Brightness compensation method and display device

Abstract

The application provides a brightness compensation method and a display device. The brightness compensation method comprises the following steps: acquiring a position parameter of a to-be-compensated sub-pixel of a liquid crystal display panel; acquiring a target compensation feed-in voltage of the to-be-compensated sub-pixel based on the position parameter; acquiring an initial data voltage of the to-be-compensated sub-pixel based on to-be-displayed data of the liquid crystal display panel and the position parameter; calculating a target data voltage of the to-be-compensated sub-pixel according to the target compensation feed-in voltage and the initial data voltage; and compensating the liquid crystal display panel according to the target data voltage, so that a difference between the target data voltage of any to-be-compensated sub-pixel and a common voltage of the liquid crystal display panel tends to be equal, the brightness of the to-be-compensated sub-pixel affected by different feed-in voltages tends to be the same, and the occurrence of a shaking head phenomenon of the liquid crystal display panel is reduced.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a brightness compensation method and a display device. Background Technology

[0002] There are many factors that cause uneven brightness (mura) in the display screen of an LCD panel, such as: differences in the length of the connection between each sub-pixel and the data lines and scan lines in the LCD panel, differences in the charging time between each sub-pixel, and differences in the feed-through voltage (Vft) between each sub-pixel. These factors can make it easier for users to detect obvious bright and dark lines in the display screen when the LCD panel displays dynamic images or when the human eye moves at a certain frequency. This is the so-called "shaking line" phenomenon, which reduces the user experience.

[0003] To address this issue, related technologies have proposed solutions such as improving pixel design to reduce the difference in length and short arms between sub-pixels and reducing the feed voltage between sub-pixels through capacitor compensation. However, while new LCD panel products can improve the in-plane pixel design, existing LCD panel products cannot. Furthermore, capacitor compensation is more difficult to implement for small-sized or high-resolution LCD panels.

[0004] Therefore, it is necessary to propose a new solution to the problem of swivel marks on LCD panels. Summary of the Invention

[0005] This application provides a brightness compensation method and a display device, aiming to offer a new solution to the problem of head-shaking patterns on liquid crystal display panels.

[0006] Firstly, this application provides a brightness compensation method, including:

[0007] Obtain the position parameters of the sub-pixels to be compensated on the liquid crystal display panel;

[0008] The target compensation feed voltage of the sub-pixel to be compensated is obtained based on the position parameters;

[0009] The initial data voltage of the sub-pixel to be compensated is obtained based on the data to be displayed on the liquid crystal display panel and the position parameters.

[0010] The target data voltage of the sub-pixel to be compensated is calculated based on the target compensation feed voltage and the initial data voltage.

[0011] The brightness of the liquid crystal display panel is compensated based on the target data voltage.

[0012] In the brightness compensation method provided in this application, the step of obtaining the target compensation feed voltage of the sub-pixel to be compensated based on the position parameters includes:

[0013] Obtain the target category parameter corresponding to the liquid crystal display panel from a plurality of pre-set category parameters;

[0014] The target compensation feed voltage is obtained based on the target category parameter and the position parameter.

[0015] In the brightness compensation method provided in this application, the step of obtaining the target compensation feed voltage based on the target category parameter and the position parameter includes:

[0016] The target compensation feed voltage is obtained from a plurality of pre-set compensation feed voltages based on the target category parameter and the position parameter, wherein the compensation feed voltage corresponds one-to-one with the category parameter and the position parameter.

[0017] In the brightness compensation method provided in this application, the step of obtaining the target compensation feed voltage based on the target category parameter and the position parameter includes:

[0018] The target feed voltage type of the sub-pixel to be compensated is obtained from a plurality of pre-set feed voltage types based on the target category parameter and the position parameter, wherein the feed voltage type corresponds one-to-one with the category parameter and the position parameter;

[0019] The target compensation feed voltage is obtained based on the target feed voltage type and the target category parameter.

[0020] In the brightness compensation method provided in this application, the step of obtaining the target compensation feed voltage based on the target feed voltage type and the target category parameter includes:

[0021] The target initial feed voltage of the sub-pixel to be compensated is obtained from a plurality of pre-set initial feed voltages based on the target feed voltage type.

[0022] The feed standard voltage of the liquid crystal display panel is obtained based on the target category parameters;

[0023] The difference between the calculated target initial feed voltage and the standard feed voltage is assigned as the target compensation feed voltage.

[0024] In the brightness compensation method provided in this application, the step of obtaining the feed standard voltage of the liquid crystal display panel based on the target category parameter includes:

[0025] A first feed voltage type is obtained from a plurality of feed voltage types based on the target category parameter;

[0026] A first initial feed voltage is obtained from a plurality of said initial feed voltages based on the first feed voltage type;

[0027] The feed standard voltage is calculated based on the number of the first feed voltage types and the first initial feed voltage.

[0028] In the brightness compensation method provided in this application, before the step of obtaining the target initial feed voltage of the sub-pixel to be compensated from a plurality of preset initial feed voltages based on the target feed voltage type, the brightness compensation method further includes:

[0029] Multiple test sub-pixels in the test area of ​​the liquid crystal display panel are detected and the feed test voltage is obtained, wherein any two test sub-pixels have the same frame polarity and any two test sub-pixels have the same feed voltage type.

[0030] The feed test voltage corresponding to one of the feed voltage types is assigned the value of the initial feed voltage corresponding to the same feed voltage type.

[0031] In the brightness compensation method provided in this application, the step of calculating the target data voltage based on the target compensation feed voltage and the initial data voltage includes:

[0032] The target data voltage is calculated based on a first preset relationship, the target compensation feed voltage, and the initial data voltage. The first preset relationship is:

[0033] Vdt = Vdi - Vdc;

[0034] Wherein, Vdt is the target data voltage, Vdi is the initial data voltage, and Vdc is the target compensation feed voltage.

[0035] Secondly, this application also provides a display device, comprising:

[0036] A liquid crystal display panel, the liquid crystal display panel comprising a plurality of sub-pixels to be compensated;

[0037] A compensation data storage module is provided for storing the position parameters of the sub-pixel to be compensated and the compensation feed voltage corresponding to the position parameters.

[0038] An initial data voltage acquisition module is used to acquire the initial data voltage of the sub-pixel to be compensated based on the data to be displayed on the liquid crystal display panel and the position parameters.

[0039] A target compensation feed voltage acquisition module is used to acquire the target compensation feed voltage from the compensation data storage module based on the position parameters.

[0040] The compensation module is used to calculate the target data voltage based on the target compensation input voltage and the initial data voltage, and output the target data voltage to the sub-pixel to be compensated.

[0041] The display device provided in this application further includes a target category parameter acquisition module, which is used to acquire a target category parameter corresponding to the liquid crystal display panel from a plurality of preset category parameters;

[0042] The compensation data storage module is also used to store the category parameters that correspond one-to-one with the position parameters and the compensation feed voltage;

[0043] The target compensation feed voltage acquisition module is also used to acquire the target compensation feed voltage based on the target category parameter and the position parameter.

[0044] The brightness compensation method provided in this application compensates the initial data voltage of the sub-pixel to be compensated by obtaining the target compensation feed voltage of the sub-pixel to be compensated. The target data voltage of the sub-pixel to be compensated is calculated from the target compensation feed voltage and the initial data voltage, so that the difference between the target data voltage of any sub-pixel to be compensated and the common voltage of the liquid crystal display panel tends to be equal, thereby making the brightness of the sub-pixels to be compensated affected by different feed voltages tend to be the same, thereby reducing the occurrence of the head-shaking pattern phenomenon of the liquid crystal display panel. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the equivalent capacitance of a sub-pixel in a liquid crystal display panel.

[0046] Figure 2 This is a schematic diagram illustrating the effect of the input voltage on the data voltage.

[0047] Figure 3 A schematic diagram of a liquid crystal display panel with a data line-shared pixel architecture for related technologies;

[0048] Figure 4 for Figure 3 A simplified schematic diagram of the liquid crystal display panel shown;

[0049] Figure 5 A schematic diagram of the first step of the brightness compensation method provided in the embodiments of this application;

[0050] Figure 6 for Figure 5 A schematic diagram of one step in step S104;

[0051] Figure 7 for Figure 6 A schematic diagram of one step of step S1042 in the process;

[0052] Figure 8 for Figure 7 A schematic diagram of one step of step S10422 in the diagram;

[0053] Figure 9 for Figure 8 A schematic diagram of one step in step S10422b;

[0054] Figure 10 A schematic diagram of the second step of the brightness compensation method provided in the embodiments of this application;

[0055] Figure 11a A schematic diagram showing the first display pattern in the test area;

[0056] Figure 11b A schematic diagram showing the second display pattern in the test area;

[0057] Figure 11c A schematic diagram showing a third display pattern in the test area;

[0058] Figure 11d A schematic diagram showing the fourth display pattern in the test area;

[0059] Figure 12 A first block diagram of a display device provided for an embodiment of this application;

[0060] Figure 13 A second block diagram of a display device provided for an embodiment of this application. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. The described embodiments are only used to explain the ideas of the present invention and should not be regarded as limiting the scope of protection of this application.

[0062] For LCD panels, among the three factors—the difference in arm length caused by the connection method between each sub-pixel and the data line and scan line, the difference in charging time between each sub-pixel, and the difference in feed voltage between each sub-pixel—the difference in feed voltage between each sub-pixel causes a greater difference in brightness, and the difference in feed voltage between each sub-pixel causes a longer Mura duration period. Therefore, the difference in feed voltage is the main reason for the head-shaking pattern phenomenon in LCD panels.

[0063] It should be noted that, in the embodiments of this application, the feed voltage refers to the coupling voltage generated on the pixel electrode through the coupling capacitance between the gate and source of the switching thin-film transistor in the sub-pixel when the switching thin-film transistor in the sub-pixel switches from the on state to the off state (hereinafter referred to as the first type of feed voltage), and / or, refers to the coupling voltage generated on the pixel electrode through the coupling capacitance between the pixel electrode in the sub-pixel and the gate of the switching thin-film transistor when the switching thin-film transistor in the sub-pixel switches from the on state to the off state (hereinafter referred to as the second type of feed voltage).

[0064] Specifically, such as Figure 1 As shown, a sub-pixel SP includes a switching thin-film transistor (TFT), a pixel electrode, and a storage capacitor. The pixel electrode is electrically connected to the drain of the TFT, the gate of the TFT is electrically connected to a scan line SL, and the source of the TFT is electrically connected to a data line DL.

[0065] Liquid crystal molecules have a characteristic: when the same bias voltage is applied, they will polarize, reducing their lifespan. Because of this characteristic, liquid crystal display panels use polarity-reversed driving voltages. For each sub-pixel of the liquid crystal display panel, the polarity of the data voltage applied to the liquid crystal capacitor between adjacent frames is opposite, and ideally, such as... Figure 2 As shown, between two adjacent frames, the positive polarity data voltage Vdata+ and the negative polarity data voltage Vdata- corresponding to the same sub-pixel should be symmetrical with respect to the common voltage Vcom. That is, the difference between Vdata+ and Vcom is equal to the difference between Vcom and Vdata-.

[0066] Specifically, for the same sub-pixel, since the polarity of the data voltage in frame f is opposite to that in frame f+1, and they are symmetrical about the common voltage Vcom, the absolute value of the voltage applied to the liquid crystal capacitor Clc can be the same. Therefore, after the liquid crystal molecules rotate, the light transmitted is also the same, ensuring that a sub-pixel displays the same gray level in frame f and frame f+1.

[0067] However, due to the presence of coupling capacitor Cgd, when the driving voltage on the scan line GL drops from Von to Voff, the switching thin-film transistor (TFT) turns off. At this time, the charges on the liquid crystal capacitor Clc, storage capacitor Cs, and coupling capacitor Cgd are redistributed, resulting in a first-type feed voltage ΔVp for the data voltage Vp. The voltage change at the gate of the switching TFT at this time is ΔVg = Voff - Von, and the first-type feed voltage ΔVp is:

[0068]

[0069] In equation (1), Cgd is the coupling capacitance between the gate and drain of the switching thin-film transistor TFT, Clc refers to the liquid crystal capacitor, and Cs refers to the storage capacitance of the sub-pixel.

[0070] Due to the influence of the first type of feed voltage, the potential of the actual data voltage applied to the pixel electrode is lower than the potential of the initial data voltage provided by the data line. Since the feed voltage of different sub-pixels is different, even if the initial data voltage provided to multiple sub-pixels by multiple data lines is the same, the actual data voltage received by the pixel electrode is not consistent, resulting in different brightness between different sub-pixels, producing Mura and the head-shaking pattern phenomenon.

[0071] The input voltage causes changes in the data voltage, which indirectly leads to a shift in the best common voltage (Best Vcom, BV) (the positive and negative data voltages of the same sub-pixel are symmetrical about the best common voltage). This results in the same sub-pixel emitting different brightness when it receives a positive data voltage and when it receives a negative data voltage.

[0072] For sub-pixels receiving positive data voltage, a larger feed voltage Vft results in a smaller actual positive data voltage Vdata+ applied to the pixel electrode, a smaller voltage difference between the actual positive data voltage Vdata+ and the common voltage, and a darker sub-pixel. Conversely, for sub-pixels receiving negative data voltage, a larger feed voltage Vft results in a smaller actual negative data voltage Vdata- applied to the pixel electrode, a larger voltage difference between the actual negative data voltage Vdata- and the common electrode, and a brighter sub-pixel.

[0073] However, in a liquid crystal display panel, the data voltage of all sub-pixels is affected by the first type of feed voltage. Furthermore, if the connecting electrode in the sub-pixel has a long arm, Cgs is large, resulting in a large first type of feed voltage. Conversely, if the connecting electrode in the sub-pixel has a short arm, Cgs is small, resulting in a small first type of feed voltage.

[0074] To facilitate a deeper understanding of the first and second type of feed voltages, the following explanation will be based on an LCD panel with a Data Line Share (DLS) pixel architecture.

[0075] like Figure 3 As shown, the terms "long arm" and "short arm" for connecting electrodes are relative; for example, the connecting electrode at a1 is a long arm, and the connecting electrode at a2 is a short arm. It should be understood that, in the embodiments of this application, "connecting electrode" refers to an electrode made of conductive material between the pixel electrode of the connecting opening region and the drain of the switching thin-film transistor within a sub-pixel.

[0076] Specifically, such as Figure 3 As shown, taking the plane containing multiple sub-pixels arranged in an array as the reference plane, when the gate of the switching thin-film transistor connected to the pixel electrode of the sub-pixel is located above this pixel electrode (e.g. Figure 3 If the sub-pixel is subjected to a second type of feed voltage (as shown in b1), then this sub-pixel will also be affected by the second type of feed voltage. If the gate of the switching thin-film transistor connected to the pixel electrode of the sub-pixel is located below this pixel, then this sub-pixel will not be affected by the second type of feed voltage.

[0077] Furthermore, if it is related to the sub-pixels of the current row (where the current row refers to...) Figure 3 The next row adjacent to the pixel row connected to scan line GL2n-1 and scan line GL2n (here, the next row refers to...) Figure 3 If the gate of the switching thin-film transistor connected to the sub-pixel of the row of pixels connected to scan lines GL2n+1 and GL2n+2 is the portion of the switching thin-film transistor opposite to the pixel electrode of the sub-pixel in the current row, then Cpg is smaller, and the second type of feed voltage is smaller. If the gate of the switching thin-film transistor connected to the sub-pixel of the next row adjacent to the current row is the portion of the scan line opposite to the pixel electrode of the sub-pixel in the current row, then Cpg is larger, and the second type of feed voltage is larger.

[0078] It is worth mentioning that, in fact, the pixel electrode of the current row of sub-pixels will also generate some coupling capacitance with the scan lines further away, and these coupling capacitances will also generate third-type feed voltage and even fourth-type feed voltage on the pixel voltage of the sub-pixel. However, since the distance between the pixel electrode of the current row and the scan lines further away is relatively large, the influence of the scan lines further away on the pixel electrode of this sub-pixel is small, so the third-type feed voltage and the fourth-type feed voltage can be ignored.

[0079] like Figure 3 As shown, in the nth pixel row, the sub-pixels in columns 2m-1 and 2m are both connected to the mth data line DLm, and the sub-pixels in columns 2m+1 and 2m+2 are both connected to the (m+1)th data line DLm+1. Furthermore, each pixel row is arranged with red sub-pixels R, green sub-pixels G, and blue sub-pixels B in a repeating pattern. A portion of the sub-pixels in the nth pixel row are connected to the 2n-1th scan line GL2n-1, and another portion of the sub-pixels in the nth pixel row are connected to the 2nth scan line GL2n.

[0080] Assuming the same resolution, a DLS pixel architecture LCD panel requires half the number of data lines as a 1G1D pixel architecture LCD panel. Because the DLS pixel architecture can reduce the number of data lines by half, the number of source driver chips in a DLS-based LCD panel can be halved, thereby reducing the manufacturing cost of the LCD panel.

[0081] However, the number of scan lines required for a liquid crystal display panel with a DLS pixel architecture is twice that required for a liquid crystal display panel with a 1G1D pixel architecture. As a result, the DLS pixel architecture increases the design difficulty of the array substrate row drive circuit (GOA) and halves the charging time of subpixels, which may lead to subpixel charging problems.

[0082] Furthermore, the inversion of pixel polarity in the DLS pixel architecture, which is done in two-column units, further increases the duration of bright and dark vertical lines, thus exacerbating the head-shaking pattern phenomenon in DLS.

[0083] Specifically, for Figure 3 The connection electrodes of sub-pixels SP(2m-1,n) and SP(2m+1,n) are both short-armed (e.g. Figure 3 As shown in a1), the connecting electrodes of sub-pixels SP(2m,n) and SP(2m+2,n) are both long arms (as shown in a1). Figure 3 As shown in a2), the voltage values ​​of the first type of feed voltage of sub-pixel SP(2m-1,n) and sub-pixel SP(2m+1,n) are less than the voltage values ​​of the first type of feed voltage of sub-pixel SP(2m,n) and sub-pixel SP(2m+2,n).

[0084] Furthermore, for the first type of feed voltage, since Figure 3The scan lines of the liquid crystal display panel shown are opened line by line from scan line 2n-2 to scan line 2n+2. Scan line 2n-1 controls the switching thin-film transistors in the sub-pixels SP(2m+3,n) and SP(2m+2,n) connected to it to conduct for charging. Subsequently, scan line 2n controls the switching thin-film transistors in the sub-pixels SP(2m+1,n) and SP(2m+4,n) connected to it to conduct for charging. At this time, scan line 2n has a large coupling capacitance Cpg to the pixel electrodes of sub-pixels SP(2m+3,n) and SP(2m+2,n) charged by scan line 2n-1 GL2n-1. Subsequently, the 2n+2 scan line GL2n+2, being relatively far away, has only a small coupling capacitance Cpg to the sub-pixels SP(2m+1,n) and SP(2m+3,n) that are charged by the 2n scan line GL2n, which can be ignored.

[0085] Furthermore, for the second type of feed voltage, differences arise due to the relative positional relationship between the scan lines and the pixel electrodes. Because the lateral overlap area between the pixel electrode of sub-pixel SP(2m+3,n) and the 2nth scan line GL2n is smaller, while the lateral overlap area between the pixel electrode of sub-pixel SP(2m+2,n) and the 2nth scan line GL2n is larger (e.g., ... Figure 3 As shown in b2), the feed voltage of sub-pixel SP(2m+2,n) due to the second feed effect is greater than that of sub-pixel SP(2m+3,n) due to the second feed effect.

[0086] In summary, based on Table 1 below, there are a total of four feed voltage types in the DLS pixel architecture liquid crystal display panel. Where Near refers to the short arm connecting the electrode, Far refers to the long arm connecting the electrode, and 1... st Vft refers to the first type of feed voltage, 2 nd Vft refers to the type II feed voltage.

[0087]

[0088] Table 1

[0089] Specifically, such as Figure 4 As shown, Figure 4In the diagram, "+" indicates that the sub-pixel received a positive data voltage in the current frame, and "-" indicates that the sub-pixel received a negative data voltage in the current frame. Therefore, sub-pixels PS(2m-1,n), PS(2m,n), PS(2m+1,n+1), and PS(2m+2,n+1) are dark, while sub-pixels PS(2m+1,n), PS(2m+2,n), PS(2m,n+1), and PS(2m-1,n+1) are bright. When the instantaneous speed at which the user's eye moves matches the frame switching of the LCD panel, the displayed image appears as bright and dark lines, a phenomenon known as "eye-shaking lines."

[0090] To reduce or even eliminate the appearance of head-shaking lines, embodiments of this application provide a brightness compensation method that compensates for the feed voltage of sub-pixels at the driving level of the liquid crystal display panel, making the feed voltage between sub-pixels uniform, and adjusting and maintaining the actual common voltage at the optimal common voltage to eliminate brightness differences between sub-pixels caused by differences in feed voltage.

[0091] like Figure 5 As shown, the brightness compensation method 100 provided in the embodiments of this application includes steps S102, S104, S106, S108 and S110.

[0092] Step S102: Obtain the position parameters of the sub-pixels to be compensated in the liquid crystal display panel.

[0093] Here, "position parameters of the sub-pixel to be compensated" refers to the coordinate values ​​of the sub-pixel to be compensated on the liquid crystal display panel. The coordinate values ​​represent the pixel row and pixel column of the sub-pixel to be compensated on the liquid crystal display panel. For example, if the sub-pixel to be compensated is located in the j-th pixel row and the k-th pixel column of the liquid crystal display panel, then the coordinate value of the sub-pixel to be compensated is (k, j), so the position parameters of the sub-pixel to be compensated can be represented as (k, j).

[0094] It should be understood that before performing step S102, the position parameters of the sub-pixels to be compensated have been determined and stored in a computer-readable storage medium.

[0095] Step S104: Obtain the target compensation feed voltage of the sub-pixel to be compensated based on the position parameters.

[0096] Here, "target compensation feed voltage" refers to the compensation feed voltage corresponding to this position parameter. "Compensation feed voltage" refers to the voltage value that needs to be compensated for this sub-pixel based on the feed voltage value received by the compensation sub-pixel corresponding to this position parameter.

[0097] Therefore, during the debugging stage before the LCD panel leaves the factory, it is necessary to detect the magnitude of the input voltage of the sub-pixel to be compensated, calculate the voltage value that needs to be compensated for the sub-pixel based on the detected input voltage value, and store the calculated voltage value that needs to be compensated for the sub-pixel in a computer-readable medium.

[0098] As explained above regarding the feed voltage, the magnitude of the feed voltage received by a sub-pixel to be compensated is actually related to the positional relationship between the in-phase connected scan lines and data lines of that sub-pixel, and the positional relationship between the pixel electrode and the gate of the switching thin-film transistor in the sub-pixel. Since the pixel architecture of the liquid crystal display panel is fixed, the feed voltage received by the sub-pixel to be compensated is also fixed. Therefore, the target compensation feed voltage required for each sub-pixel to be compensated is also fixed. Thus, a first compensation feed voltage lookup table can be established based on the position parameters of the sub-pixel to be compensated and the compensation feed voltage, and this first compensation feed voltage lookup table can be stored in a computer-readable medium. The position parameters and compensation feed voltages stored in the first compensation feed voltage lookup table have a one-to-one mapping relationship.

[0099] Based on this, in some embodiments provided in this application, step S104 may specifically be: obtaining the target compensation feed voltage of the sub-pixel to be compensated from the compensation feed voltage lookup table based on the position parameters of the sub-pixel to be compensated.

[0100] In other embodiments provided in this application, such as Figure 6 As shown, step S104 also includes steps S1041 and S1042.

[0101] Step S1041: Obtain the target category parameter of the liquid crystal display panel from a plurality of pre-set category parameters.

[0102] Here, "target category parameter" refers to the category parameter corresponding to the pixel architecture of the liquid crystal display panel that is performing the brightness compensation method. One "category parameter" represents the pixel architecture of a liquid crystal display panel, and multiple category parameters correspond one-to-one with the pixel architecture of multiple different liquid crystal display panels.

[0103] As explained earlier regarding feed voltage, in two liquid crystal display panels with the same resolution but different pixel architectures, the feed voltage values ​​experienced by the sub-pixels to be compensated corresponding to the same position parameters are not necessarily the same. For example, the feed voltage value experienced by the sub-pixel to be compensated with position parameters (k, j) in a liquid crystal display panel with a DLS pixel architecture is not necessarily the same as the feed voltage value experienced in a liquid crystal display panel with a 1G1D pixel architecture.

[0104] Therefore, step S1041 determines the pixel architecture of the liquid crystal display panel that is performing the brightness compensation method by obtaining the target category parameters.

[0105] Step S1042: Obtain the target compensation feed voltage based on the target category parameter and the location parameter.

[0106] Based on step S1041, once the target category parameters are determined, the pixel architecture of the liquid crystal display panel is determined. Then, in step S1042, the target compensation feed voltage, which corresponds one-to-one with the pixel architecture of the liquid crystal display panel and the position parameters of the sub-pixels to be compensated, is obtained.

[0107] It is worth mentioning that, during the pre-shipment debugging stage of the liquid crystal display panel, the feed voltage received by the sub-pixels to be compensated in the liquid crystal display panels with different pixel architectures can be detected, and the voltage value that needs to be compensated for the sub-pixels can be calculated. A second compensation feed voltage lookup table is then established based on the compensation voltage value of the sub-pixels under different pixel architectures, the category parameters corresponding to the liquid crystal display panels with different pixel architectures, and the position parameters of the sub-pixels to be compensated. The second compensation feed voltage lookup table is stored in a computer-readable storage medium to enable the execution of steps S1041 and S1042.

[0108] Based on this, in some embodiments provided in this application, step S1042 can specifically be as follows: obtaining the target compensation feed voltage from a plurality of pre-set compensation feed voltages based on the target category parameter and the position parameter. That is, obtaining the target compensation feed voltage of the sub-pixel to be compensated from the second compensation feed voltage lookup table based on the target category parameter and the position parameter. The position parameter, compensation feed voltage, and category parameter stored in the second compensation feed voltage lookup table have a one-to-one mapping relationship, with one compensation feed voltage corresponding to one position parameter and one compensation feed voltage corresponding to one category parameter.

[0109] In other embodiments provided in this application, such as Figure 7 As shown, step S1042 may specifically include step S10421 and step S10422.

[0110] Step S10421: Obtain the target feed voltage type of the sub-pixel to be compensated from a set of preset feed voltage types based on the target category parameter and the position parameter. The feed voltage type corresponds one-to-one with the category parameter and the position parameter.

[0111] Among them, "feed voltage type" represents the source of the feed voltage experienced by the sub-pixel to be compensated corresponding to the position parameters. Figure 4 The DLS pixel architecture shown is an example, which can be used to feed the sub-pixel A with an input voltage of 1. st Vft_Near+2nd Vft_Near uses "N2" to characterize the feed voltage type of sub-pixel A, and the feed voltage 1 received by sub-pixel B. st Vft_Far uses "F1" to characterize the feed voltage type of sub-pixel B, and assigns the feed voltage 1 to sub-pixel C. st Vft_Near uses "N1" to characterize the feed voltage type of sub-pixel C, and sets the feed voltage of sub-pixel D to 1. st Vft_Far+2 nd Vft_Far uses "F2" to characterize the feed voltage type of sub-pixel D.

[0112] For LCD panels with DLS pixel architecture, there are a total of four types of feed voltage. However, the feed voltage types in 1G1D pixel architecture LCD panels are at least partially different from those in DLS pixel architecture LCD panels. Furthermore, the total number of feed voltage types in 1G1D pixel architecture LCD panels is also different from the total number of feed voltage types in DLS pixel architecture LCD panels. Moreover, the feed voltage type corresponding to the same positional parameter in a 1G1D pixel architecture LCD panel is different from the feed voltage type corresponding to the same positional parameter in a DLS pixel architecture LCD panel.

[0113] During the debugging phase before executing step S10421, it is necessary to establish a feed voltage type lookup table that stores the category parameters of the liquid crystal display panel, the position parameters of the sub-pixel to be compensated, and the feed voltage type of the sub-pixel to be compensated. The feed voltage type lookup table is stored in a computer-readable storage medium so that when executing step S10421, the target feed voltage type can be directly obtained from the feed voltage type lookup table according to the target category parameters and position parameters.

[0114] In other words, step S10421 can specifically refer to obtaining the target feed voltage type of the sub-pixel to be compensated from the feed voltage type lookup table based on the target category parameter and the position parameter.

[0115] Step S10422: Obtain the target compensation feed voltage based on the target feed voltage type and target category parameters.

[0116] Specifically, during the debugging phase prior to step S10422, a third compensation feed voltage lookup table is established based on the category parameters of the liquid crystal display panel, the feed voltage type of the sub-pixel to be compensated, and the compensation feed voltage, and the third compensation feed voltage lookup table is stored in a computer-readable storage medium.

[0117] It is worth mentioning that the data content stored in the third compensation feed voltage lookup table in this embodiment is not exactly the same as the data content stored in the first compensation feed voltage lookup table and the second compensation feed voltage lookup table in the aforementioned embodiments.

[0118] Therefore, in some embodiments provided in this application, step S10422 may specifically be to obtain the target compensation feed voltage of the sub-pixel to be compensated from the third compensation feed voltage lookup table based on the target feed voltage type and target category parameters.

[0119] In other embodiments provided in this application, such as Figure 8 As shown, step S10422 includes steps S10422a, S10422b, and S10422c.

[0120] Step S10422a: Obtain the target initial feed voltage of the sub-pixel to be compensated from a plurality of preset initial feed voltages based on the target feed voltage type.

[0121] Here, "target initial feed voltage" refers to the initial feed voltage corresponding to the target feed voltage type. "Initial feed voltage" refers to the feed voltage detected and obtained during the debugging phase before step S10422a for the sub-pixel to be compensated. In the same liquid crystal display panel, there is a one-to-one correspondence between the initial feed voltage and the feed voltage type; that is, if the feed voltage type is fixed, the initial feed voltage is fixed.

[0122] Furthermore, during the debugging phase prior to step S10422a, an initial feed voltage lookup table can be established based on the feed voltage type and the initial feed voltage, and the initial feed voltage lookup table can be stored in a computer-readable storage medium so that when step S10422a is executed, the target initial feed voltage can be directly obtained from the initial feed voltage lookup table based on the target feed voltage type.

[0123] Step S10422b: Obtain the feed standard voltage of the liquid crystal display panel based on the target category parameters.

[0124] Here, "feed standard voltage" refers to the average value of the initial feed voltage corresponding to different feed voltage types in this liquid crystal display panel. Therefore, different liquid crystal display panels have different feed voltage types, and the initial feed voltage values ​​of the sub-pixels to be compensated are different, resulting in different feed standard voltages.

[0125] During the debugging phase prior to step S10422b, a feed standard voltage lookup table can be established based on the category parameters of different liquid crystal display panels and the feed standard voltage of different liquid crystal display panels, and the feed standard voltage lookup table can be stored in a computer-readable storage medium. Specifically, step S10422b can be executed by retrieving the feed standard voltage corresponding to the target category parameter from the feed standard voltage lookup table based on the target category parameter.

[0126] Specifically, such as Figure 9 As shown, in some embodiments provided in this application, step S10422b includes steps S10422b1, S10422b2, and S10422b3.

[0127] Step S10422b1: Obtain the first feed voltage type from multiple feed voltage types based on the target category parameter.

[0128] Here, "first feed voltage type" refers to the set of feed voltage types corresponding to the target category parameters. Since the feed voltage type corresponds one-to-one with the category parameters and position parameters of the liquid crystal display panel, the feed voltage type corresponding to the same category parameter will be different depending on the position parameter. The first feed voltage type specifically refers to the set of feed voltage types corresponding to the target category parameters and position parameters.

[0129] For example, for Figure 4 The liquid crystal display panel with DLS pixel architecture shown includes four types of feed voltages: N1, N2, F1, and F2, corresponding to the category parameters of this liquid crystal display panel.

[0130] Step S10422b2: Obtain the first initial feed voltage from multiple initial feed voltages based on the first feed voltage type.

[0131] Here, "first initial feed voltage" refers to the initial feed voltage corresponding to the first feed voltage type. Since the first feed voltage type is a set of feed voltage types corresponding to the target category parameter, the first initial feed voltage is corresponding to a set of initial feed voltages corresponding to the first feed voltage type parameter.

[0132] Step S10422b3: Calculate the standard feed voltage based on the number of first feed voltage types and the first initial feed voltage.

[0133] Among them, the number of first feed voltage types, the first initial feed voltage, and the feed standard voltage satisfy the third preset relationship:

[0134]

[0135] In the third preset relationship (2), q is the number of the first feed voltage types, Vds is the feed standard voltage of a liquid crystal display panel, and Vdi_q is the first initial feed voltage.

[0136] In this embodiment, the specific voltage value of the feed standard voltage is obtained by looking up a table and calculating based on the preset and stored initial feed voltage and the feed voltage type.

[0137] Step S10422c: The difference between the calculated target initial feed voltage and the feed standard voltage is assigned as the target compensation feed voltage.

[0138] In step S10422c, the target compensation feed voltage, the target initial feed voltage, and the feed standard voltage satisfy a second preset relationship:

[0139] Vdc = Vdf - Vds (3);

[0140] In the second preset relationship (3), Vdc is the target compensation feed voltage, Vdf is the target initial feed voltage, and Vds is the feed standard voltage.

[0141] In this embodiment, the specific voltage value of the target compensation feed voltage is obtained by looking up a table and calculating based on the preset initial feed voltage and feed standard voltage.

[0142] Furthermore, in some embodiments provided in this application, such as Figure 10 As shown, before step S10422a, the brightness compensation method 100 further includes steps S1031 and S1032.

[0143] Step S1031: Detect multiple test sub-pixels in the test area of ​​the liquid crystal display panel and obtain the feed test voltage. Wherein, any two test sub-pixels have the same frame polarity and any two test sub-pixels have the same feed voltage type.

[0144] The "test area" refers to a pre-defined portion of the display area of ​​the liquid crystal display panel, and the "test sub-pixels" are sub-pixels located within the test area that have the same frame polarity and the same feed voltage type. In other words, the test area also includes non-test sub-pixels other than the test sub-pixels.

[0145] In step S1031, the test area includes at least one minimum repeatable unit determined by the feed voltage type and the pixel unit. Specifically, three consecutive sub-pixels of different colors located in the same row constitute one pixel unit.

[0146] by Figure 4Taking the LCD panel with the DLS pixel architecture shown as an example, the smallest repeatable unit included in the test area A_test consists of eight pixel units arranged in two rows and four columns, that is, the smallest repeatable unit included in the test area consists of twenty-four sub-pixels arranged in two rows and twelve columns.

[0147] To obtain Figure 4 If the feed test voltage corresponds to type N1 in the test area, then the sub-pixels in the test area with the same frame polarity and feed voltage type (N1) will be illuminated, while the other sub-pixels in the test area will be turned off. For example... Figure 11a As shown, the sub-pixels in the test area that are of the same frame positive polarity and of the same type N1 are lit up. Specifically, the green sub-pixel in the second pixel unit, the blue sub-pixel in the third pixel unit, and the green sub-pixel in the seventh pixel unit in the test area are lit up, so that the test area displays the first display pattern.

[0148] After being turned on, the common voltage of the LCD panel is adjusted multiple times and the first display pattern is measured to obtain the flicker parameters of the first display pattern in the test area under different common voltages. The common voltage that minimizes the flicker parameters of the first display pattern is taken as the feed-in test voltage corresponding to type N1.

[0149] The flicker parameters can be measured using optical methods, such as using a color analyzer.

[0150] Similarly, in order to obtain Figure 4 The feed test voltage corresponding to type N2 in the test area will illuminate the sub-pixels in the test area that have the same frame polarity and feed voltage type N2, while turning off the other sub-pixels in the test area. For example... Figure 11b As shown, the sub-pixels in the test area that are of the same frame positive polarity and of the same type N2 are lit up. Specifically, the green sub-pixel in the first pixel unit, the blue sub-pixel in the fifth pixel unit, and the green sub-pixel in the eighth pixel unit in the test area are lit up, so that the test area displays the second display pattern.

[0151] After being lit, the common voltage of the LCD panel is adjusted multiple times and the second display pattern is measured to obtain the flicker parameters of the second display pattern in the test area under different common voltages. The common voltage that minimizes the flicker parameters of the second display pattern is taken as the feed-in test voltage corresponding to the N2 type.

[0152] Similarly, in order to obtain Figure 4 If the feed test voltage corresponds to type F1 in the test area, then the sub-pixels in the test area with the same frame polarity and feed voltage type F1 will be illuminated, while the other sub-pixels in the test area will be turned off. For example... Figure 11cAs shown, the sub-pixels in the test area that are of the same frame positive polarity and of the same type F1 are lit up. Specifically, the red sub-pixel in the first pixel unit, the red sub-pixel in the sixth pixel unit, and the blue sub-pixel in the eighth pixel unit in the test area are lit up, so that the test area displays the third display pattern.

[0153] After being lit, the common voltage of the LCD panel is adjusted multiple times and the third display pattern is measured to obtain the flicker parameters of the third display pattern in the test area under different common voltages. The common voltage that minimizes the flicker parameters of the third display pattern is taken as the feed-in test voltage corresponding to type F1.

[0154] Similarly, in order to obtain Figure 4 If the feed test voltage corresponds to type F2 in the test area, then the sub-pixels in the test area with the same frame polarity and feed voltage type F2 will be illuminated, while the other sub-pixels in the test area will be turned off. For example... Figure 11d As shown, the sub-pixels in the test area that are of the same frame positive polarity and of the same type F2 are lit up. Specifically, the blue sub-pixel in the second pixel unit, the red sub-pixel in the fourth pixel unit, and the red sub-pixel in the seventh pixel unit in the test area are lit up, so that the test area displays the fourth display pattern.

[0155] After being lit, the common voltage of the LCD panel is adjusted multiple times and the fourth display pattern is measured to obtain the flicker parameters of the fourth display pattern in the test area under different common voltages. The common voltage that minimizes the flicker parameters of the fourth display pattern is taken as the feed-in test voltage corresponding to type F2.

[0156] Step S1032: Assign the feed test voltage corresponding to a feed voltage type to the initial feed voltage corresponding to the same feed voltage type.

[0157] That is, still based on Figure 4 Taking the LCD panel shown as an example, the feed test voltage corresponding to feed voltage type N1 is assigned the initial feed voltage corresponding to feed voltage type N1, the feed test voltage corresponding to feed voltage type N2 is assigned the initial feed voltage corresponding to feed voltage type N2, the feed test voltage corresponding to feed voltage type F1 is assigned the initial feed voltage corresponding to feed voltage type F1, and the feed test voltage corresponding to feed voltage type F2 is assigned the initial feed voltage corresponding to feed voltage type F2.

[0158] It should be noted that steps S1031 and S1032 are both completed during the debugging stage before the LCD panel leaves the factory.

[0159] Step S106: Obtain the initial data voltage of the sub-pixel to be compensated based on the data to be displayed and the position parameters of the liquid crystal display panel.

[0160] Here, "data to be displayed" refers to the set of grayscale data that constitute the frame of the liquid crystal display panel to be displayed. "Initial data voltage" refers to the grayscale data corresponding to the sub-pixel to be compensated in the frame of the image to be displayed.

[0161] Step S108: Calculate the target data voltage of the sub-pixel to be compensated based on the target compensation feed voltage and the initial data voltage.

[0162] Specifically, step S108 includes: calculating the target data voltage based on a first preset formula, the target compensation feed voltage, and the initial data voltage. The first preset formula is:

[0163]

[0164] In the first preset relationship (4), Vdt is the target data voltage, Vdi is the initial data voltage, and Vdc is the target compensation feed voltage.

[0165] Step S110: Perform brightness compensation on the liquid crystal display panel according to the target data voltage.

[0166] Specifically, the calculated target data voltage is output to the pixel electrode of the sub-pixel to be compensated via a data line. The sub-pixel to be compensated is charged with the target data voltage, so that the difference between the target data voltage of any sub-pixel to be compensated and the common voltage of the liquid crystal display panel tends to be equal. That is, the difference between the positive polarity target data voltage of any sub-pixel to be compensated and the common voltage of the liquid crystal display panel tends to be equal to the difference between the negative polarity target data voltage of any sub-pixel to be compensated and the common voltage of the liquid crystal display panel. In this way, the brightness of the sub-pixels to be compensated affected by different feed voltages can be made more uniform, thereby improving the problem of head-shaking patterns on the liquid crystal display panel.

[0167] Based on the brightness compensation method provided in the above embodiments, this application also provides a display device. For example... Figure 12 As shown, the display device 200 includes a liquid crystal display panel 201, a position parameter acquisition module 202, a compensation data storage module 203, an initial data voltage acquisition module 204, a target compensation feed voltage acquisition module 205, and a compensation module 206.

[0168] The liquid crystal display panel 201 includes a plurality of sub-pixels to be compensated (not shown in the figure).

[0169] The position parameter acquisition module 202 is used to acquire the position parameters of the sub-pixel to be compensated.

[0170] The compensation data storage module 203 is used to store the position parameters of the sub-pixel to be compensated and the compensation feed voltage corresponding to the position parameters.

[0171] The initial data voltage acquisition module 204 is used to acquire the initial data voltage of the sub-pixel to be compensated based on the data to be displayed and the position parameters of the liquid crystal display panel 201.

[0172] The target compensation feed voltage acquisition module 205 is used to acquire the target compensation feed voltage from the compensation data storage module 203 based on the position parameters.

[0173] The compensation module 206 is used to calculate the target data voltage based on the target compensation input voltage and the initial data voltage, and output the target data voltage to the sub-pixel to be compensated.

[0174] In the display device 200 provided in this embodiment, the compensation module 206 outputs a target data voltage to the sub-pixel to be compensated, so that the difference between the target data voltage of any sub-pixel to be compensated and the common voltage of the liquid crystal display panel tends to be equal. That is, the difference between the positive polarity target data voltage of any sub-pixel to be compensated and the common voltage of the liquid crystal display panel and the difference between the negative polarity target data voltage of any sub-pixel to be compensated and the common voltage of the liquid crystal display panel tends to be equal. In this way, the brightness of sub-pixels affected by different types of feed voltages can be made to be more similar, thereby improving the problem of head-shaking patterns on the liquid crystal display panel.

[0175] Furthermore, such as Figure 13 As shown, the display device 200 also includes a target category parameter acquisition module 207. The target category parameter acquisition module 207 is used to acquire the target category parameter corresponding to the liquid crystal display panel 201 from a plurality of preset category parameters.

[0176] The compensation data storage module 203 is also used to store category parameters that correspond one-to-one with the position parameters and the compensation feed voltage.

[0177] The target compensation feed voltage acquisition module 205 is also used to acquire the target compensation feed voltage based on the target category parameter and the position parameter.

[0178] For liquid crystal display panels with different pixel architectures, the feed voltages of sub-pixels to be compensated with the same position parameters are not the same, and therefore the target compensation feed voltages required for sub-pixels to be compensated with the same position parameters are not the same.

[0179] The display device of this embodiment, through a compensation data storage module that stores category parameters, position parameters, and compensation feed voltage, a target category parameter acquisition module that obtains the target category parameters of the liquid crystal display panel requiring brightness compensation, and a target compensation feed voltage acquisition module that obtains the target compensation feed voltage from the compensation data storage module based on the target category parameters and position parameters, can make the brightness of sub-pixels in liquid crystal display panels with different pixel architectures that are affected by different types of feed voltages tend to be the same, thereby improving the problem of head-shaking patterns in liquid crystal display panels.

[0180] The above-described operations and / or functions in the display device provided in this application are used to implement the corresponding process of the brightness compensation method provided in this application.

[0181] The display device provided in this application includes a processor and a memory, wherein the processor and the memory exchange data via signal lines. The memory is used to store program code, and when the display device is running, the processor executes the program code to perform the brightness compensation method provided in this application.

[0182] The memory of this application stores program code that causes the display device to execute the brightness compensation method provided in this application.

[0183] The memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other non-volatile computer-readable storage medium capable of carrying or storing data.

[0184] The processor of the display device 200 can be composed of integrated circuits. For example, it can be composed of a single packaged integrated circuit, or it can be composed of multiple integrated circuits packaged with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. Among them, at least one processor is the control unit of the display device 200, which connects to various components of the display device 200 through various interfaces and lines. It executes programs, modules, or instructions stored in memory, and calls data stored in memory to perform various functions of the display device 200 and process data.

[0185] In any of the embodiments provided in this application, the display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, or laptop computer.

[0186] Of course, this application may have other various embodiments. Without departing from the spirit and essential points of this application, those skilled in the art can make various corresponding changes and modifications based on this application, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A brightness compensation method, characterized in that, include: Obtain the position parameters of the sub-pixels to be compensated on the liquid crystal display panel; The target compensation feed voltage of the sub-pixel to be compensated is obtained based on the position parameters; The initial data voltage of the sub-pixel to be compensated is obtained based on the data to be displayed on the liquid crystal display panel and the position parameters. The target data voltage of the sub-pixel to be compensated is calculated based on the target compensation feed voltage and the initial data voltage. Brightness compensation is performed on the liquid crystal display panel based on the target data voltage; The step of obtaining the target compensation feed voltage of the sub-pixel to be compensated based on the position parameters includes: Obtain the target category parameter corresponding to the liquid crystal display panel from a plurality of pre-set category parameters; The target feed voltage type of the sub-pixel to be compensated is obtained from a plurality of pre-set feed voltage types based on the target category parameter and the position parameter, wherein the feed voltage type corresponds one-to-one with the category parameter and the position parameter; The target initial feed voltage of the sub-pixel to be compensated is obtained from a plurality of pre-set initial feed voltages based on the target feed voltage type. The feed standard voltage of the liquid crystal display panel is obtained based on the target category parameters; The difference between the calculated target initial feed voltage and the standard feed voltage is assigned as the target compensation feed voltage.

2. The brightness compensation method according to claim 1, characterized in that, The step of obtaining the target compensation feed voltage based on the target category parameter and the location parameter includes: The target compensation feed voltage is obtained from a plurality of pre-set compensation feed voltages based on the target category parameter and the position parameter, wherein the compensation feed voltage corresponds one-to-one with the category parameter and the position parameter.

3. The brightness compensation method according to claim 2, characterized in that, The step of obtaining the feed standard voltage of the liquid crystal display panel based on the target category parameter includes: The first feed voltage type is obtained from the plurality of feed voltage types based on the target category parameter; A first initial feed voltage is obtained from a plurality of initial feed voltages based on the first feed voltage type; The feed standard voltage is calculated based on the number of the first feed voltage types and the first initial feed voltage.

4. The brightness compensation method according to claim 2, characterized in that, Before the step of obtaining the target initial feed voltage of the sub-pixel to be compensated from a plurality of pre-set initial feed voltages based on the target feed voltage type, the brightness compensation method further includes: Multiple test sub-pixels in the test area of ​​the liquid crystal display panel are detected and the feed test voltage is obtained, wherein any two test sub-pixels have the same frame polarity and any two test sub-pixels have the same feed voltage type. The feed test voltage corresponding to one of the feed voltage types is assigned the value of the initial feed voltage corresponding to the same feed voltage type.

5. The brightness compensation method according to claim 1, characterized in that, The step of calculating the target data voltage based on the target compensation feed voltage and the initial data voltage includes: The target data voltage is calculated based on a first preset relationship, the target compensation feed voltage, and the initial data voltage. The first preset relationship is: Vdt = Vdi - Vdc; Wherein, Vdt is the target data voltage, Vdi is the initial data voltage, and Vdc is the target compensation feed voltage.

6. A display device, characterized in that, include: A liquid crystal display panel, the liquid crystal display panel comprising a plurality of sub-pixels to be compensated; A compensation data storage module is provided for storing the position parameters of the sub-pixel to be compensated and the compensation feed voltage corresponding to the position parameters. An initial data voltage acquisition module is used to acquire the initial data voltage of the sub-pixel to be compensated based on the data to be displayed on the liquid crystal display panel and the position parameters. A target compensation feed voltage acquisition module is used to acquire the target compensation feed voltage from the compensation data storage module based on the position parameters. The compensation module is used to calculate the target data voltage based on the target compensation input voltage and the initial data voltage, and output the target data voltage to the sub-pixel to be compensated. The display device further includes a target category parameter acquisition module, which is used to acquire a target category parameter corresponding to the liquid crystal display panel from a plurality of pre-set category parameters; The compensation data storage module is also used to store the category parameters that correspond one-to-one with the position parameters and the compensation feed voltage; The target compensation feed voltage acquisition module is further configured to acquire the target compensation feed voltage based on the target category parameter and the position parameter; The target compensation feed voltage acquisition module is specifically used to acquire the target feed voltage type of the sub-pixel to be compensated from a plurality of pre-set feed voltage types based on the target category parameter and the position parameter, wherein the feed voltage type corresponds one-to-one with the category parameter and the position parameter; and to acquire the target initial feed voltage of the sub-pixel to be compensated from a plurality of pre-set initial feed voltages based on the target feed voltage type. The standard feed voltage of the liquid crystal display panel is obtained based on the target category parameter; the difference between the calculated target initial feed voltage and the standard feed voltage is assigned as the target compensation feed voltage.

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