CN114281202B - Display panel driving method and display panel - Google Patents
Display panel driving method and display panel Download PDFInfo
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Abstract
The invention discloses a driving method of a display panel and the display panel, wherein the driving method of the display panel comprises the following steps: in m adjacent frame pictures, the scanning mode of at least one frame picture is a first scanning mode, the scanning mode of at least one frame picture is a second scanning mode, m is more than or equal to 2, and m is a positive integer, wherein in the first scanning mode, each frame picture comprises N grid line scanning stages and N touch scanning stages, each touch scanning stage is adjacent to each grid line scanning stage, N is more than or equal to 2, and N is a positive integer; in the second scanning mode, each frame of picture is scanned only to comprise 1 grid line scanning stage and 1 touch scanning stage. The invention improves the charging capability of the display panel and improves the display performance of the display panel.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving method of a display panel and a display panel.
Background
With rapid development of display technology, touch display technology has gradually spread throughout people's lives. The touch display panel allows a user to directly use his hands or by means of foreign objects, and then can input user instructions by selecting displayed contents. When a user touches the touch display panel with hands or foreign objects, the touch display panel can detect touch points and drive the touch display device according to input instructions so as to realize specific display.
In an In-Cell (In-Cell) touch display panel, in order to prevent mutual interference between display and touch, it is common practice to drive display and touch at different times within a display time of one frame of display screen, and to insert a plurality of touch display stages into one frame of display screen.
Disclosure of Invention
In view of the above, the present invention provides a driving method of a display panel and a display panel, which are used for increasing the charging time of pixels and improving the uneven display problem of the display panel.
In one aspect, the present invention provides a driving method of a display panel, wherein at least one frame of m adjacent frames is scanned in a first scanning mode, at least one frame of frames is scanned in a second scanning mode, m is greater than or equal to 2, and m is a positive integer,
in the first scanning mode, each frame of picture is scanned and comprises N grid line scanning stages and N touch scanning stages, wherein each touch scanning stage is adjacent to each grid line scanning stage, N is more than or equal to 2, and N is a positive integer;
in the second scanning mode, each frame of picture is scanned only including 1 grid line scanning stage and 1 touch scanning stage.
On the other hand, the invention also provides a display panel, which comprises a plurality of grid lines extending along the row direction and a plurality of data lines extending along the column direction, wherein the grid lines and the data lines are crossed to define a pixel area, the pixel area comprises pixels, the pixels form a pixel row along the row direction, the display panel also comprises a plurality of public electrode lines, and the public electrode lines are multiplexed into a touch control line;
at least one frame of m adjacent frames is scanned in a first scanning mode, at least one frame of frames is scanned in a second scanning mode, m is more than or equal to 2, and m is a positive integer,
in the first scanning mode, each frame of picture is scanned and comprises N grid line scanning stages and N touch scanning stages, wherein each touch scanning stage is adjacent to each grid line scanning stage, N is more than or equal to 2, and N is a positive integer;
in the second scanning mode, each frame of picture is scanned only including 1 grid line scanning stage and 1 touch scanning stage.
Compared with the prior art, the driving method of the display panel and the display panel provided by the invention have the advantages that at least the following effects are realized:
in the invention, m adjacent frame pictures comprise a first scanning mode and a second scanning mode, wherein each frame picture comprises N grid line scanning stages and N touch scanning stages in the first scanning mode, and each frame picture comprises only 1 grid line scanning stage and 1 touch scanning stage in the second scanning mode, on one hand, the number of the touch scanning stages in each frame picture is reduced, so that the time for scanning each row of grid lines in the grid line scanning stages is increased, the charging time of corresponding pixels is prolonged, the charging capability of pixels in a display panel is improved, and the uneven display problem of the display panel is improved; on the other hand, the touch scanning frequencies of the first scanning mode and the second scanning mode can be the same or different, so that the touch scanning frequency can be adapted to different touch scanning frequencies through the collocation of the first scanning mode and the second scanning mode, and the application range is wider.
Of course, it is not necessary for any one product embodying the invention to achieve all of the technical effects described above at the same time.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a timing diagram of each frame of a prior art display;
FIG. 2 is a flow chart of a driving method of a display panel according to the present invention;
FIG. 3 is a timing diagram of a display panel according to the present invention;
FIG. 4 is a schematic plan view of a display panel according to the present invention;
FIG. 5 is a timing diagram of driving a display panel according to another embodiment of the present invention;
FIG. 6 is a diagram of a display period of a frame according to the present invention;
FIG. 7 is a diagram of another exemplary display period;
FIG. 8 is a diagram of another exemplary display period;
FIG. 9 is a diagram of another exemplary display period;
FIG. 10 is a diagram of another exemplary display period;
fig. 11 is a diagram of still another screen display period according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In view of the fact that the driving method of the display panel in the prior art has short pixel charging time and insufficient pixel charging capability, and the display panel has uneven display, the present inventors have conducted the following study on the driving method of the display panel in the prior art.
Referring to fig. 1, fig. 1 is a timing diagram of each frame of the prior art, in fig. 1, a frame of the prior art has N gate line scanning phases K1' and N touch scanning phases K2', one gate line scanning phase K1' is immediately followed by one touch scanning phase K2', that is, a frame of the prior art is scanned in a driving manner of K1' K2' … K1' K2', STV in fig. 1 is a trigger signal, CKV is a clock signal line, time of each touch scanning phase K2' is equal to a first phase T1, a second phase T2, a third phase T3, the first phase and the third phase are blank periods, in the second stage, when the time of one frame of picture is Tx, the scanning time of each row of grid lines in the grid line scanning stage K1' is T1, and N grid line scanning stages K1' and N touch scanning stages K2' are provided, so tx= (hx T1/n+t1+t2+t3) ×n, and thus the scanning time T1= [ Tx- (t1+t2+t3) ×n ]/H of each row of grid lines in the grid line scanning stage K1' is smaller, the charging time of the pixels is insufficient, and uneven display of the display panel is caused.
Referring to fig. 2, 3 and 4, fig. 2 is a flowchart of a driving method of a display panel according to the present invention, fig. 3 is a driving timing chart of a display panel according to the present invention, and fig. 4 is a schematic plan view of a display panel according to the present invention.
The driving method of the display panel comprises the following steps: in m adjacent frame pictures, the scanning mode of at least one frame picture is a first scanning mode Q1, the scanning mode of at least one frame picture is a second scanning mode Q2, m is more than or equal to 2, and m is a positive integer, wherein in the first scanning mode Q1, each frame picture is scanned and comprises N grid line scanning stages K11 and N touch scanning stages K21, each touch scanning stage K21 is adjacent to each grid line scanning stage K11, wherein N is more than or equal to 2, and N is a positive integer; in the second scanning mode Q2, each frame of image includes only 1 gate line scanning stage K12 and 1 touch scanning stage K22.
In fig. 2, only 2 adjacent frames are schematically shown, wherein the scanning mode of one frame is a first scanning mode Q1, and the scanning mode of the other frame is a second scanning mode Q2, it can be understood that the first scanning mode Q1 scans one frame with N grid line scanning stages K11 and N touch scanning stages K21, and the touch scanning stage K21 is located after the grid line scanning stages K11, that is, the touch scanning stage K21 is inserted between the grid line scanning stages K11; in the second scanning mode Q2, only one gate line scanning stage K12 and one touch scanning stage K22 are provided for each frame of image, although fig. 3 only shows that the touch scanning stage K22 is located after the gate line scanning stage K12, and of course, the touch scanning stage K22 may also be located before the gate line scanning stage K12, which is not limited herein. It should be noted that, N is a positive integer greater than or equal to 2, fig. 3 shows a case where the number of the gate line scanning phases K11 and the touch scanning phases K21 in the first scanning mode Q1 is greater than 3, which is not particularly limited herein.
Referring to fig. 4, in the first scanning mode Q1, the time of each touch scanning stage K21 is equal to the pit in time T1, the touch detection time T2, and the pit out time T3, and H gate lines are provided, and if the time of one frame of picture is Tx, the scanning time of each row of gate lines in the gate line scanning stage K11 is T1, and N gate line scanning stages K11 and N touch scanning stages K21 are provided, so tx= (hxt1/n+t1+t2+t3) ×n, and thus the scanning time t1= [ Tx- (t1+t2+t3) ×n ]/H of each row of gate lines in the gate line scanning stage K11 can be known; in the second scanning mode Q2, the time of the touch scanning stage K22 is equal to the pit in time T1, the touch detection time n×t2, and the pit out time T3, and H gate lines are provided, and if the time of one frame of picture is still Tx, the scanning time of each row of gate lines in the gate line scanning stage K12 is T2, and in the second scanning mode Q2, there are only 1 gate line scanning stage K11 and 1 touch scanning stage K21, so tx=h× t2+t1+t2×n+t3, and thus it can be known that the scanning time t2= [ Tx- (t1+t2×n+t3) ]/H of each row of gate lines in the gate line scanning stage K11.
In summary, the difference Δt=t2—t1= (t1+t3) × (N-1)/H between the scanning time T2 of each row of the gate line in the second scanning mode Q2 and the scanning time T1 of each row of the gate line in the first scanning mode Q1 is known to be greater than 0, so that Δt is greater than 0, the scanning time T2 of each row of the gate line in the second scanning mode Q2 is greater than the scanning time T1 of each row of the gate line in the first scanning mode Q1, and therefore, the charging time of the pixel in the second scanning mode Q2 is greater than the charging time of the pixel in the first scanning mode Q1.
In some alternative embodiments, the number of frames scanned in the second scan pattern Q2 is greater than or equal to the number of frames scanned in the first scan pattern Q1.
Note that, when the number of frames scanned in the second scanning mode Q2 is greater than the number of frames scanned in the first scanning mode Q1 among the m frames, the pixel charging time can be made sufficient.
Meanwhile, when all m frames of images are scanned in the second scanning mode Q2, the pixel charging time is longest, but the requirement of higher touch scanning frequency cannot be met, specifically, the second scanning mode Q2 only has one touch scanning stage, so the frequency of the grid line scanning stage in the second scanning mode Q2 and the frequency of the touch scanning stage can only be equal, for example, the frequency of the grid line scanning stage in the second scanning mode Q2 is 90HZ, and the frequency of the touch scanning in the second scanning mode Q2 is also 90HZ; however, when the frequency of the touch scanning stage is greater than the frequency of the gate line scanning, for example, when the display panel is required to be frequently subjected to touch operations such as game operations, the frequency of the gate line scanning stage is required to be 90HZ, and the frequency of the touch scanning is required to be 135HZ, then the higher touch frequency requirement cannot be met by only adopting the second scanning mode Q2 to scan in all frames; because the first scanning mode Q1 is provided with a plurality of touch scanning stages, the touch scanning frequency can reach higher, and when the frequency of the grid line scanning in the first scanning mode Q1 is 90HZ, the touch scanning frequency can reach 180HZ, so that the number of the first scanning mode Q1 and the second scanning mode Q2 in the adjacent m frames of pictures are reasonably matched, the purposes that the frequency of the grid line scanning stage is 90HZ and the frequency of the touch scanning is 135HZ can be realized, the touch scanning frequency is suitable for different touch scanning frequency requirements, and the application range is wider.
According to the invention, the scanning mode of at least one frame of pictures is the second scanning mode Q2, so that the pixel charging time can be increased, the display time is increased, and meanwhile, the number of the frames scanned by the first scanning mode Q1 and the number of the frames scanned by the second scanning mode Q2 are calculated and matched, so that the touch control scanning frequency of different requirements can be adapted, and the application range is wider.
Based on the same inventive concept, referring to fig. 4, the present invention further provides a display panel, wherein the display panel 100 includes a plurality of gate lines G extending in a row direction X, a plurality of data lines S extending in a column direction Y, the gate lines G and the data lines S cross to define a pixel region, the pixel region includes pixels P, a plurality of pixels form a pixel row along the row direction X, the display panel 100 further includes a plurality of common electrode lines 4, and the common electrode lines 4 are multiplexed into a touch line TX;
at least one frame of m adjacent frames is scanned in a first scanning mode Q1, at least one frame of frames is scanned in a second scanning mode Q2, m is more than or equal to 2, and m is a positive integer,
in the first scanning mode Q1, each frame of picture is scanned and comprises N grid line scanning stages and N touch scanning stages, wherein each touch scanning stage is adjacent to each grid line scanning stage, N is more than or equal to 2, and N is a positive integer;
in the second scanning mode Q2, each frame of image includes only 1 gate line scanning stage and 1 touch scanning stage.
The display panel is also shown in fig. 4 with a plurality of cascaded shift registers VSR, which are clocked by clock signal lines CKV1 and CKV2, and the gate lines G (G1-G8), and the data lines S are schematically shown in fig. 4, although the number of gate lines G and data lines S is only schematically illustrated here, the gate lines G and data lines S cross to define a pixel region, with pixels P in the pixel region, and a plurality of pixels in the row direction X forming a pixel row, and of course with a drive transistor TFT in the pixel region, the gate of the drive transistor TFT being electrically connected to the gate line G, the source of the drive transistor TFT being electrically connected to the data line S, the drain of the drive transistor TFT being electrically connected to the pixel electrode, where the drain of the drive transistor TFT may be electrically connected to the pixel electrode.
Also shown in fig. 4 are a plurality of common electrodes 1, the common electrodes 1 being multiplexed as touch electrodes 2, and the common electrode lines 4 being multiplexed as touch lines TX, the touch lines TX being electrically connected with the common electrodes 1 through vias. Fig. 4 also shows a driving chip IC to which the data line S, the common electrode line 4, and the clock signal lines CKV1, CKV2 are electrically connected. In this embodiment, the touch scanning and the display scanning are performed in a time-sharing manner, when the display scanning is performed, the driving chip IC needs to provide a common electrode signal required for display for the common electrode 1 through the common electrode line 4, and when the touch scanning is performed, the driving chip IC needs to provide a touch scanning signal required for touch for the common electrode 1 through the common electrode line 4.
In m adjacent frame images of the display panel in the embodiment, the scanning mode of at least one frame image is a first scanning mode Q1, the scanning mode of at least one frame image is a second scanning mode Q2, m is more than or equal to 2, and m is a positive integer, wherein each frame image is scanned in the first scanning mode Q1 and comprises N grid line scanning stages and N touch scanning stages, each touch scanning stage is adjacent to each grid line scanning stage, N is more than or equal to 2, and N is a positive integer; in the second scanning mode Q2, each frame of image includes only 1 gate line scanning stage and 1 touch scanning stage.
It can be understood that in the first scanning mode Q1 of the display panel of this embodiment, there are 4 gate line scanning stages and 4 touch scanning stages, where the gate lines may be divided into multiple groups, for example, G1 and G2 are grouped into one group, G3 and G4 are grouped into one group, G5 and G6 are grouped into one group, G7 and G8 are grouped into one group, after the display scanning is performed on the G1 and G2, the touch scanning is performed on the touch line TX1, then the display scanning is performed on the G3 and G4, then the touch scanning is performed on the touch line TX2, then the display scanning is performed on the G5 and G6, the touch scanning is performed on the touch line TX4, and finally the display scanning is performed on the touch line TX5, so that the gate line scanning and the touch scanning of a frame of picture are completed; in the second scanning mode Q2 of the display panel of this embodiment, there are 1 gate line scanning stage and 1 touch scanning stage, and after all the gate lines G1 to G8 complete the display scanning, the touch scanning is performed on TX1 to TX 4.
With reference to the above description, in the present invention, the scanning mode of at least one frame of images is the second scanning mode Q2, so that not only the pixel charging time can be increased and the display time can be increased, but also the number of frames scanned by the first scanning mode Q1 and the number of frames scanned by the second scanning mode Q2 can be matched by calculation, so that the touch scanning frequency of different requirements can be adapted, and the application range is wider.
In some alternative embodiments, with continued reference to fig. 3, 4 and 5, fig. 5 is a driving timing diagram of another display panel provided in the present invention, and fig. 5 illustrates a second scan pattern Q2.
The display panel in fig. 4 includes a plurality of gate lines G extending in a row direction X, a plurality of data lines S extending in a column direction Y, the gate lines G and the data lines S cross to define a pixel region, the pixel region includes pixels P, the plurality of pixels form a pixel row along the row direction X, the display panel 100 further includes a plurality of common electrode lines 4, and the common electrode lines 4 are multiplexed into a touch line TX.
Referring to fig. 4 and 5, in the gate line scanning stage, a gate line scanning pulse signal is transmitted to the gate line G, a fixed common potential is transmitted to the common electrode line 4, and a data voltage is transmitted to the data line S;
the touch scanning stage comprises a first stage J1, a second stage J2 and a third stage J3, wherein,
a first stage J1 of transmitting a gate line scanning pulse signal to the gate line G, transmitting a fixed common potential to the common electrode line 4, and transmitting a fixed potential to the data line S;
a second stage J2 of transmitting a touch scanning pulse signal to the common electrode line 4;
in the third stage J3, a gate line scanning pulse signal is transmitted to the gate line G, a fixed common potential is transmitted to the common electrode line 4, and a ground potential is transmitted to the data line S.
As described above, the gate lines G (G1 to G8) and the data lines S are schematically shown in fig. 4, and of course, the number of the gate lines G and the data lines S is merely illustrative, the gate lines G and the data lines S intersect to define a pixel region, the pixel region has pixels P, and a plurality of pixels P along the row direction X form a pixel row, and of course, the pixel region also has a driving transistor TFT, the gate of which is electrically connected to the gate line G, the source of which is electrically connected to the data line S, and the drain of which is electrically connected to the pixel electrode of the pixel P.
It can be seen from fig. 5 that, in the second phase J2, in addition to the touch scan pulse signal transmitted to the common electrode line (VCOM), the touch scan pulse signal is also transmitted to the clock signal line (CKV 1-L/R, CKVN-L/R), the gate turn-on signal line (CKH 1, CKHN, XCKH1, XCKHN), and the data line (Source).
In the gate line scanning stage, a display scanning signal is provided for the gate lines, namely, a gate driving circuit with a shift register provides an opening signal for the gate lines of corresponding rows and simultaneously provides a common voltage signal for the corresponding common electrodes. The gate-on signal is used to turn on the switching element of the corresponding pixel row, for example, in fig. 4, the switching element is usually a driving transistor TFT, the gate line G inputs the on signal, so that the gate of the TFT is turned on, the drain of the TFT is connected to the data line S, the display data signal is input to the corresponding pixel row through the data line S and stored in the pixel electrode, after the data signal is input, the gate driving unit stops outputting the on signal, and turns off the driving transistor TFT, that is, the display scan includes the turn-on to turn-off of the gate line G, and the input of the data signal is completed. It will be appreciated that, if the polarities of the adjacent two data lines S are opposite, in a frame, the polarity relationship between the plurality of data lines S is positive and negative …, the polarity of the 1 st column of pixels P is positive, the polarity of the 2 nd column of pixels P is negative, the polarity of the 3 rd column of pixels P is positive, the polarity of the 4 th column of pixels P is negative …, the polarities of the data voltages transmitted to the same data line S are inverted in a next frame, the polarity relationship between the plurality of data lines S is positive …, the polarity of the 1 st column of pixels P is negative, the polarity of the 2 nd column of pixels P is positive, the polarity of the 3 rd column of pixels P is negative, the polarity of the 4 th column of pixels P is positive …, and so on, so that each pixel P can be driven in an inverted manner, thereby preventing the polarization phenomenon of the liquid crystal in the display panel 100 and improving the display efficiency of the display device.
It should be noted that, in the second scan mode Q2, the touch scan stage may be located before or after the frame, where the before frame refers to that the touch scan stage is located before the gate line scan stage, and the after frame refers to that the touch scan stage is located after the gate line scan stage. It should be noted that, before executing touch scanning or after completing touch scanning, the driving chip IC needs to execute noise scanning, that is, when no touch scanning signal is input, the signal of the common electrode multiplexed as the touch electrode is detected, and under the condition of normal touch function, the detection signal is not changed, otherwise, the touch signal threshold needs to be adjusted, the touch system is initialized, the time of one noise scanning is longer than the time of scanning one touch electrode, and in the invention, when the touch scanning stage is located before or after a frame, the longer noise scanning time needs to be matched.
Referring to fig. 5, in the first stage J1 of the touch scanning stage, the gate line scanning pulse signal is continuously transmitted to the gate line, the fixed common potential is transmitted to the common electrode line, and the fixed potential is transmitted to the data line, it can be understood that in the first stage J1, the display content of the display screen in the display panel needs to be maintained, and the voltage stored in the pixel electrode is used for maintaining the screen display, in this stage, if the voltage on the pixel electrode cannot be effectively maintained, uneven screen display is caused, that is, the voltage difference exists between the source electrode and the drain electrode of the driving transistor, the leakage current occurs, the corresponding pixel is darkened, and uneven screen display is caused. In the embodiment, a fixed potential is transmitted to the data line in the first stage J1, so that a voltage difference between the source and the drain of the driving transistor can be reduced, leakage current is prevented, and the problem of uneven display of a picture is improved.
It will be appreciated that the data voltages transmitted to the same data line S are polarity-inverted, so that each pixel P can be driven in an inversion manner, and the voltage required to reach the display screen during the polarity inversion needs to have a certain ramp time, the gate line scanning pulse signal is transmitted to the gate line in the third stage J3, the fixed common potential is transmitted to the common electrode line, and the ground potential is transmitted to the data line, that is, the third stage J3 precharges the pixel electrode to the ground potential, so that the ramp time required to reach the display screen voltage can be reduced during the positive and negative frame switching, thereby correspondingly prolonging the charging time and improving the display performance.
In some alternative embodiments, with continued reference to fig. 5, the fixed potential includes: the data voltage in the previous frame, or any one of gray scale voltages 0-255, or the ground potential.
In the first stage J1, a fixed potential is transmitted to the data line to prevent the leakage current of the driving transistor from occurring, which results in uneven display of the display screen.
Of course, the preferred embodiment is to transmit the data voltages in the previous frame of picture to the data lines, where different data voltages can be transmitted to different data lines, and of course, if the previous frame of picture is a pure picture, the same data voltages can be transmitted to different data lines. It is understood that the data voltage in the previous frame of picture transmitted to the data line in the first phase J1 may not need to be switched to other potential.
In some alternative embodiments, referring to fig. 6, fig. 6 is a screen display period provided by the present invention. Fig. 6 shows that the display panel displays a frame picture with m as a period.
In fig. 6, Q1 is a first scanning mode, Q2 is a second scanning mode, and in the first scanning mode, each frame of image includes N gate line scanning stages and N touch scanning stages, and each touch scanning stage is adjacent to each gate line scanning stage; in the second scanning mode, each frame of picture is scanned only including 1 grid line scanning stage and 1 touch scanning stage. In fig. 6, only m=3 is taken as an example, and the value of m is not particularly limited. Only 3 cycles are shown in fig. 6 as an exemplary illustration.
The m is taken as the period to display the picture, so that the charging time of the pixels can be prolonged more stably, the charging capability of the pixels in the display panel is improved, the picture is displayed periodically, and the signals transmitted by the driving chip are periodic, thereby being more beneficial to the time sequence setting of the driving chip.
In some alternative embodiments, referring to fig. 7, fig. 7 is a further screen display cycle provided by the present invention. And the scanning mode of the 1 st to m-1 st frames is a second scanning mode, and the scanning mode of the m-th frames is a first scanning mode.
In fig. 7, Q1 is a first scanning mode, Q2 is a second scanning mode, and in the first scanning mode, each frame of image includes N gate line scanning stages and N touch scanning stages, and each touch scanning stage is adjacent to each gate line scanning stage; in the second scanning mode, each frame of picture is scanned only including 1 grid line scanning stage and 1 touch scanning stage. Fig. 7 only schematically illustrates that m=4, the scanning mode of the 1 st to 3 rd frames is the second scanning mode, the scanning mode of the 4 th frame is the first scanning mode, and of course, m may be greater than 4, which is not particularly limited herein.
It can be understood that in this embodiment, the number of frames scanned in the second scanning mode is the largest in the m frames, and it can be understood that the larger the number of frames scanned in the second scanning mode is, the longer the pixel charging time is, in this embodiment, the longest pixel charging time can be ensured, and meanwhile, the touch scanning frequency of different requirements can be adapted, and the application range is wider.
In some alternative embodiments, referring to fig. 8 and 9, fig. 8 is a further screen display period provided by the present invention, and fig. 9 is a further screen display period provided by the present invention. When m is an even number, the scanning mode of the 1 st to m/2 th frames is a second scanning mode, and the scanning mode of the m/2+1 st to m frames is a first scanning mode;
when m is an odd number, the scanning mode of the 1 st to (m-1)/2 nd frames is the second scanning mode, and the scanning mode of the (m-1)/2+1 st to m th frames is the first scanning mode.
In fig. 8 and 9, Q1 is a first scanning mode, Q2 is a second scanning mode, and in the first scanning mode, each frame of image includes N gate line scanning stages and N touch scanning stages, and each touch scanning stage is adjacent to each gate line scanning stage; in the second scanning mode, each frame of picture is scanned only including 1 grid line scanning stage and 1 touch scanning stage. In fig. 8, only m=5 is illustrated as an example, and of course, the value of m is not particularly limited, and only 2 periods are illustrated in fig. 8 as an exemplary illustration. In fig. 9, only m=4 is illustrated as an example, and of course, the value of m is not particularly limited, and only 2 periods are illustrated in fig. 9 as an exemplary illustration.
It can be understood that when the frequency of the grid line scanning is not equal to the frequency of the touch scanning, especially when the frequency of the touch scanning is greater than the frequency of the grid line scanning, the number of the second scanning mode and the number of the first scanning modes need to be matched in the displaying process of m frames of pictures, in this embodiment, when m is an even number, the scanning mode of the 1 st to m/2 th frames of pictures is the second scanning mode, and the scanning mode of the m/2+1 to m th frames of pictures is the first scanning mode; when m is an odd number, the scanning mode of the 1 st to (m-1)/2 th frames is the second scanning mode, and the scanning mode of the (m-1)/2+1 st to m-th frames is the first scanning mode, so that the touch scanning frequency can be adapted to the situation that the grid line scanning frequency is larger than the touch scanning frequency. Of course, the present embodiment can also be applied to a touch scanning frequency equal to the gate line scanning frequency.
In the present embodiment, when m is an even number, the scanning mode of the 1 st to m/2 th frames is the second scanning mode, and the scanning mode of the m/2+1 st to m frames is the first scanning mode; when m is an odd number, the scanning mode of the 1 st to (m-1)/2 th frames is the second scanning mode, and the scanning mode of the (m-1)/2+1 st to m-th frames is the first scanning mode, so that the driving time sequence is more beneficial to setting.
In some alternative embodiments, referring to fig. 10 and 11, fig. 10 is yet another screen display period provided by the present invention, and fig. 11 is yet another screen display period provided by the present invention. m is greater than or equal to 4, a second scanning mode and a first scanning mode are sequentially scanned alternately, wherein the first scanning mode is positioned before the second scanning mode or the first scanning mode is positioned after the second scanning mode.
In fig. 10 and 11, Q1 is a first scanning mode, Q2 is a second scanning mode, and in the first scanning mode, each frame of image includes N gate line scanning stages and N touch scanning stages, and each touch scanning stage is adjacent to each gate line scanning stage; in the second scanning mode, each frame of picture is scanned only including 1 grid line scanning stage and 1 touch scanning stage. Fig. 10 and 11 illustrate only m=4 as an example, and of course, the value of m is not particularly limited, and only 2 periods are illustrated in fig. 10 as an exemplary illustration.
In this embodiment, when the scanning mode arrangement manner in the m frame picture is Q2Q1 or Q1Q2, it can be understood that when the frequency of the raster line scanning is unequal to the frequency of the touch scanning, especially when the frequency of the touch scanning is greater than the frequency of the raster line scanning, the number of the second scanning modes and the number of the first scanning modes need to be matched for use in the display process of the m frame picture, in this embodiment, one second scanning mode and one first scanning mode are alternately scanned in turn, and the first scanning mode is located before the second scanning mode or after the second scanning mode, so that the situation that the touch scanning frequency is greater than the raster line scanning frequency can be adapted. Of course, the present embodiment can also be applied to a touch scanning frequency equal to the gate line scanning frequency.
In this embodiment, in the frame image with the period of m, a second scanning mode and a first scanning mode are alternately scanned in turn, so that two frame images and two frame images can show periodic variation when the image is displayed, and the charging time of pixels is more uniform, which is beneficial to improving the display uniformity.
In some alternative embodiments, with continued reference to fig. 7-10, the raster scan frequency in the raster scan phase is equal to the touch scan frequency in the touch scan phase.
It can be understood that in the embodiments of fig. 7 to 10, since the number of the gate line scanning stages and the number of the touch scanning stages in each frame of the screen are equal, the embodiments are applicable to the case where the gate line scanning frequency in the gate line scanning stage is equal to the touch scanning frequency in the touch scanning stage, in which case the charging time of the pixels can be prolonged, the charging capability of the pixels in the display panel can be improved, and the display non-uniformity problem of the display panel can be improved.
In some alternative embodiments, with continued reference to fig. 8-11, the raster scan frequency in the raster scan phase is less than the touch scan frequency in the touch scan phase.
If the scanning frequency of the grid line is 90HZ and the frequency of the touch scanning is 135HZ, the number of the grid line scanning stages and the number of the touch scanning stages in the first scanning mode and the second scanning mode are different, so that the number of the first scanning mode and the number of the second scanning mode in the adjacent m frames of pictures can be reasonably matched, different touch scanning frequencies can be adapted, and the application range is wider.
The touch scanning frequencies of the first scanning mode and the second scanning mode can be the same or different, so that the touch scanning device can adapt to different touch scanning frequencies through matching of the first scanning mode and the second scanning mode, and the application range is wider.
Referring to the following table 1, when table 1 is m=4, the first scan mode and the second scan mode are matched under different scan frequencies of the gate line and the touch scan frequency.
TABLE 1 collocation of corresponding first and second scan modes at different grid line and touch scan frequencies
In table 1, DP is the gate line scanning frequency, TP is the touch scanning frequency, the units are HZ, mode1 corresponds to the display screen case in fig. 7, mode2 corresponds to the display screen case in fig. 9, mode3 corresponds to the display screen case in fig. 10, and Mode4 corresponds to the display screen case in fig. 11, so that when the required gate line scanning frequency is equal to the touch scanning frequency, modes 1, 2, 3 and 4 can all reach the touch scanning frequency requirement; however, when the touch scanning frequency is required to be greater than the gate line scanning frequency, mode2, mode3 and Mode4 are required to be matched to achieve the touch scanning frequency requirement.
In some alternative embodiments, the raster scan frequency is greater than or equal to 90Hz during the raster scan phase, and the touch scan frequency is greater than or equal to 90Hz during the touch scan phase.
It can be understood that the higher the scanning frequency of the grid line and the touch scanning frequency, the shorter the time for scanning each row of the grid line, and the condition of insufficient pixel charging exists.
As can be seen from the above embodiments, the driving method of a display panel and the display panel provided by the present invention at least achieve the following beneficial effects:
in the invention, m adjacent frame pictures comprise a first scanning mode and a second scanning mode, wherein each frame picture comprises N grid line scanning stages and N touch scanning stages in the first scanning mode, and each frame picture comprises only 1 grid line scanning stage and 1 touch scanning stage in the second scanning mode, on one hand, the number of the touch scanning stages in each frame picture is reduced, so that the time for scanning each row of grid lines in the grid line scanning stages is increased, the charging time of corresponding pixels is prolonged, the charging capability of pixels in a display panel is improved, and the uneven display problem of the display panel is improved; meanwhile, the number of the frame pictures scanned by the scanning in the first scanning mode and the number of the frame pictures scanned by the scanning in the second scanning mode are calculated and matched, so that the touch scanning frequency can be adapted to different requirements, and the application range is wider.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A driving method of display panel is characterized in that, in m adjacent frame pictures, at least one frame picture is scanned in a first scanning mode, at least one frame picture is scanned in a second scanning mode, m is more than or equal to 2, and m is a positive integer,
in the first scanning mode, each frame of picture is scanned and comprises N grid line scanning stages and N touch scanning stages, wherein each touch scanning stage is adjacent to each grid line scanning stage, N is more than or equal to 2, and N is a positive integer;
in the second scanning mode, each frame of picture is scanned only to comprise 1 grid line scanning stage and 1 touch scanning stage;
the display panel comprises a plurality of grid lines extending along the row direction and a plurality of data lines extending along the column direction, wherein the grid lines and the data lines are crossed to define a pixel area, the pixel area comprises pixels, the pixels form a pixel row along the row direction, the display panel further comprises a plurality of common electrode lines which are multiplexed into a touch control line,
the grid line scanning stage is used for transmitting a grid line scanning pulse signal to the grid line, transmitting a fixed common potential to the common electrode line and transmitting a data voltage to the data line;
the touch scanning stage comprises a first stage, a second stage and a third stage, wherein,
the first stage is to transmit a gate line scanning pulse signal to the gate line, transmit a fixed common potential to the common electrode line, and transmit a fixed potential to the data line;
the second stage is used for transmitting a touch scanning pulse signal to the common electrode line;
and the third stage is to transmit a gate line scanning pulse signal to the gate line, transmit a fixed common potential to the common electrode line and transmit a ground potential to the data line.
2. The driving method of a display panel according to claim 1, wherein the fixed potential comprises: the data voltage in the previous frame, or any one of gray scale voltages 0-255, or the ground potential.
3. The method according to claim 1, wherein the display panel displays a frame picture with m as a period.
4. The method of driving a display panel according to claim 3, wherein m is equal to or greater than 4, the scanning mode of the 1 st to m-1 st frames is the second scanning mode, and the scanning mode of the m-th frames is the first scanning mode.
5. The method according to claim 3, wherein m is equal to or greater than 4, and when m is an even number, the scanning mode of the 1 st to m/2 th frames is the second scanning mode, and the scanning mode of the m/2+1 th to m-th frames is the first scanning mode;
when m is an odd number, the scanning mode of the 1 st to (m-1)/2 th frames is the second scanning mode, and the scanning mode of the (m-1)/2+1 st to m-th frames is the first scanning mode.
6. A driving method of a display panel according to claim 3, wherein m is equal to or greater than 4, one of the second scan patterns and one of the first scan patterns are alternately scanned in sequence, the first scan pattern being located before the second scan pattern or the first scan pattern being located after the second scan pattern.
7. The method of claim 4, 5 or 6, wherein the raster scan frequency in the raster scan stage is equal to the touch scan frequency in the touch scan stage.
8. The method according to claim 5 or 6, wherein a gate line scanning frequency in the gate line scanning stage is smaller than a touch scanning frequency in the touch scanning stage.
9. The method according to claim 1, wherein a gate line scanning frequency in the gate line scanning stage is 90Hz or more, and a touch scanning frequency in the touch scanning stage is 90Hz or more.
10. The method according to claim 1, wherein the number of frames scanned in the second scanning mode is equal to or greater than the number of frames scanned in the first scanning mode.
11. The display panel is characterized by comprising a plurality of grid lines extending along a row direction and a plurality of data lines extending along a column direction, wherein pixel areas are defined by the crossing of the grid lines and the data lines, each pixel area comprises pixels, the pixels form a pixel row along the row direction, and the display panel further comprises a plurality of common electrode lines which are multiplexed into a touch control line;
at least one frame of m adjacent frames is scanned in a first scanning mode, at least one frame of frames is scanned in a second scanning mode, m is more than or equal to 2, and m is a positive integer,
in the first scanning mode, each frame of picture is scanned and comprises N grid line scanning stages and N touch scanning stages, wherein each touch scanning stage is adjacent to each grid line scanning stage, N is more than or equal to 2, and N is a positive integer;
in the second scanning mode, each frame of picture is scanned only to comprise 1 grid line scanning stage and 1 touch scanning stage;
the grid line scanning stage is used for transmitting a grid line scanning pulse signal to the grid line, transmitting a fixed common potential to the common electrode line and transmitting a data voltage to the data line;
the touch scanning stage comprises a first stage, a second stage and a third stage, wherein,
the first stage is to transmit a gate line scanning pulse signal to the gate line, transmit a fixed common potential to the common electrode line, and transmit a fixed potential to the data line;
the second stage is used for transmitting a touch scanning pulse signal to the common electrode line;
and the third stage is to transmit a gate line scanning pulse signal to the gate line, transmit a fixed common potential to the common electrode line and transmit a ground potential to the data line.
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