CN109859713A - Driving method and driving circuit of display panel and display device - Google Patents
Driving method and driving circuit of display panel and display device Download PDFInfo
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Abstract
The application discloses a driving method and a driving circuit of a display panel and a display device. The driving method includes the steps of: corresponding to the same data line, acquiring overvoltage data driving information of pixels corresponding to the scanning line of the Nth row according to the data driving information of the pixels corresponding to the scanning line of the Nth row and the scanning line of the Nth-1 row; and driving the pixels corresponding to the N-th row of scanning lines by using the overvoltage data driving information. The scheme obtains the overvoltage data driving information of the pixels corresponding to the N-th scanning line according to the data driving information of the pixels corresponding to the N-2 th scanning line and the N-1 th scanning line, and drives the pixels corresponding to the N-th scanning line by using the overvoltage data driving information so as to drive the next line, thereby ensuring the normal display of the display panel, eliminating the abnormal display phenomenon of the panel during the display and improving the display quality of the display device.
Description
Technical field
This application involves field of display technology more particularly to a kind of driving methods of display panel, driving circuit and display
Device.
Background technique
With the development of display technology, the planes such as liquid crystal display panel (Liquid Crystal Display, LCD) are shown
Device is widely answered mobile phone, TV, individual digital because having many advantages, such as that high image quality, power saving, fuselage is thin and has a wide range of application
The various consumer electrical products such as assistant, digital camera, laptop, desktop computer, become the mainstream in display device.
During liquid crystal display panel driving, since the reaction speed of liquid crystal is limited, it is difficult to be reached within the time of a frame
To expected deflection angle, it can make display brightness that expection be not achieved, dynamic menu shows to trail, to overcome drawbacks described above,
The prior art proposes a kind of overdrive technique (line over driver, line OD), so that liquid crystal is in a relatively short period of time
Reach expected deflecting object.
There is the abnormal phenomenon of display in display panel, this is urgently to be resolved during display.
Summary of the invention
The purpose of the application is to provide the driving method, driving circuit and device of a kind of display panel, to improve because aobvious
Show the display abnormal phenomenon that panel occurs during display.
This application discloses a kind of driving methods of display panel, comprising steps of
Corresponding same root data line, according to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line,
Obtain the over-voltage data-driven information of the corresponding pixel of Nth row scan line；
The corresponding pixel of Nth row scan line is driven using over-voltage data-driven information.
Optionally, the corresponding same root data line, according to the number of N-2 row and the corresponding pixel of N-1 horizontal scanning line
According to activation bit, the step of obtaining the over-voltage data-driven information of the corresponding pixel of Nth row scan line, comprising:
Corresponding same root data line, according to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line,
Obtain the real data activation bit of the corresponding pixel of N-1 horizontal scanning line；
According to the real data activation bit of the corresponding pixel of N-1 horizontal scanning line and the corresponding pixel of Nth row scan line
Data-driven information, obtain the over-voltage data-driven information of the corresponding pixel of Nth row scan line.
Optionally, the corresponding same root data line, according to the number of N-2 row and the corresponding pixel of N-1 horizontal scanning line
According to activation bit, the step of obtaining the over-voltage data-driven information of the corresponding pixel of Nth row scan line, comprising:
When scanning gate signal is converted from N-1 horizontal scanning line to Nth row scan line, corresponding same root data line obtains respectively
The data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line is taken, and according to N-2 row and N-1 horizontal scanning line
The data-driven information of corresponding pixel searches and presets practical look-up table, obtains the reality of the corresponding pixel of N-1 horizontal scanning line
Data-driven information；
According to the real data activation bit of the corresponding pixel of N-1 horizontal scanning line and the corresponding pixel of Nth row scan line
Data-driven information, search preset standard lookup table, obtain the over-voltage data-driven letter of the corresponding pixel of Nth row scan line
Breath.
Optionally, the data line of the display panel is at least according to the length different demarcation of the fanout area cabling of data line
Two display areas；The corresponding default practical look-up table in each display area is different；Under the same terms, the aobvious of wire length is walked in fanout area
Show that the corresponding over-voltage data-driven information in region is greater than the over-voltage data-driven information of the short display area of fanout area cabling.
Optionally, the data line of the display panel is at least according to the length different demarcation of the fanout area cabling of data line
Two display areas；All display areas correspond to the same default practical look-up table, but each display area
It is correspondingly arranged on a look-up table coefficient；The real data activation bit is by obtaining N-2 row and N-1 horizontal scanning line
The data-driven information of corresponding pixel searches and presets practical look-up table, is calculated according to look-up table coefficient；
Under the same terms, the corresponding over-voltage data-driven information in display area that wire length is walked in fanout area is greater than fanout area cabling
The over-voltage data-driven information of short display area.
Optionally, before the progress actuation step according to the data-driven information further include:
Calculate the data-driven information and the corresponding pixel of N-1 horizontal scanning line of N-2 horizontal scanning line corresponding pixel
The difference of data-driven information；
If difference is greater than or equal to preset threshold, start corresponding same root data line, according to N-2 row and N-1 row
The data-driven information of the corresponding pixel of scan line obtains the over-voltage data-driven information of the corresponding pixel of Nth row scan line
Step；
Otherwise, the corresponding picture of Nth row scan line is obtained according to the data-driven information of the corresponding pixel of N-1 horizontal scanning line
The over-voltage data-driven information of element is to drive the display of display panel.
It includes that the driving circuit includes: that a kind of driving circuit, which is also disclosed, in the application
Corresponding same root data line obtains the data-driven letter of N-2 row and the corresponding pixel of N-1 horizontal scanning line respectively
Breath, and according to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line, it searches and presets practical look-up table, take
Obtain the first detecting module of the real data activation bit of the corresponding pixel of N-1 horizontal scanning line；
According to the real data activation bit of the corresponding pixel of N-1 horizontal scanning line and the corresponding pixel of Nth row scan line
Data-driven information, search preset standard lookup table, obtain the over-voltage data-driven letter of the corresponding pixel of Nth row scan line
Second detecting module of breath；
The control module that the corresponding pixel of Nth row scan line is driven with over-voltage data-driven information.
Optionally, the driving circuit further include:
Calculate the data-driven information and the corresponding pixel of N-1 horizontal scanning line of N-2 horizontal scanning line corresponding pixel
The judgment module of the difference of data-driven information；If difference is greater than or equal to preset threshold, start corresponding same root data line,
According to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line, the corresponding pixel of Nth row scan line is obtained
Over-voltage data-driven information the step of；Otherwise, the is obtained according to the data-driven information of the corresponding pixel of N-1 horizontal scanning line
The over-voltage data-driven information of the corresponding pixel of N horizontal scanning line is to drive the display of display panel.
Application also discloses a kind of display device, including the above-mentioned meaning driving circuit and driving circuit driving
Display panel.
Relative to the data-driven information according to the corresponding pixel of N-1 horizontal scanning line to the corresponding picture of Nth row scan line
For element carries out drive scheme, when the scan line due to corresponding to same root data line in display panel is converted, due to turning
There are undercharges during changing, and show this results in the corresponding pixel of scan line and standard requirements are not achieved.This programme according to
The data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line, it is available more quasi- since considerations are more
The over-voltage data-driven information of the true corresponding pixel of Nth row scan line, using over-voltage data-driven information to Nth row scan line
Corresponding pixel is driven the driving in this way to next line, ensure that the normal display of display panel, face when eliminating display
The abnormal show phenomenon of plate improves the display quality of display device.
Detailed description of the invention
Included attached drawing is used to provide that a further understanding of the embodiments of the present application, and which constitute one of specification
Point, presently filed embodiment is illustrated, and come together to illustrate the principle of the application with verbal description.It should be evident that retouching below
Attached drawing in stating is only some embodiments of the present application, for those of ordinary skill in the art, is not paying creativeness
Under the premise of laborious, it is also possible to obtain other drawings based on these drawings.In the accompanying drawings:
Fig. 1 is a kind of schematic diagram of display panel of the embodiment of the application；
Fig. 2 is the schematic diagram of the standard drive signal waveform of the embodiment of the application；
Fig. 3 is the schematic diagram of the actual drive signal waveform of the embodiment of the application；
Fig. 4 is the schematic diagram of the multi-strip scanning line of the embodiment of the application；
Fig. 5 is the schematic diagram of the multi-strip scanning line gray scale variation of the embodiment of the application；
Fig. 6 is a kind of schematic diagram of display device structure of another embodiment of the application；
Fig. 7 is a kind of schematic diagram of display device structure of another embodiment of the application；
Fig. 8 is a kind of schematic diagram of driving circuit of another embodiment of the application；
Fig. 9 is a kind of schematic diagram of driving side's circuit of another embodiment of the application；
Figure 10 is a kind of schematic diagram of driving method step of another embodiment of the application；
Figure 11 is a kind of schematic diagram of driving method step of another embodiment of the application；
Figure 12 is a kind of schematic diagram of driving method step of another embodiment of the application；
Figure 13 is a kind of schematic diagram of driving method step of another embodiment of the application.
Wherein, 1, display device；10, display panel；11, driving circuit；111 judgment modules；112, the first detecting module；
113, the second detecting module；114, control module；20, source driving chip 30, display area；40, data line.
Specific embodiment
It is to be appreciated that term used herein above, disclosed specific structure and function details, it is only for description
Specific embodiment is representative, but the application can be implemented by many alternative forms, be not construed as only
It is limited to the embodiments set forth herein.
In the description of the present application, term " first ", " second " only describe purpose, and should not be understood as indicating relatively important
Property, or implicitly indicate the quantity of indicated technical characteristic.As a result, unless otherwise indicated, " first ", " second " are defined
Feature can explicitly or implicitly include one or more of the features；The meaning of " plurality " is two or more.
Term " includes " and its any deformation, mean and non-exclusive include, it is understood that there may be or it is other one or more features of addition, whole
Number, step, operation, unit, component and/or combination thereof.
In addition, "center", " transverse direction ", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner",
The term of the orientation or positional relationship of the instructions such as "outside" is that orientation or relative positional relationship based on the figure describe, only
Be that the application simplifies description for ease of description, rather than indicate signified device or element must have a particular orientation,
It is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
Furthermore unless specifically defined or limited otherwise, term " installation ", " connected ", " connection " shall be understood in a broad sense, example
Such as it may be fixed connection or may be dismantle connection, or integral connection；It can be mechanical connection, be also possible to be electrically connected
It connects；It can be directly connected, it can also indirectly connected through an intermediary or the connection inside two elements.For ability
For the those of ordinary skill in domain, the concrete meaning of above-mentioned term in this application can be understood as the case may be.
With the continuous development of display technology, with reference to Fig. 1,2,3, Fig. 1 be the simplified diagram of display panel, Fig. 2 with
Fig. 3 is the waveform diagram of standard driving signal, the waveform diagram of actual drive signal, in large-sized display panel respectively
In there are central area and two sides display area show non-uniform phenomenon.The non-uniform phenomenon of this display mainly influence because
Element is the data line of such central display area due to being arranged on the center at display panel edge because of source driving chip
Data line at a distance of source driving chip length compared to two sides display area wants short.Because of central area and two sides viewing area
For the data line cabling in domain there are the difference in length, such track lengths difference leads to data line because the difference that line hinders, makes
Driving voltage and default driving voltage on data line is caused to have differences in turn at the effect of capacitance-resistance, caused whole display
For picture to there is showing non-uniform phenomenon, this phenomenon is particularly evident in the more insufficient machine of some charge ratios.
Applicant once used a kind of not disclosed modification method, specific as follows to solve above-mentioned abnormal phenomenon；With display
For a data wire of panel, the data-driven information and Nth row scan line pair of the corresponding pixel of N-1 horizontal scanning line are used
The overvoltage drive information searching table for the pixel answered, the value found out is as final display output valve, on the display apparatus by face
Plate is divided into n-th region, and different zones are then corresponded to for the poor corresponding scan line overvoltage drive (Line in region that charges
OD intensity) can be strong, otherwise intensity is then weak.Specifically, using the data-driven information of the corresponding pixel of N-1 horizontal scanning line and
The normal data activation bit look-up table of the corresponding pixel of Nth row scan line is searched, and passes through normal data activation bit afterwards
The overvoltage drive signal that look-up table is found out, last output overvoltage driving signal, the corresponding pixel of driving Nth row scan line carry out
Display.
For example, with reference to Fig. 4 and Fig. 5, N-2, N-1 and the Nth row scan line pair of corresponding same root data line
Pixel is answered, when data line successively gives N-2, N-1 and Nth row scan line respective pixel charges.When N-2 horizontal scanning line
Data-driven information corresponds to 0 grayscale to the display data of respective pixel in other words, and the data of N-1 horizontal scanning line respective pixel are driven
Dynamic information is 255 grayscale, when the data-driven information of Nth row scan line respective pixel is 100 grayscale, when charging line by line, and N-2
Horizontal scanning line respective pixel is charged fills to N-1 horizontal scanning line respective pixel, then passes through grayscale look-up table N-2 horizontal scanning line pair
Answering the corresponding N-1 horizontal scanning line respective pixel of pixel to find out value is 255 grayscale, but because of undercharge, practical N-1 row
Scan line respective pixel most Zhongdao not 255 grayscale, may charge only to 240 grayscale when to Nth row scan line respective pixel
When, N-1 horizontal scanning line respective pixel is looked by standard lookup table and corresponds to Nth row scan line respective pixel as the conversion of 255 grayscale
At 100 grayscale, this just generates the Query Value of mistake, because practical N-1 horizontal scanning line respective pixel corresponds to Nth row scan line pair
Answering pixel should be that 100 grayscale are transformed into from 240 grayscale, and it is real that the value of malformed queries will cause the corresponding pixel of Nth row scan line
Border shows mistake.
It should be noted that N indicates a natural number, and N≤3, certain N-2 row can be understood as lastrow scanning
Line, N-1 row can be understood as lastrow scan line, and N can be understood as current horizontal scanning line, be certainly not limited to above-mentioned understanding
Form.
Thus, present inventor has carried out following improvement to this:
Below with reference to the accompanying drawings it elaborates with optional embodiment to the application.
As shown in figs. 6 or 7, as the embodiment of the application, a kind of display device 1 is disclosed, the display device 1 is wrapped
Include the display panel 10 of driving circuit 11 and driving circuit driving 11.
Specifically, as shown in figure 8, an embodiment as the application, discloses a kind of driving circuit 11, the driving electricity
Road 11 includes:
Corresponding same root data line obtains the data-driven letter of N-2 row and the corresponding pixel of N-1 horizontal scanning line respectively
Breath, and according to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line, it searches and presets practical look-up table, take
Obtain the first detecting module 112 of the real data activation bit of the corresponding pixel of N-1 horizontal scanning line；It is scanned according to N-1 row
The real data activation bit of the corresponding pixel of line and the data-driven information of the corresponding pixel of Nth row scan line are searched default
Standard lookup table, obtain the second detecting module 113 of the over-voltage data-driven information of the corresponding pixel of Nth row scan line；Make
The control module 114 that the corresponding pixel of Nth row scan line is driven with over-voltage data-driven information.
Wherein, the output end of output end the second detecting module 113 of coupling of first detecting module 112, described second
The output end of detecting module 113 is coupled in the input terminal of the control module 114, the output end coupling of the control module 114
In the corresponding pixel of Nth row scan line.By the first detecting module 112 with the second detecting module 113 to the corresponding of scan line
The amendment of the over-voltage data-driven information of pixel makes driving to standard for each scan line respective pixel, ensure that display surface
The whole good display effect of plate 1, improves the display quality of display panel 1.
In addition, Fig. 9 is the drive circuit schematic diagram for being provided with judgment module with reference to Fig. 9；The driving circuit 11 includes
Judgment module 111, the judgment module 111 can calculate the data-driven information and of the corresponding pixel of N-2 horizontal scanning line
The difference of the data-driven information of the corresponding pixel of N-1 horizontal scanning line；If difference is greater than or equal to preset threshold, start to correspond to
Same root data line obtains Nth row scanning according to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line
The step of over-voltage data-driven information of the corresponding pixel of line；Otherwise, it is driven according to the data of the corresponding pixel of N-1 horizontal scanning line
Dynamic information obtains the over-voltage data-driven information of the corresponding pixel of Nth row scan line to drive the display of display panel 10.
As shown in Figure 10, as another embodiment of the application, a kind of driving method of display panel, the drive are disclosed
Dynamic method comprising steps of
S1: corresponding same root data line is believed according to the data-driven of N-2 row and the corresponding pixel of N-1 horizontal scanning line
Breath obtains the over-voltage data-driven information of the corresponding pixel of Nth row scan line；
S2: the corresponding pixel of Nth row scan line is driven using over-voltage data-driven information.
Relative to the data-driven information according to the corresponding pixel of N-1 horizontal scanning line to the corresponding picture of Nth row scan line
For element carries out drive scheme, when the scan line due to corresponding to same root data line in display panel is converted, due to turning
There are undercharges during changing, and show this results in the corresponding pixel of scan line and standard requirements are not achieved.This programme according to
The data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line obtains the mistake of the corresponding pixel of Nth row scan line
Data-driven information is pressed, the corresponding pixel of Nth row scan line is driven in this way to next using over-voltage data-driven information
Capable driving ensure that the normal display of display panel, the abnormal show phenomenon of panel when eliminating display, improve display dress
The display quality set.
If specifically, display panel between each frame have intrinsic initial data voltage or previous frame last
The real data activation bit of the corresponding pixel of horizontal scanning line, then we can be according to the initial data voltage or previous frame most
The real data activation bit of the corresponding pixel of latter horizontal scanning line tests to obtain the reality of the corresponding pixel of the first horizontal scanning line
Look-up table and corresponding over-voltage data-driven information；And the corresponding picture of the first horizontal scanning line can be obtained according to practical look-up table
The real data activation bit of element, to obtain the over-voltage data-driven information of the corresponding pixel of the second horizontal scanning line.
The initial data voltage if it does not exist, then correspond to the corresponding pixel of scan line of same root data line, and the first row is swept
It retouches the corresponding pixel of line and can carry out driving according to data-driven information and show, and the second horizontal scanning line can be according to the first row institute
The data-driven information of the corresponding pixel of the first horizontal scanning line is stated, corresponding overvoltage drive is directly searched according to standard lookup table and is believed
Breath is to be driven.Certainly, if other modes be applicable in it is also possible.
Specifically, the corresponding same root data line is corresponding according to N-2 row and N-1 horizontal scanning line with reference to Figure 11
The data-driven information of pixel, the step of obtaining the over-voltage data-driven information of the corresponding pixel of Nth row scan line include:
S11: corresponding same root data line is believed according to the data-driven of N-2 row and the corresponding pixel of N-1 horizontal scanning line
Breath obtains the real data activation bit of the corresponding pixel of N-1 horizontal scanning line；
S12: corresponding according to the real data activation bit of the corresponding pixel of N-1 horizontal scanning line and Nth row scan line
The data-driven information of pixel obtains the over-voltage data-driven information of the corresponding pixel of Nth row scan line.
It is corresponding according to N-2 row and N-1 horizontal scanning line since there are undercharges in over-voltage conversion process for scan line
The data-driven information of pixel obtains the real data activation bit of the corresponding pixel of N-1 horizontal scanning line, real data driving
Information is the important evidence reacted pixel and show state, is then driven according to the real data of the corresponding pixel of N-1 horizontal scanning line
The data-driven information of dynamic information and the corresponding pixel of Nth row scan line, obtains the over-voltage number of the corresponding pixel of Nth row scan line
According to activation bit, this avoid the corresponding pixels of Nth row scan line to be driven according to the data-driven information of mistake, to the
The corresponding pixel of N horizontal scanning line plays the role of Crust ma- terial, and the phenomenon for avoiding the appearance display of display panel abnormal improves aobvious
Show the quality of panel.
In one embodiment, with reference to Figure 12, the corresponding same root data line, according to N-2 row and N-1 horizontal scanning line
The step of data-driven information of corresponding pixel, the over-voltage data-driven information of the corresponding pixel of acquirement Nth row scan line, wraps
It includes:
S110: when scanning gate signal is converted from N-1 horizontal scanning line to Nth row scan line, corresponding same root data line, point
The data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line is not obtained, and is swept according to N-2 row and N-1 row
The data-driven information of the corresponding pixel of line is retouched, searches and presets practical look-up table, obtains the corresponding pixel of N-1 horizontal scanning line
Real data activation bit；
S120: corresponding according to the real data activation bit of the corresponding pixel of N-1 horizontal scanning line and Nth row scan line
The data-driven information of pixel searches preset standard lookup table, and the over-voltage data for obtaining the corresponding pixel of Nth row scan line are driven
Dynamic information.
The standard overvoltage drive value of Nth row is the real data activation bit and N of the corresponding pixel of N-1 horizontal scanning line
The data-driven information of the corresponding pixel of horizontal scanning line searches preset standard lookup table, to a number corresponding in display panel
When according to being converted for the fine scanning line of line, since there are undercharges in conversion process for the scan line do not gone together, if
The over-voltage data-driven information for driving Nth row is searched with the preset standard look-up table of N-1 row, then N-1 row
When standard gray scale value is not achieved due to undercharge, standard that Nth row is still found using the preset standard look-up table of N-1 row
Data-driven information, it would be possible that generating a wrong normal data activation bit, Nth row is driven with the standard gray scale of this mistake
When dynamic value carries out grayscale display, the phenomenon of display mistake will occur, cause display device display picture occur and colour cast occur
Phenomenon substantially reduces the display quality of the device of display in this way, equally brings the low-quality viewing experience of user.
When data line successively gives N-2, N-1 and Nth row scan line respective pixel charges, when N-2 row scans
The display data of line respective pixel is 0 grayscale, and N-1 is 255 grayscale, when Nth row scan line respective pixel is 100 grayscale, by
When row charging, N-2 horizontal scanning line respective pixel is charged fills to N-1 horizontal scanning line respective pixel, then passes through grayscale look-up table
It is 255 grayscale that the corresponding N-1 horizontal scanning line respective pixel of N-2 horizontal scanning line respective pixel, which finds out value, but because charging
Deficiency, practical N-1 horizontal scanning line respective pixel most Zhongdao not 255 grayscale, may pass through in this way reality only to 240 grayscale
The actual gray value that look-up table finds out N-1 horizontal scanning line respective pixel is 240, then corresponding using N-1 horizontal scanning line
240 grayscale of pixel is searched with standard lookup table, finds out the standard overvoltage drive letter of Nth row scan line respective pixel standard
Number, finally Nth row scan line respective pixel is driven according to standard overvoltage drive signal.This avoid Nth row scannings
The corresponding pixel of line is shown according to the over-voltage data-driven information of mistake, ensure that the display quality of display panel, is optimized
The viewing experience of user.
In addition, the data line of the display panel is at least two according to the length different demarcation of the fanout area cabling of data line
A display area；The corresponding default practical look-up table in each display area is not identical；Under the same terms, the aobvious of wire length is walked in fanout area
Show that the corresponding over-voltage data-driven information in region is greater than the over-voltage data-driven information of the short display area of fanout area cabling.Or
Person, the corresponding default practical look-up table in each display area is identical, and during overvoltage drive, a driving intensity coefficient is arranged,
The corresponding driving intensity coefficient in display area that wire length is walked in the fanout area is greater than the driving of the short display area of fanout area cabling
Strength factor can reduce the capacitance-resistance effect (RC delay) between different data line in this way, so that the aobvious of wire length is walked in fanout area
Show that region shows that difference reduces with the short display area of fanout area cabling, improves the display effect of shell display panel, optimization in this way
The viewing experience of user.
Certainly, all display areas correspond to the same default practical look-up table, but each display area
It is correspondingly arranged on a look-up table coefficient；The real data activation bit is by obtaining N-2 row and N-1 horizontal scanning line
The data-driven information of corresponding pixel searches and presets practical look-up table, is calculated according to look-up table coefficient；Same condition
Under, the corresponding over-voltage data-driven information in display area that wire length is walked in fanout area is greater than the mistake of the short display area of fanout area cabling
Press data-driven information.Different or different practical look-up tables can be arranged in those skilled in the art according to the demand of itself.
The practical look-up table is obtained according to preparatory experiment, specifically, corresponding each group of N-2 row and N-1 row
The data-driven information of the corresponding pixel of scan line, at least experiment preset times are corresponding to obtain N-1 horizontal scanning line respectively
The actual gray brightness of pixel；The average value for calculating actual gray brightness generates real data activation bit according to average value；It is complete
After all groups of experiments, practical look-up table is generated.
Practical look-up table is obtained by experiment, and at least experiment preset times are respectively to obtain N-1 horizontal scanning line pair
The actual gray brightness for the pixel answered,；In addition then according to the practical look-up table that obtains for the information for obtaining actual displayed situation, meter
The average value for calculating actual gray brightness generates real data activation bit according to average value；After completing all groups of experiments, generate real
Border look-up table.The random optical noise that crossing in this way can be reduced in experimental situation influences, so that random source noise reduces, obtained reality
Actual gray brightness value under the look-up table closing to reality state of border, so that the corresponding pixel of Nth row scan line in the follow-up process
Shown picture more close to the display picture under standard dress state, guarantees the normal display of display panel, improves display surface
The quality of plate.
Specifically, the number of experiment can be 5 to 20 times, and actual gray value and the reality for obtaining pixel within this range are aobvious
Show that grayscale value is close, in addition obtains more experimental data in experiment and need to spend time cost, can save within this range
It makes an appointment cost.Certain those skilled in the art can have more the number for itself needing regulation experiment.
In one embodiment, with reference to Figure 13, it is described actuation step is carried out according to the data-driven information before further include:
S0: the data-driven information and the corresponding pixel of N-1 horizontal scanning line of the corresponding pixel of N-2 horizontal scanning line are calculated
Data-driven information difference；
If difference is greater than or equal to preset threshold, start corresponding same root data line, according to N-2 row and N-1 row
The data-driven information of the corresponding pixel of scan line obtains the over-voltage data-driven information of the corresponding pixel of Nth row scan line
Step S1；
If difference is less than preset threshold, Nth row is obtained according to the data-driven information of the corresponding pixel of N-1 horizontal scanning line
The over-voltage data-driven information of the corresponding pixel of scan line is to drive the display of display panel.
In the conversion of N-2 row, N-1 row and Nth row scan line, if the N-2 horizontal scanning line and N-1 row of conversion
The difference of the data-driven value of information corresponding to scan line is too close, if making the operation of row overvoltage drive at this time, it is abnormal to may cause appearance
The case where display, such as be overcharged with electricity, bright spot or the non-uniform situation of local display are caused, according to N-1 horizontal scanning line pair
The data-driven information for the pixel answered obtains the over-voltage data-driven information of the corresponding pixel of Nth row scan line to drive display surface
The display of plate, it is possible to reduce the workload of overvoltage drive improves the display speed of display panel, and it is abnormal to avoid the occurrence of smear etc.
Phenomenon improves the quality of display panel.
It is of course also possible to using the method that other judge, such as:
By the standard gray scale value of the absolute value of the actual gray value of the corresponding pixel of N-2 horizontal scanning line and N-1 row
Absolute value compares the similarity for obtaining the two；
Judge whether the similarity is greater than or equal to a preset threshold；
When the similarity is greater than or equal to the preset threshold, then it is assumed that the similarity of current line and next line is to connect
Closely, overvoltage drive is closed；
When the similarity is less than the preset threshold, then it is assumed that the corresponding pixel of N-2 horizontal scanning line and N-1 row
The similarity of the display grayscale value row of scan line respective pixel is that difference is big, starts overvoltage drive.
Specifically, the similarity can be calculated by following formula and be obtained:
Wherein Smilar (H) indicates that similarity value, N-2 indicate N-
The actual gray value of 2 rows；The standard gray scale value of N-1 expression N-1 row.
It should be noted that the value range of the preset threshold is 90%-100%.In the present solution, current practical ash
It is 90%-100% that order value and the similarity of next line, which are greater than or wait the preset threshold value range, it may be considered that adjacent
The grayscale numerical value of the display of the needs of two rows is equal, within this range can be to avoid the gray number of output required for two adjacent rows
Value difference is different big, causes the non-uniform abnormal phenomenon of display device local display, improves the display effect of display device.
Finally, driving method described herein also can be applied to frame overvoltage drive (Frame over driver,
Frame OD) technology in, steps are as follows for corresponding driving method:
When showing that picture is converted from N-1 frame picture to nth frame picture, N-2 frame picture and N-1 frame are obtained respectively
The data-driven information of picture respective pixel, and believed according to the data-driven of N-2 frame picture and N-1 frame picture respective pixel
Breath is searched and presets practical look-up table, and the real data activation bit of N-1 row frame picture pixel is obtained；
The real data activation bit of pixel and the data of the corresponding pixel of nth frame picture are driven according to N-1 frame picture
Dynamic information, searches preset standard lookup table, obtains the over-voltage data-driven information of the corresponding pixel of nth frame picture；
Nth frame picture respective pixel is driven using over-voltage data-driven information.
It can guarantee display panel in this way when frame and frame switch, display picture respective pixel is correctly driven,
It avoids display panel from the abnormal phenomenon of display occur, improves the quality of display panel；Between row and row, between frame and frame, all
Pay attention to eliminating the data-driven information situation different with real data activation bit, further prevented calculating benchmark different and
So that obtain over-voltage data-driven Asymmetry information and bring picture display problem.
It should be noted that the restriction for each step being related in this programme, in the premise for not influencing concrete scheme implementation
Under, it does not regard as being can be the step of making restriction to step sequencing, write on front what is first carried out, be also possible to
It executes, is possibly even performed simultaneously afterwards, as long as this programme can be implemented, all shall be regarded as belonging to the protection model of the application
It encloses.
The panel of the application can be TN (full name is Twisted Nematic, i.e. twisted nematic) flexible panel, VA
(Vertical Alignment, vertical orientation) flexible panel or MVA (Multi-domain Vertical Alignment, it is more
Quadrant vertical orientation) flexible panel, it is of course also possible to be other kinds of flexible panel, it is applicable.
The above content is combine specific optional embodiment to made by the application further description, and it cannot be said that
The specific implementation of the application is only limited to these instructions.For those of ordinary skill in the art to which this application belongs, exist
Under the premise of not departing from the application design, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the application's
Protection scope.
Claims (10)
1. a kind of driving method of display panel, which is characterized in that comprising steps of
Corresponding same root data line is obtained according to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line
The over-voltage data-driven information of the corresponding pixel of Nth row scan line；And
The corresponding pixel of Nth row scan line is driven using over-voltage data-driven information；
Wherein, N indicates a natural number, and N≤3.
2. a kind of driving method of display panel according to claim 1, which is characterized in that the corresponding same root data
Line obtains the corresponding picture of Nth row scan line according to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line
Element over-voltage data-driven information the step of include:
Corresponding same root data line is obtained according to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line
The real data activation bit of the corresponding pixel of N-1 horizontal scanning line；And
According to the number of the real data activation bit of the corresponding pixel of N-1 horizontal scanning line and the corresponding pixel of Nth row scan line
According to activation bit, the over-voltage data-driven information of the corresponding pixel of Nth row scan line is obtained.
3. a kind of driving method of display panel according to claim 1, which is characterized in that the corresponding same root data
Line obtains the corresponding picture of Nth row scan line according to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line
Element over-voltage data-driven information the step of include:
When scanning gate signal is converted from N-1 horizontal scanning line to Nth row scan line, corresponding same root data line obtains the respectively
The data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line, and it is corresponding according to N-2 row and N-1 horizontal scanning line
Pixel data-driven information, search and preset practical look-up table, the real data of the corresponding pixel of acquirement N-1 horizontal scanning line
Activation bit；And
According to the number of the real data activation bit of the corresponding pixel of N-1 horizontal scanning line and the corresponding pixel of Nth row scan line
According to activation bit, preset standard lookup table is searched, obtains the over-voltage data-driven information of the corresponding pixel of Nth row scan line.
4. a kind of driving method of display panel according to claim 1 to 3, which is characterized in that the display
The data line of panel is at least two display areas according to the length different demarcation of the fanout area cabling of data line；
The corresponding default practical look-up table in each display area is different；
Under the same terms, it is short that the corresponding over-voltage data-driven information in display area that wire length is walked in fanout area is greater than fanout area cabling
The over-voltage data-driven information of display area.
5. a kind of driving method of display panel according to claim 1 to 3, which is characterized in that the display
The data line of panel is at least two display areas according to the length different demarcation of the fanout area cabling of data line；
All display areas correspond to the same default practical look-up table, but each display area is correspondingly arranged on
One look-up table coefficient；
The real data activation bit is the data-driven by obtaining N-2 row and the corresponding pixel of N-1 horizontal scanning line
Information searches and presets practical look-up table, is calculated according to look-up table coefficient；
Under the same terms, it is short that the corresponding over-voltage data-driven information in display area that wire length is walked in fanout area is greater than fanout area cabling
The over-voltage data-driven information of display area.
6. a kind of driving method of display panel according to claim 3, which is characterized in that the practical look-up table is root
It is obtained according to preparatory experiment.
7. a kind of driving method of display panel according to claim 1, which is characterized in that described to be driven according to the data
Dynamic information further includes step before carrying out actuation step:
Calculate the data-driven information of the corresponding pixel of N-2 horizontal scanning line and the data of the corresponding pixel of N-1 horizontal scanning line
The difference of activation bit；
If difference is greater than or equal to preset threshold, starts corresponding same root data line, scanned according to N-2 row and N-1 row
The step of data-driven information of the corresponding pixel of line, the over-voltage data-driven information of the corresponding pixel of acquirement Nth row scan line；
Otherwise, the corresponding pixel of Nth row scan line is obtained according to the data-driven information of the corresponding pixel of N-1 horizontal scanning line
Over-voltage data-driven information is to drive the display of display panel.
8. a kind of driving circuit of display panel, which is characterized in that the driving circuit includes:
First detecting module, corresponding same root data line obtain N-2 row and the corresponding pixel of N-1 horizontal scanning line respectively
Data-driven information, and according to the data-driven information of N-2 row and the corresponding pixel of N-1 horizontal scanning line, it searches default real
Border look-up table obtains the real data activation bit of the corresponding pixel of N-1 horizontal scanning line；
Second detecting module, according to the real data activation bit and Nth row scan line pair of the corresponding pixel of N-1 horizontal scanning line
The data-driven information for the pixel answered searches preset standard lookup table, obtains the over-voltage number of the corresponding pixel of Nth row scan line
According to activation bit；
Control module drives the corresponding pixel of Nth row scan line with over-voltage data-driven information.
9. a kind of driving circuit of display panel according to claim 8, which is characterized in that the driving circuit includes:
Judgment module calculates the data-driven information and the corresponding picture of N-1 horizontal scanning line of the corresponding pixel of N-2 horizontal scanning line
The difference of the data-driven information of element；
If difference is greater than or equal to preset threshold, starts corresponding same root data line, scanned according to N-2 row and N-1 row
The step of data-driven information of the corresponding pixel of line, the over-voltage data-driven information of the corresponding pixel of acquirement Nth row scan line；
Otherwise, the corresponding pixel of Nth row scan line is obtained according to the data-driven information of the corresponding pixel of N-1 horizontal scanning line
Over-voltage data-driven information is to drive the display of display panel.
10. a kind of display device, which is characterized in that including driving circuit described in claim 8-9 any one and the drive
The display panel of dynamic circuit drives.
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Application publication date: 20190607 |