CN111009224A - Display panel driving method and display device - Google Patents
Display panel driving method and display device Download PDFInfo
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- CN111009224A CN111009224A CN201911362228.4A CN201911362228A CN111009224A CN 111009224 A CN111009224 A CN 111009224A CN 201911362228 A CN201911362228 A CN 201911362228A CN 111009224 A CN111009224 A CN 111009224A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
- G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
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Abstract
The invention discloses a driving method and a display device of a display panel, belonging to the technical field of display, wherein the display panel comprises a plurality of scanning lines, a plurality of data lines and a plurality of pixel units arranged in an array, and the driving method comprises the following steps: in a first driving mode, two frames are taken as a polarity inversion driving period, and in the polarity inversion driving period, the polarity arrangement modes of two adjacent frames are the same, and the polarities are opposite; in a second driving mode, at least 2n frames are used as a polarity inversion driving period, and in the polarity inversion driving period, the 1 st frame to the nth frame have the same polarity arrangement mode and the same polarity; the polarity arrangement modes of the (n + 1) th frame to the 2n th frame are the same, and the polarities are also the same; the 1 st frame and the n +1 th frame have the same polarity arrangement mode and opposite polarities. The invention can be compatible with high-frequency driving and low-frequency driving modes, is suitable for switching operation of various different driving frequencies, is favorable for saving power consumption, meets the charging time and improves the charging efficiency.
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 device.
Background
Liquid Crystal Displays (LCDs) have many advantages such as thin body, power saving, and no radiation, and are widely used, such as Liquid Crystal televisions, mobile phones, Personal Digital Assistants (PDAs), digital cameras, computer screens, or notebook computer screens, which are dominant in the field of flat panel displays.
The liquid crystal display panel comprises a plurality of sub-pixels arranged in an array manner, each sub-pixel is electrically connected with a Thin Film Transistor (TFT), a grid electrode (Gate) of the TFT is connected with a grid electrode scanning line in the horizontal direction, a Source electrode (Source) is connected with a data line in the vertical direction, and a Drain electrode (Drain) is connected with a pixel electrode. Sufficient voltage is applied to the Gate scanning lines through a Gate Driver (Gate Driver) IC, so that all TFTs electrically connected to the Gate scanning lines are turned on, and thus signal voltages on the data lines can be written into the pixels, thereby controlling the transmittance of the liquid crystal and achieving the display effect. With the development of display technology, the size of the lcd panel is larger and higher, but the lcd panel usually uses a Pulse-Width Modulation (PWM) IC to generate a constant TFT on Voltage (VGH) to be provided to the gate driver IC to drive the TFTs in each row of the sub-pixels, and then the sub-pixels can be charged, and the abnormal picture is caused by insufficient charging time. Moreover, a display panel usually has only one fixed scanning refresh frequency and a single driving mode.
Therefore, it is an urgent need to solve the technical problem of the present invention to provide a driving method of a display panel and a display device, which are compatible with various driving frequencies, can improve charging efficiency, and are beneficial to reducing power consumption.
Disclosure of Invention
In view of this, the present invention provides a driving method of a display panel and a display device, so as to solve the problems in the prior art that a driving method is single, multiple driving frequencies cannot be compatible, charging efficiency is low, and power consumption is wasted.
The invention provides a driving method of a display panel, the display panel comprises: the pixel array comprises a plurality of scanning lines arranged along a second direction and extending along the first direction, a plurality of data lines arranged along the first direction and extending along the second direction, and a plurality of pixel units arranged in an array, wherein each pixel unit comprises a plurality of sub-pixels, the scanning lines and the data lines are crossed to define an area where the sub-pixels are located, and each sub-pixel is correspondingly connected with the scanning lines and the data lines respectively; along the second direction, the plurality of sub-pixels form a plurality of sub-pixel rows, and along the first direction, the plurality of sub-pixels form a plurality of sub-pixel columns; the driving method comprises the following steps: providing a first drive mode and a second drive mode; in a first driving mode, two frames are taken as a polarity inversion driving period, and in the polarity inversion driving period, the polarity arrangement modes of two adjacent frames are the same, and the polarities are opposite; in a second driving mode, at least 2n frames are used as a polarity inversion driving period, and in the polarity inversion driving period, the 1 st frame to the nth frame have the same polarity arrangement mode and the same polarity; the polarity arrangement modes of the (n + 1) th frame to the 2n th frame are the same, and the polarities are also the same; the 1 st frame and the (n + 1) th frame have the same polarity arrangement mode and opposite polarities; wherein n is not less than 2 and n is an integer.
Based on the same inventive concept, the invention also provides a display device which adopts the driving method of the display panel to drive and display.
Compared with the prior art, the driving method of the display panel and the display device provided by the invention at least realize the following beneficial effects:
in the driving modes provided by the driving method of the display panel, the first driving mode is suitable for a low-frequency driving mode without high performance, such as a common operation mode of short messages, chatting and the like, under the first driving mode, two frames are taken as a polarity inversion driving period, and in one polarity inversion driving period, the polarity arrangement modes of two adjacent frames are the same, and the polarities are opposite; the second driving mode is suitable for a high-frequency driving mode which needs high performance and saves power consumption, such as a movie and game interface operation mode, under the second driving mode, the polarity of all sub-pixels is inverted once after scanning at least 2 frames, and the power consumption of positive and negative switching all the time during high-frequency driving can be avoided.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, 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 schematic plan view of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a polarity inversion driving period and a polarity arrangement manner of sub-pixels corresponding to each frame in the first driving mode in the driving method according to the embodiment of the present invention;
fig. 3 is a schematic diagram of two polarity inversion driving periods and a polarity arrangement manner of sub-pixels corresponding to each frame in the first driving mode in the driving method according to the embodiment of the present invention;
fig. 4 is a schematic diagram of a polarity inversion driving period and a polarity arrangement manner of sub-pixels corresponding to each frame in a second driving mode in the driving method according to the embodiment of the invention;
fig. 5 is a schematic diagram of a polarity inversion driving period and a polarity arrangement manner of sub-pixels corresponding to each frame in another driving method according to an embodiment of the present invention in the second driving mode;
fig. 6 is a schematic diagram of a polarity inversion driving period and a polarity arrangement manner of sub-pixels corresponding to each frame in another driving method according to an embodiment of the present invention in the second driving mode;
FIG. 7 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a connection structure of two adjacent multiplexing units in FIG. 7;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of 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, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those 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 particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the related art, after a subpixel is charged, the subpixel can be charged again after the next refresh, and in the process, the subpixel voltage may leak electricity, so that under a lower scanning driving frequency (refresh frequency) (such as 30Hz or 15Hz), the subpixel needs 32ms (1/30Hz) or even longer time (67 ms at 15Hz) to be refreshed again, and the potential holding capability of the subpixel voltage in the period mainly depends on manufacturing a large storage capacitor, which is better than a large barrel and is filled with much water, and even if a crack (leakage current) exists, the water level (voltage) cannot drop too much within a certain time, so that the method is suitable for a low-frequency driving display panel. However, if the refresh rate is high, the charging time is short, for example, the driving frequency of 60Hz represents 60 screen refreshes per second, 120 screen refreshes per frame (1 frame time is 1/120Hz) is 8.33ms, and if one frame is to scan and drive the 2520 rows of sub-pixels, the scanning time of each row of sub-pixels is only 3.3 μ S (8.33ms/2520 rows), which is much longer than the bucket, and the water level (voltage) cannot be filled in a short time. Therefore, for a display panel driven at a low frequency, it is desirable to make the storage capacitor large to enhance the potential holding capability, and for a display panel driven at a high frequency, it is desirable to make the storage capacitor small to further satisfy the charging time, so that if two driving modes with different frequencies are matched in the same panel, the manufacturing requirements for the storage capacitor will conflict with each other.
In view of this, the present invention provides a driving method of a display panel and a display device, so as to solve the problems in the prior art that a driving method is single, multiple driving frequencies cannot be compatible, charging efficiency is low, and power consumption is wasted.
Referring to fig. 1 to 6, fig. 1 is a schematic plane structure diagram of a display panel according to an embodiment of the present invention, fig. 2 is a schematic plane structure diagram of a polarity inversion driving period and a polarity arrangement manner of sub-pixels corresponding to each frame in a first driving mode in a driving method according to an embodiment of the present invention, fig. 3 is a schematic plane structure diagram of two polarity inversion driving periods and a polarity arrangement manner of sub-pixels corresponding to each frame in a first driving mode in a driving method according to an embodiment of the present invention, fig. 4 is a schematic plane structure diagram of a polarity inversion driving period and a polarity arrangement manner of sub-pixels corresponding to each frame in a second driving mode in a driving method according to an embodiment of the present invention, fig. 5 is a schematic plane structure diagram of a polarity inversion driving period and a polarity arrangement manner of sub-pixels corresponding to each frame in another driving method according to an embodiment of the present invention, fig. 6 is a schematic diagram of a polarity inversion driving period and a polarity arrangement manner of sub-pixels corresponding to each frame in another driving method according to an embodiment of the present invention in the second driving mode;
an embodiment of the present invention provides a driving method of a display panel, where the display panel 000 includes:
the display device comprises a plurality of scanning lines G arranged along a second direction Y and extending along a first direction X, a plurality of data lines S arranged along the first direction X and extending along the second direction Y, and a plurality of pixel units 10 arranged in an array, wherein each pixel unit 10 comprises a plurality of sub-pixels 100, optionally, the pixel unit 10 comprises sub-pixels 100 with at least three different colors, the scanning lines G and the data lines S are crossed to define a region where the sub-pixels 100 are located, and each sub-pixel 100 is correspondingly connected with the scanning lines G and the data lines S respectively; the plurality of sub-pixels 100 arranged along the first direction X form a sub-pixel row 100H, the plurality of sub-pixel rows 100H are arranged along the second direction Y, the plurality of sub-pixels 100 arranged along the second direction Y form a sub-pixel column 100L, and the plurality of sub-pixel columns 100L are arranged along the first direction X; each subpixel row 100H includes a plurality of red subpixels R, a plurality of green subpixels G, and a plurality of blue subpixels B; in each sub-pixel row 100H, the red sub-pixels R, the green sub-pixels G, and the blue sub-pixels B are alternately arranged, and the pixel unit 100 at least includes one red sub-pixel R, one green sub-pixel G, and one blue sub-pixel B (indicated by different filling patterns in fig. 1).
The driving method comprises the following steps:
providing a first drive mode and a second drive mode;
in a first driving mode, two frames are taken as a polarity inversion driving period, and in the polarity inversion driving period, the polarity arrangement modes of two adjacent frames are the same, and the polarities are opposite;
in a second driving mode, at least 2n frames are used as a polarity inversion driving period, and in the polarity inversion driving period, the 1 st frame to the nth frame have the same polarity arrangement mode and the same polarity; the polarity arrangement modes of the (n + 1) th frame to the 2n th frame are the same, and the polarities are also the same; the 1 st frame and the (n + 1) th frame have the same polarity arrangement mode and opposite polarities; wherein n is not less than 2 and n is an integer.
Specifically, in the driving method of the display panel of the embodiment, the display panel 000 includes a plurality of scan lines G arranged along the second direction Y and extending along the first direction X, a plurality of data lines S arranged along the first direction X and extending along the second direction Y, and a plurality of pixel units 10 arranged in an array, each pixel unit 10 includes a plurality of sub-pixels 100, and optionally, each sub-pixel 100 is electrically connected to a thin film transistor TFT and a pixel electrode 1001, a Gate (Gate) of the TFT is connected to the scan line G extending along the first direction X, a Source (Source) is connected to the data line S extending along the second direction Y, and a Drain (Drain) is connected to the pixel electrode 1001. A Gate Driver (Gate Driver) IC (not shown) applies a sufficient voltage to the scan lines G to turn on all the TFTs electrically connected to the scan lines G, so that the signal voltage on the data lines S can be written into each sub-pixel 100 to control the transmittance of the liquid crystal, thereby achieving the display effect. Alternatively, the thin film transistor TFT may be any one of an N-type thin film transistor or a P-type thin film transistor. For clearly illustrating the technical solution of the present embodiment, in fig. 1, along the second direction Y, the scan lines G are respectively labeled as G1, G2, G3, and G4 … … G (k), and along the first direction X, the data lines S are respectively labeled as S1, S2, S3, S4, S5, and S6 … … S (m), where k and m are positive integers.
The driving method provided by the embodiment comprises a first driving mode and a second driving mode;
as shown in fig. 2 and fig. 3, the first driving mode is suitable for a low frequency driving mode without high performance, such as a normal operation mode of short message, chat, etc., in which two frames are used as a polarity inversion driving period, and in the polarity inversion driving period, the polarity arrangement of two adjacent frames is the same, and the polarities are opposite, and in the first driving mode, the polarity arrangement of each sub-pixel when displaying is as shown in fig. 2 and fig. 3, and in this driving mode, when displaying a heavy load, the polarity of all sub-pixels is inverted once every time a picture scans a frame, specifically, as shown in fig. 1-fig. 2, for 6 sub-pixel columns 100L connected by 6 data lines S (S1, S2, S3, S4, S5, S6) circled within a dotted line frame, the polarity arrangement of the 1 st frame is R + G-B + R-G + B-, wherein, r, G, B, which respectively represents a red sub-pixel, a green sub-pixel and a blue sub-pixel, "+" represents that the polarity of the sub-pixel is positive, and "-" represents that the polarity of the sub-pixel is positive, so that in the first driving mode, in the 2 nd frame, the polarity arrangement of the six sub-pixels 100 connected to the six data lines S will become R-G + B-R + G-B +; as shown in fig. 1 and 3, for 6 sub-pixel columns 100L connected by 6 data lines S (S1, S2, S3, S4, S5, S6) circled in a dotted line frame, in the first polarity inversion driving period T1, the polarity of the 1 st frame is arranged as R + G-B + R-G + B-, in the 2 nd frame, the polarity arrangement of the six sub-pixels 100 connected by the six data lines S becomes R-G + B-R + G-B +, and the polarity arrangement of the six sub-pixels 100 connected to the six data lines S of the 1 st frame by the second polarity inversion driving period T2 becomes again R + G-B + R-G + B-, and the polarity arrangement of the six sub-pixels 100 connected to the six data lines S of the 2 nd frame becomes again R-G + B-R + G-B +, which are sequentially inverted. The driving method adopted by the first driving mode can prevent the problems of residual images and the like caused by impurity ions in the adsorbed liquid crystal due to fixed electric potential by reversing the polarity of all the sub-pixels once every scanning frame.
As shown in fig. 4-6, the second driving mode is suitable for a high-frequency driving mode requiring high performance and saving power consumption, such as a movie, a game interface operation mode, in the second driving mode, at least 2n frames are used as a polarity inversion driving period as shown in fig. 4, and in a polarity inversion driving period T, the 1 st frame to the nth frame have the same polarity arrangement and the same polarity; the polarity arrangement modes of the (n + 1) th frame to the 2n th frame are the same, and the polarities are also the same; the 1 st frame and the (n + 1) th frame have the same polarity arrangement mode and opposite polarities; wherein n is not less than 2 and n is an integer.
As shown in fig. 5, if n is 2, 4 frames are used as one polarity inversion driving period T, and in one polarity inversion driving period T, the polarity arrangement of the 1 st frame to the 2 nd frame is the same, and the polarity is also the same; the polarity arrangement modes of the 3 rd frame to the 4 th frame are the same, and the polarities are also the same; the polarity arrangement of the frame 1 and the frame 3 is the same, and the polarities are opposite, as for the 6 sub-pixel columns 100L connected by the 6 data lines S circled in the dashed line boxes in fig. 1 and 5, the polarity arrangement of the 1 st frame is R + G-B + R-G + B-, then in the second driving mode, the polarity arrangement of the six sub-pixels 100 connected to the six data lines S is R + G-B + R-G + B-at the 2 nd frame, however, in order to solve the image sticking problem, the polarity inversion is still needed, so that the polarity arrangement of the six sub-pixels 100 connected to the six data lines S is changed to R-G + B-R + G-B + until the 3 rd frame, and the polarity arrangement of the six sub-pixels 100 connected by the six data lines S at the 4 th frame is again R-G + B-R + G-B +. The polarity arrangement of the six sub-pixels 100 connected to the six data lines S of the 1 st frame and the 2 nd frame in the next polarity inversion driving period T is changed to R + G-B + R-G + B-, and the polarity arrangement of the six sub-pixels 100 connected to the six data lines S of the 3 rd frame and the 4 th frame is changed to R-G + B-R + G-B +, which are sequentially inverted.
Optionally, as shown in fig. 6, if n is 4, 8 frames are used as one polarity inversion driving period T, and in the one polarity inversion driving period T, the polarity arrangement manner of the 1 st frame to the 4 th frame is the same, and the polarities are also the same; the polarity arrangement modes of the 5 th frame to the 8 th frame are the same, and the polarities are also the same; the polarity arrangement of the frame 1 and the frame 5 is the same, and the polarities are opposite, as for the 6 sub-pixel columns 100L connected by the 6 data lines S circled in the dashed line boxes in fig. 1 and 6, the polarity arrangement of the 1 st frame is R + G-B + R-G + B-, then in the second driving mode, the polarity arrangement of the six sub-pixels 100 connected to the six data lines S of the 2 nd frame to the 4 th frame is R + G-B + R-G + B-, however, in order to solve the image sticking problem, the polarity inversion is still needed, so that the polarity arrangement of the six sub-pixels 100 connected to the six data lines S is changed to R-G + B-R + G-B + by the 5 th frame, the six sub-pixels 100 to which the six data lines S of the 6 th to 8 th frames are connected are then all arranged in polarity R-G + B-R + G-B +. The polarity arrangement of the six sub-pixels 100 connected to the six data lines S of the 1 st frame to the 4 th frame in the next polarity inversion driving period T is changed to R + G-B + R-G + B-, and the polarity arrangement of the six sub-pixels 100 connected to the six data lines S of the 5 th frame to the 8 th frame is changed to R-G + B-R + G-B +, which are sequentially inverted. The driving method adopted by the second driving mode is that the polarities of all the sub-pixels are inverted once after at least 2 frames of scanning, so that the power consumption increase caused by the fact that power consumption is consumed by positive and negative switching (charging the positive data line to change the positive data line into the negative polarity and charging the negative data line to change the positive polarity) during high-frequency driving can be avoided, power consumption can be saved, meanwhile, the charging time is met, and the charging efficiency is improved.
Therefore, the driving method of the display panel provided by the embodiment can be compatible with the high-frequency driving mode and the low-frequency driving mode, is suitable for switching operation of various different driving frequencies, can prevent fixed potential from causing impurity ions in the adsorbed liquid crystal and causing problems such as ghost, saves power consumption, meets charging time, and is beneficial to improving charging efficiency.
It should be noted that it is determined that different driving modes of the display panel of this embodiment may be selected and determined by an external main controller feeding a switching instruction, when a user needs to perform a general operation such as a simple short message or chat, the external main controller feeding an instruction to start the first driving mode and close the second driving mode, the driving method of the display panel adopts the method of the first driving mode, and when the user needs to perform a high performance operation such as video watching or game operation, the external main controller feeding an instruction to start the second driving mode and close the first driving mode, the driving method of the display panel adopts the method of the second driving mode.
It should be further noted that, the second driving mode in this embodiment is illustrated by taking 4 frames as a polarity inversion driving period or 8 frames as a polarity inversion driving period, and it can be understood that other number of frames can also be taken as a polarity inversion driving period.
In some optional embodiments, please continue to refer to fig. 1 to fig. 6, in this embodiment, the polarity arrangement of each frame is: the two columns of sub-pixel columns 100L are repeated with a period of two, and the sub-pixels 100 in the first column of sub-pixel columns 100L and the sub-pixels 100 in the second column of sub-pixel columns 100L have different polarities. That is, along the first direction X, the signal polarities of the adjacent two data lines are opposite.
This embodiment further explains that in the driving method of the display panel, in the first driving mode and the second driving mode, the polarity arrangement manner of each frame is: the two rows of sub-pixel arrays 100L are repeated periodically, and half of the data lines of the sub-pixels 100 in the first row of sub-pixel arrays 100L and the half of the data lines of the sub-pixels 100 in the second row of sub-pixel arrays 100L, which have different polarities, are positive, that is, along the first direction X, the signal polarities of two adjacent data lines S are opposite, so that in the driving process of the display panel, half of the data lines S are positive, half of the data lines S are negative, and simultaneously, any two adjacent data lines S are further opposite in electrical property, and further, the couplings of the positive and negative data lines and the common electrode are mutually cancelled, so that the problem of abnormal display pictures caused by coupling capacitance between the data lines and the common electrode in the liquid crystal product can be solved, and the display quality of the display panel can be improved.
In some alternative embodiments, please continue to refer to fig. 1-6, in this embodiment, the polarities of the sub-pixels 100 in the same sub-pixel row 101L are the same.
The present embodiment further explains that the polarities of the sub-pixels 100 in the same row of the sub-pixel rows 101L are the same, so that the sub-pixels 100 in the same row of the sub-pixel rows 101L can be electrically connected to the same data line S, that is, the data voltage signals of the sub-pixels 100 in the same row of the sub-pixel rows 101L can be transmitted and written through the same data line S, and further, the connection circuit between each data line S extending along the second direction Y and the driving chip (not shown) providing the data voltage signals can be simplified, the connection difficulty between the driving chip and each data line S is reduced, which is beneficial to simplifying the process and improving the process efficiency.
In some alternative embodiments, with continuing reference to fig. 1 and fig. 4 to fig. 6, in the present embodiment, in the second driving mode, in each polarity inversion driving period T, the signal value variation range of the data line S corresponding to the 1 st frame and the n +1 th frame is-a- + B, and the signal value variation range of the data line S corresponding to the 2 nd frame to the nth frame and the n +2 nd frame to the 2 nth frame is + a- + B, where a and B are positive numbers.
This embodiment further explains that in the second driving mode, only during each polarity inversion driving period T, the signal value of the corresponding data line S is switched between a positive value and a negative value to satisfy the charging time, and when the polarity is the same in the adjacent two frames from the frame 2 to the frame n or from the frame n +2 to the frame 2, i.e. the polarity arrangement of the adjacent two frames is the same, and the polarity is the same, the signal value of the corresponding data line S can be changed only between the positive values to realize different gray scales, for example, 0-5V represents the gray scale of 0-255 (0V is taken as the middle line 0 gray scale, i.e. the black frame, both side gray scales are gradually raised, and ± 5V is the white frame gray scale 255), when the polarity arrangement of the adjacent two frames is the same, and the polarity is the same, the required gray scale value only needs to be changed from +5V to +4V, and does not need to be changed from +5V to-4V, and the time consumed for changing from +5V to-4V is longer than the time consumed for changing from +5V to +4V, so that the driving method adopted by the second driving mode reverses the polarity of all the sub-pixels once after scanning for at least 2 frames, so that the power consumption caused by the fact that the positive polarity and the negative polarity are switched all the time (the positive polarity data line is charged to change into the negative polarity, and the negative polarity data line is charged to change into the positive polarity) during high-frequency driving can be avoided, the power consumption can be saved, and the charging efficiency can be improved within a fixed charging time.
In some optional embodiments, please refer to fig. 7 and 8 in combination, fig. 7 is a schematic plane structure diagram of another display panel according to an embodiment of the present invention, fig. 8 is a schematic connection structure diagram of two adjacent multiplexing units in fig. 7, the display panel 000 of the present embodiment further includes a plurality of multiplexing units 20, each multiplexing unit 20 includes a signal input terminal 201, a plurality of signal output terminals 202, a plurality of shunt control terminals CKH, and a plurality of switch transistors 203; the signal input end 201 is connected with a data input signal data, and the signal output ends 202 are electrically connected with the data lines S in a one-to-one correspondence manner; the polarities of the data input signals data connected to the signal input terminals of two adjacent multiplexing units 20 are opposite, and the polarities of the signals of the data lines S connected to the signal output terminals of the same multiplexing unit 20 are the same.
Optionally, the data input signal data is provided by the driving chip 30, and the driving chip 30 may be disposed on a side of the multiplexing unit 20 away from the sub-pixel 100 along the second direction Y, wherein the driving chip 30 and the multiplexing unit 20 are both located in a non-display area NA of the display panel 000, and the pixel unit 10 is located in a display area AA of the display panel 000.
In some alternative embodiments, the connection structure of the multiplexing units 20 and the data lines S in the display panel is as shown in fig. 8, in one multiplexing unit 20, the signal outputs 202 include a first signal output 2021, a second signal output 2022, and a third signal output 2023;
the plurality of shunting control terminals CKH comprise a first shunting control terminal CKH1, a second shunting control terminal CKH2 and a third shunting control terminal CKH 3;
the plurality of switching transistors 203 includes a first switching transistor 2031, a second switching transistor 2032, and a third switching transistor 2033;
the gate of the first switching transistor 2031 of each multiplexing unit 20 is electrically connected to the first shunt control terminal CKH1, the gate of the second switching transistor 2032 of each multiplexing unit 20 is electrically connected to the second shunt control terminal CKH2, and the gate of the third switching transistor 2033 of each multiplexing unit 20 is electrically connected to the third shunt control terminal CKH 3;
a first pole of the first switching transistor 2031 of each multiplexing unit 20 is electrically connected to the first signal output terminal 2021, a first pole of the second switching transistor 2032 of each multiplexing unit 20 is electrically connected to the second signal output terminal 2022, and a first pole of the third switching transistor 2033 of each multiplexing unit 20 is electrically connected to the third signal output terminal 2023;
the second pole of the plurality of switching transistors 2031 of each multiplexing unit 20 is electrically connected to the signal input terminal 201.
This embodiment further explains that by using the demultiplexing technique, in one multiplexing unit 20, the plurality of signal outputs 202 includes a first signal output 2021, a second signal output 2022, and a third signal output 2023; the plurality of shunting control terminals CKH comprise a first shunting control terminal CKH1, a second shunting control terminal CKH2 and a third shunting control terminal CKH 3; the plurality of switching transistors 203 include a first switching transistor 2031, a second switching transistor 2032, and a third switching transistor 2033, and each multiplexing unit 20 has a structure in which the ratio of the input terminal to the output terminal is 1 to 3, which is advantageous for simplifying the manufacturing process of the display panel 000. Because one signal input end 201 of the multiplexing unit 20 can transmit the same data input signal data to three different signal output ends 202 through the lead of the driving chip 30, and the three different signal output ends 202 are respectively connected to different data lines S, the number of leads led out from the driving chip 30 for providing the data input signal data can be reduced, which is beneficial to reducing the width of a non-display area NA at the driving chip 30 in the second direction Y, and further can increase the range of a display area AA of the display panel 000, and more space is provided for arranging the pixel units 10, so that while the screen occupation ratio of the display panel is improved, the narrow frame of the display panel is beneficial to being realized, and the signal coupling phenomenon between the leads caused by the fact that the number of the leads for providing the data input signal data is large and the arrangement of the leads is dense can be alleviated. In this embodiment, the polarities of the data input signals data connected to the signal input terminals of two adjacent multiplexing units 20 are opposite (as shown in fig. 7 by data +, data-, data +, and data- … …), and the polarities of the signals of the data lines S connected to the signal output terminals of the same multiplexing unit 20 are the same (as shown in fig. 7 by data lines S connected to the signal output terminals of the same multiplexing unit 20 by signal polarities, and the polarities of the signals of the data lines S connected to the signal output terminals of another multiplexing unit 20 adjacent thereto by signal polarities), so that the polarity arrangement manner of each frame is repeated with two columns of subpixel columns 100L as a cycle, and the polarities of the subpixels 100 in the first column of subpixel columns 100L are different from the polarities of the subpixels 100 in the second column of subpixel columns 100L, that is, along the first direction X, the signal polarities of the two adjacent data lines are opposite, so that the effect of mutual coupling offset between the positive and negative polarity data lines and the common electrode is realized, the problem of abnormal display pictures caused by coupling capacitance between the data lines and the common electrode in a liquid crystal product is solved, and the display quality of the display panel is improved.
In some optional embodiments, please refer to fig. 9, where fig. 9 is a schematic structural diagram of a display device 111 according to an embodiment of the present invention, the display device 111 according to the embodiment includes the display panel 000 according to the above embodiment of the present invention, and the display device according to the embodiment drives and displays by using the driving method of the display panel according to any of the above embodiments. The embodiment of fig. 9 only takes a mobile phone as an example to describe the display device 111, and it should be understood that the display device 111 provided in the embodiment of the present invention may be other display devices 111 with a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the driving method of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the driving method of the display panel in each of the above embodiments, and details of this embodiment are not repeated herein.
As can be seen from the foregoing embodiments, the driving method of the display panel and the display device provided in the present invention at least achieve the following beneficial effects:
in the driving modes provided by the driving method of the display panel, the first driving mode is suitable for a low-frequency driving mode without high performance, such as a common operation mode of short messages, chatting and the like, under the first driving mode, two frames are taken as a polarity inversion driving period, and in one polarity inversion driving period, the polarity arrangement modes of two adjacent frames are the same, and the polarities are opposite; the second driving mode is suitable for a high-frequency driving mode which needs high performance and saves power consumption, such as a movie and game interface operation mode, under the second driving mode, the polarity of all sub-pixels is inverted once after scanning at least 2 frames, and the power consumption of positive and negative switching all the time during high-frequency driving can be avoided.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present 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 a display panel, the display panel comprising:
the pixel array comprises a plurality of scanning lines arranged along a second direction and extending along a first direction, a plurality of data lines arranged along the first direction and extending along the second direction, and a plurality of pixel units arranged in an array, wherein each pixel unit comprises a plurality of sub-pixels, the scanning lines and the data lines intersect to define an area where the sub-pixels are located, and each sub-pixel is correspondingly connected with the scanning lines and the data lines respectively; along the second direction, a plurality of the sub-pixels form a plurality of sub-pixel rows, and along the first direction, a plurality of the sub-pixels form a plurality of sub-pixel columns;
the driving method includes:
providing a first drive mode and a second drive mode;
in the first driving mode, two frames are taken as a polarity inversion driving period, and in one polarity inversion driving period, the polarity arrangement modes of two adjacent frames are the same, and the polarities are opposite;
in the second driving mode, at least 2n frames are used as a polarity inversion driving period, and in the polarity inversion driving period, the 1 st frame to the nth frame have the same polarity arrangement mode and the same polarity; the polarity arrangement modes of the (n + 1) th frame to the 2n th frame are the same, and the polarities are also the same; the 1 st frame and the (n + 1) th frame have the same polarity arrangement mode and opposite polarities; wherein n is not less than 2 and n is an integer.
2. The method for driving a display panel according to claim 1,
the polarity arrangement of each frame is: and repeating the two rows of the sub-pixel columns in a period, wherein the polarities of the sub-pixels on the first row of the sub-pixel columns are different from the polarities of the sub-pixels on the second row of the sub-pixel columns.
3. The method according to claim 1, wherein polarities of the sub-pixels in the sub-pixel columns in the same column are the same.
4. The method according to claim 1, wherein in the second driving mode, in each of the polarity inversion driving periods, a signal value change range of the data lines corresponding to 1 st and n +1 st frames is-a to + B, and a signal value change range of the data lines corresponding to 2 nd to nth frames, n +2 nd to 2 nth frames is + a to + B, where a and B are positive numbers.
5. The method according to claim 1, wherein each of the sub-pixel rows comprises a plurality of red sub-pixels, a plurality of green sub-pixels, and a plurality of blue sub-pixels; in each sub-pixel row, the red sub-pixels, the green sub-pixels and the blue sub-pixels are alternately arranged, and the pixel unit at least comprises one red sub-pixel, one green sub-pixel and one blue sub-pixel.
6. The method according to claim 1, wherein in the first direction, the polarities of signals of two adjacent data lines are opposite.
7. The method for driving a display panel according to claim 1, wherein the display panel further comprises a plurality of multiplexing units, each of the multiplexing units comprising a signal input terminal and a plurality of signal output terminals, a plurality of shunt control terminals, a plurality of switching transistors;
the signal input end is connected with a data input signal, and the signal output ends are electrically connected with the data lines in a one-to-one correspondence manner;
the data input signals connected with the signal input ends of two adjacent multiplexing units have opposite polarities, and the signal polarities of the data lines connected with the signal output ends of the same multiplexing unit are the same.
8. The method for driving a display panel according to claim 7,
the plurality of signal output ends comprise a first signal output end, a second signal output end and a third signal output end;
the plurality of branch control ends comprise a first branch control end, a second branch control end and a third branch control end;
the plurality of switching transistors includes a first switching transistor, a second switching transistor, a third switching transistor;
a gate of the first switching transistor of each multiplexing unit is electrically connected to the first shunt control terminal, a gate of the second switching transistor of each multiplexing unit is electrically connected to the second shunt control terminal, and a gate of the third switching transistor of each multiplexing unit is electrically connected to the third shunt control terminal;
a first pole of the first switching transistor of each multiplexing unit is electrically connected to the first signal output terminal, a first pole of the second switching transistor of each multiplexing unit is electrically connected to the second signal output terminal, and a first pole of the third switching transistor of each multiplexing unit is electrically connected to the third signal output terminal;
the second poles of the plurality of switching transistors of each of the multiplexing units are electrically connected to the signal input terminal.
9. The method according to claim 1, wherein each of the sub-pixels includes a thin film transistor and a pixel electrode, a gate electrode of the thin film transistor is electrically connected to the scan line, a source electrode of the thin film transistor is electrically connected to the data line, and a drain electrode of the thin film transistor is electrically connected to the pixel electrode.
10. The method for driving a display panel according to claim 9, wherein the thin film transistor is any one of an N-type thin film transistor and a P-type thin film transistor.
11. A display device which performs driving display by using the driving method of the display panel according to any one of claims 1 to 10.
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