Liquid crystal display device and driving method therefor, and driving module

Abstract

Provided are a liquid crystal display device and a driving method therefor, and a driving module. The liquid crystal display device comprises a liquid crystal display panel and a backlight module; the backlight module comprises a plurality of lamp regions; the liquid crystal display panel comprises a plurality of pixels arranged in an array. The driving method for the liquid crystal display device comprises: acquiring initial screen data (S110); on the basis of the initial screen data, determining a lamp region feature value of each lamp region, a compensation rate threshold of each pixel, and a candidate compensation rate of each pixel, wherein within at least part of a grayscale range, the compensation rate threshold of the pixel is negatively correlated with the initial grayscale of the pixel (S120); determining an actual compensation rate of the pixel on the basis of the compensation rate threshold and the candidate compensation rate of the pixel (S130); and driving the backlight module on the basis of the lamp region feature value of the lamp region, and driving the liquid crystal display panel on the basis of the actual compensation rate of the pixel (S140).

Description

Liquid crystal display device and driving method thereof, and driving module TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular, to a liquid crystal display device and a driving method thereof, and a driving module. BACKGROUND

[0002] When a local dimming algorithm is used in a liquid crystal display device, pixel compensation overflow is prone to occur. The pixel compensation overflow can cause pattern loss or pixel color deviation, and reduce display effect.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art.

[0004] SUMMARY

[0005] The present disclosure aims to overcome the shortcomings of the prior art, and provides a liquid crystal display device and a driving method thereof, and a driving module.

[0006] According to one aspect of the present disclosure, a driving method of a liquid crystal display device is provided, wherein the liquid crystal display device comprises a liquid crystal display panel and a backlight module; the backlight module comprises a plurality of lamp zones, and the liquid crystal display panel comprises a plurality of pixels arranged in an array;

[0007] The driving method of the liquid crystal display device comprises:

[0008] obtaining initial picture data;

[0009] determining a lamp zone characteristic value of each of the lamp zones, a compensation ratio threshold of each of the pixels, and a candidate compensation ratio of each of the pixels according to the initial picture data; wherein in at least a part of a gray scale range, the compensation ratio threshold of the pixel is negatively correlated with an initial gray scale of the pixel;

[0010] determining an actual compensation ratio of each of the pixels according to the compensation ratio threshold and the candidate compensation ratio of each of the pixels;

[0011] driving the backlight module according to the lamp zone characteristic value of each of the lamp zones, and driving the liquid crystal display panel according to the actual compensation ratio of each of the pixels.

[0012] According to another aspect of the present disclosure, a driving module of a liquid crystal display device is provided, wherein the liquid crystal display device further comprises a liquid crystal display panel and a backlight module; the backlight module comprises a plurality of lamp zones, and the liquid crystal display panel comprises a plurality of pixels arranged in an array;

[0013] The driving module of the liquid crystal display device comprises:

[0014] a data acquisition module configured to acquire initial picture data;

[0015] a correction calculation module configured to determine a lamp area characteristic value of each of the lamp areas and a compensation multiplier threshold of each pixel and a candidate compensation multiplier of each pixel according to the initial picture data, wherein the compensation multiplier threshold of the pixel is negatively correlated with the initial gray scale of the pixel in at least a part of the gray scale range;

[0016] a correction multiplier determination module configured to determine an actual compensation multiplier of each pixel according to the compensation multiplier threshold and the candidate compensation multiplier of each pixel;

[0017] a driving module configured to drive the backlight module according to the lamp area characteristic value of each of the lamp areas and drive the liquid crystal display panel according to the actual compensation multiplier of each of the pixels.

[0018] According to still another aspect of the present disclosure, there is provided a liquid crystal display device comprising the above-mentioned driving module.

[0019] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure. It is readily apparent to one of ordinary skill in the art that the accompanying drawings only illustrate some embodiments of the present disclosure and other drawings can be obtained by one of ordinary skill in the art without any creative effort based on the accompanying drawings.

[0021] FIG. 1 is a structural schematic diagram of a liquid crystal display device according to an embodiment of the present disclosure.

[0022] FIG. 2 is a structural schematic diagram of a liquid crystal display panel according to an embodiment of the present disclosure.

[0023] FIG. 3 is a structural schematic diagram of a backlight module according to an embodiment of the present disclosure.

[0024] FIG. 4 is a flowchart of a driving method of a liquid crystal display device according to an embodiment of the present disclosure.

[0025] FIG. 5 is a structural schematic diagram of a driving module of a liquid crystal display device according to an embodiment of the present disclosure.

[0026] FIG. 6-1 is a diagram showing the change of light intensity distribution in a lamp area when a filter matrix is used to filter the initial lamp area characteristic value of the lamp area. FIG. 6-2 is a diagram showing the comparison of light intensity distribution in a lamp area when a filter matrix is not used to filter the initial lamp area characteristic value of the lamp area.

[0027] FIG. 7 is a schematic diagram of the relative positions between a pixel and the center of a lamp region in one embodiment of the present disclosure.

[0028] FIG. 8 is a schematic diagram of the light intensity distribution of a lamp region in one embodiment of the present disclosure.

[0029] FIG. 9 is a schematic diagram of the light diffusion of a lamp region in one embodiment of the present disclosure.

[0030] FIG. 10 is a schematic diagram of the relationship between a compensation factor threshold and an initial gray scale in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided as non-limiting examples so that this disclosure will fully convey the scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus description of the same will be omitted. Further, the drawings are merely schematic and are not drawn to scale.

[0032] While relative terms such as "upper," "lower," may be used in this specification to describe one component's relationship to another component of a figure, such terminology is used in this specification for convenience only and is not limiting of the example embodiments. It will be understood that, if a device of a figure is turned over so that its upper portion is now a lower portion, the component previously described as being "upper" will now be "lower." When a structure is "on" another structure, it can be directly on the other structure or "indirectly" on the other structure via an intervening structure.

[0033] The terms "a," "an," "the" and "at least one" are used to mean one or more elements / components / etc.; the terms "comprises," "comprising," "includes," "including" and the like can be used to mean one or more elements / components / etc. other than those listed; the term "or" can mean "and / or" and the terms "first," "second," and "third," etc. can be used to distinguish between two or more elements / components / etc. without necessarily implying an ordering.

[0034] The present disclosure provides a liquid crystal display device and a driving method thereof. Referring to FIG. 1, the liquid crystal display device includes a liquid crystal display module and a driving module CTR for driving the liquid crystal display module. The liquid crystal display module includes a backlight module BLU and a liquid crystal display panel PNL which are sequentially stacked. The liquid crystal display panel is provided with pixels arranged in an array, each pixel including a plurality of sub-pixels, such as a red sub-pixel, a green sub-pixel and a blue sub-pixel. The driving module can control the backlight module and the liquid crystal display panel, such as controlling the backlight brightness of the backlight module and the light transmittance of the sub-pixel area of the liquid crystal display panel, so as to make the display device display a picture.

[0035] From the perspective of the stacked structure, the liquid crystal display panel can include an array substrate and a color film substrate which are sequentially stacked, a liquid crystal cell surrounded by a sealant is arranged between the array substrate and the color film substrate, and a liquid crystal is arranged in the liquid crystal cell. The liquid crystal display panel further includes a first polarizer located on the side of the array substrate away from the color film substrate and a second polarizer located on the side of the color film substrate away from the array substrate. The array substrate is provided with a pixel electrode and a pixel driving circuit for loading a data voltage to the pixel electrode. The array substrate or the color film substrate is provided with a common electrode. By controlling the electric field intensity between the pixel electrode and the common electrode, the twisting degree or the laying degree of the liquid crystal in the corresponding range of the pixel electrode can be adjusted, the polarization direction of the polarized light passing through the liquid crystal is adjusted, and finally the light transmittance of the liquid crystal display panel in the corresponding range of the pixel electrode is adjusted.

[0036] In an embodiment of the present disclosure, referring to FIG. 2, the liquid crystal display panel can include a display area AA and a peripheral area BB surrounding the display area AA. In the display area AA, the array substrate is provided with scan wires GL extending in the row direction and data wires DL extending in the column direction, the scan wires GL and the data wires DL define a plurality of pixel areas, and the pixel electrode and the pixel driving circuit can be located in the pixel areas. In an example, the pixel driving circuit can be a thin film transistor as a switching transistor, one end of the switching transistor is electrically connected with the data wire DL, the other end of the switching transistor is connected with the pixel electrode, and the gate of the switching transistor is connected with the scan wire GL. The peripheral area BB of the array substrate has a first peripheral area B1 in which a source driving chip SIC is bonded, and a second peripheral area B2 in which a gate driving circuit GOA is arranged. The first peripheral area B1 is located at one end of the array substrate in the column direction, and the second peripheral area B2 is located at one end of the array substrate in the row direction. The gate driving circuit GOA is electrically connected with each scan wire GL for loading a scan signal to the scan wire GL to make the switching transistor conductive. The source driving chip SIC is electrically connected with the data wire DL for generating a data voltage according to picture synchronization data and loading the data voltage to the data wire DL.

[0037] In the example of FIG. 2, the number of source drive chips SIC of the liquid crystal display panel is multiple, and each source drive chip SIC can drive multiple data lines DL respectively. Further, the source drive chip SIC is a chip; the array substrate is provided with an FPC (flexible circuit board) binding area and a source drive chip binding area in the first peripheral area B1. The source drive chip SIC can be bound in the source drive chip binding area, and the source drive chip binding area is electrically connected with the data line DL and the FPC binding area through a wire respectively. The FPC binding area can be bound and connected with the driving module through the FPC. In this way, the signal and voltage on the driving module can be transmitted to the source drive chip SIC through the FPC.

[0038] Of course, in other embodiments of the present disclosure, the liquid crystal display panel can also have other structures, for example, the array substrate can not be provided with the gate drive circuit GOA but an additional gate drive circuit board. For another example, the array substrate is provided with the gate drive circuit GOA on both sides in the row direction to reduce the scanning signal voltage drop or increase the scanning frequency. For another example, the source drive chip SIC is provided on both ends of the array substrate in the column direction so as to drive the liquid crystal display panel on both sides, reduce the voltage drop on the data line DL in the large-size liquid crystal display panel, especially reduce the voltage drop on the data line DL in the spliced screen. For another example, the source drive chip SIC can not be provided on the liquid crystal display panel but on the COF (chip on film). The present disclosure does not limit the relative position relationship and setting form between the source drive chip SIC and the liquid crystal display panel, and the source drive chip SIC can directly drive each pixel in the display area of the liquid crystal display panel.

[0039] In the embodiments of the present disclosure, the backlight module is a direct type backlight source. Referring to FIG. 3, the direct type backlight source includes a lamp panel having an array of lamp areas LA, each of which has one or more light emitting elements (e.g., Mini LED or Micro LED) controlled synchronously. Under the control of a driving module, the light emitting brightness of each lamp area can be controlled independently to cooperate with the picture displayed by the liquid crystal display panel, thereby improving the display effect of the display device. In an example, the driving module controls the light emitting brightness of each lamp area by controlling the duty cycle of each light emitting element when emitting light. In an example, the lamp panel can be provided with a microchip MIC, each microchip MIC can control one or more lamp areas, for example, one microchip MIC controls one lamp area or controls four lamp areas. The driving module can send lamp area data of each lamp area to be controlled to each microchip MIC, and the microchip MIC determines the energization time of each lamp area to be controlled according to the lamp area data, thereby controlling the brightness of each lamp area. In other words, the driving module can refresh the brightness of each lamp area by loading the lamp area data to each microchip MIC. Further, the light emitting elements of each lamp area have substantially consistent brightness when emitting light, that is, the current flowing through each light emitting element is substantially consistent.

[0040] In an example, the lamp panel can include a substrate, a driving layer and an element layer arranged in sequence. The driving layer is provided with at least two wiring metal layers, for example, two wiring metal layers containing copper. The wiring metal layers are isolated by an insulating layer, which can be an inorganic insulating layer (e.g., silicon nitride or silicon oxide) or an organic insulating layer (e.g., resin), or a laminated inorganic insulating layer and organic insulating layer. The wiring metal layers can be connected by a via hole penetrating the insulating layer. The surface of the wiring metal layer farthest from the substrate can be formed with a binding pad for binding electronic elements, such as light emitting elements, microchips MIC and sensors.

[0041] In an example, the substrate of the lamp panel can be a glass substrate. Further, the lamp panel can be formed by splicing a plurality of sub-lamp panels with each other; the sub-lamp panels are electrically connected with each other, or each sub-lamp panel is independently controlled by the driving module.

[0042] In an example, each light emitting element has the same light emitting color, for example, all are blue light emitting elements. The lamp panel is further provided with a photoluminescence layer, for example, a quantum dot film, to convert blue light into more uniform white light.

[0043] In some examples, the backlight module can be further provided with one or more of a collimating film, a band-pass filter film, a diffusion sheet, a brightness enhancement film or other optical film materials, which are not limited in the present disclosure.

[0044] It can be understood that the backlight module of the embodiment of the present disclosure can also adopt other structures, for example, a lamp strip is adopted to form a lamp plate, and the present disclosure does not introduce these modes one by one.

[0045] In an embodiment of the present disclosure, referring to FIG. 4, the driving method of the liquid crystal display device comprises:

[0046] In step S110, initial picture data is acquired.

[0047] In step S120, lamp area characteristic values of each lamp area, compensation ratio threshold values of each pixel, and candidate compensation ratios of each pixel are determined according to the initial picture data; wherein in at least part of the gray scale range, the compensation ratio threshold value of the pixel is negatively correlated with the initial gray scale of the pixel.

[0048] In step S130, actual compensation ratios of each pixel are determined according to the compensation ratio threshold value and the candidate compensation ratio of each pixel.

[0049] In step S140, the backlight module is driven according to the lamp area characteristic values of each lamp area, and the liquid crystal display panel is driven according to the actual compensation ratios of each pixel.

[0050] In an example, referring to FIG. 5, the driving module of the liquid crystal display device comprises:

[0051] A data acquisition module UA is configured to acquire initial picture data.

[0052] A correction calculation module UB is configured to determine lamp area characteristic values of each lamp area, compensation ratio threshold values of each pixel, and candidate compensation ratios of each pixel according to the initial picture data; wherein in at least part of the gray scale range, the compensation ratio threshold value of the pixel is negatively correlated with the initial gray scale of the pixel.

[0053] A correction ratio determination module UC is configured to determine actual compensation ratios of each pixel according to the compensation ratio threshold value and the candidate compensation ratio of each pixel.

[0054] A driving module UD is configured to drive the backlight module according to the lamp area characteristic values of each lamp area, and drive the liquid crystal display panel according to the actual compensation ratios of each pixel.

[0055] In the embodiments of the present disclosure, the correction calculation module can determine the compensation multiple threshold of each pixel according to the initial picture data. In a certain gray scale range, the compensation multiple threshold of the pixel is not a fixed value but a variable value negatively correlated with the initial gray scale of the pixel. Compared with the case where the compensation multiple threshold is a fixed value, this can make the pixel have a higher actual compensation multiple at a lower initial gray scale, thereby increasing the range of the actual compensation multiple, enabling the display performance of the liquid crystal display panel to be more fully played, and thereby facilitating the realization of better display effect.

[0056] The driving method and the driving module of the example of the embodiments of the present disclosure will be described below by way of example in conjunction with the accompanying drawings.

[0057] In step S110, initial picture data is acquired.

[0058] In an example, the initial picture data includes the initial gray scale of each sub-pixel of each pixel. The initial gray scale of a pixel can be calculated according to the initial gray scale of each sub-pixel of the pixel. It can be understood that the initial picture data can be image data directly received by the liquid crystal display device or data generated after the liquid crystal display device performs format conversion on the directly received image data.

[0059] In some other embodiments of the present disclosure, the initial picture data can also adopt other formats, such as the HSV format, etc.

[0060] In an example, the driving module is provided with a data acquisition module UA configured to acquire the initial picture data.

[0061] In an embodiment of the present disclosure, step S120 can include steps S210 to S260.

[0062] In step S210, the lamp zone characteristic value of each lamp zone is determined according to the initial picture data.

[0063] In step S220, the backlight characteristic value of each pixel is determined according to the lamp zone characteristic value of each lamp zone.

[0064] In step S230, the basic compensation multiple of each pixel is determined according to the backlight characteristic value of each pixel.

[0065] In step S240, the initial gray scale of each pixel is determined according to the initial picture data.

[0066] In step S250, the gamma compensation multiple of each pixel is determined according to the initial gray scale of each pixel.

[0067] In step S260, the compensation multiple threshold of each pixel is determined according to the initial gray scale of each pixel.

[0068] Step S270, determining the candidate compensation ratio C4 of each pixel according to the base compensation ratio C1 and the gamma compensation ratio C2 of each pixel; wherein C4=C1*C2.

[0069] In an example, the correction calculation module U4 comprises:

[0070] A lamp region feature value determination submodule configured to determine the lamp region feature value of each lamp region according to the initial picture data;

[0071] A backlight feature value determination submodule configured to determine the backlight feature value of each pixel according to the lamp region feature value of each lamp region;

[0072] A base compensation submodule configured to determine the base compensation ratio of each pixel according to the backlight feature value of each pixel;

[0073] A pixel gray scale submodule configured to determine the initial gray scale of each pixel according to the initial picture data; and a gamma adjustment compensation submodule configured to determine the gamma compensation ratio of each pixel according to the initial gray scale of each pixel;

[0074] A compensation threshold submodule configured to determine the compensation ratio threshold of each pixel according to the initial gray scale of each pixel;

[0075] A candidate ratio submodule configured to determine the candidate compensation ratio C4 of each pixel according to the base compensation ratio C1 and the gamma compensation ratio C2 of each pixel; wherein C4=C1*C2.

[0076] The steps S210-S260 are exemplarily described as follows.

[0077] In step S210, the lamp region feature value of each lamp region can be determined according to the initial picture data, and the lamp region feature value of the lamp region is related to the luminous brightness of the light emitting element in the lamp region. The greater the lamp region feature value of the lamp region is, the greater the luminous brightness of the light emitting element in the lamp region is when the backlight module is driven by the driving module. In this embodiment, the lamp region feature value of each lamp region is determined according to the initial gray scale of each pixel or the initial gray scale of each sub-pixel, which can make the backlight intensity provided by each lamp region of the backlight module match the picture displayed by the liquid crystal display panel, realize the local dimming function, and further improve the display effect.

[0078] In an embodiment of the present disclosure, the lamp region feature value of each lamp region can be determined by the following method:

[0079] Step S310, determining the initial lamp region feature value of each lamp region according to the initial picture data;

[0080] Step S320, determining the lamp zone feature value of each lamp zone according to the initial lamp zone feature value of each lamp zone and the filter matrix.

[0081] In one embodiment of the present disclosure, in step S310, the initial lamp zone feature value of each lamp zone can be obtained by using a statistical method. The initial gray scale of each sub-pixel of a pixel can be integrated, and the gray scale result can be taken as the feature value of each pixel. In another embodiment of the present disclosure, the initial gray scale of each sub-pixel can be converted to HSV space (hue, saturation, and lightness space), and the maximum lightness in the lightness of the sub-pixel can be taken as the feature value of the pixel. Of course, in other embodiments of the present disclosure, other processing can be performed on the initial gray scale of the pixel, such as other forms of color space conversion, and other feasible indicators can be used to determine the feature value of the pixel according to the processing result.

[0082] As an example, a liquid crystal display panel includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. Then, the initial gray scale of any one pixel P(i,j) includes the initial gray scale of the red sub-pixel R(i,j)_ori, the initial gray scale of the blue sub-pixel B(i,j)_ori, and the initial gray scale of the green sub-pixel G(i,j)_ori. Wherein, the pixel P(i,j) is the pixel in the i-th row and the j-th column, and i and j are both positive integers; R(i,j)_ori is the initial gray scale of the red sub-pixel of the pixel in the i-th row and the j-th column; G(i,j)_ori is the initial gray scale of the green sub-pixel of the pixel in the i-th row and the j-th column; and B(i,j)_ori is the initial gray scale of the blue sub-pixel of the pixel in the i-th row and the j-th column. Then, the feature value of the pixel P(i,j) is freture(i,j) = f(R(i,j)_ori, G(i,j)_ori, B(i,j)_ori). Wherein, according to the different methods of converting the initial gray scale of the pixel to the feature value of the pixel, the function f() can represent different function functions. For example, in one example, the function f() represents the integration of R(i,j)_ori, G(i,j)_ori, and B(i,j)_ori, and the gray scale result is taken as the feature value of the pixel P(i,j). For another example, in another example, the function f() represents the conversion of the red color represented by R(i,j)_ori, the green color represented by G(i,j)_ori, and the blue color represented by B(i,j)_ori to HSV space, and the maximum lightness is taken as the feature value of the pixel P(i,j).

[0083] In one embodiment of the present disclosure, the initial lamp region feature value of the lamp region can be determined according to the feature value of the pixel. For example, the maximum value of the feature value of each pixel corresponding to the lamp region, the average value of the feature value of each pixel corresponding to the lamp region, the multiple average value of the feature value of each pixel corresponding to the lamp region, or the weighted value of at least two of the above parameters can be selected as the initial lamp region feature value of the lamp region.

[0084] In another embodiment of the present disclosure, the feature value of the pixel can be mapped according to the difference between the bit width of the sub-pixel of the liquid crystal display panel and the bit width of the light source of the backlight module, to obtain a pixel-corrected feature value, so that the bit width of the feature value of the pixel is close to or equal to the bit width of the backlight, and the delicacy of the picture is improved. Then the initial lamp region feature value of the lamp region is determined according to the pixel-corrected feature value. For example, the maximum value of the feature value of each pixel corresponding to the lamp region, the average value of the feature value of each pixel corresponding to the lamp region, the multiple average value of the feature value of each pixel corresponding to the lamp region, or the weighted value of at least two of the above parameters can be selected as the initial lamp region feature value of the lamp region. In the present disclosure, the bit width of the sub-pixel refers to the number of bits of the gray scale data of the sub-pixel, for example, the gray scale data of the sub-pixel needs to be encoded as 8-bit binary code when the gray scale data is in the range of 0-255, and the bit width is 8. The bit width of the backlight refers to the number of bits of the brightness level of the backlight, for example, the brightness level of the backlight needs to be encoded as 13-bit binary code when the brightness level is in the range of 0-255, and the bit width is 13. 13

[0085] In one example, a linear mapping method can be used to map the feature value of the pixel. For example, the pixel-corrected feature value Value(i,j) of the pixel P(i,j) can be calculated as follows: Value(i,j) = freture(i,j) x 2(BLbit-LCDbit). Wherein, BLbit is the bit width of the backlight, and LCDbit is the bit width of the sub-pixel.

[0086] In another example, a non-linear mapping method can be used to map the feature value of the pixel. For example, the pixel-corrected feature value Value(i,j) of the pixel P(i,j) can be calculated as follows: Value(i,j) = freture(i,j) x 2(BLbit-LCDbit) + int(freture(i,j) / 2(2LCDbit-BLbit)).

[0087] Wherein, freture(i,j) is 0-2 LCDbit ​a value in the range of -1, for example, can be the maximum value among R(i,j)_ori, G(i,j)_ori and B(i,j)_ori, or the gray scale value after the integration of R(i,j)_ori, G(i,j)_ori and B(i,j)_ori. The int() function means to round down to the nearest integer. In this example, the value range of the feature value of the pixel correction is wider, which can more effectively utilize the bit width information of the backlight module, and improve the delicacy of the picture.

[0088] In an example, the initial lamp area feature value BLA of a lamp area can be determined by the following formula: BLA = min(W1 x Vmax + W2 x NVavg, 2 BLbit -1). Wherein, the min() function means to return the minimum value in the given parameter table. Vmax is the maximum value among the corrected feature values of the pixels corresponding to the lamp area; Vavg is the average value among the corrected feature values of the pixels corresponding to the lamp area; W1 and W2 are weight coefficients, wherein W1 + W2 = 1. N is a multiple coefficient. Optionally, N is in the range of 2-3, for example, selected from 2 or 3.

[0089] In step S320, the lamp area feature value of each lamp area can be determined according to the initial lamp area feature value of each lamp area and the filter matrix.

[0090] For example, an A1 x A2 filter matrix can be provided, A1 means that the filter matrix has A1 rows of parameters, and A2 means that the filter matrix has A2 rows of parameters. The filter matrix is a weight matrix, and each parameter represents a weight. A1 and A2 can be the same or different. When the initial lamp area feature value of each lamp area and the filter matrix are used for filtering to obtain the lamp area feature value of the lamp area, the A1 x A2 filter matrix is convolved with the initial lamp area feature value. Wherein, in the convolution, the lamp area feature value of each lamp area is the weighted value of the initial lamp area feature values of A1 x A2 lamp areas centered on the lamp area according to the filter matrix.

[0091] Optionally, A1 and A2 are both odd numbers.

[0092] Optionally, A1 and A1 are each independently selected from 3-7, and are both odd numbers.

[0093] In an example, the filter matrix is a 5 x 5 weight matrix.

[0094] In an example, the filter matrix is in the form of the following table:

[0095] In the filter matrix, although there are 25 weight values, each weight value is centrally symmetric and axially symmetric, so the filter matrix has X1, X2, X3 and X4 parameters.

[0096] In an example, the driving module has a weight lookup table storing a filter matrix. When determining the lamp zone characteristic value of the lamp zone according to the initial lamp zone characteristic value of the lamp zone, each parameter in the filter matrix can be called from the weight lookup table.

[0097] In the embodiment of the present disclosure, the initial lamp zone characteristic value of the lamp zone is spatially filtered by using the filter matrix, which can improve the smoothness of the backlight distribution and improve the display effect.

[0098] In an embodiment of the present disclosure, the required filter matrix can be obtained by testing, and then the filter matrix is stored in the driving module.

[0099] In an example, the filter matrix is obtained by the following method:

[0100] According to the picture data of the preset image, the initial lamp zone characteristic value of each lamp zone is determined;

[0101] A candidate filter matrix set is obtained, and the candidate filter matrix set includes a plurality of candidate filter matrices;

[0102] The fitting score of each candidate filter matrix in the candidate filter matrix set is obtained, and the candidate filter matrix with the largest fitting score is taken as the target filter matrix;

[0103] The fitting score of any one candidate filter matrix is obtained by the following method:

[0104] According to the candidate filter matrix and the initial lamp zone characteristic value of each lamp zone, the current lamp zone characteristic value of each lamp zone is determined;

[0105] [According to the amendment of Rule 26, 28.10.2025] The fitting score PSNR of the candidate filter matrix is determined according to the following formula:

[0106] Wherein, the I max is the maximum value of the lamp zone characteristic value;

[0107] ΔI(i,j) represents the difference between the current lamp zone characteristic value and the initial lamp zone characteristic value of the lamp zone in the i-th row and j-th column; M is the total number of rows of lamp zones of the backlight module, and N represents the total number of columns of lamp zones of the backlight module.

[0108] In another embodiment of the present disclosure, the filter matrix is obtained by the following method:

[0109] determine initial lamp region characteristic values of the lamp regions according to the picture data of the preset image;

[0110] obtain an initial filter matrix and take the initial filter matrix as a current filter matrix;

[0111] perform a filter optimization loop until a termination condition is reached; the filter optimization loop comprises:

[0112] determine current lamp region characteristic values of the lamp regions according to the current filter matrix and the initial lamp region characteristic values of the lamp regions;

[0113] [According to Rule 26 Correction 28.10.2025] The fitting score PSNR of the current filter matrix is determined according to the following formula:

[0114] wherein, the I max is the maximum value of the lamp region characteristic values;

[0115] ΔI(i,j) represents the difference between the current lamp region characteristic value and the initial lamp region characteristic value of the lamp region in the ith row and the jth column; M is the total number of rows of lamp regions of the backlight module, and N represents the total number of columns of lamp regions of the backlight module;

[0116] determine whether the fitting score reaches a preset value;

[0117] when the fitting score does not reach the preset value, update the current filter matrix;

[0118] wherein, the termination condition of the filter optimization loop is that the fitting score reaches the preset value;

[0119] take the current filter matrix as a target filter matrix.

[0120] FIG. 6-2 is a diagram showing the change of the light intensity distribution in a lamp region when the initial lamp region characteristic values of the lamp regions are not filtered by a filter matrix. In this case, the initial lamp region characteristic values of the lamp regions are directly taken as the lamp region characteristic values of the lamp regions. In FIG. 6-2, the abscissa represents different positions in the lamp region, and the ordinate represents the light intensity related parameters. According to FIG. 6-2, it can be seen that when the initial lamp region characteristic values of the lamp regions are not filtered by a filter matrix, the uniformity of the brightness distribution in the lamp region is very poor.

[0121] Fig. 6-1 is a light intensity distribution in a lamp region when the initial lamp region eigenvalue of the lamp region is filtered by a filter matrix. In this case, the initial lamp region eigenvalue of the lamp region is filtered by the filter matrix to form the lamp region eigenvalue of the lamp region. Wherein, L3 is the original curve of the light intensity distribution in the lamp region, and L4 is the fitted curve of the light intensity distribution in the lamp region. In Fig. 6-1, the abscissa represents different positions in the lamp region, and the ordinate represents the light intensity related parameters. As can be seen from Fig. 6-1, when the initial lamp region eigenvalue of the lamp region is filtered by the filter matrix, the uniformity of the light intensity distribution in the lamp region is obviously improved.

[0122] As described above, the backlight data (lamp region eigenvalue of each lamp region) is determined according to the data of the initial picture (initial gray scale of each sub-pixel) or the initial gray scale of the pixel. However, the backlight data is determined according to the distribution of each lamp region, and has a small resolution; it needs to be expanded to the pixel scale of the screen, i.e. to obtain the backlight diffusion map.

[0123] In step S220, the backlight eigenvalue of each pixel can be determined according to the lamp region eigenvalue of each lamp region.

[0124] In an example, referring to Fig. 7, the backlight eigenvalue of any pixel can be determined by the following method:

[0125] Determine the influence lamp region of the pixel, which includes the center lamp region and the surrounding lamp region. The center lamp region is the lamp region corresponding to the pixel, and the surrounding lamp region is the lamp region within a predetermined range around the center lamp region.

[0126] Determine the relative position relationship between the pixel and the center of each influence lamp region.

[0127] According to the relative position relationship between the pixel and the center of each influence lamp region, determine the influence weight of each influence lamp region on the pixel.

[0128] According to the lamp region eigenvalue of each influence lamp region and the influence weight of each influence lamp region on the pixel, determine the backlight eigenvalue of the pixel.

[0129] In the example of Fig. 7, the dot at the convergence of the line segments represents a pixel, and the lamp region where the pixel is located is the center lamp region of the pixel. The 5x5 lamp regions centered on the center lamp region are the influence lamp regions of the pixel. The center of each lamp region is marked with an origin, and then the distance (i.e. the relative position) between the pixel and the center of each influence lamp region can be calculated.

[0130] In an example, the relative position relationship between the pixel and the center of each influencing lamp region can refer to the number of pixel rows and the number of pixel columns between the pixel and the center of the influencing lamp region. In other words, the relative position relationship between the pixel and the center of the influencing lamp region is determined in units of pixels, which facilitates determining the influence weight of each influencing lamp region on the pixel through the lookup table.

[0131] In an example, the influence weight of the influencing lamp region of the pixel can be looked up in the diffusion weight lookup table through the relative position relationship between the pixel and the center of the influencing lamp region.

[0132] [According to Rule 26 Correction 28.10.2025] In an example, the influencing lamp regions of the pixel are B1x B2 lamp regions around the pixel. The backlight feature value of the pixel can be calculated using the following formula:

[0133] wherein Blpix represents the backlight feature value of the pixel; Weight(i, j) is the influence weight of the i-th row and j-th column influencing lamp region on the pixel; and BL(i, j) is the lamp region feature value of the i-th row and j-th column influencing lamp region.

[0134] In the example of FIG. 7, the green dot represents a pixel, the lamp region in which the pixel is located is the center lamp region of the pixel, and the 5x5 lamp regions centered on the center lamp region are the influencing lamp regions of the pixel. The center of each lamp region is marked with a red dot, and the distance between the pixel and the center of each influencing lamp region can be calculated.

[0135] In an example, the parameters of the diffusion weight lookup table can be determined through a light type diffusion test. For example, in order to ensure the accuracy of the data, the light emitting elements of the five lamp regions close to the middle, the upper left, the upper right, the lower left, and the lower right are respectively lit, and an optical acquisition element (such as CA2000) is used to take a picture to obtain the diffusion distance and diffusion intensity of a sub-division lamp. The acquisition result is shown in FIG. 8.

[0136] Then, ten groups of data of the luminance change with distance in the horizontal direction (row direction) and the vertical direction (column direction) are respectively obtained by software, the invalid luminance data is removed, and the valid luminance data is retained. In order to eliminate random errors, the arithmetic mean of each five groups of data in the two directions is taken. Referring to FIG. 9, according to the data, the light diffusion range is B1x B2 lamp regions (5x7 lamp regions in the example of FIG. 9, wherein the middle lamp region has four light emitting elements represented by blue squares) when one lamp region is lit, that is, B2 lamp regions are diffused in the horizontal direction, and B1 lamp regions are diffused in the vertical direction.

[0137] The light pattern data in the B1x B2 partition is selected for interception to keep the data in the B1x B2 partition, so as to reduce the hardware storage capacity. Then, the obtained data is resampled, normalized and smoothed. In the resampling, the resampling can be performed in pixel units.

[0138] In the resampling operation, the physical scale in the original data needs to be converted into the pixel scale of the used screen. Taking a 31.5-inch ultra-high-definition screen as an example, the resampling is performed in a pixel 0.18159 mm unit. The light pattern data obtained in the pixel unit is also used in the following light pattern calculation. In this way, the luminance of the light-emitting element of a lamp area on the corresponding screen can be restored in a pixel-to-pixel correspondence manner.

[0139] In step S230, the base compensation factor of each pixel is determined according to the backlight feature value of each pixel. In step S230, the base compensation factor is the compensation factor when the gamma value of the picture is not adjusted.

[0140] In an example, determining the base compensation factor of any one of the pixels includes:

[0141] Determining the base compensation factor of the pixel according to the backlight feature value of the pixel and a first lookup table;

[0142] The first lookup table has a plurality of base compensation factors corresponding to different backlight feature values, and the backlight feature value and the corresponding base compensation factor C1 satisfy the following relationship:

[0143] Bl max is the maximum value of the backlight feature value; Bl pix is the backlight feature value of the pixel; and γ is the encoding gamma value of the initial picture.

[0144] For example, when the backlight feature value of the pixel is encoded by 8 bits, the value of Bl max is 255. For another example, when the backlight feature value of the pixel is encoded by 10 bits, the value of Bl max is 1023.

[0145] In other words, the gamma value of the picture compensated by the base compensation factor is consistent with the gamma of the initial picture, for example, both are 2.2.

[0146] In an example, the base compensation submodule has a first register for storing each base compensation factor of the first lookup table.

[0147] In the initial picture, the target brightness of a pixel can be determined according to the following formula:

[0148] Wherein, L(goal) is the target brightness of the pixel, G ori is the initial gray scale of the pixel; G max is the maximum gray scale of the pixel; γ1 is the encoding gamma value of the initial picture.

[0149] In consideration of the backlight characteristic value of the pixel, the brightness of a pixel can be determined according to the following formula:

[0150] Wherein, L(LCD) is the actual brightness of the pixel, G com is the actual gray scale of the pixel; G max is the maximum gray scale of the pixel; γ2 is the screen gamma value of the liquid crystal display panel. Bl pix is the backlight characteristic value of the pixel; Bl max is the maximum value of the backlight characteristic value.

[0151] Without considering the change of the gamma value, it can be considered that γ1 = γ2; at this time, in order to make L(goal) = L(LCD), it is required to make:

[0152] Basic compensation ratio

[0153] In step S250, the gamma compensation ratio of each pixel can be determined according to the initial gray scale of each pixel. In one example, the determination of the gamma compensation ratio of any one of the pixels comprises:

[0154] determining the gamma compensation ratio of the pixel according to the initial gray scale of the pixel and a second lookup table;

[0155] Wherein, the second lookup table has the gamma compensation ratios corresponding to the initial gray scales of a plurality of different pixels, and the initial gray scale of the pixel and the corresponding gamma compensation ratio C2 satisfy the following relationship:

[0156] C2 = G max 1-γ1 / γ2 *G ori γ1 / γ2-1

[0157] Wherein, G max is the maximum gray scale value of the pixel; G ori is the initial gray scale of the pixel; γ1 is the encoding gamma value of the initial picture; γ2 is the screen gamma value of the liquid crystal display panel.

[0158] In an example, the gamma adjustment compensation submodule has a second register for storing each gamma compensation multiplier C2 of the second lookup table.

[0159] In this embodiment, when the gamma value needs to be adjusted, for example, the screen gamma value and the encoding gamma value of the initial picture are inconsistent, it is required to make:

[0160] At this time: C2=G com / G ori = G max 1-γ1 / γ2 *G ori γ1 / γ2-1

[0161] In an embodiment of the present disclosure, when the screen gamma value and the encoding gamma value of the initial picture are inconsistent, the candidate compensation multiplier C4 of each pixel can be determined based on the base compensation multiplier C1 and the gamma compensation multiplier C2 of each pixel; wherein C4=C1*C2. When the initial gray scale of the pixel is compensated by using the candidate compensation multiplier, the compensation for the gamma adjustment and the compensation for the backlight change can be considered at the same time.

[0162] In another embodiment of the present disclosure, the screen gamma value and the encoding gamma value of the initial picture are consistent, so there is no need to compensate for the gamma change. At this time, the candidate compensation multiplier of the pixel can be made equal to the base compensation multiplier.

[0163] In this embodiment, the driving method does not need to determine the gamma compensation multiplier of each pixel according to the initial gray scale of each pixel, nor does it need to determine the candidate compensation multiplier C4 of each pixel according to the base compensation multiplier C1 and the gamma compensation multiplier C2 of each pixel. Similarly, the correction calculation module does not need to have a gamma adjustment compensation submodule and a candidate multiplier submodule.

[0164] In the process of pixel compensation, it is sometimes found that a high gray scale pixel is used with a very high compensation multiplier because it is in a low backlight state, causing the gray scale of some pixels to exceed the maximum limit, which will lead to the loss of high gray scale details in dark scenes. Therefore, the maximum value of the compensation multiplier needs to be limited according to the gray scale size of the pixel.

[0165] In step S260, the compensation multiplier threshold of each pixel can be determined according to the initial gray scale of each pixel. In an example, determining the compensation multiplier threshold of any one of the pixels comprises:

[0166] determining the compensation multiplier threshold of the pixel according to the initial gray scale of the pixel and a third lookup table;

[0167] The third lookup table has a plurality of compensation multiple thresholds corresponding to initial gray scales of different pixels, and the initial gray scale of the pixel and the corresponding compensation multiple threshold C3 satisfy the following relationship:

[0168] G ori is the initial gray scale of the pixel; β is a first preset parameter, and 1≤β≤G max ; G max is the maximum gray scale value of the pixel; and α is a second preset parameter, and 0<α<1.

[0169] The first preset parameter and the second preset parameter in the above formula can be determined according to actual tests.

[0170] FIG. 10 is a curve of the compensation multiple threshold changing with the initial gray scale of the pixel. Referring to FIG. 10, at least in a small gray scale range, the compensation multiple threshold increases with the increase of the initial gray scale.

[0171] In this embodiment, the compensation multiple threshold of the pixel can be determined only according to the initial gray scale of the pixel, which can greatly reduce the operation amount required for calculating the compensation multiple threshold, and further reduce the cost.

[0172] In an example, the first preset parameter can be determined by the following method:

[0173] Play the 0-255 gray scale transition picture in the 10% window, and calculate the power consumption curve. Calculate the gray scale value of the picture displayed when the power reaches 90% of the maximum power in the power consumption curve, and record the gray scale value as the first preset parameter. Of course, other methods can also be used to obtain the first preset parameter. For example, calculate the gray scale value of the picture displayed when the power reaches 85%, 86%, 87%, 88%, 89%, 91%, 92%, 93%, 94%, 95% of the maximum power in the power consumption curve, and take the gray scale value as the first preset parameter. In an example, when the maximum gray scale is 255, the first preset parameter is in the range of 130-190, for example, 155.

[0174] In an example, the screen gamma of the liquid crystal display panel can be determined by the following method, and the reciprocal value of the screen gamma is taken as the second preset parameter:

[0175] Play the 0-255 gray scale transition picture in the full-screen window, and measure the screen gamma of the screen system.

[0176] In the present disclosure, the actual gray scale of a pixel, i.e. the compensated gray scale, can be obtained by a variety of different means. For example, the luminance data of a pixel displayed by a single liquid crystal display panel can be obtained, the video stream data can be captured from a video output interface, or the video data can be directed to a common liquid crystal display panel.

[0177] In one embodiment of the present disclosure, for a liquid crystal display device, the luminance of a specific region in a specific picture can be measured, the video stream data captured from a video output interface can be measured, or the luminance curve of the display data from 0 gray scale to 255 gray scale in a common liquid crystal display panel after pixel compensation can be measured. Then a power function model is used to fit the first preset parameter and the second preset parameter. If the fitting is successful, the liquid crystal display device has the possibility of using the driving method of the present application.

[0178] In one embodiment of the present disclosure, for a liquid crystal display device, a smaller screen window can be used for testing according to the screen partition condition. For example, a 30*30 pixel square can be used for 0-255 transition picture testing in a 60*60 pixel partition. Then a power function model is used to fit the first preset parameter and the second preset parameter. If the fitting is successful, the liquid crystal display device has the possibility of using the driving method of the present application.

[0179] In one embodiment of the present disclosure, determining the actual compensation ratio of any one pixel comprises:

[0180] In the compensation ratio threshold value and the candidate compensation ratio, the smaller value is selected as the actual compensation ratio of the pixel. In this way, it can be ensured that the actual gray scale value of the pixel will not appear color deviation or missing due to exceeding the maximum value.

[0181] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the present application cover any and all variations of the present disclosure that come within the scope of the claims and their equivalents. It is intended that the specification and examples be considered exemplary only, with the true scope and spirit of the application being indicated by the following claims.

Claims

1. A driving method for a liquid crystal display device, wherein, The liquid crystal display device includes a liquid crystal display panel and a backlight module; The backlight module includes multiple lamp zones, and the liquid crystal display panel includes multiple pixels distributed in an array. The driving method of the liquid crystal display device includes: Obtain initial screen data; The light area feature value of each light area and the compensation ratio threshold and candidate compensation ratio of each pixel are determined based on the initial image data; wherein, in at least a portion of the grayscale range, the compensation ratio threshold of the pixel is negatively correlated with the initial grayscale of the pixel. The actual compensation ratio of each pixel is determined based on the compensation ratio threshold and candidate compensation ratio for each pixel. The backlight module is driven according to the characteristic values ​​of each of the light zones, and the liquid crystal display panel is driven according to the actual compensation ratio of each of the pixels.

2. The driving method for a liquid crystal display device according to claim 1, wherein, Based on the initial image data, determine the feature values ​​of each light area and the compensation ratio threshold for each pixel, including the candidate compensation ratio for each pixel: Determine the characteristic values ​​of each light zone based on the initial image data; The backlight feature value of each pixel is determined based on the feature value of each of the light areas; The base compensation ratio of each pixel is determined based on the backlight feature value of each pixel; The initial grayscale of each pixel is determined based on the initial image data; The gamma compensation ratio and compensation ratio threshold of each pixel are determined based on the initial gray level of each pixel. The candidate compensation ratio C4 for each pixel is determined based on the base compensation ratio C1 and the gamma compensation ratio C2 for each pixel; where C4 = C1 * C2.

3. The driving method for a liquid crystal display device according to claim 1, wherein, Based on the initial image data, determine the feature values ​​of each light area and the compensation ratio threshold for each pixel, including the candidate compensation ratio for each pixel: Determine the characteristic values ​​of each light zone based on the initial image data; The backlight feature value of each pixel is determined based on the feature value of each of the light areas; The base compensation ratio of each pixel is determined based on the backlight feature value of each pixel, and the base compensation ratio of the pixel is used as the candidate compensation ratio of the pixel. The initial grayscale of each pixel is determined based on the initial image data; the compensation ratio threshold of each pixel is determined based on the initial grayscale of each pixel.

4. The driving method for the liquid crystal display device according to claim 2 or 3, wherein, Determining the base compensation ratio for any one of the pixels includes: The base compensation ratio of the pixel is determined based on the backlight feature value of the pixel and the first lookup table; The first lookup table has multiple base compensation ratios corresponding to different backlight feature values, and the backlight feature values ​​and their corresponding base compensation ratios C1 satisfy the following relationship: Among them, Bl max The maximum value of the backlight characteristic value; Bl pix γ is the backlight feature value of the pixel; γ is the encoded gamma value of the initial image.

5. The driving method for the liquid crystal display device according to claim 2 or 3, wherein, Determining the compensation ratio threshold for any one of the pixels includes: The compensation ratio threshold of the pixel is determined based on the initial gray level of the pixel and the third lookup table; The third lookup table has multiple compensation ratio thresholds corresponding to the initial gray levels of different pixels, and the initial gray level of the pixel and the corresponding compensation ratio threshold C3 satisfy the following relationship: Among them, G ori β is the initial gray level of the pixel; β is the first preset parameter, and 1≤β≤G max G max α is the maximum grayscale value of the pixel; α is the second preset parameter, and 0 < α < 1.

6. The driving method for a liquid crystal display device according to claim 2, wherein, Determining the gamma compensation ratio for any one of the pixels includes: The gamma compensation ratio of the pixel is determined based on the initial gray level of the pixel and the second lookup table; The second lookup table contains gamma compensation ratios corresponding to the initial gray levels of multiple pixels, and the initial gray level of the pixel and the corresponding gamma compensation ratio C2 satisfy the following relationship: C2 = G max 1-γ1 / γ2 *G ori γ1 / γ2-1 Among them, G max G is the maximum grayscale value of a pixel. ori γ1 is the initial grayscale of the pixel; γ2 is the encoded gamma value of the initial image; γ3 is the screen gamma value of the liquid crystal display panel.

7. The driving method for a liquid crystal display device according to claim 1, wherein, Determining the actual compensation ratio for any pixel includes: Between the compensation ratio threshold and the candidate compensation ratio, the smaller value is selected as the actual compensation ratio for the pixel.

8. The driving method for the liquid crystal display device according to claim 2 or 3, wherein, Determining the backlight feature value of any one of the pixels includes: The influence area of ​​the pixel is determined, and the influence area of ​​the pixel includes a central light area and a peripheral light area. The central light area is the light area corresponding to the pixel, and the peripheral light area is the light area within a preset range around the central light area. Determine the relative positional relationship between the pixel and the center of each influencing light area; The influence weight of each influence light area on the pixel is determined based on the relative positional relationship between the pixel and the center of each influence light area. The backlight feature value of the pixel is determined based on the feature value of each of the influencing light areas and the influence weight of each of the influencing light areas on the pixel.

9. [Amended according to Rule 26, 28.10.2025] The driving method for the liquid crystal display device according to claim 2 or 3, wherein, Determining the lamp area feature values ​​of each lamp area based on the initial gray level of each pixel includes: Determine the initial light zone characteristic values ​​for each light zone based on the initial image data; The characteristic values ​​of each light zone are determined based on the initial characteristic values ​​and filtering matrix of each light zone. The filtering matrix is ​​obtained using the following method: The initial feature values ​​of each light zone are determined based on the image data of the preset image. Obtain a candidate filter matrix set, which includes multiple candidate filter matrices; Obtain the fitting score of each candidate filter matrix in the candidate filter matrix set, and take the candidate filter matrix with the largest fitting score as the target filter matrix; The fitting score for any candidate filter matrix is ​​obtained using the following method: Based on the candidate filter matrix and the initial feature values ​​of each light zone, the current feature values ​​of each light zone are determined. The PSNR (Power Score) of the candidate filter matrix is ​​determined using the following formula: Wherein, the I max This represents the maximum value of the characteristic value of the light zone; ΔI(i,j) represents the difference between the current feature value and the initial feature value of the light area in the i-th row and j-th column; M is the total number of rows of the backlight module, and N is the total number of columns of the backlight module.

10. [Amended according to Rule 26, 28.10.2025] The driving method for the liquid crystal display device according to claim 2 or 3, wherein, Determining the lamp area feature values ​​of each lamp area based on the initial gray level of each pixel includes: The initial feature value of each light area is determined based on the initial gray level of each pixel. The characteristic values ​​of each light zone are determined based on the initial characteristic values ​​and filtering matrix of each light zone. The filtering matrix is ​​obtained using the following method: The initial feature values ​​of each light zone are determined based on the image data of the preset image. Obtain the initial filter matrix and use it as the current filter matrix; Execute the filter optimization loop until the termination condition is met; the filter optimization loop includes: Based on the current filtering matrix and the initial feature values ​​of each light zone, determine the current feature values ​​of each light zone; The PSNR (Power Score) of the current filter matrix is ​​determined using the following formula: Wherein, the I max This represents the maximum value of the characteristic value of the light zone; ΔI(i,j) represents the difference between the current feature value and the initial feature value of the light area in the i-th row and j-th column; M is the total number of rows of the backlight module, and N is the total number of columns of the backlight module. Determine whether the fitting score has reached a preset value; When the fitting score does not reach the preset value, the current filtering matrix is ​​updated; The termination condition of the filter optimization loop is: the fitting score reaches the preset value; and the current filter matrix is ​​used as the target filter matrix.

11. A driving module for a liquid crystal display device, wherein, The liquid crystal display device further includes a liquid crystal display panel and a backlight module; The backlight module includes multiple lamp zones, and the liquid crystal display panel includes multiple pixels distributed in an array. The driving module of the liquid crystal display device includes: The data acquisition module is configured to acquire initial screen data; The correction calculation module is configured to determine the light area feature value of each light area and the compensation ratio threshold and candidate compensation ratio of each pixel based on the initial image data; wherein, in at least a portion of the grayscale range, the compensation ratio threshold of the pixel is negatively correlated with the initial grayscale of the pixel. The correction magnification determination module is configured to determine the actual compensation magnification of each pixel based on the compensation magnification threshold and candidate compensation magnification of each pixel. The driving module is configured to drive the backlight module according to the lamp area feature values ​​of each of the lamp areas, and drive the liquid crystal display panel according to the actual compensation ratio of each of the pixels.

12. The driving module of the liquid crystal display device according to claim 11, wherein, The correction calculation module includes: The light zone feature value determination submodule is configured to determine the light zone feature value of each light zone based on the initial screen data; The backlight feature value determination submodule is configured to determine the backlight feature value of each pixel based on the lamp area feature value of each lamp area; The basic compensation submodule is configured to determine the basic compensation ratio of each pixel based on the backlight feature value of each pixel; The pixel grayscale submodule is configured to determine the initial grayscale of each pixel based on the initial image data. The gamma adjustment compensation submodule is configured to determine the gamma compensation ratio of each pixel based on the initial grayscale of each pixel. The compensation threshold submodule is configured to determine the compensation ratio threshold for each pixel based on the initial grayscale of each pixel. The candidate compensation ratio submodule is configured to determine the candidate compensation ratio C4 for each pixel based on the base compensation ratio C1 and the gamma compensation ratio C2 for each pixel; where C4 = C1 * C2.

13. The driving module of the liquid crystal display device according to claim 11, wherein, The correction calculation module includes: The light zone feature value determination submodule is configured to determine the initial grayscale of each pixel based on the initial image data; and to determine the light zone feature value of each of the light zones. The backlight feature value determination submodule is configured to determine the backlight feature value of each pixel based on the lamp area feature value of each lamp area; The basic compensation submodule is configured to determine the basic compensation ratio of each pixel based on the backlight feature value of each pixel, and use the basic compensation ratio of the pixel as the candidate compensation ratio of the pixel. The pixel grayscale submodule is configured to determine the initial grayscale of each pixel based on the initial image data; the compensation threshold submodule is configured to determine the compensation ratio threshold of each pixel based on the initial grayscale of each pixel.

14. The driving module of the liquid crystal display device according to claim 12 or 13, wherein, The basic compensation submodule is configured to determine the basic compensation multiplier for any pixel using the following method: The base compensation ratio of the pixel is determined based on the backlight feature value of the pixel and the first lookup table; The first lookup table has multiple base compensation ratios corresponding to different backlight feature values, and the backlight feature values ​​and their corresponding base compensation ratios C1 satisfy the following relationship: Among them, Bl max The maximum value of the backlight characteristic value; Bl pix γ is the backlight feature value of the pixel; γ is the encoded gamma value of the initial image.

15. The driving module of the liquid crystal display device according to claim 12 or 13, wherein, The compensation threshold submodule determines the compensation multiplier threshold for any pixel using the following method: The compensation ratio threshold of the pixel is determined based on the initial gray level of the pixel and the third lookup table; The third lookup table has multiple compensation ratio thresholds corresponding to the initial gray levels of different pixels, and the initial gray level of the pixel and the corresponding compensation ratio threshold C3 satisfy the following relationship: Among them, G ori β is the initial gray level of the pixel; β is the first preset parameter, and 1≤β≤G max G max α is the maximum grayscale value of the pixel; α is the second preset parameter, and 0 < α < 1.

16. The driving module of the liquid crystal display device according to claim 12, wherein, The gamma adjustment compensation submodule determines the gamma compensation ratio for any pixel using the following method: The gamma compensation ratio of the pixel is determined based on the initial gray level of the pixel and the second lookup table; The second lookup table contains gamma compensation ratios corresponding to the initial gray levels of multiple pixels, and the initial gray level of the pixel and the corresponding gamma compensation ratio C2 satisfy the following relationship: C2 = G max 1-γ1 / γ2 *G ori γ1 / γ2-1 Among them, G max G is the maximum grayscale value of a pixel. ori γ1 is the initial grayscale of the pixel; γ2 is the encoded gamma value of the initial image; γ3 is the screen gamma value of the liquid crystal display panel.

17. The driving module of the liquid crystal display device according to claim 11, wherein, The correction magnification determination module determines the actual compensation magnification of any pixel using the following method: Between the compensation ratio threshold and the candidate compensation ratio, the smaller value is selected as the actual compensation ratio for the pixel.

18. The driving module of the liquid crystal display device according to claim 12 or 13, wherein, The backlight feature value determination submodule determines the backlight feature value of any one of the pixels using the following method: The influence area of ​​the pixel is determined, and the influence area of ​​the pixel includes a central light area and a peripheral light area. The central light area is the light area corresponding to the pixel, and the peripheral light area is the light area within a preset range around the central light area. Determine the relative positional relationship between the pixel and the center of each influencing light area; The influence weight of each influence light area on the pixel is determined based on the relative positional relationship between the pixel and the center of each influence light area. The backlight feature value of the pixel is determined based on the feature value of each of the influencing light areas and the influence weight of each of the influencing light areas on the pixel.

19. [Amended according to Rule 26, 28.10.2025] The driving module of the liquid crystal display device according to claim 12 or 13, wherein, The light area feature value determination submodule is configured to determine the light area feature value of each light area based on the initial gray level of each pixel using the following method: Determine the initial light zone characteristic values ​​for each light zone based on the initial image data; The characteristic values ​​of each light zone are determined based on the initial characteristic values ​​and filtering matrix of each light zone. The filtering matrix is ​​obtained using the following method: The initial feature values ​​of each light zone are determined based on the image data of the preset image. Obtain a candidate filter matrix set, which includes multiple candidate filter matrices; Obtain the fitting score of each candidate filter matrix in the candidate filter matrix set, and take the candidate filter matrix with the largest fitting score as the target filter matrix; The fitting score for any candidate filter matrix is ​​obtained using the following method: Based on the candidate filter matrix and the initial feature values ​​of each light zone, the current feature values ​​of each light zone are determined. The PSNR (Power Score) of the candidate filter matrix is ​​determined using the following formula: Wherein, the I max This represents the maximum value of the characteristic value of the light zone; ΔI(i,j) represents the difference between the current feature value and the initial feature value of the light area in the i-th row and j-th column; M is the total number of rows of the backlight module, and N is the total number of columns of the backlight module.

20. [Amended according to Rule 26, 28.10.2025] The driving module of the liquid crystal display device according to claim 12 or 13, wherein, The light area feature value determination submodule is configured to determine the light area feature value of each light area based on the initial gray level of each pixel using the following method: The initial feature value of each light area is determined based on the initial gray level of each pixel. The characteristic values ​​of each light zone are determined based on the initial characteristic values ​​and filtering matrix of each light zone. The filtering matrix is ​​obtained using the following method: The initial feature values ​​of each light zone are determined based on the image data of the preset image. Obtain the initial filter matrix and use it as the current filter matrix; Execute the filter optimization loop until the termination condition is met; the filter optimization loop includes: Based on the current filtering matrix and the initial feature values ​​of each light zone, determine the current feature values ​​of each light zone; The PSNR (Power Score) of the current filter matrix is ​​determined using the following formula: Wherein, the I max This represents the maximum value of the characteristic value of the light zone; ΔI(i,j) represents the difference between the current feature value and the initial feature value of the light area in the i-th row and j-th column; M is the total number of rows of the backlight module, and N is the total number of columns of the backlight module. Determine whether the fitting score has reached a preset value; When the fitting score does not reach the preset value, the current filtering matrix is ​​updated; The termination condition of the filter optimization loop is: the fitting score reaches the preset value; and the current filter matrix is ​​used as the target filter matrix.

21. A liquid crystal display device, comprising the driving module according to any one of claims 11 to 20.

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