequency provided by the embodiment of the present invention is corresponding
The timing diagram of first scanning signal, Fig. 6 be the embodiment of the present invention provided by corresponding second scanning signal of second frequency when
Sequence figure, the driving method include:
Step S1: under the first scan pattern, driving shift register is scanned with first frequency f1, makes shift LD
Device output with the first pulse distance L1 and the first pulse width W1 the first scanning signal Scan (Scan1, Scan2 ...,
Scan n)。
Step S2: under the second scan pattern, driving shift register is scanned with second frequency f2, makes shift LD
Device output with the second pulse distance L2 and the second pulse width W2 the second scanning signal Scan ' (Scan1 ', Scan2 ' ...,
Scan n′)；Wherein, second frequency f2 is less than first frequency f1, and the second pulse distance L2 is greater than the first pulse distance L1, and second
Pulse width W2 is greater than the first pulse width W1, also, the μ of △ t≤0.25 s, △ t is that the second pulse width W2 and the first pulse are wide
Spend the difference of W1.
In the driving method of the display panel provided by the embodiment of the present invention, when shift register is carried out with different frequency
When scanning, the pulse distance to scanning signal is adjusted be substantially the same pulse width by way of, realize to driving
The duration in period is adjusted, it is made to match with corresponding frequency values: between corresponding first pulse of higher first frequency f1
It is smaller away from L1, to keep the duration of drive cycle shorter；And under lower second frequency f2 corresponding second pulse distance L2 compared with
Greatly, to keep the duration of drive cycle longer.
Further, then by the pulse width to the corresponding scanning signal of different frequency subtle adjustment is carried out, made lower
The corresponding pulse width of frequency is greater than the corresponding pulse width of upper frequency, it is ensured that the light emission luminance phase under different frequency
Together.Specifically, in conjunction with the working principle of above-mentioned pixel circuit, when shift register is scanned with higher first frequency f1
When, period t2, the corresponding duration of when a length of first pulse width W1 of data-signal write-in, at this point, real is written in data-signal
The voltage that first node N1 is written in border is vN1.And when shift register is scanned with lower second frequency f2, compared to
First pulse width W1, by by the second pulse width W2 carry out it is subtle tune up, the first pulse width W1 is larger than, in data
Period t2 is written in signal, and the duration of data-signal write-in is greater than the duration that data-signal is written under first frequency f1, therefore, the
Under two frequency f2, it is actually written into the voltage v of first node N1N1' more abundant, closer to VData| Vth |, that is, vN1' >
vN1.In this way, in light-emitting period t3, even if being influenced by reference voltage signal Vref leakage current, higher vN1' occurring
Actual voltage value v after greater attenuationN11', it also can be with lower vN1Actual voltage value v after smaller decaying occursN11Tend to one
It causes, so that the corresponding driving current of first frequency f1With second frequency f2
Corresponding driving currentTend to be identical, and then guarantees the hair under different frequency
Brightness reaches unanimity, and improves display performance.
In addition, inventor has found that referring to table 1, by actual measurement 120Hz, 60Hz, 30Hz in different pulse widths
Under brightness value it is found that the difference of the corresponding pulse width of different frequency is when within 0.25 μ s, different frequency is corresponding initial
Brightness value difference is smaller, can match same set of regulation data and be corrected to initial picture.
Table 1
To sum up, using driving method provided by the embodiment of the present invention, when shift register is swept with different frequencies
When retouching, the duration of drive cycle is adjusted in such a way that the pulse distance to scanning signal is adjusted, can be avoided to scanning
The pulse width of signal is substantially adjusted, and is substantially the same the corresponding pulse width of different frequency, so that data-signal be made to write
The duration entered is substantially the same, and ensure that the original brightness under different frequency is substantially the same, it is made only to match a set of regulation data.This
Sample not only simplifies driving method in frequency error factor, also without matching regulation data again, avoids the occurrence of splashette phenomenon.And
And by further carrying out subtle adjustment to the corresponding pulse width of different frequency, keep the corresponding pulse width of upper frequency small
In the corresponding pulse width of lower frequency, moreover it is possible to be effectively improved that light-emitting period first node N1 voltage attenuation degree is inconsistent to ask
Topic guarantees that the light emission luminance under different frequency reaches unanimity, improves display performance.
Further, when pulse-width does not carry out subtle adjustment, second frequency f2 and first frequency f1 is corresponding is leaked
The difference of first node N1 current potential decline degree after stream influenceIts
In, IoffFor the leakage current of thin film transistor (TFT), Ioff=10-12A~10-13A；After pulse-width carries out subtle adjustment, second
The corresponding potential difference for not considering first node N1 when leakage current influences of frequency f2 and first frequency f1 is (namely by leakage current shadow
The difference of the current potential of first node N1 is written to before sound)Wherein, △ t is the second pulse distance
The difference of L2 and the first pulse distance L1, IonFor the charging current of thin film transistor (TFT), Ion=10*10-9A~100*10-9A.In order to
The potential difference for making first node N1 under different frequency caused by being finely tuned by pulse width, preferably compensates as caused by leakage current not
The difference of first node N1 current potential decline degree under same frequency, makes to be influenced the first node after decaying by leakage current under different frequency
The current potential of N1 tends to be identical, △ V2 and △ V1 can be enabled to meet: Δ V2=k × Δ V1, wherein 0 < k < 2, and then derive:
It should be noted that for different first frequency f1 and second frequency f2, first frequency f1 and second frequency f2
Corresponding △ t's is that numerical value is different.For example, when second frequency f2 is 30Hz, first frequency f1 is 60Hz, 30Hz and 60Hz
The duration of corresponding drive cycle differs greatly, therefore, the attenuation degree difference that first node N1 is influenced by leakage current also just compared with
Greatly, at this point, the second pulse width W2 just needs to compensate more compared to the first pulse width W1, that is, △ t larger.And work as
When second frequency f2 is 120Hz, first frequency f1 is 90Hz, the difference of 90Hz and the corresponding scan period duration of 120Hz is smaller,
Therefore, the attenuation degree difference that first node N1 is influenced by leakage current is also smaller, at this point, the second pulse width W2 is compared to first
Pulse width W1 can be compensated less, that is, △ t smaller.Also, when different frequency switches over, it can compensate as needed
△ t size, choose suitable numerical value to k: when the △ t for needing to compensate is larger, k chooses biggish numerical value in 0~2, when
When the △ t for needing to compensate is smaller, k chooses lesser numerical value in 0~2.
Optionally, after being compensated to the second pulse width W2, in light-emitting period, preceding half of period first node N1
Current potential decline degree it is smaller, first node N1 current potential is higher, the current potential of rear half of period first node N1 decline degree compared with
Greatly, first node N1 current potential is lower, according to driving current formulaIt is found that first half
Period brightness is partially dark, and then half of period brightness is partially bright, in order to make the average brightness of preceding half of period and latter half
The average brightness of period is more nearly, and weakens the difference of light emission luminance in entire light-emitting period, can be made
Optionally, same grayscale value corresponding for same color sub-pixel, is provided to data under the second scan pattern
Second data voltage of line is equal with the first data voltage of data line is provided under the first scan pattern.For same face
The corresponding same grayscale value of sub-pixels, the data voltage that data line is provided under different frequency is equal, can make data-signal
The V of period write-in is writtenDataIt is identical, and then guarantees to utilize identical V at different frequenciesDataFirst node N1 is carried out
Charging, avoids by VDataFirst node N1 current potential different problems after charging caused by difference.
Further, referring again to Fig. 5 and Fig. 6, the unlatching forward position of the second scanning signal Scan ' is (in Fig. 6 where dotted line
Position) and the second data voltage write time (the failing edge position of the second scanning signal Scan ' in Fig. 6) time difference
H2, unlatching forward position (dotted line position in Fig. 5) and first data voltage write time (Fig. 5 with the first scanning signal Scan
In the first scanning signal Scan failing edge position) time difference H1 it is equal.
It should be noted that be electrically connected with multi-channel gating device between data line and driving chip, driving chip is to data line
When providing data voltage, switch control signal is low level, the branch switch conducting in multi-channel gating device is controlled, to make to drive
The data voltage that chip provides is transmitted in corresponding data line via the branch switch of conducting.The unlatching forward position of scanning signal is
Refer to that switch control signal is jumped low moment, that is, switch control signal failing edge position.
Working principle based on pixel circuit, in the unlatching forward position of scanning signal, that is, switch control signal jump it is low
Moment, transmission has data-signal on data line, until scanning signal failing edge is opened, the data-signal transmitted on data line is just write
Enter pixel circuit, the time difference in unlatching forward position and the second data voltage write time by enabling the second scanning signal Scan ', with
The unlatching forward position of first scanning signal Scan and the time difference of the first data voltage write time are equal, it is ensured that data-signal
The time transmitted on the data line is identical, and then guarantees that the data-signal for being originally written into pixel circuit is identical, avoids by being written
Initial data voltage difference caused by the V that charges to first node N1 under different frequencyDataDifference, and then avoid
First node N1 current potential after charging is different.
Optionally, in order to drive shift register to work normally, exporting it at different frequencies has corresponding pulses wide
The scanning signal of degree, referring again to Fig. 5 and Fig. 6, driving method provided in an embodiment of the present invention further include: scan mould first
Under formula, the first clock signal CK and XCK with the first pulse width W1 is provided to shift register；In the second scan pattern
Under, the second clock signal CK ' and XCK ' with the second pulse width W2 are provided to shift register.
Optionally, driving method provided in an embodiment of the present invention further include: under the first scan pattern, shift register with
Any one first frequency f1 in first frequency section is scanned, shift register each first frequency in first frequency section
The first pulse width W1 of the first scanning signal Scan exported under f1 is identical；Under the second scan pattern, shift register with
Any one second frequency f2 in second frequency section is scanned, shift register each second frequency in second frequency section
The second pulse width W2 of the second scanning signal Scan ' exported under f2 is identical.
Illustratively, first frequency section includes 60Hz~90Hz, under the first scan pattern, shift register with 60Hz~
Any one frequency in 90Hz, as 60Hz or 70Hz are scanned, also, shift register is any one in 60Hz~90Hz
The first pulse width W1 of the first scanning signal Scan exported under a frequency is identical.Second frequency section includes 90Hz~120Hz,
Under the second scan pattern, shift register is with any one frequency in 90Hz~120Hz, as 100Hz or 120Hz are swept
Retouch, also, shift register exported under any one frequency in 90Hz~120Hz the second of the second scanning signal Scan '
Pulse width W2 is identical.
For similar frequency, drive cycle duration is close, and therefore, the current potential of first node N1 is under leakage current effect
Attenuation degree it is also close, that is to say, that multiple frequencies in first frequency section, it is bright even if corresponding pulse width is identical
Difference also very little is spent, almost can be ignored.Therefore, using aforesaid way, enable multiple frequencies in a frequency band corresponding
Pulse width it is identical, when being switched between multiple frequencies in a frequency band, without adjusting pulse width, reduce
The complexity of driving method, improves exploitativeness.
Further, the maximum frequency difference of multiple first frequency f1 in first frequency section be less than or equal to 30Hz, second
The maximum frequency difference of multiple second frequency f2 in frequency band is less than or equal to 30Hz, to avoid maximum frequency in a frequency band
Rate differs larger with minimum frequency, ensure that the corresponding luminance difference of different frequency all very littles in frequency band.
Optionally, when the first scan pattern and the second scan pattern switch, high gray is shown after scan pattern switching
Sub-pixel quantity and whole sub-pixels quantity percentage Y >=50% when, the second pulse width W2 and the first pulse width
The difference of W1 is △ t1；When Y < 50%, the difference of the second pulse width W2 and the first pulse width W1 are △ t2.Due to comparing
In showing low grey menu, when showing high gray picture, brightness change caused by being declined by first node N1 current potential is become apparent,
Therefore, in order to realize a greater degree of compensation to high gray picture, △ t2 < △ t1 can be made.Specifically, can be by rightThe size of middle k is adjusted, and realizes the size of adjustment △ t2 and △ t1.
The embodiment of the invention also provides a kind of display panels, as shown in fig. 7, Fig. 7 is provided by the embodiment of the present invention
The structural schematic diagram of display panel, display panel include shift register 1 and sequence controller 2, wherein shift register 1 is used
In sequentially exporting scanning signal；Sequence controller 2 includes scan pattern control module 3 and pulse control module 4.
Wherein, scan pattern control module 3 is electrically connected with shift register 1, under the first scan pattern, driving to be moved
Bit register 1 is scanned with first frequency f1, under the second scan pattern, drive shift register 1 with second frequency f2 into
Row scanning.Pulse control module 4 is electrically connected with scan pattern control module 3, shift register 1 respectively, in the first scanning
Under mode, the control output of shift register 1 has the first scanning signal of the first pulse distance L1 and the first pulse width W1
Scan, under the second scan pattern, the control output of shift register 1 is with the second pulse distance L2's and the second pulse width W2
Second scanning signal Scan '.Wherein, second frequency f2 is less than first frequency f1, and the second pulse distance L2 is greater than between the first pulse
Away from L1, the second pulse width W2 is greater than the first pulse width W1, also, the μ of △ t≤0.25 s, △ t be the second pulse width W2 and
The difference of first pulse width W1.
In conjunction with the driving method of display panel in above-described embodiment, using display panel provided by the embodiment of the present invention,
When shift register 1 is scanned with different frequencies, pulse control module 4 passes through to the corresponding scanning signal of different frequency
Pulse distance be adjusted, the adjustment to drive cycle duration is realized, so as to make different frequency corresponding scanning letter
Number pulse width be substantially the same, that is, make data-signal be written duration be substantially the same, ensure that the original under different frequency
Beginning brightness is substantially the same, and so that it is only matched a set of regulation data, is not only simplified driving method, is adjusted also without matching again
Data are controlled, splashette phenomenon is avoided the occurrence of.Also, pulse control module 4 passes through further to the corresponding pulse width of different frequency
Subtle adjustment is carried out, so that the corresponding pulse width of upper frequency is less than the corresponding pulse width of lower frequency, moreover it is possible to be effectively improved
The inconsistent problem of light-emitting period first node N1 voltage attenuation degree guarantees that the light emission luminance under different frequency reaches unanimity,
Improve display performance.
Optionally, in order to drive shift register 1 to work normally, exporting it at different frequencies has corresponding pulses wide
The scanning signal of degree, as shown in figure 8, Fig. 8 is another structural schematic diagram of display panel provided by the embodiment of the present invention, when
Sequence controller 2 further includes clock control module 5, clock control module 5 respectively with scan pattern control module 3, shift register 1
Electrical connection, for providing first clock signal with the first pulse width W1 to shift register 1 under the first scan pattern,
Under second scan pattern, the second clock signal with the second pulse width W2 is provided to shift register 1.
The embodiment of the invention also provides a kind of display devices, as shown in figure 9, Fig. 9 is provided by the embodiment of the present invention
The structural schematic diagram of display device, the display device include above-mentioned display panel 100.Wherein, the specific structure of display panel 100
It is described in detail in the above-described embodiments, details are not described herein again.Certainly, display device shown in Fig. 9 is only and shows
Meaning explanation, the display device can be any tool such as mobile phone, tablet computer, laptop, electric paper book or television set
There is the electronic equipment of display function.
The display device as provided by the embodiment of the present invention includes above-mentioned display panel 100, it is filled using the display
It sets, when shift register 1 is scanned with different frequencies, the first pulse width W1 and the second pulse width W2 substantially phase
Together, different frequency only matches a set of regulation data, not only simplifies driving method, regulates and controls data also without matching again,
Avoid the occurrence of splashette phenomenon.Also, it can also be protected by carrying out subtle adjustment to the first pulse width W1 and the second pulse width W2
Light emission luminance under card different frequency reaches unanimity, and improves display performance.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (12)
1. a kind of driving method of display panel characterized by comprising
Under the first scan pattern, driving shift register is scanned with first frequency, has the shift register output
There is the first scanning signal of the first pulse distance and the first pulse width；
Under the second scan pattern, the shift register is driven to be scanned with second frequency, keeps the shift register defeated
Provide the second scanning signal of the second pulse distance and the second pulse width；
Wherein, the second frequency is less than the first frequency, and second pulse distance is greater than first pulse distance, institute
The second pulse width is stated greater than first pulse width, also, the μ of △ t≤0.25 s, △ t is second pulse width and institute
State the difference of the first pulse width.
2. driving method according to claim 1, which is characterized in thatWherein, 0
< k < 2, f1 are the first frequency, and f2 is the second frequency, IoffFor the leakage current of thin film transistor (TFT), IonFor film crystalline substance
The charging current of body pipe.
3. driving method according to claim 2, which is characterized in that
4. driving method according to claim 1, which is characterized in that same grayscale corresponding for same color sub-pixel
Value, the second data voltage of data line is provided under second scan pattern, is provided under first scan pattern
The first data voltage to the data line is equal.
5. driving method according to claim 4, which is characterized in that further include:
It the time difference in the unlatching forward position and the second data voltage write time of second scanning signal, is swept with described first
Unlatching forward position and the time difference of the first data voltage write time for retouching signal are equal.
6. driving method according to claim 1, which is characterized in that further include:
Under first scan pattern, Xiang Suoshu shift register provides, and there is the first clock of first pulse width to believe
Number；
Under second scan pattern, Xiang Suoshu shift register provides, and there is the second clock of second pulse width to believe
Number.
7. driving method according to claim 1, which is characterized in that further include:
Under first scan pattern, the shift register with any one of first frequency in first frequency section into
Row scanning, the first scanning letter that the shift register exports under each first frequency in the first frequency section
Number first pulse width it is identical；
Under second scan pattern, the shift register with any one of second frequency in second frequency section into
Row scanning, the second scanning letter that the shift register exports under each second frequency in the second frequency section
Number second pulse width it is identical.
8. driving method according to claim 7, which is characterized in that multiple first frequencies in the first frequency section
The maximum frequency difference of rate is less than or equal to 30Hz, and the maximum frequency difference of multiple second frequencies in the second frequency section is small
In or equal to 30Hz.
9. driving method according to claim 1, which is characterized in that first scan pattern and the second scanning mould
Formula switching, when Y >=50%, the difference of second pulse width and first pulse width is △ t1；When Y < 50%, institute
The difference for stating the second pulse width and first pulse width is △ t2, △ t2 < △ t1；Y is to show after scan pattern switches
The percentage of the sub-pixel quantity of high gray and the quantity of whole sub-pixels.
10. a kind of display panel characterized by comprising
Shift register, for sequentially exporting scanning signal；
Sequence controller, the sequence controller include:
Scan pattern control module, the scan pattern control module are electrically connected with the shift register, for sweeping first
It retouches under mode, the shift register is driven to be scanned with first frequency, under the second scan pattern, the displacement is driven to post
Storage is scanned with second frequency；
Pulse control module, the pulse control module are electric with the scan pattern control module, the shift register respectively
Connection, under first scan pattern, controlling the shift register output with the first pulse distance and the first arteries and veins
The first scanning signal for rushing width controls the shift register output with the second pulse under second scan pattern
Second scanning signal of spacing and the second pulse width；
Wherein, the second frequency is less than the first frequency, and second pulse distance is greater than first pulse distance, institute
The second pulse width is stated greater than first pulse width, also, the μ of △ t≤0.25 s, △ t is second pulse width and institute
State the difference of the first pulse width.
11. display panel according to claim 10, which is characterized in that the sequence controller further include:
Clock control module, the clock control module are electric with the scan pattern control module, the shift register respectively
Connection is used under first scan pattern, when Xiang Suoshu shift register provides first with first pulse width
Clock signal, under second scan pattern, Xiang Suoshu shift register provides the second clock with second pulse width
Signal.
12. a kind of display device, which is characterized in that including display panel as described in claim 10 or 11.
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