Driving method, driving circuit and display device of display panel

Abstract

The application provides a display panel driving method, a driving circuit and a display device. In the display panel driving method, a first driving mode is switched according to a trigger instruction, and in the first driving mode, the proportion of an invalid timing period and an effective timing period in each frame scanning period is adjusted, the invalid timing period is increased, the output frequency of a data signal is adjusted according to the proportion of the invalid timing period and the effective timing period, and the data signal is output at the adjusted output frequency in the effective timing period, so that the data signal pushing frequency of the effective timing period is increased, the alternating frequency of bright and dark lines is improved, the vertical bright and dark lines cannot be observed in the case of moving visual observation and frame reduction, and due to the fact that the charging time of the data signal in the effective timing period is compressed, the parasitic capacitance difference between two pixel units of a pixel unit group is reduced, the pixel voltage difference between the two pixel units is small, and the vertical bright and dark lines are further reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display panel, and particularly relates to a driving method of display panel, a driving circuit and a display device. BACKGROUND

[0002] In the HSD (Half Source Driving) pixel array, two adjacent pixel units in the horizontal direction share one data line. Compared with the traditional pixel array, the data line can be reduced by half. Meanwhile, adjacent pixel units in the same row are connected to different scanning lines, and pixel units spaced one pixel unit apart from each other in the same row are connected to the same scanning line. Therefore, the number of scanning lines is doubled compared with the traditional pixel array.

[0003] Since the pixel electrode of the HSD pixel array is designed as "long-short hand", the pixel electrode close to the connected pixel electrode can be understood as a short-hand electrode, and the pixel electrode far from the connected pixel electrode can be understood as a long-hand electrode, as shown in FIG. 1. Figure 1 As shown in FIG. 1, the parasitic capacitances Cgs-L of the long-hand pixel unit and the parasitic capacitances Cgs-S of the short-hand pixel unit are different. As can be known from the feed voltage formula Vth=Cgs*(Vgh-Vgl) / C-Total, the feed voltages Vth-L and Vth-S of the long-hand pixel unit and the short-hand pixel unit are also different. Finally, the long-hand pixel voltage Vpixel-L and the short-hand pixel voltage Vpixel-S used to realize the picture display are different.

[0004] The polarity inversion mode of the data signal is column inversion, that is, in the i-th frame time, the data signals of the Nth, N+2th, N+4th… columns are negative polarity, and the data signals of the N+1th, N+3th, N+5th… columns are positive polarity. In the i+1-th frame time, the data signals of the Nth, N+2th, N+4th… columns are positive polarity, and the data signals of the N+1th, N+3th, N+5th… columns are negative polarity. The polarity of each column of data is reversed in the i-th frame and the i+1-th frame.

[0005] During the i-th frame, the Vpixel-L of the long-hand pixel unit connected to the positive polarity is less than the Vpixel-S of the short-hand pixel unit, the long-hand pixel unit is dark, and the short-hand pixel unit is bright. The Vpixel-L of the long-hand pixel unit connected to the negative polarity is greater than the Vpixel-S of the short-hand pixel unit, the long-hand pixel unit is bright, and the short-hand pixel unit is dark. From a macroscopic point of view, bright vertical lines and dim vertical lines will be seen alternating with each other, that is, vertical bright-dark lines. During the i+1-th frame, the polarity of each column of data is reversed, and the positions of the bright lines and the dark lines are exchanged.

[0006] When the human eye is visually static, the bright and dark line alternation problem caused by the polarity column inversion can be offset in time, that is, a column is a bright line for half the time and a dark line for the other half of the time, and since the time integrals offset each other, the bright and dark line display abnormalities cannot be seen. However, when the human eye is visually moving, the frame rate is reduced, and when the frame rate is less than 24 Hz, obvious display abnormalities can be seen, and the bright and dark line problem in the vertical direction occurs. SUMMARY

[0007] The purpose of the present application is to provide a display panel driving method, aiming to reduce the vertical bright and dark line problem of the traditional display panel driving mode when moving visually.

[0008] The first aspect of the embodiment of the present application provides a display panel driving method, the display panel comprising a plurality of data lines, a plurality of scan lines and a plurality of pixel units arranged in an array, two adjacent pixel units in the same row form a pixel unit group, the adjacent pixel unit groups are connected to two adjacent data lines, two adjacent pixel units in the same row are connected to the same data line and are connected to two adjacent different scan lines, respectively, two diagonal pixel units in the same column pixel unit group are connected to two adjacent different scan lines, respectively, and two pixel units separated by one pixel unit in the same row are connected to the same scan line.

[0009] The display panel driving method comprises:

[0010] According to the trigger instruction, the first driving mode is switched to, and in the first driving mode, the proportion of the invalid timing period and the effective timing period in each frame scanning period is adjusted, wherein the effective timing period is ahead of the invalid timing period, and the proportion of the invalid timing period and the effective timing period is k, 1

[0011] According to the proportion of the invalid timing period and the effective timing period, the output frequency of the data signal is adjusted, and the data signal is output according to the adjusted output frequency in the effective timing period, wherein the output frequency of the data signal is f=f0*k, wherein f is the initial frequency of the data signal.

[0012] Optionally, the display panel driving method further comprises:

[0013] In the first driving mode, the polarity of the data signal output to each column data line is switched;

[0014] In the same frame scanning period, the polarities of the two data lines of adjacent columns are opposite, and in the adjacent scanning period, the polarities of the data lines of the same column are opposite.

[0015] Optionally, the display panel driving method further comprises:

[0016] switching to a second driving mode according to the trigger instruction, and switching the polarity of the data signals output to the data lines in the second driving mode, wherein the plurality of data lines are divided into n data line groups, each data line group including m data lines of the same number of columns, and m is greater than 2;

[0017] in the i-th frame scanning period, the polarity of the data signal of the first column data line of each data line group is a first polarity, and the polarity of the data signal of the second column data line to the m-th column data line of each data line group is a second polarity, the first polarity and the second polarity being opposite polarities;

[0018] in the i+1-th frame scanning period, the polarity of the data signal of the first column data line of each data line group is the second polarity, and the polarity of the data signal of the second column data line to the m-th column data line of each data line group is the first polarity, i being a positive integer.

[0019] Optionally, the driving method of the display panel further comprises:

[0020] switching to a third driving mode according to the trigger instruction, and switching the polarity of the data signals output to the data lines in the third driving mode, wherein the plurality of data lines are divided into n data line groups, each data line group including m data lines, the value of m of the j-th data line group to the j+K-th data line group being different, the value of m of the j-th data line group and the j+K+1-th data line group being equal, j and K being positive integers;

[0021] in the i-th frame scanning period, the polarity of the data signal of the first column data line of each data line group is a first polarity, and the polarity of the data signal of the second column data line to the m-th column data line of each data line group is a second polarity, the first polarity and the second polarity being opposite polarities;

[0022] in the i+1-th frame scanning period, the polarity of the data signal of the first column data line of each data line group is the second polarity, and the polarity of the data signal of the second column data line to the m-th column data line of each data line group is the first polarity, i being a positive integer.

[0023] Optionally, the driving method of the display panel further comprises:

[0024] outputting a row scanning signal in the effective timing period, wherein the output frequency of the row scanning signal is the same as the output frequency of the data signal.

[0025] Optionally, the driving method of the display panel further comprises:

[0026] When outputting the row scanning signal line by line, the polarity of the data signal on the same data line is switched alternately.

[0027] Optionally, the driving method of the display panel further comprises:

[0028] Switching to a fourth working mode or a fifth working mode according to the trigger instruction, wherein the fourth working mode comprises the first working mode and the second working mode, and the fifth working mode comprises the first working mode and the third working mode.

[0029] Optionally, the driving method of the display panel further comprises:

[0030] Obtaining picture information of the display panel, and triggering output of different trigger instructions to switch the working mode of the display panel when the picture information is a solid color picture or a low gray scale picture.

[0031] The second aspect of the embodiment of the application provides a driving circuit of a display panel, the display panel comprising a plurality of data lines, a plurality of scanning lines and array-arranged pixel units, two adjacent pixel units in the same row form a pixel unit group, adjacent pixel unit groups are connected with two adjacent data lines, two adjacent pixel units in the same row are connected with the same data line and are connected with two adjacent different scanning lines respectively, two diagonal pixel units in the same column pixel unit group are connected with two adjacent different scanning lines respectively, and two pixel units spaced by one pixel unit in the same row are connected with the same scanning line.

[0032] The driving circuit of the display panel comprises a source driving circuit, a gate driving circuit and a timing controller, the timing controller is connected with the source driving circuit and the gate driving circuit respectively, the source driving circuit is connected with the plurality of data lines of the display panel, and the gate driving circuit is connected with the plurality of scanning lines of the display panel.

[0033] The timing controller is used for controlling the gate driving circuit and the source driving circuit to realize the driving method of the display panel.

[0034] The third aspect of the embodiment of the application provides a display device, comprising the display panel and the driving circuit of the display panel, and the display panel is connected with the driving circuit of the display panel.

[0035] Compared with the prior art, the embodiment of the present application has the beneficial effects that: for the display panel of the HSD pixel array, in the driving method of the display panel, the first driving mode is switched according to the trigger instruction, and in the first driving mode, the proportion of the invalid timing period and the valid timing period in each frame scanning period is adjusted, the invalid timing period is increased, the output frequency of the data signal is adjusted according to the proportion of the invalid timing period and the valid timing period, and the data signal is output according to the adjusted output frequency in the valid timing period, so that the data signal pushing frequency of the valid timing period is increased, the alternating frequency of the bright and dark lines is improved, in the case of moving visual observation frame reduction, the vertical bright and dark lines cannot be observed, and because the charging time of the data signal in the valid timing period is compressed, the parasitic capacitance difference of the two pixel units of the pixel unit group is reduced, the pixel voltage difference of the two pixel units is small, and the vertical bright and dark lines are further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0037] Figure 1 The first structure diagram of the display panel provided for the first embodiment of the present application;

[0038] Figure 2 The first flowchart of the driving method of the display panel provided for the first embodiment of the present application;

[0039] Figure 3 The first waveform diagram of the data signal provided for the first embodiment of the present application;

[0040] Figure 4 The second waveform diagram of the data signal provided for the first embodiment of the present application;

[0041] Figure 5 The second flowchart of the driving method of the display panel provided for the first embodiment of the present application;

[0042] Figure 6 The second structure diagram of the display panel provided for the first embodiment of the present application;

[0043] Figure 7 The first structure diagram of the display panel provided for the second embodiment of the present application;

[0044] Figure 8 The second structure diagram of the display panel provided for the second embodiment of the present application;

[0045] Figure 9 A third structural schematic diagram of a display panel according to Embodiment Two of the present application is provided;

[0046] Figure 10 A fourth structural schematic diagram of a display panel according to Embodiment Two of the present application is provided;

[0047] Figure 11 A structural schematic diagram of a display panel according to Embodiment Three of the present application is provided;

[0048] Figure 12 A structural schematic diagram of a display panel according to Embodiment Four of the present application is provided;

[0049] Figure 13 A structural schematic diagram of a display panel according to Embodiment Six of the present application is provided.

[0050] In the drawings, various reference numerals are used to refer to the same or similar items throughout the drawings.

[0051] 1, a driving method of a display panel; 2, a display panel; 21, a pixel unit; 22, a group of pixel units; 100, a gate drive circuit; 200, a timing controller; 300, a source drive circuit;

[0052] T1, an effective timing period; T2, an ineffective timing period; STV, a start signal; DATA, a data signal. DETAILED DESCRIPTION

[0053] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0054] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0055] Embodiment One

[0056] The first aspect of the embodiments of the present application proposes a driving method of a display panel 2, which includes a plurality of data lines, a plurality of scan lines and an array of pixel units 21. The plurality of data lines are arranged in a horizontal direction in sequence with intervals, the plurality of scan lines are arranged in a vertical direction in sequence with intervals, the plurality of data lines are used for data data signals DATA, and the plurality of scan lines are used for inputting row opening signals line by line.

[0057] As shown in Figure 1 Two adjacent pixel units 21 in the same row form a pixel unit group 22, and the adjacent pixel unit groups 22 are connected with two adjacent data lines respectively. Two adjacent pixel units 21 in the same row are connected with the same data line and are connected with two adjacent scanning lines respectively. Two diagonal pixel units 21 in the same column are connected with two adjacent scanning lines respectively. Two pixel units 21 spaced by one pixel unit 21 in the same row are connected with the same scanning line.

[0058] The pixel unit 21 is connected with the data line and the scanning line in a long-short hand structure. The polarity of the data signal DATA on the data line can be changed or unchanged in the row scanning. As a whole, the data line can realize the positive-negative-positive-negative polarity inversion in the column flipping mode by using the long-short hand structure.

[0059] That is, in the i-th frame time, the data signals DATA in the N-th, N+2-th, N+4-th… columns are negative polarity, and the data signals DATA in the N-1-th, N+1-th, N+3-th… columns are positive polarity. In the i+1-th frame time, the data signals DATA in the N-th, N+2-th, N+4-th… columns are positive polarity, and the data signals DATA in the N-1-th, N+1-th, N+3-th… columns are negative polarity. The polarity of each column data in the i-th frame and the i+1-th frame is inverted.

[0060] During the i-th frame, Vpixel-L of the long-hand pixel unit 21 connected with the positive polarity is less than Vpixel-S of the short-hand pixel unit 21, the long-hand pixel unit 21 is dark, and the short-hand pixel unit 21 is bright. Vpixel-L of the long-hand pixel unit 21 connected with the negative polarity is greater than Vpixel-S of the short-hand pixel unit 21, the long-hand pixel unit 21 is bright, and the short-hand pixel unit 21 is dark. From the macroscopic view, the bright vertical lines and the dark vertical lines are alternated with each other, for example Figure 1 As shown in the figure, the pixel units 21 in the first column present the bright lines, the pixel units 21 in the second column and the pixel units 21 in the third column present the dark lines, the pixel units 21 in the fourth column and the pixel units 21 in the fifth column present the dark lines, and so on, that is, the vertical bright-dark lines. If the bright column of pixel units 21 is represented as A, and the dark column of pixel units 21 is represented as B, according to the column flipping mode, the bright-dark stripes are arranged according to the rule of ABBAABBAABB, the contrast of the bright-dark lines of each adjacent two columns is high, and the macroscopic vertical bright-dark stripes are very rough, which can be obviously perceived by the human eye.

[0061] In order to reduce the problem of vertical bright-dark lines in the shaking head vision, in the embodiment, as shown in Figure 2 The driving method of the display panel comprises the following steps:

[0062] S10. Switch to the first driving mode according to the trigger instruction, and in the first driving mode, adjust the ratio of the invalid timing period T2 to the valid timing period T1 within each frame scanning period, where the valid timing period T1 is ahead of the invalid timing period T2, and the ratio of the invalid timing period T2 to the valid timing period T1 is k, and 1 < k < 2.

[0063] As Figure 3 shown, in each frame of picture information, it includes the valid timing period T1 and the invalid timing period T2. During the pushing process of the data signal DATA, within the valid timing period T1, the data signal DATA has the effect of picture information, and within the invalid timing period T2, the data signal DATA does not push data and has no display effect.

[0064] In the initial state, the duration of the invalid timing period T2 is close to that of the valid timing period T1. Assuming that the current frequency of the data signal DATA is 60 Hz, the frequency of the picture information is 60 Hz, and the frequency of the bright and dark line alternation is 30 Hz. At this time, when observing visually by moving the viewing angle, due to the influence of moving frame dropping, the frequency of the picture seen by the human eye is less than 24 Hz, and obvious bright and dark lines will be seen.

[0065] Therefore, when improving the bright and dark line problem, switch to the first working mode after receiving the trigger instruction. In the first working mode, by increasing the invalid timing period T2, while the time of one frame scanning period remains unchanged, increase the ratio of the invalid timing period T2 and compress the ratio of the valid timing period T1. Assuming that the time of each frame scanning period is T, in order to ensure that within each frame period, the data signal DATA has sufficient charging output time, avoid insufficient charging due to too short time affecting the display effect, and at the same time take into account the bright and dark line problem, the ratio range of the invalid timing period T2 to the valid timing period T1 is defined as 1 < k < 2, that is, the invalid timing period T2 is greater than the valid timing period T1, but at most does not exceed 2 / 3 of one frame period time, that is, the duration range of the invalid timing period T2 is between 1 / 2 and 2 / 3, and the duration range of the valid timing period T1 is between 1 / 3 and 1 / 2.

[0066] S20. Adjust the output frequency of the data signal DATA according to the ratio of the invalid timing period T2 to the valid timing period T1, and output the data signal DATA at the adjusted output frequency within the valid timing period T1, where the output frequency of the data signal DATA is f = f0 * k, where f is the initial frequency of the data signal DATA.

[0067] During the driving process of display panel 2, the output frequency of data signal DATA is adjusted according to the value of k. The adjusted output frequency of data signal DATA is f = f0 * k, which means that the frequency of data signal DATA increases compared to the original frequency of data signal DATA. After receiving the frame start signal STV, the output of data signal for one frame is started. Within the effective timing period T1, the driving circuit 1 of display panel outputs data signal DATA according to the adjusted output frequency, thereby increasing the push frequency of data signal DATA within the effective timing period T1 and increasing the alternation frequency of bright and dark lines. When observing the frame drop while moving, vertical bright and dark lines will not be observed. Furthermore, because the charging time of data signal DATA is compressed within the effective timing period T1, the parasitic capacitance difference between the two pixel units 21 of pixel unit group 22 is reduced, and the pixel voltage difference between the two pixel units 21 is reduced, further reducing vertical bright and dark lines and improving the display effect.

[0068] For example, such as Figure 4 As shown, when the value of k is 1.5, compared with the original initial output frequency of 60Hz, the output frequency of the data signal DATA increases to 90Hz, and the frequency of alternating bright and dark lines is 45Hz. When observing the frame rate reduction by moving the eyes, the frequency of the image seen by the human eye is greater than 24Hz, and the vertical bright and dark lines will not be observed.

[0069] Correspondingly, in order to achieve column flipping, such as Figure 5 As shown, in an optional embodiment, the driving method for the display panel further includes:

[0070] S30. In the first drive mode, switch the polarity of the data signal DATA output to each column of data lines;

[0071] Within the same frame scanning period, the polarities of the two data lines in adjacent columns are opposite, and within adjacent frame scanning periods, the polarities of the data lines in the same column are opposite.

[0072] By increasing the push frequency of the data signal DATA while adding an invalid timing period T2, column flipping is achieved, that is, within the i-th frame time, as... Figure 1 As shown, the data signals DATA in columns N, N+2, N+4… are negative, and the data signals DATA in columns N-1, N+1, N+3… are positive. During the (i+1)th frame time, as... Figure 6 As shown, the data signals DATA in columns N, N+2, N+4... are positive, and the data signals DATA in columns N-1, N+1, N+3... are negative.

[0073] In the same frame scanning process, the polarity of the data signal DATA of the same column is unchanged, and the pixel unit group 22 connected with the data line in cross is of the same polarity in the line scanning, and the data line can realize the positive-negative-positive-negative polarity inversion in the column inversion mode, and the polarity does not need to be converted in the line scanning driving process, so that the voltage is constant in each frame picture, and the positive-negative polarity switching is not needed, and the problems of the vertical bright-dark line, the power consumption and the signal interference in the vertical direction are effectively improved.

[0074] Further, in order to realize the line-by-line scanning of the display panel 2, in an optional embodiment, the driving method of the display panel further comprises:

[0075] S60, outputting a line scanning signal in the effective timing period T1, wherein the output frequency of the line scanning signal is the same as the output frequency of the data signal DATA.

[0076] After the push frequency of the data signal DATA is increased, the charging time of each row of pixel units 21 is shortened, and the speed of switching from one row of pixel units 21 to the next adjacent row of pixel units 21 is increased. Therefore, in order to match the output frequency of the data signal DATA and the charging effect, the line scanning signal is outputted line by line according to the same output frequency while the data signal DATA is outputted after adjustment in the effective timing period T1, so that the thin film transistor inside each pixel unit 21 is effectively turned on at the same time when each row of data signal DATA is outputted, thereby receiving the data signal DATA of the corresponding output frequency, and thereby charging and displaying for a corresponding time length, so as to ensure the charging effect and improve the display effect.

[0077] Embodiment Two

[0078] In order to solve the problem of bright-dark line, in another embodiment, the driving method of the display panel further comprises:

[0079] S40, switching to a second working mode according to a trigger instruction, and in the second driving mode, the polarity of the data signal DATA outputted to each column of data lines is switched, wherein the plurality of data lines are divided into n data line groups, each data line group includes m data lines of the same column number, and m is greater than 2;

[0080] In the i-th frame scanning period, the polarity of the data signal DATA of the first column data line of each data line group is a first polarity, and the polarity of the data signal DATA of the second column data line to the m-th column data line of each data line group is a second polarity, and the first polarity and the second polarity are opposite polarities;

[0081] In the i+1-th frame scanning period, the polarity of the data signal DATA of the first column data line of each data line group is the second polarity, and the polarity of the data signal DATA of the second column data line to the m-th column data line of each data line group is the first polarity, and i is a positive integer.

[0082] In each frame of output data signal DATA, the original data signal DATA is flipped in a way that the polarity of the data signal DATA of the data lines of adjacent columns is opposite. When switching to the next frame, the polarity of the data signal DATA of the data lines of each column is switched, for example Figure 1 As shown, the first column of pixel units 21 presents a bright line, the second and third columns of pixel units 21 present dark lines, the fourth and fifth columns of pixel units 21 present dark lines, and so on, that is, vertical bright and dark lines. If a bright column of pixel units 21 is represented as A and a dim column of pixel units 21 is represented as B, according to the column flipping manner, the bright and dark stripes are arranged according to the rule of ABBAABBAABB, and the contrast between each adjacent two columns is high, which macroscopically displays very rough vertical bright and dark stripes that can be obviously perceived by the human eye.

[0083] Therefore, in the embodiment, the flipping manner of the data signal DATA is changed, and the multiple columns of data lines are divided into n groups, each group including m data lines, and in each group of m data lines, the polarity of the data line of the first column is opposite to the polarity of the data lines of the last m-1 columns, and the polarity of the data lines of the last m-1 columns of each group is the same.

[0084] For example Figure 7 As shown, three columns of data lines are taken as a group, that is, the polarity of each data line of each group of data lines is positive, negative, or negative, respectively, in the i-th frame scanning period. The polarity of the data signal DATA of the first column of data lines of each group of data lines is negative, and the polarity of the data signal DATA of the second and third columns of data lines of each group of data lines is positive. If a bright column of pixel units 21 is represented as A and a dim column of pixel units 21 is represented as B, according to the adjusted column flipping manner of the data signal DATA, the bright and dark stripes are arranged according to the rule of BAAABABAAAAB, and the vertical adjacent bright and dark stripes do not have regularity. The bright and dark stripes of each adjacent two columns are disturbed, the contrast between each adjacent two columns is weakened, and as shown in Figure 7 The part of the black frame in the middle shows that the brightness of some arbitrary adjacent even pixel units 21 can be offset to the same brightness, which can further improve the vertical bright and dark lines.

[0085] As shown in Figure 8As shown, during the (i+1)th frame scanning cycle, the polarity of the data signal DATA of the first column of data lines in each data line group is positive, and the polarity of the data signal DATA of the second and third columns of data lines in each data line group is negative. According to the column flipping method of the adjusted data signal DATA, the bright and dark stripes are irregularly arranged according to ABBABABBBBA. From a macroscopic perspective, the vertically alternating bright and dark stripes are not regular, and the bright and dark stripes of each two adjacent columns are disrupted, weakening the contrast between the bright and dark of the two adjacent columns. Therefore, by changing the column flipping method, the display of bright and dark lines is reduced, and the display effect of display panel 2 is improved.

[0086] Or such as Figure 9 As shown, data lines are grouped into four columns, with the polarity of each data line in each group being positive-negative-negative or negative-positive-positive. During the i-th frame scanning period, the polarity of the data signal DATA in the first column of each data line group is negative, while the polarity of the data signal DATA in the second to fourth columns of each data line group is positive. If a bright column of pixel units 21 is represented as A, and a dark column of pixel units 21 is represented as B, according to the column flipping method of the adjusted data signal DATA, the bright and dark stripes are irregularly arranged according to BAAABAABBABA. Macroscopically, the vertically alternating bright and dark stripes lack regularity. The bright and dark stripes in each adjacent column are disrupted, weakening the contrast between adjacent columns. Furthermore, as... Figure 9 The black box in the middle shows that the brightness of all adjacent even-numbered pixel units 21 can cancel each other out to equal brightness, which can further improve the vertical bright and dark lines.

[0087] like Figure 10 As shown, during the (i+1)th frame scanning cycle, the polarity of the data signal DATA of the first column of data lines in each data line group is positive, and the polarity of the data signal DATA of the second to fourth columns of data lines in each data line group is negative. According to the column flipping method of the adjusted data signal DATA, the bright and dark stripes are irregularly arranged according to ABBABBAABAB. From a macroscopic perspective, the vertically alternating bright and dark stripes are not regular, and the bright and dark stripes are weakened. Therefore, by changing the column flipping method, the display of bright and dark lines is reduced, and the display effect of display panel 2 is improved.

[0088] Furthermore, in order to achieve progressive scanning of the display panel 2, in an optional embodiment, the driving method of the display panel further includes:

[0089] S60. Output a row scan signal within the effective timing period T1, wherein the output frequency of the row scan signal is the same as the output frequency of the data signal DATA.

[0090] In order to match the output frequency of the data signal DATA and the charging effect, the row scanning signal is outputted row by row according to the same output frequency while the data signal DATA is outputted in the effective timing period T1, so that the thin film transistor inside each pixel unit 21 is effectively turned on while each row of data signal DATA is to be outputted, thereby receiving the data signal DATA corresponding to the output frequency, and thereby performing charging and display for a corresponding time length, ensuring the charging effect and improving the display effect.

[0091] Embodiment Three

[0092] In another optional embodiment, in order to solve the light and dark line problem, the driving method of the display panel further comprises:

[0093] S50, according to the trigger instruction, switching to the third working mode, and in the third driving mode, the polarity of the data signal DATA output to each column data line is switched, wherein the plurality of column data lines are divided into n data line groups, each data line group includes m data lines, the value of m of the jth data line group to the j+Kth data line group is not equal, the value of m of the jth data line group and the j+K+1th data line group is equal, and j and K are positive integers;

[0094] In the i-th frame scanning period, the polarity of the data signal DATA of the first column data line of each data line group is the first polarity, and the polarity of the data signal DATA of the second column data line to the mth column data line of each data line group is the second polarity, and the first polarity and the second polarity are opposite polarities;

[0095] In the i+1th frame scanning period, the polarity of the data signal DATA of the first column data line of each data line group is the second polarity, and the polarity of the data signal DATA of the second column data line to the mth column data line of each data line group is the first polarity, and i is a positive integer.

[0096] In this embodiment, unlike embodiment two, the display panel 2 is divided into a plurality of large groups, the number of data lines and the polarity distribution of each large group are the same, each large group includes K data line groups, and the number of data lines contained in the K data line groups of each large group is different, for example Figure 11 As shown, it is assumed that it includes data lines Dn-1~Dn+12, which is a large group, and another large group also has 14 data lines and the same polarity distribution, one large group is divided into four small groups, the first data line group includes two data lines, the second data line group includes three data lines, the third data line group includes four data lines, and the fourth data line group includes five data lines, wherein the first column data line of each data line group is of the first polarity, and the remaining column data lines of each data line group are of the second polarity.

[0097] In the i-th frame scanning period, the polarities of the data lines Dn-1~Dn+12 are first polarity, second polarity, first polarity, second polarity, second polarity, first polarity, second polarity, second polarity, second polarity, first polarity, second polarity, second polarity, second polarity, and second polarity in turn. According to the column flipping mode of the adjusted data signal DATA, the bright and dark stripes are arranged irregularly. Macroscopically, the bright and dark stripes vertically adjacent to each other do not have regularity, each adjacent two columns of bright and dark stripes are disturbed, the bright and dark contrast of each adjacent two columns is weakened, and the vertical bright and dark lines can be improved.

[0098] Further, in order to realize the line-by-line scanning of the display panel 2, in an optional embodiment, the driving method of the display panel further includes:

[0099] S60, outputting a line scanning signal in the effective timing period T1, wherein the output frequency of the line scanning signal is the same as the output frequency of the data signal DATA.

[0100] In order to match the output frequency of the data signal DATA and the charging effect, the line scanning signal is outputted line by line according to the same output frequency while the data signal DATA is outputted in the effective timing period T1, so that the thin film transistor inside each pixel unit 21 is effectively turned on while each row of data signal DATA is to be outputted, thereby receiving the data signal DATA corresponding to the output frequency, and charging and displaying for a corresponding time length, so as to ensure the charging effect and improve the display effect.

[0101] Embodiment Four

[0102] In the above embodiment, the problem of bright and dark lines is improved by changing the output frequency or flipping mode of the data signal DATA when the line scanning signal is outputted. In order to further improve the display effect, in an optional embodiment, the driving method of the display panel further includes:

[0103] S70, alternately switching the polarity of the data signal DATA on the same data line when the line scanning signal is outputted line by line.

[0104] That is, when the data signal DATA is outputted to a corresponding number of pixel units 21 in the same column, the polarity of the data signal DATA is switched when the data signal DATA is outputted to the pixel units 21 in the next column or another part of the same column, so as to realize positive and negative color mixing and improve the display effect.

[0105] For example Figure 12As shown, assuming the polarities of adjacent data lines are opposite, assuming the polarities of the initial data lines are positive-negative-positive-negative, the polarities of each column of data lines are reversed when outputting the row scanning signal line by line in a frame scanning period, after a frame scanning ends, the polarities of the pixel units 21 of adjacent rows in the same column are opposite, and the polarities of the two pixel units 21 connected to the same data line are opposite, overall, the brightness mixing under positive and negative polarities is realized, the brightness difference is reduced, and the display effect is improved.

[0106] Embodiment five

[0107] In order to further reduce the vertical bright and dark lines and improve the display effect, different working modes can also be combined and synchronized, in an optional embodiment, the driving method of the display panel further includes:

[0108] S80, switching to the fourth working mode or the fifth working mode according to the trigger instruction, wherein the fourth working mode includes the first working mode and the second working mode, and the fifth working mode includes the first working mode and the third working mode.

[0109] In this embodiment, different trigger instructions can be output according to display requirements, and the driving circuit 1 of the display panel switches to one of the first working mode, the second working mode, the third working mode, the fourth working mode and the fifth working mode according to different trigger instructions, or selects one working mode in the current frame and selects another working mode in the next frame.

[0110] The fourth working mode includes the first working mode and the second working mode, that is, the length of the invalid timing period T2 is increased, and the pushing frequency of the data signal DATA is increased, in the case of mobile visual observation and frame reduction, the vertical bright and dark lines cannot be observed, and because the charging time of the data signal DATA in the effective timing period T1 is compressed, the parasitic capacitance difference of the two pixel units 21 of the pixel unit group 22 is reduced, the pixel voltage difference of the two pixel units 21 is small, and the vertical bright and dark lines are further reduced.

[0111] At the same time, the flip mode of the data signal DATA is changed, and the regular polarity flip mode in embodiment two is adopted, so that the bright and dark stripes are arranged irregularly, the bright and dark stripes are weakened, and the display effect of the display panel 2 is further improved.

[0112] And the fifth working mode includes the first working mode and the third working mode, that is, the length of the invalid timing period T2 is increased, and the pushing frequency of the data signal DATA is increased, in the case of mobile visual observation and frame reduction, the vertical bright and dark lines cannot be observed, and because the charging time of the data signal DATA in the effective timing period T1 is compressed, the parasitic capacitance difference of the two pixel units 21 of the pixel unit group 22 is reduced, the pixel voltage difference of the two pixel units 21 is small, and the vertical bright and dark lines are further reduced.

[0113] Meanwhile, the flip mode of the data signal DATA is changed to the irregular polarity flip mode in Embodiment Three, so that the bright and dark stripes are irregularly arranged and weakened, and the display effect of the display panel 2 is further improved.

[0114] The trigger instruction can be output according to user selection, and can also be automatically switched according to the display effect of the current display panel 2. In an optional embodiment, the driving method of the display panel further includes:

[0115] S90, obtaining the picture information of the display panel 2, and triggering different trigger instructions to switch the working mode of the display panel 2 when the picture information is a solid color picture or a low gray scale picture.

[0116] In this embodiment, the vertical bright and dark lines are more obvious when the picture is a solid color picture or a low gray scale picture. When the gray scale is low, the overall brightness of the display panel 2 is low, and the vertical bright and dark lines are more obvious. Therefore, the selection of the corresponding working mode can be made according to the picture information.

[0117] The brightness detection unit can be configured to detect the picture information of the current display panel 2, or directly read the size of the data signal DATA output by the display panel 2 to determine the picture of the current display panel 2. When a solid color picture or a low gray scale picture is detected, different trigger instructions are output to control the driving circuit 1 of the display panel to switch to different working modes, and the frequency adjustment, polarity adjustment and the like of the data signal DATA are performed, so as to improve the problem of vertical bright and dark lines in a solid color picture or a low gray scale picture, and improve the display effect.

[0118] It should be understood that the size of the serial number of each step in the above embodiments does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0119] The beneficial effects of this invention embodiment compared with the prior art are as follows: For the display panel 2 of the HSD pixel array, in the above-mentioned display panel driving method, the first driving mode is switched according to the trigger command, and in the first driving mode, the proportion of invalid timing period T2 and effective timing period T1 in each frame scanning cycle is adjusted to increase the invalid timing period T2, and the output frequency of data signal DATA is adjusted according to the proportion of invalid timing period T2 and effective timing period T1, and the data signal DATA is output according to the adjusted output frequency in the effective timing period T1, thereby increasing the data signal DATA push frequency in the effective timing period T1, increasing the alternation frequency of bright and dark lines, and in the case of moving visual observation of frame reduction, vertical bright and dark lines will not be observed. Furthermore, since the charging time of data signal DATA in the effective timing period T1 is compressed, the parasitic capacitance difference between the two pixel units 21 of the pixel unit group 22 is reduced, and the pixel voltage difference between the two pixel units 21 is reduced, further reducing vertical bright and dark lines.

[0120] Example 6

[0121] A second aspect of this invention provides a driving circuit 1 for a display panel, such as... Figure 1 As shown, the display panel 2 includes multiple data lines, multiple scan lines, and pixel units 21 arranged in an array. Two adjacent pixel units 21 in the same row form a pixel unit group 22. The adjacent pixel unit groups 22 are respectively connected to two adjacent data lines. Two adjacent pixel units 21 in the same row are connected to the same data line and are respectively connected to two different adjacent scan lines. In two pixel unit groups 22 in the same column, the two diagonally opposite pixel units 21 are respectively connected to two different adjacent scan lines. Two pixel units 21 in the same row with a gap of one pixel unit 21 are connected to the same scan line.

[0122] like Figure 13 As shown, the driving circuit 1 of the display panel includes a source driving circuit 300, a gate driving circuit 100 and a timing controller 200. The timing controller 200 is connected to the source driving circuit 300 and the gate driving circuit 100 respectively. The source driving circuit 300 is connected to multiple data lines of the display panel 2, and the gate driving circuit 100 is connected to multiple scan lines of the display panel 2.

[0123] The timing controller 200 is used to control the gate drive circuit 100 and the source drive circuit 300 to implement the above-described display panel driving method.

[0124] The timing controller 200 is internally provided with a memory and a processor, the memory is used for storing the program related to the driving method of the display panel, and the processor reads the corresponding control program from the memory when receiving the corresponding trigger instruction, and realizes the corresponding driving method and switches to different working modes, controls the gate driving circuit 100 to output the row scanning signal to the display panel 2 row by row to realize the frame scanning driving, and controls the source driving circuit 300 to output the data signal DATA with the corresponding output frequency and the corresponding polarity inversion mode to the display panel 2, and adjusts the frequency and polarity of the data signal DATA, so as to improve the vertical light and dark line problem under the pure color picture or low gray scale picture, and improve the display effect.

[0125] Embodiment seven

[0126] The application further provides a display device, which comprises a display panel 2 and a display panel driving circuit 1, and the specific structure of the display panel driving circuit 1 is referred to the above-mentioned embodiments. Since the display device adopts all the technical solutions of the above-mentioned embodiments, it has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. The display panel 2 is connected with the display panel driving circuit 1.

[0127] The above-mentioned embodiments are only used to illustrate the technical solutions of the application, rather than limit them; although the application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the above-mentioned embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in the protection scope of the application.

Claims

1. A driving method for a display panel, characterized in that, The display panel includes multiple data lines, multiple scan lines, and pixel units arranged in an array. Two adjacent pixel units in the same row form a pixel unit group. The adjacent pixel unit groups are respectively connected to two adjacent data lines. Two adjacent pixel units in the same row are connected to the same data line and are respectively connected to two different adjacent scan lines. In two pixel unit groups in the same column, the two diagonally opposite pixel units are respectively connected to two different adjacent scan lines. Two pixel units in the same row with a gap of one pixel unit are connected to the same scan line. The driving method for the display panel includes: The system switches to the first driving mode based on a trigger command. In this mode, the ratio of invalid timing periods to valid timing periods within each frame scan cycle is adjusted, wherein the valid timing period precedes the invalid timing period. The ratio of invalid timing periods to valid timing periods is k, 1. <k<2; The output frequency of the data signal is adjusted according to the ratio of invalid timing period to valid timing period, and the data signal is output at the adjusted output frequency within the valid timing period, wherein the output frequency of the data signal is f = f0 * k, where f is the initial frequency of the data signal.

2. The driving method for the display panel as described in claim 1, characterized in that, The driving method for the display panel further includes: In the first drive mode, the polarity of the data signal output to each column of data lines is switched; Within the same frame scanning period, the polarities of the two data lines in adjacent columns are opposite, and within adjacent frame scanning periods, the polarities of the data lines in the same column are opposite.

3. The driving method for the display panel as described in claim 1, characterized in that, The driving method for the display panel further includes: According to the trigger command, switch to the second working mode. In the second driving mode, switch the polarity of the data signal output to each column of data lines. The multiple columns of data lines are divided into n data line groups. Each data line group includes m data lines with the same number of columns, where m is greater than 2. During the i-th frame scanning period, the polarity of the data signal of the first column of data lines in each data line group is the first polarity, and the polarity of the data signal of the second column to the m-th column of data lines in each data line group is the second polarity. The first polarity and the second polarity are opposite polarities. During the (i+1)th frame scanning period, the polarity of the data signal of the first column of data lines in each data line group is the second polarity, and the polarity of the data signals of the second column to the mth column of data lines in each data line group is the first polarity, where i is a positive integer.

4. The driving method for the display panel as described in claim 3, characterized in that, The driving method for the display panel further includes: According to the trigger command, switch to the third working mode, and in the third driving mode, switch the polarity of the data signal output to each column of data lines. The multiple columns of data lines are divided into n data line groups, each data line group includes m data lines, the m values ​​of the j-th to j+K-th data line groups are not equal, the m value of the j-th data line group is equal to that of the j+K+1-th data line group, and j and K are positive integers. During the i-th frame scanning period, the polarity of the data signal of the first column of data lines in each data line group is the first polarity, and the polarity of the data signal of the second column to the m-th column of data lines in each data line group is the second polarity. The first polarity and the second polarity are opposite polarities. During the (i+1)th frame scanning period, the polarity of the data signal of the first column of data lines in each data line group is the second polarity, and the polarity of the data signals of the second column to the mth column of data lines in each data line group is the first polarity, where i is a positive integer.

5. The driving method for a display panel as described in any one of claims 1 to 4, characterized in that, The driving method for the display panel further includes: A row scan signal is output within the effective timing period, wherein the output frequency of the row scan signal is the same as the output frequency of the data signal.

6. The driving method for a display panel as described in claim 5, characterized in that, The driving method for the display panel further includes: When outputting the line scan signal line by line, the polarity of the data signal on the same data line is alternately switched.

7. The driving method for a display panel as described in claim 4, characterized in that, The driving method for the display panel further includes: The system switches to either the fourth or fifth working mode according to a trigger command. The fourth working mode includes the first and second working modes, and the fifth working mode includes the first and third working modes.

8. The driving method for a display panel as described in claim 7, characterized in that, The driving method for the display panel further includes: The display panel's screen information is acquired, and different trigger commands are output when the screen information is a solid color screen or a low grayscale screen, so as to switch the working mode of the display panel.

9. A driving circuit for a display panel, characterized in that, The display panel includes multiple data lines, multiple scan lines, and pixel units arranged in an array. Two adjacent pixel units in the same row form a pixel unit group. The adjacent pixel unit groups are respectively connected to two adjacent data lines. Two adjacent pixel units in the same row are connected to the same data line and are respectively connected to two different adjacent scan lines. In two pixel unit groups in the same column, the two diagonally opposite pixel units are respectively connected to two different adjacent scan lines. Two pixel units in the same row with a gap of one pixel unit are connected to the same scan line. The driving circuit of the display panel includes a source driving circuit, a gate driving circuit, and a timing controller. The timing controller is connected to the source driving circuit and the gate driving circuit respectively. The source driving circuit is connected to multiple data lines of the display panel, and the gate driving circuit is connected to multiple scan lines of the display panel. The timing controller is used to control the gate driving circuit and the source driving circuit to implement the driving method of the display panel as described in any one of claims 1 to 8.

10. A display device, characterized in that, It includes the display panel and the driving circuit of the display panel as described in claim 9, wherein the display panel is connected to the driving circuit of the display panel.

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