Display panel, driving method and display device

Abstract

The invention discloses a display panel, a driving method and a display device.The display panel comprises a plurality of sub-pixels arranged in an array, the polarities of the sub-pixels in the same column are the same, the polarities of the sub-pixels in the adjacent columns are opposite, the sub-pixels in each row are connected with two scanning lines, in the same row, the positive polarity pixel is connected with the first scanning line, and in the same row, the negative polarity pixel is connected with the second scanning line. The negative polarity pixel is connected with the second scanning line; and controlling a positive turn-on voltage output to the positive pixel through the first scanning line, and controlling a negative turn-on voltage output to the negative pixel through the second scanning line, so that both the positive pixel and the negative pixel reach a preset gray-scale value. The two rows of scanning lines are adopted to control the turn-on voltages of the pixels with different polarities in the same row respectively, the charging difference of the pixels with the positive and negative polarities is compensated, the pixels with the positive and negative polarities both reach the preset gray-scale value, the bright and dark vertical stripe phenomenon is avoided, and the display uniformity is improved.

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 more and more popular with users due to the smooth experience brought by their high refresh rate. At the same time, more and more users in the home field are choosing larger display products. Larger size means higher resolution. Therefore, current display products are developing towards higher resolution and higher refresh rate. The high-resolution and high-refresh rate display panels have a shorter charging time. Coupled with the difference in wiring resistance between different rows, within the same charging time, the near-end (close to the power supply) pixel row is more likely to reach the expected grayscale, while the far-end (far away from the power supply) pixel row sometimes cannot reach the expected grayscale, and finally presents the phenomenon of light and dark horizontal stripes. In this regard, the relevant technology generally uses the LOD (Line-over-driving) function to compensate to solve the problem of horizontal horizontal stripes. The LOD function is based on the expected grayscale value of the previous row of pixels and the expected grayscale value of the current row of pixels. By looking up the LOD Table (Line Over Driving Table, row over driving table) to improve the charging difference caused by the panel structure, the actual grayscale of the current row of pixels can reach the expected value within the same charging time to solve the problem of horizontal horizontal stripes. For example, the expected grayscale of the previous row is 32, and the expected grayscale of the current row is 16. After the LOD function is turned on, 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 in some cases it can cause vertical streaks:

[0004] For display panels with opposite polarities of pixels in adjacent columns (the polarities of horizontal pixels switch 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 in which the negative polarity pixels have higher brightness. 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, the polarities of the sub-pixels in adjacent columns are opposite, each row of sub-pixels is connected to two scan lines, and 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 start-up voltage output to the positive polarity pixels is controlled by the first scan line, and the negative polarity start-up 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; 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, as well as a panel frame, a power supply 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 supply 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, and 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 gray scale 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 gray scale 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 gray scale 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 structure of a display panel according to 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 It is a schematic diagram of the compensation circuit reversal of the scan line for frame polarity inversion in 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 It 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 diagram of the structure 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 the field without creative work should fall within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[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 sequence. 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, the 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 polarities of the sub-pixels in the same row are arranged alternately in positive and negative directions. Each row of sub-pixels is connected to two scan lines, and 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 output characteristics of positive and negative polarity voltages is taken into consideration. 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 start-up voltage output to the positive polarity pixels is controlled by the first scan line, and the negative polarity start-up 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 start-up 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 the vertical stripe phenomenon is avoided.

[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, the positive polarity pixels and negative polarity pixels in the same row have enough time to reach the desired grayscale, and vertical stripes will not appear. At this time, there is no need to distinguish the polarity of the pixel scan signal, and the first scan line and the second scan line can output the same start voltage, then close the switch, when the switch is closed, the first scan line and the second scan line are short-circuited, the first scan line outputs the first positive start voltage to the positive polarity pixel, and the second scan line outputs the first negative start voltage to the negative polarity pixel, and the first positive start voltage is equal to the first negative start voltage;

[0028] When the charging time is insufficient, or when LOD is turned on, there may still be insufficient charging time. For example, when the refresh rate is high, for the same row of sub-pixels, 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 light and dark vertical stripes. At this time, it is necessary to distinguish the pixel polarity scanning signal, then disconnect the switch. When the switch is disconnected, the first scanning line outputs the second positive polarity start-up voltage to the positive polarity pixel, and the second scanning line outputs the second negative polarity start-up voltage to the negative polarity pixel. The second positive polarity start-up voltage is greater than the second negative polarity start-up voltage. By outputting a higher positive polarity start-up voltage to the positive polarity pixel through the first scanning 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, a switch (such as Figure 2 The first transistor T1 is connected.

[0030] When the first transistor T1 is closed, the first scan line is short-circuited with the second scan line. 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 turning on of LOD will not cause display differences between 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 is short-circuited with the second scan line, and the first scan line and the second scan line will output the same turn-on voltage.

[0031] When the first transistor T1 is disconnected, Gate1_L and Gate1_R are isolated, and the first scan line Gate1_L independently outputs a positive turn-on voltage to the positive polarity pixels in the first row, and the second scan line Gate1_R independently outputs a negative turn-on voltage to the negative polarity pixels in the first row. In this way, different turn-on voltages are provided for optimization according to the difference in voltage output characteristics of the positive and negative polarities through separate control. For example, for positive polarity pixels, the charging rate is slow, which can be compensated by increasing the amplitude of the turn-on voltage; for negative polarity pixels, the opposite strategy can be adopted to ensure that both positive and negative polarity pixels can reach the preset grayscale value, so as to realize separate control of sub-pixels with the same polarity in the same row and compensate for the difference in positive and negative polarity 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 enabling state of the row overdrive LOD function;

[0037] Step S40, according to the pixel charging time and LOD enabled state, controls the positive start voltage output by the first scan line to the positive polarity pixel, and controls the negative start 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.

[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 For the display architecture shown, the polarity of the sub-pixels in the same row is arranged in a positive and negative alternating pattern. Due to the difference in the output characteristics of the positive and negative polarity voltages, at the same charging time and with the same data voltage, the negative polarity voltage reaches the desired grayscale faster through overcharging. The shorter the charging time, the greater the probability that the positive polarity voltage cannot reach the desired grayscale through overcharging in a short time, and the more likely it is to present the phenomenon of light and dark vertical stripes.

[0039] Reference Figure 5The principle of the vertical stripe phenomenon is illustrated as follows: the expected grayscale values ​​of both positive and negative polarity pixels are 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 gray scale faster through overcharging than the positive polarity pixel voltage, within the same, shorter charging time, the actual gray scale of the negative polarity pixel (denoted as Gray60(-)') can reach the desired gray scale Gray60(-) of the negative polarity pixel, that is, Gray60(-)' coincides with Gray60(-); while the actual gray scale of the positive polarity pixel (denoted as Gray60(+)') cannot reach the desired gray scale Gray60(+) of the positive polarity pixel, and the actual gray scale 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 refresh rate of the current display panel; calculates the pixel charging time according to the resolution and refresh rate, and detects the enabling 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 through the LOD Table. The positive and negative polarities need to be overcharged to the data voltage corresponding to the 52 grayscale 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 40 grayscale, which increases 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 pixel, and the second scan line is controlled to output a second turn-on voltage to the negative polarity pixel. 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, 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 phenomenon of bright and dark vertical stripes, and improving 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 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 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 enabled 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 the actual situation. It is judged 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, and it may be a display panel of ordinary size and low refresh rate. In 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 closed. Moreover, in 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 scanning signal. The first scan line and the second scan line can output the same start-up voltage, that is, the first positive start-up voltage output by the first scan line to the positive polarity pixel is controlled, and the first negative start-up 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. Among them, the first positive start-up voltage is equal to the first negative start-up 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 enabling state is in the off state, it means that the charging time is sufficient and there is no need to distinguish the pixel polarity by the scanning signal. At this time, only one group of signals needs to be sent, and the first transistor T1 is controlled to be closed, and the signals of the first scan line and the second scan line are short-circuited, 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 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 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 enabled 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. It 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, and the light and dark horizontal stripes phenomenon may occur. At this time, the LOD function needs to be turned on to solve the light and dark horizontal stripes problem, that is, the LOD enable state is turned on, and the LOD function will be accompanied by the light and dark vertical stripes during the effectiveness process. 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, and the positive polarity voltage cannot reach the desired grayscale through overcharging in a short time, and finally presents 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, thereby accelerating 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 light 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 phenomenon of vertical stripes that occurs when the LOD function solves the horizontal stripe problem.

[0053] Optionally, in this implementation, increasing the second positive polarity start-up voltage output by the first scan line to the positive polarity pixel includes:

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

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

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

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

[0058] In this embodiment, the LOD grayscale of each positive polarity pixel is different. The LOD grayscale is the actual grayscale value obtained after the LOD function. The greater the grayscale difference between the expected 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, and thus ensuring 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 the positive polarity pixels, and the greater the charging difference effect of the adjacent column pixels, the larger the required turn-on voltage is. Therefore, this embodiment increases the turn-on voltage of the scan line where the positive polarity is located, but the voltage cannot be increased infinitely, which will cause the positive and negative voltage difference of the scan line to become larger, the current to increase, the power consumption to increase, and the heat to be serious. Based on this, this embodiment is as shown in Table 1 below. For different refresh rates, the highest positive turn-on voltage of the scan signal for the positive polarity pixel is pre-set. Specifically, the higher the refresh rate, the shorter the corresponding charging time, and therefore the larger the required scan gate turn-on voltage. For example, in Table 1 below, the refresh rate is 60HZ, which is a low refresh rate, indicating that the charging time is long, and the charging of positive and negative polarity pixels can basically be satisfied, and the corresponding positive and negative polarity Gate opening voltages are the normal value of 34V; the refresh rate is 120HZ, and the maximum Gate opening voltage for positive polarity is 36V; the refresh rate is 240HZ, and the maximum Gate opening voltage for positive polarity is 38V; the refresh rate is 360HZ, and the maximum Gate opening voltage for positive polarity is 40V. When the refresh rate is 60HZ, since the charging time is sufficient, the charging of positive and negative polarity pixels can basically be satisfied, and there is no need to distinguish the pixel polarity by scanning signals. At this time, a single Gate drive is used, that is, the two scanning signals output the same opening voltage (normal value). When the refresh rate is 120HZ or above, due to the short charging time, it is necessary to distinguish the scanning signals of the positive and negative pixel polarities. At this time, dual Gate driving 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 limited grayscale difference between the expected grayscale of the pixel and the LOD grayscale. Normally, the grayscale difference between the expected grayscale of the pixel and the LOD grayscale will not exceed 60 grayscales. Therefore, in one example, the limited grayscale difference is set to 60 grayscales. In order to control the grayscale difference between the expected grayscale and the LOD grayscale of the positive polarity pixel to be within the limited grayscale difference, the voltage loaded on the positive polarity pixel can be calculated by 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 limited grayscale difference, and G2 is the maximum grayscale difference.

[0063] Assuming that the highest positive turn-on voltage is 40V and the lowest positive turn-on voltage is set to 38V, the grayscale difference from 0 to 60 gray varies between 38V and 40V. For example, according to the following Table 2, (m, n) represents the coordinates of rows and columns, and the maximum grayscale difference in the first row is 15 grayscales (R35 to R50). Then, according to the above formula, the second positive turn-on voltage loaded on the first row is ((40-38) / 60)*15+38=38.5V, so the voltage loaded on the gate positive polarity of this row is 38.5V, and the second row to the nth row in Table 2 are analogous, and are not described 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 start-up voltage output by the first scan line to the positive polarity pixel is controlled, and the negative start-up 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 start-up voltage output by the first scan line to the positive polarity pixel is controlled, and the negative start-up 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 start-up voltage output by the first scan line to the positive polarity pixel is controlled, and the positive start-up 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 in that 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 avoids the problem of overheating or accelerated aging of the scan lines on one side due to continuous high voltage.

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

[0070] In a large-size display panel, the remote pixel row faces the problem of charging effect attenuation due to the long distance from the power supply path, while the near pixel row has a good charging effect. This unevenness affects the overall display effect of the panel. In this regard, this embodiment increases the start-up voltage reference of the scan line for the first pixel row at the remote end to enhance the charging ability of the remote pixels and compensate for the attenuation effect caused by the long path; for the second pixel row at the near end, the start-up voltage reference of the scan line is appropriately reduced to avoid overcharging, which not only ensures the consistency of the display effect, but also effectively reduces power consumption, solving the problem of uneven pixel charging caused by the difference in the remote and near paths 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 polarities of each row are charged more evenly 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 a necessary general hardware platform, and of course 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, a disk, or an optical disk), and includes a number of instructions for 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 , a power supply end of the display panel 100 is connected to the power module 702 , and a 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 the corresponding pixels to display the 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, adopts two scan lines to respectively connect the positive polarity pixels and the negative polarity pixels for each row of sub-pixels. 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 gray scale 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 gray scale value, and avoid the vertical stripe phenomenon.

[0080] In the above embodiments of the present application, the description of each embodiment has its own emphasis. 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. There may be other division methods in actual implementation. For example, 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, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of 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 to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned computer storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or CD-ROM and other media that can store program codes.

[0084] The above is only a preferred implementation 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 polarities of sub-pixels in the same column are the same, and the polarities of sub-pixels in adjacent columns are opposite, and it is characterized in that each row of sub-pixels is connected to two scan lines, and 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 start-up voltage output to the positive polarity pixel is controlled by the first scan line, and the negative start-up 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.

2. The display panel according to claim 1, characterized in that: The first scanning line and the second scanning 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 pixel, and the second scan line outputs a first negative turn-on voltage to the negative polarity pixel, and the first positive turn-on voltage is equal to the first negative turn-on voltage; When the switch is opened and closed, 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.

3. A driving method, applied to the display panel according to any one of claims 1 to 2, characterized in that: The method comprises: Obtaining a resolution of a display panel and detecting a refresh rate of the display panel; Calculating a pixel charging time according to 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, the first scan line is controlled to output a positive start voltage to the positive polarity pixel, and the second scan line is controlled to output a negative start voltage to the negative polarity pixel, so that both the positive polarity pixel and the negative polarity pixel reach a preset grayscale value.

4. The method according to claim 3, characterized in that According to the pixel charging time and the LOD enabled state, controlling the positive start voltage outputted by the first scan line to the positive polarity pixel, and controlling the negative start 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 turn-on voltage to the positive polarity pixel, and the second scan line is controlled 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, and the first positive turn-on voltage is equal to the first negative turn-on voltage.

5. The method according to claim 3, characterized in that: According to the pixel charging time and the LOD enabled state, controlling the positive start voltage outputted by the first scan line to the positive polarity pixel, and controlling the negative start 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 enable 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.

6. The method according to claim 5, characterized in that Increasing the second positive electrode start-up voltage outputted by the first scan line to the positive polarity pixel comprises: Get the highest positive start voltage and the lowest positive start voltage corresponding to the current refresh rate; For each row of positive polarity pixels, the grayscale difference between the expected grayscale of each positive polarity pixel and the LOD grayscale is calculated; Obtain the maximum grayscale difference among all positive polarity pixel grayscale differences; According to the maximum grayscale difference, the highest positive turn-on voltage, the lowest positive turn-on voltage and the limited grayscale difference, the positive turn-on voltage of the current row is calculated as the increased second positive turn-on voltage outputted by the first scanning line to the positive polarity pixels.

7. The method according to claim 3, characterized in that According to the pixel charging time and the LOD enabled state, controlling the positive start voltage outputted by the first scan line to the positive polarity pixel, and controlling the negative start 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.

8. The method according to claim 3, 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 start voltage of the first pixel row, and for the first pixel row, based on the increased reference start voltage, according to the pixel charging time and the LOD enabled state, controlling the third positive start voltage output by the first scan line to the positive polarity pixel; The reference turn-on voltage of the second pixel row is reduced. For the second pixel row, based on the reduced reference turn-on voltage, according to the pixel charging time and the LOD enabling state, the fourth positive turn-on voltage output by the first scan line to the positive polarity pixel is controlled, and the third positive turn-on voltage is greater than the fourth positive turn-on voltage.

9. The method according to claim 3, 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, the ratio of 1 to the product is calculated, and the ratio is used as the pixel charging time of each row of pixels.

10. 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 any one of claims 1 to 2; 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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