Display panel, driving method and display device

Abstract

The present application discloses a display panel, a driving method, and a display device, wherein the display panel includes: a plurality of sub-pixels arranged in an array, wherein the sub-pixels in the same column have the same polarity, and the sub-pixels in adjacent columns have opposite polarities, and each row of sub-pixels is connected to two scan lines. In the same row, positive polarity pixels are connected to a first scan line, and negative polarity pixels are connected to a second scan line. The first scan line controls the positive polarity turn-on voltage output to the positive polarity pixels, and the second scan line controls the negative polarity turn-on voltage output to the negative polarity pixels, so that both the positive polarity pixels and the negative polarity pixels reach a preset grayscale value. The present application uses two rows of scan lines to respectively control the turn-on voltages of pixels of different polarities in the same row, compensating for the charging differences between the positive and negative polarity pixels, so that both the positive polarity pixels and the negative polarity pixels reach a preset grayscale value, avoiding the phenomenon of bright and dark vertical stripes, and improving display uniformity.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel, a driving method, and a display device. Background Art

[0002] In the current display product market segment, e-sports monitors are becoming increasingly popular due to the smooth experience they bring with their high refresh rates. At the same time, in the home market, more and more users are choosing larger display products. Larger sizes mean higher resolutions, so current display products are moving towards higher resolutions and higher refresh rates. High-resolution, high-refresh-rate display panels have shorter charging times. Coupled with the capacitance differences between different rows, within the same charging time, the near-end (close to the power supply) pixel rows are more likely to reach the desired grayscale, while the far-end (far from the power supply) pixel rows sometimes cannot reach the desired grayscale, ultimately resulting in bright and dark horizontal stripes. To address this, related technologies generally use the LOD (Line-over-driving) function to compensate for the horizontal stripe problem. The LOD function uses a LOD Table (Line Over Driving Table) to look up the expected grayscale value of the previous row of pixels and the expected grayscale value of the current row of pixels, and then drives the pixels to improve the charging difference caused by the panel structure. This allows the actual grayscale of the current row of pixels to reach the expected value within the same charging time, thereby solving the horizontal stripe problem. For example, the expected grayscale of the previous row is 32, and the expected grayscale of the current row is 16. Then after turning on the LOD function, the actual output data voltage of the current row obtained by looking up the table should be the voltage corresponding to grayscale 8, so that the presented grayscale can be consistent with the expected grayscale 16.

[0003] However, the LOD function also has its drawbacks and may cause vertical stripes in some cases:

[0004] For display panels with opposite polarity of pixels in adjacent columns (the polarity of the horizontal pixels switches in a pattern of +, -, +, -..., and the polarity of pixels in the same column is the same), due to the difference in the output characteristics of positive and negative polarity voltages, the negative polarity voltage in the same row is easier to reach the desired grayscale through LOD than the positive polarity voltage, ultimately presenting a vertical stripe phenomenon with higher brightness of negative polarity pixels. Summary of the Invention

[0005] The present application provides a display panel, a driving method and a display device to solve the technical problem of vertical stripes existing in the related art.

[0006] According to one embodiment of the present application, a display panel is provided, comprising a plurality of sub-pixels arranged in an array, wherein the polarities of the sub-pixels in the same column are the same, and the polarities of the sub-pixels in adjacent columns are opposite, and each row of sub-pixels is connected to two scan lines. In the same row, the positive polarity pixels are connected to the first scan line, and the negative polarity pixels are connected to the second scan line; the positive polarity turn-on voltage output to the positive polarity pixels is controlled by the first scan line, and the negative polarity turn-on voltage output to the negative polarity pixels is controlled by the second scan line, so that both the positive polarity pixels and the negative polarity pixels reach a preset grayscale value.

[0007] According to another embodiment of the present application, a driving method is provided, which is applied to the above-mentioned display panel, and the method includes: obtaining the resolution of the display panel and detecting the refresh rate of the display panel; calculating the pixel charging time according to the resolution and the refresh rate; detecting the enabled state of the row overdrive LOD function; and according to the pixel charging time and the LOD enabled state, controlling the positive turn-on voltage output by the first scan line to the positive polarity pixel, and controlling the negative turn-on voltage output by the second scan line to the negative polarity pixel, so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value.

[0008] According to another embodiment of the present application, a display device is also provided, including a display panel as described above, a panel frame, a power module and a data receiving module; the display panel is installed on the panel frame, the power supply end of the display panel is connected to the power module, and the signal receiving end of the display panel is connected to the data receiving module.

[0009] Through the embodiments of the present application, for each row of sub-pixels, two scan lines are used to respectively control the turn-on voltages of pixels of different polarities in the same row, the positive polarity pixels are controlled by one scan line, and the negative polarity pixels are controlled by another scan line, and the sub-pixels of different polarities in the same row are controlled separately. According to the difference in the output characteristics of the positive and negative polarity voltages (the negative polarity voltage is easier to reach the desired grayscale through the row overdrive LOD than the positive polarity voltage), within the same charging time, a higher positive turn-on voltage can be output to the positive polarity pixels through the first scan line, so that the positive polarity pixels can reach the desired grayscale faster, thereby compensating for the charging difference between the positive and negative polarity pixels, so that both the positive polarity pixels and the negative polarity pixels reach the preset grayscale value, avoiding the vertical stripe phenomenon, and improving the display uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0011] Figure 1 is a schematic diagram of the display panel structure of an embodiment of the present application;

[0012] Figure 2 is a schematic diagram of an exemplary structure of a display panel according to an embodiment of the present application;

[0013] Figure 3 This is a schematic diagram of the compensation circuit reversal of the scan line for frame polarity inversion according to an embodiment of the present application;

[0014] Figure 4 This is an example diagram of assigning values ​​to a routine overdrive table according to an embodiment of the present application;

[0015] Figure 5 This is a schematic diagram of the positive and negative polarity pressure difference principle of the embodiment of the present application;

[0016] Figure 6 is a flow chart of a driving method according to an embodiment of the present application;

[0017] Figure 7 A schematic structural diagram of a display device provided in an embodiment of the present application.

[0018] Reference numerals:

[0019] 100 - display panel; 700 - display device; 701 - panel frame; 702 - power module; 703 - data receiving module. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0022] First embodiment:

[0023] Reference Figure 1 An embodiment of the present invention provides a display panel, comprising: a plurality of sub-pixels arranged in an array, a plurality of scan lines (Gate lines), and a plurality of data lines (Source lines); wherein the polarities of the sub-pixels in the same column are the same, and the polarities of the sub-pixels in adjacent columns are opposite, such as Figure 1 The polarity of the sub-pixels in the same row is arranged in an alternating pattern of positive and negative. Each row of sub-pixels is connected to two scan lines. In the same row of sub-pixels, the positive polarity pixels are connected to the first scan line Gate_L, and the negative polarity pixels are connected to the second scan line Gate_R.

[0024] In this embodiment, the difference in the output characteristics of the positive and negative polarity voltages is taken into account. The negative polarity voltage of the same row is easier to reach the desired grayscale through LOD (Line-over-driving) than the positive polarity voltage. Therefore, in this embodiment, the positive polarity pixels are controlled by one scan line, and the negative polarity pixels are controlled by another scan line, that is, the positive polarity turn-on voltage output to the positive polarity pixels is controlled by the first scan line, and the negative polarity turn-on voltage output to the negative polarity pixels is controlled by the second scan line, so that the sub-pixels with the same polarity in the same row can be controlled separately. Within the same charging time, a higher positive polarity turn-on voltage can be output to the positive polarity pixels through the first scan line, so that the positive polarity pixels can reach the desired grayscale faster, thereby compensating for the charging difference between the positive and negative polarity pixels, so that both the positive polarity pixels and the negative polarity pixels reach the preset grayscale value, and avoid vertical stripes.

[0025] Optionally, the sub-pixels include a first sub-pixel, a second sub-pixel and a third sub-pixel, and the colors of the first sub-pixel, the second sub-pixel and the third sub-pixel are different; in the same row, the first sub-pixel, the second sub-pixel and the third sub-pixel are alternately arranged in sequence, and the same sub-pixel is arranged in the same column.

[0026] In one implementation of this embodiment, the first scan line and the second scan line are connected via a switch, and the switch may be a thin film transistor, a field effect transistor, or the like.

[0027] If the charging time is sufficient, both positive and negative polarity pixels in the same row have enough time to reach the desired grayscale, and vertical stripes will not appear. In this case, there is no need to distinguish the polarity of the pixel scan signals. The first scan line and the second scan line can output the same turn-on voltage. Then, the switch is closed. When the switch is closed, the first scan line and the second scan line are short-circuited. The first scan line outputs a first positive turn-on voltage to the positive polarity pixels, and the second scan line outputs a first negative turn-on voltage to the negative polarity pixels. The first positive turn-on voltage is equal to the first negative turn-on voltage.

[0028] When the charging time is insufficient, or when LOD is turned on, the charging time may still be insufficient. For example, when the refresh rate is high, for the sub-pixels in the same row, due to the difference in the output characteristics of the positive and negative polarity voltages, within the same charging time, the negative polarity voltage reaches the desired grayscale faster through overcharging, and the positive polarity voltage may not reach the desired grayscale through overcharging in a short time, and finally presents the phenomenon of bright and dark vertical stripes. At this time, it is necessary to distinguish the pixel polarity by scanning signals, then disconnect the switch. When the switch is disconnected, the first scan line outputs the second positive turn-on voltage to the positive polarity pixel, and the second scan line outputs the second negative turn-on voltage to the negative polarity pixel. The second positive turn-on voltage is greater than the second negative turn-on voltage. By outputting a higher positive turn-on voltage to the positive polarity pixel through the first scan line, the positive polarity pixel can reach the desired grayscale faster, thereby compensating for the charging difference between the positive and negative polarity pixels and solving the vertical stripe problem.

[0029] Reference Figure 2 , is a more specific embodiment of the present application. Taking the first row of pixels as an example, the first scan line (Gate1_L) and the second scan line (Gate1_R) are connected by a switch (such as Figure 2 The first transistor T1 is connected.

[0030] When the first transistor T1 is closed, the first scan line and the second scan line are short-circuited. At this time, the turn-on voltages input by Gate1_L and Gate1_R to the first row of pixels are equal; for a display panel of ordinary size and low refresh rate, the charging time is sufficient, and the difference in positive and negative polarity voltages and the opening of LOD will not cause the display difference of positive and negative polarity pixels, that is, there will be no vertical stripe problem. Therefore, there is no need to distinguish the scan signals. At this time, the first transistor T1 is closed, the first scan line and the second scan line are short-circuited, and the first scan line and the second scan line will output the same turn-on voltage.

[0031] When the first transistor T1 is off, Gate1_L and Gate1_R are isolated. The first scan line Gate1_L independently outputs a positive turn-on voltage to the positive-polarity pixels in the first row, while the second scan line Gate1_R independently outputs a negative turn-on voltage to the negative-polarity pixels in the first row. This separate control allows for optimization based on the differences in voltage output characteristics between the positive and negative polarities. For example, the slower charging rate of positive-polarity pixels can be compensated by increasing the turn-on voltage amplitude. For negative-polarity pixels, the opposite strategy can be employed, ensuring that both positive and negative pixels reach the preset grayscale value. This allows for separate control of sub-pixels of the same polarity in the same row, compensating for differences in positive and negative voltage output characteristics.

[0032] Second embodiment:

[0033] In this embodiment, a driving method is provided. The driving method is applied to the display panel described in the above embodiment. Figure 6 , Figure 6 is a flow chart of a driving method according to an embodiment of the present application, such as Figure 6 As shown, the process includes the following steps:

[0034] Step S10, obtaining the resolution of the display panel and detecting the refresh rate of the display panel;

[0035] Step S20, calculating pixel charging time according to the resolution and the refresh rate;

[0036] Step S30, detecting the activation state of the row overdrive LOD function;

[0037] In step S40, according to the pixel charging time and the LOD enabled state, the positive turn-on voltage outputted by the first scan line to the positive polarity pixel is controlled, and the negative turn-on voltage outputted by the second scan line to the negative polarity pixel is controlled, so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value.

[0038] In this embodiment, some display panels have multiple refresh rates, such as 360HZ, 240HZ, 120HZ and 60HZ. Different refresh rates correspond to different pixel charging times. Specifically, the higher the refresh rate, the shorter the pixel charging time. Figure 1 In the display architecture shown, the polarity of sub-pixels in the same row is alternating between positive and negative. Due to the differences in the output characteristics of positive and negative voltages, given the same charging time and data voltage, the negative voltage reaches the desired grayscale faster through overcharging. Therefore, the shorter the charging time, the greater the probability that the positive voltage will fail to reach the desired grayscale due to overcharging in a short period of time, making it more likely that vertical stripes between bright and dark areas will appear.

[0039] Reference Figure 5The principle of the vertical stripe phenomenon is illustrated as follows: the expected grayscale value of both positive and negative polarity pixels is 60 grayscales, the expected grayscale of the positive polarity pixel is recorded as Gray60(+), and the expected grayscale of the negative polarity pixel is recorded as Gray60(-). Vcom (common electrode voltage) is set between Gray60(+) and Gray60(-). In theory, Gray60(+) and Gray60(-) are symmetrical, and the brightness of the positive and negative polarities is consistent. Since the negative polarity pixel voltage reaches the desired grayscale through overcharging faster than the positive polarity pixel voltage, within the same, shorter charging time, the actual grayscale of the negative polarity pixel (denoted as Gray60(-)') can reach the desired grayscale Gray60(-) of the negative polarity pixel, that is, Gray60(-)' coincides with Gray60(-); while the actual grayscale of the positive polarity pixel (denoted as Gray60(+)') cannot reach the desired grayscale Gray60(+) of the positive polarity pixel, and the actual grayscale presented corresponds to the actual output data voltage, that is, the output values ​​of the positive and negative polarity actual data voltages △V(+) and △V(-) are asymmetric, resulting in an offset of the actual vcom', and ultimately showing that the data line where the negative polarity voltage is located has a higher brightness, resulting in a vertical stripe phenomenon.

[0040] Based on this, this embodiment obtains the resolution of the display panel and detects the current refresh rate of the display panel; calculates the pixel charging time based on the resolution and refresh rate, and detects the enabled state of the row overdrive LOD function. Since the LOD function adjusts the actual grayscale of the pixel through the row overdrive table LOD Table, it will increase the positive and negative polarity charging difference. For example, Figure 4 The expected grayscale of the previous row is 32, and the expected grayscale of the current row is 48. The actual grayscale of the current row is 52 according to the LOD Table. The positive and negative polarities need to be overcharged to the data voltage corresponding to grayscale 52 at the same time. However, at the same time, the negative polarity voltage reaches the expected grayscale 48 faster through overcharging, while the actual presentation result of the positive polarity pixel can only reach grayscale 40, increasing the probability of the occurrence of bright and dark vertical stripes.

[0041] This embodiment uses two rows of scan lines to respectively control the turn-on voltages of pixels of different polarities in the same row. According to the pixel charging time and the LOD enabled state, the first scan line is controlled to output a first turn-on voltage to the positive polarity pixels, and the second scan line is controlled to output a second turn-on voltage to the negative polarity pixels. The higher the TFT turn-on voltage corresponding to the scan line, the larger the TFT opening. At the same time and the same data voltage, the more charge is charged to the pixel electrode, and the better the charging effect is. This compensates for the charging difference between the positive and negative polarity pixels, so that both the positive polarity pixels and the negative polarity pixels reach the preset grayscale value, avoids the bright and dark vertical stripes phenomenon, and improves display uniformity.

[0042] Optionally, in this embodiment, calculating the pixel charging time includes: obtaining the number of pixel rows through the resolution, calculating the product of the number of pixel rows and the refresh rate, calculating the ratio of 1 to the product, and using the ratio as the pixel charging time of each row.

[0043] In one implementation of this embodiment, according to the pixel charging time and the LOD enabled state, controlling the positive turn-on voltage outputted by the first scan line to the positive polarity pixel and controlling the negative turn-on voltage outputted by the second scan line to the negative polarity pixel so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value includes:

[0044] A41, determining whether the pixel charging time is greater than or equal to a preset charging time;

[0045] A42, if the pixel charging time is greater than or equal to the preset charging time and the LOD enable state is in the off state, then the first positive turn-on voltage output by the first scan line to the positive polarity pixel is controlled, and the first negative turn-on voltage output by the second scan line to the negative polarity pixel is controlled, so that both the positive polarity pixel and the negative polarity pixel reach the preset grayscale value, and the first positive turn-on voltage is equal to the first negative turn-on voltage.

[0046] In this embodiment, the preset charging time can be set according to actual conditions. It is determined whether the pixel charging time is greater than or equal to the preset charging time. If the pixel charging time is greater than or equal to the preset charging time, it means that the charging time is sufficient. It may be a display panel of ordinary size with a low refresh rate. Within the same charging time, the pixel row at the far end also has enough time to reach the desired grayscale, and there will be no bright and dark horizontal stripes. At this time, the LOD function is not turned on, that is, the LOD enabled state is off. Moreover, within the same charging time, the positive polarity pixels in the same row also have enough time to reach the desired grayscale, and there will be no bright and dark vertical stripes. At this time, there is no need to distinguish the pixel polarity by scanning signal. The first scan line and the second scan line can output the same turn-on voltage, that is, control the first scan line to output the first positive turn-on voltage to the positive polarity pixel, and control the second scan line to output the first negative turn-on voltage to the negative polarity pixel, so that both the positive polarity pixel and the negative polarity pixel reach the preset grayscale value. Among them, the first positive turn-on voltage is equal to the first negative turn-on voltage.

[0047] Optionally, in this embodiment, reference Figure 2Taking the first row of pixels as an example, the first scan line (Gate1_L) and the second scan line (Gate1_R) are connected through the first transistor T1. When the pixel charging time is greater than or equal to the preset charging time and the LOD enable state is in the off state, it means that the charging time is sufficient and there is no need to distinguish the pixel polarity of the scan signal. At this time, only one group of signals needs to be sent, and the first transistor T1 is controlled to be closed, short-circuiting the signals of the first scan line and the second scan line, so that the first positive turn-on voltage output by the first scan line is equal to the first negative turn-on voltage output by the second scan line.

[0048] In another implementation of this embodiment, according to the pixel charging time and the LOD enabled state, controlling the positive turn-on voltage outputted by the first scan line to the positive polarity pixel and controlling the negative turn-on voltage outputted by the second scan line to the negative polarity pixel so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value includes:

[0049] B41, determining whether the pixel charging time is greater than or equal to a preset charging time;

[0050] B42, if the pixel charging time is less than the preset charging time and the LOD enable state is on, then the second positive turn-on voltage output by the first scan line to the positive polarity pixel is increased, and the second negative turn-on voltage output by the second scan line to the negative polarity pixel is maintained unchanged, so that both the positive polarity pixel and the negative polarity pixel reach the preset grayscale value.

[0051] In this embodiment, if the pixel charging time is less than the preset charging time, it indicates that the charging time is insufficient. This may be a large-size, high-refresh-rate display panel. In the same time, the near-end pixel row may reach the desired grayscale, while the far-end pixel row cannot reach the desired grayscale, resulting in light and dark horizontal stripes. In this case, the LOD function needs to be enabled to resolve the light and dark horizontal stripes problem. That is, the LOD enable state is on, and the LOD function will be accompanied by the light and dark vertical stripes during its effectiveness. For the same row of sub-pixels, due to the difference in the output characteristics of the positive and negative polarity voltages, under the same charging time and the same data voltage, the negative polarity voltage reaches the desired grayscale faster through overcharging, while the positive polarity voltage cannot reach the desired grayscale through overcharging in a short time, ultimately resulting in the light and dark vertical stripes phenomenon. In this regard, in this embodiment, when the pixel charging time is insufficient and the LOD function is turned on at the same time, the second positive turn-on voltage output by the first scan line to the positive polarity pixel is increased. The higher the TFT turn-on voltage corresponding to the first scan line, the larger the TFT opening. At the same time and the same data voltage, the more charge is charged to the positive polarity pixel, which speeds up the charging rate of the positive polarity pixel, thereby compensating for the charging difference between the positive and negative polarity pixels and the negative polarity pixels, so that both the positive polarity pixels and the negative polarity pixels reach the preset grayscale value, avoiding the phenomenon of bright and dark vertical stripes.

[0052] For sub-pixels in the same row, since the data voltage of the negative polarity sub-pixels after LOD can reach the target voltage and present the expected grayscale, the second negative polarity turn-on voltage output by the second scan line to the negative polarity pixels is maintained unchanged, that is, the second scan line only needs to transmit a conventional turn-on voltage, and both the positive polarity pixels and the negative polarity pixels reach the preset grayscale value, avoiding the abnormal vertical stripes that occur when the LOD function solves the horizontal stripe problem.

[0053] Optionally, in this embodiment, increasing the second positive turn-on voltage outputted by the first scan line to the positive polarity pixel includes:

[0054] b421, obtain the positive electrode maximum start voltage and positive electrode minimum start voltage corresponding to the current refresh rate;

[0055] b422, for each row of positive polarity pixels, calculate the grayscale difference between the expected grayscale and the LOD grayscale of each positive polarity pixel;

[0056] b423, obtain the maximum grayscale difference among all positive polarity pixel grayscale differences;

[0057] b424, calculate the positive electrode turn-on voltage of the current row according to the maximum grayscale difference, the highest positive electrode turn-on voltage, the lowest positive electrode turn-on voltage, and the limited grayscale difference, as the increased second positive electrode turn-on voltage output by the first scan line to the positive polarity pixels.

[0058] In this embodiment, the LOD grayscales of each positive polarity pixel also vary. The LOD grayscale is the actual grayscale value obtained after the LOD function. The greater the grayscale difference between the desired grayscale and the LOD grayscale, the worse the display effect of the corresponding sub-pixel. Therefore, this embodiment selects the positive polarity pixel with the largest grayscale difference among all positive polarity pixels in a row as the standard for processing. Ensuring the charging effect of the sub-pixel with the largest grayscale difference can guarantee the charging effect of the sub-pixels in the entire row.

[0059] Since the higher the refresh rate, the shorter the charging time, the worse the charging effect of positive polarity pixels, and the greater the charging difference between adjacent columns of pixels, the required turn-on voltage is higher. Therefore, this embodiment increases the turn-on voltage of the positive polarity scan line. However, the voltage cannot be increased indefinitely, which will result in a larger positive and negative voltage difference between the scan lines, increased current, increased power consumption, and severe heat generation. Based on this, this embodiment is shown in Table 1 below. For different refresh rates, the maximum positive turn-on voltage of the scan signal for positive polarity pixels is pre-set. Specifically, the higher the refresh rate, the shorter the corresponding charging time, and therefore the required scan gate turn-on voltage is higher. For example, in Table 1 below, the refresh rate is 60 Hz. This low refresh rate means that the charging time is long, and the charging requirements of both positive and negative polarity pixels can basically be met. The corresponding gate turn-on voltage for both positive and negative polarity is a conventional value of 34 V. The refresh rate is 120 Hz, and the maximum gate turn-on voltage for positive polarity is 36 V. The refresh rate is 240 Hz, and the maximum gate turn-on voltage for positive polarity is 38 V. The refresh rate is 360 Hz, and the maximum gate turn-on voltage for positive polarity is 40 V. When the refresh rate is 60 Hz, the charging time is sufficient, and the charging requirements of both positive and negative polarity pixels can basically be met. There is no need to distinguish the scanning signals for pixel polarity. In this case, a single gate drive is used, and the two scanning signals output the same turn-on voltage (conventional value). When the refresh rate is 120HZ or above, due to the short charging time, it is necessary to distinguish the scanning signals of positive and negative pixel polarities. At this time, dual Gate drive is adopted, that is, different turn-on voltages are output through the first scan line and the second scan line. Within the same charging time, a higher positive turn-on voltage can be output to the positive polarity pixels through the first scan line, so that the positive polarity pixels can reach the desired gray scale faster, so as to avoid the vertical stripe problem caused by the negative polarity voltage being easier to reach the desired gray scale through LOD than the positive polarity voltage.

[0060] Table 1:

[0061]

[0062] There is a grayscale difference limit between the desired grayscale of a pixel and the LOD grayscale. Normally, the grayscale difference between the desired grayscale of a pixel and the LOD grayscale will not exceed 60 grayscales. Therefore, in one example, the grayscale difference limit is set to 60 grayscales. To control the grayscale difference between the desired grayscale and the LOD grayscale of the positive polarity pixel to be within the grayscale difference limit, the voltage applied to the positive polarity pixel can be calculated using the following formula: V` = ((V1-V2) / G1)*G2+V2, where V` is the positive electrode turn-on voltage of the current row, V1 is the highest positive electrode turn-on voltage, V2 is the lowest positive electrode turn-on voltage, G1 is the grayscale difference limit, and G2 is the maximum grayscale difference.

[0063] Assuming the highest positive electrode turn-on voltage is 40V and the lowest positive electrode turn-on voltage is set to 38V, the grayscale difference from 0 to 60 gray varies between 38V and 40V. For example, according to Table 2 below, (m, n) represents the coordinates of rows and columns. The maximum grayscale difference in the first row is 15 grayscales (R35 to R50). Then, according to the above formula, the second positive electrode turn-on voltage loaded on the first row is ((40-38) / 60)*15+38=38.5V. Therefore, the voltage loaded on the positive gate of this row is 38.5V. The same applies to the second to nth rows in Table 2, and is not repeated here.

[0064] Table 2:

[0065]

[0066] In another implementation of the present embodiment, according to the pixel charging time and the LOD enabling state, the positive turn-on voltage output by the first scan line to the positive polarity pixel is controlled, and the negative turn-on voltage output by the second scan line to the negative polarity pixel is controlled, so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value, including: in the current frame, according to the pixel charging time and the LOD enabling state, the positive turn-on voltage output by the first scan line to the positive polarity pixel is controlled, and the negative turn-on voltage output by the second scan line to the negative polarity pixel is controlled, so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value; in the next frame of the current frame, according to the pixel charging time and the LOD enabling state, the negative turn-on voltage output by the first scan line to the positive polarity pixel is controlled, and the positive turn-on voltage output by the second scan line to the negative polarity pixel is controlled, so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value.

[0067] like Figure 3 As shown, since the scanning signals of the positive and negative polarity pixels are output by two different scanning lines respectively, when the pixel polarity of the display panel is reversed once within a frame, the pixel point will experience a transition from positive polarity to negative polarity (or from negative polarity to positive polarity). In order to ensure that the corresponding voltage is accurately output to the positive and negative polarity pixels, the compensation method of the scanning line is also adjusted accordingly. Specifically, this adjustment is manifested as the compensation methods of the scanning lines between two adjacent frames are swapped.

[0068] The interchange mechanism of this embodiment helps to balance the heating of the scan lines, and prevents the scan lines on one side from overheating or accelerating aging due to continuous high voltage.

[0069] In another implementation of this embodiment, controlling the positive turn-on voltage output by the first scan line to the positive polarity pixels according to the pixel charging time and the LOD enabling state includes: determining a first pixel row and a second pixel row, the first pixel row being several pixel rows in the display panel far away from the power supply, and the second pixel row being several pixel rows in the display panel close to the power supply; increasing the reference turn-on voltage of the first pixel row, and for the first pixel row, based on the increased reference turn-on voltage, controlling the first scan line to output a third positive turn-on voltage to the positive polarity pixels according to the pixel charging time and the LOD enabling state; reducing the reference turn-on voltage of the second pixel row, and for the second pixel row, based on the reduced reference turn-on voltage, controlling the first scan line to output a fourth positive turn-on voltage to the positive polarity pixels according to the pixel charging time and the LOD enabling state, the third positive turn-on voltage being greater than the fourth positive turn-on voltage.

[0070] In large-size display panels, distant pixel rows face charging degradation due to their long distance from the power supply, while nearby pixel rows enjoy excellent charging. This unevenness impacts the overall display quality of the panel. To address this, this embodiment raises the scan line's turn-on voltage reference for the first distant pixel row to enhance the charging capability of these pixels and compensate for the degradation caused by the long power supply path. For the second nearby pixel row, the scan line's turn-on voltage reference is appropriately lowered to prevent overcharging. This ensures display consistency while effectively reducing power consumption, addressing the uneven pixel charging caused by the disparity in power supply paths between the far and near ends of the panel.

[0071] This embodiment adopts a dual-scan line architecture, which can flexibly adjust the scanning strategy according to different refresh rates, panel sizes and other conditions. By analyzing the pixel charging time and the enabled status of the LOD function, it classifies and compensates for the uneven charging of positive and negative polarities, ensuring that the positive and negative polarity charging of each row is more uniform without adding too many additional circuit structures. The implementation plan is relatively simple and easy to integrate and apply in existing display systems.

[0072] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a TV, or a computer, etc.) to execute the methods described in each embodiment of the present application.

[0073] Third embodiment:

[0074] Figure 7 A schematic diagram of the structure of a display device 700 provided in an embodiment of the present application is shown in FIG. Figure 7 As shown, the display device 700 includes:

[0075] The display panel 100 , the panel frame 701 , the power module 702 and the data receiving module 703 .

[0076] The display panel 100 may be Figure 1 The display panel 100 is shown.

[0077] The display panel 100 is mounted on the panel frame 701 . The power supply end of the display panel 100 is connected to the power module 702 . The signal receiving end of the display panel 100 is connected to the data receiving module 703 .

[0078] The power module 702 can provide the display panel 100 with the power required for operation. The data receiving module 703 can receive input data, and the display panel 100 drives corresponding pixels to display corresponding colors according to the received data.

[0079] The display device provided in the embodiment of the present application, by applying the above-mentioned display panel, uses two scan lines to connect the positive polarity pixels and the negative polarity pixels for each row of sub-pixels, respectively. Within the same charging time, a higher positive polarity turn-on voltage can be output to the positive polarity pixels through the first scan line, so that the positive polarity pixels can reach the desired grayscale faster, thereby compensating for the charging difference between the positive and negative polarity pixels, so that both the positive polarity pixels and the negative polarity pixels reach the preset grayscale value, avoiding the vertical stripe phenomenon.

[0080] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0081] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0082] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0083] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a computer storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned computer storage medium includes: various media that can store program codes, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0084] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A display panel comprising a plurality of sub-pixels arranged in an array, wherein: The polarity of sub-pixels in the same column is the same, while the polarity of sub-pixels in adjacent columns is opposite. Each row of sub-pixels is connected to two scan lines. In the same row, positive polarity pixels are connected to the first scan line, and negative polarity pixels are connected to the second scan line. The positive turn-on voltage output to the positive polarity pixel is controlled by the first scan line, and the negative turn-on voltage output to the negative polarity pixel is controlled by the second scan line, so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value; The first scan line and the second scan line are connected via a switch; When the switch is closed, the first scan line and the second scan line are short-circuited, the first scan line outputs a first positive turn-on voltage to the positive polarity pixels, and the second scan line outputs a first negative turn-on voltage to the negative polarity pixels, and the first positive turn-on voltage is equal to the first negative turn-on voltage; When the switch is disconnected, the first scan line outputs a second positive turn-on voltage to the positive polarity pixel, and the second scan line outputs a second negative turn-on voltage to the negative polarity pixel, and the second positive turn-on voltage is greater than the second negative turn-on voltage; wherein, if the pixel charging time is less than the preset charging time and the LOD enabling state is on, the switch is closed, the second positive turn-on voltage output by the first scan line to the positive polarity pixel is increased, and the second negative turn-on voltage output by the second scan line to the negative polarity pixel is maintained unchanged, so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value; Increasing the second positive polarity turn-on voltage outputted by the first scan line to the positive polarity pixel includes: Obtain the highest positive turn-on voltage and the lowest positive turn-on voltage corresponding to the current refresh rate; for each row of positive polarity pixels, calculate the grayscale difference between the expected grayscale and the LOD grayscale of each positive polarity pixel; obtain the maximum grayscale difference among all positive polarity pixel grayscale differences; calculate the positive polarity turn-on voltage of the current row based on the maximum grayscale difference, the highest positive polarity turn-on voltage, the lowest positive polarity turn-on voltage, and the limited grayscale difference, as the second positive polarity turn-on voltage output by the increased first scan line to the positive polarity pixels.

2. A driving method, applied to the display panel according to claim 1, characterized in that: The method comprises: Obtaining the resolution of the display panel and detecting the refresh rate of the display panel; calculating a pixel charging time based on the resolution and the refresh rate; Detect the enabled state of the row overdrive LOD function; According to the pixel charging time and the LOD enabled state, controlling the positive turn-on voltage outputted by the first scan line to the positive polarity pixels and controlling the negative turn-on voltage outputted by the second scan line to the negative polarity pixels, so that both the positive polarity pixels and the negative polarity pixels reach a preset grayscale value; According to the pixel charging time and the LOD enabled state, controlling the positive turn-on voltage outputted by the first scan line to the positive polarity pixel and controlling the negative turn-on voltage outputted by the second scan line to the negative polarity pixel so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value includes: Determining whether the pixel charging time is greater than or equal to a preset charging time; If the pixel charging time is less than the preset charging time and the LOD enabled state is on, the second positive turn-on voltage output by the first scan line to the positive polarity pixel is increased, and the second negative turn-on voltage output by the second scan line to the negative polarity pixel is maintained unchanged, so that both the positive polarity pixel and the negative polarity pixel reach the preset grayscale value; Increasing the second positive polarity turn-on voltage outputted by the first scan line to the positive polarity pixel includes: Get the highest positive turn-on voltage and the lowest positive turn-on voltage corresponding to the current refresh rate; For each row of positive polarity pixels, calculate the grayscale difference between the expected grayscale and the LOD grayscale of each positive polarity pixel; Obtain the maximum grayscale difference among all positive polarity pixel grayscale differences; The positive turn-on voltage of the current row is calculated according to the maximum grayscale difference, the positive highest turn-on voltage, the positive lowest turn-on voltage and the limited grayscale difference as the increased second positive turn-on voltage outputted by the first scan line to the positive polarity pixels.

3. The method according to claim 2, characterized in that According to the pixel charging time and the LOD enabled state, controlling the positive turn-on voltage outputted by the first scan line to the positive polarity pixel and controlling the negative turn-on voltage outputted by the second scan line to the negative polarity pixel so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value includes: Determining whether the pixel charging time is greater than or equal to a preset charging time; If the pixel charging time is greater than or equal to the preset charging time and the LOD enable state is in the off state, the first scan line is controlled to output the first positive pole start-up voltage to the positive polarity pixel, and the second scan line is controlled to output the first negative pole start-up voltage to the negative polarity pixel, so that both the positive polarity pixel and the negative polarity pixel reach the preset grayscale value, and the first positive pole start-up voltage is equal to the first negative pole start-up voltage.

4. The method according to claim 2, characterized in that According to the pixel charging time and the LOD enabled state, controlling the positive turn-on voltage outputted by the first scan line to the positive polarity pixel and controlling the negative turn-on voltage outputted by the second scan line to the negative polarity pixel so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value includes: In the current frame, according to the pixel charging time and the LOD enabled state, the first scan line is controlled to output a positive turn-on voltage to the positive polarity pixel, and the second scan line is controlled to output a negative turn-on voltage to the negative polarity pixel, so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value; In the next frame of the current frame, according to the pixel charging time and the LOD enabled state, the first scan line is controlled to output a negative turn-on voltage to the positive polarity pixel, and the second scan line is controlled to output a positive turn-on voltage to the negative polarity pixel, so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value.

5. The method according to claim 2, characterized in that According to the pixel charging time and the LOD enabled state, controlling the positive electrode start voltage outputted by the first scan line to the positive polarity pixel includes: Determine a first pixel row and a second pixel row, wherein the first pixel row is a plurality of pixel rows in the display panel that are far from a power supply, and the second pixel row is a plurality of pixel rows in the display panel that are close to the power supply; Increasing the reference turn-on voltage of the first pixel row, and for the first pixel row, controlling the third positive turn-on voltage outputted by the first scan line to the positive polarity pixels based on the increased reference turn-on voltage and the pixel charging time and the LOD enabled state; Lower the reference turn-on voltage of the second pixel row. For the second pixel row, based on the lowered reference turn-on voltage, according to the pixel charging time and the LOD enabled state, control the fourth positive turn-on voltage output by the first scan line to the positive polarity pixel, and the third positive turn-on voltage is greater than the fourth positive turn-on voltage.

6. The method according to claim 2, characterized in that Calculating the pixel charging time according to the resolution and the refresh rate includes: Obtaining the number of pixel rows according to the resolution; The product of the number of pixel rows and the refresh rate is calculated, a ratio of 1 to the product is calculated, and the ratio is used as the pixel charging time of each row of pixels.

7. A display device, characterized in that: The display device comprises a panel frame, a power module, a data receiving module and the display panel according to claim 1; The display panel is mounted on the panel frame, a power supply end of the display panel is connected to the power module, and a signal receiving end of the display panel is connected to the data receiving module.

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