Backlight control method and display device

Abstract

This application relates to a backlight control method and display device, comprising: acquiring first image data of a currently displayed sub-frame and second image data of a sub-frame to be displayed; determining, based on the pixel difference between the first image data and the second image data, the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the sub-frame to be displayed displayed on the liquid crystal panel; determining backlight enabling parameters of the backlight module based on the proportion of steady-state duration of liquid crystal molecules, wherein the backlight enabling parameters of the backlight module are positively correlated with the proportion of steady-state duration of liquid crystal molecules; determining, according to the backlight enabling parameters of the backlight module and the backlight data of the sub-frame to be displayed, the DC current and the proportion of light emission duration of each light-emitting device in the backlight module; and driving and controlling the backlight module based on the backlight enabling parameters of the backlight module, the DC current and the proportion of light emission duration of each light-emitting device in the backlight module. This method can improve display quality.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a backlight control method and display device. Background Technology

[0002] With the rapid development of display technology, the market's requirements for color performance and power consumption control of display products continue to increase. In LCD products, the use of RGB backlight architecture can broaden the color gamut and improve the brightness of light output, making it suitable for color field-sequential display (or field-sequential display) application scenarios. This display architecture does not require the placement of color filters, which can effectively improve the light transmittance of the display module and reduce the overall power consumption, thus possessing good industrial application value.

[0003] However, the related technologies still suffer from poor display quality in field sequence display applications. Summary of the Invention

[0004] Therefore, it is necessary to provide a display device and backlight control method that can improve display quality in response to the above-mentioned technical problems.

[0005] In a first aspect, this application provides a display device, comprising:

[0006] The LCD panel is configured to sequentially display images corresponding to multiple subframes within a single frame image cycle;

[0007] Backlight module;

[0008] The backlight driver module is configured as follows:

[0009] Acquire the first image data of the currently displayed subframe, the second image data of the subframe to be displayed, and the backlight data of the subframe to be displayed;

[0010] Based on the pixel difference between the first image data and the second image data, the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the sub-frame to be displayed displayed by the liquid crystal panel is determined, wherein the proportion of steady-state duration of liquid crystal molecules is characterized as the ratio of the duration of the liquid crystal molecules in a steady state to the display period of the sub-frame.

[0011] The backlight enabling parameters of the backlight module are determined based on the proportion of the steady-state duration of the liquid crystal molecules. The backlight enabling parameters of the backlight module are positively correlated with the proportion of the steady-state duration of the liquid crystal molecules. The backlight enabling parameters are characterized as the ratio of the backlight enabling duration to the display period of the sub-frame.

[0012] Based on the backlight enable parameters of the backlight module and the backlight data of the subframe to be displayed, the DC current and the proportion of light emission duration of each light-emitting device in the backlight module are determined. The proportion of light emission duration is characterized as the ratio of the total light emission duration of the light-emitting devices to the duration characterized by the backlight enable parameters of the backlight module.

[0013] Based on the backlight enable parameters of the backlight module, the DC current and emission duration ratio of each light-emitting device in the backlight module, the backlight module is driven and controlled to provide the backlight required to display the sub-frame to be displayed.

[0014] Based on the same inventive concept, in a second aspect, this application also provides a backlight control method applied to a display device, the display device including a liquid crystal panel and a backlight module, the liquid crystal panel being configured to sequentially display images corresponding to multiple sub-frames within a single frame image period, characterized in that the method includes:

[0015] Acquire the first image data of the currently displayed subframe, the second image data of the subframe to be displayed, and the backlight data of the subframe to be displayed;

[0016] Based on the pixel difference between the first image data and the second image data, the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the sub-frame to be displayed displayed by the liquid crystal panel is determined, wherein the proportion of steady-state duration of liquid crystal molecules is characterized as the ratio of the duration of the liquid crystal molecules in a steady state to the display period of the sub-frame.

[0017] The backlight enabling parameters of the backlight module are determined based on the proportion of the steady-state duration of the liquid crystal molecules. The backlight enabling parameters of the backlight module are positively correlated with the proportion of the steady-state duration of the liquid crystal molecules. The backlight enabling parameters are characterized as the ratio of the backlight enabling duration to the display period of the sub-frame.

[0018] Based on the backlight enable parameters of the backlight module and the backlight data of the subframe to be displayed, the DC current and the proportion of light emission duration of each light-emitting device in the backlight module are determined. The proportion of light emission duration is characterized as the ratio of the total light emission duration of the light-emitting devices to the duration characterized by the backlight enable parameters of the backlight module.

[0019] Based on the backlight enable parameters of the backlight module, the DC current and emission duration ratio of each light-emitting device in the backlight module, the backlight module is driven and controlled to provide the backlight required to display the sub-frame to be displayed.

[0020] The aforementioned display device and backlight control method first determine the proportion of steady-state duration of liquid crystal molecules corresponding to the image data of the currently displayed subframe and the image data of the subframe to be displayed (hereinafter referred to as the steady-state duration proportion of liquid crystal molecules in the liquid crystal panel) based on the pixel difference between the image data of the current display subframe and the image data of the subframe to be displayed. The steady-state duration proportion of liquid crystal molecules is characterized by the ratio of the duration of liquid crystal molecules in a steady state to the display period of the subframe. Then, based on the steady-state duration proportion of liquid crystal molecules in the liquid crystal panel, the backlight enabling parameters of the backlight module are determined. The backlight enabling parameters are characterized by the ratio of the backlight enabling duration to the display period of the subframe. The backlight enable parameter of the backlight module is positively correlated with the proportion of steady-state duration of liquid crystal molecules in the liquid crystal panel. That is, the backlight enable parameter of the backlight module increases as the proportion of steady-state duration of liquid crystal molecules in the liquid crystal panel increases and decreases as the proportion of steady-state duration of liquid crystal molecules in the liquid crystal panel decreases. Finally, based on the backlight enable parameter of the backlight module and the backlight data of the sub-frame to be displayed, the DC current and emission duration proportion of each light-emitting device in the backlight module are determined, and the DC current and emission duration proportion of each light-emitting device are used to drive the light-emitting device to emit light, so that the backlight module provides the backlight required to display the sub-frame to be displayed.

[0021] In this way, based on the pixel difference between the image data of the current display subframe and the image data of the subframe to be displayed, the duration for which the liquid crystal molecules in the liquid crystal panel are in a steady state when displaying the subframe to be displayed is dynamically determined. Then, the duration for which the backlight module is enabled when displaying the subframe to be displayed is adaptively and dynamically adjusted. This ensures that the duration for which the backlight module is enabled matches the duration for which the liquid crystal molecules in the liquid crystal panel are in a steady state when the display device displays the subframe to be displayed. This improves the brightness loss and brightness overflow problems caused by the nonlinear response of liquid crystal flipping due to the large deviation between the two durations. As a result, the probability of color deviation in the display is effectively reduced, and the display color accuracy and overall display quality are effectively improved. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram illustrating the field sequence display effect of an embodiment;

[0024] Figure 2 This is one of the structural block diagrams of a display device according to an embodiment;

[0025] Figure 3 This is a second structural block diagram of a display device according to one embodiment;

[0026] Figure 4A This is a schematic diagram of one of the steps performed by the backlight driving module in one embodiment;

[0027] Figure 4B This is one of the schematic diagrams illustrating the relative relationship between the backlight enable duration and the total light emission duration of the light-emitting device in one embodiment;

[0028] Figure 4C This is a second schematic diagram illustrating the relative relationship between the backlight enable duration and the total light emission duration of the light-emitting device in one embodiment.

[0029] Figure 4D This is a schematic diagram illustrating the relative relationship between the duration of backlight enable parameter characterization and the duration of liquid crystal molecule steady-state characterization in one embodiment.

[0030] Figure 5 This is a flowchart illustrating step S402 of one embodiment;

[0031] Figure 6 This is a flowchart illustrating steps S402 to S405 of one embodiment;

[0032] Figure 7 This is a second schematic diagram of the steps performed by the backlight driving module in one embodiment. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0035] Color field sequence display is one method for display devices to achieve color display. Its principle includes: the backlight module adopts an RGB backlight architecture, sequentially refreshing the backlights of the three primary colors (R (red), G (green), and B (blue) within a single field time (i.e., the display cycle of one frame of a color image). The panel driver module adjusts the transmittance of each backlight source, displaying sub-frames of different colors sequentially and time-divisionally on the LCD panel. This utilizes the hysteresis effect of the human eye to achieve temporal fusion of the three color sub-frames. Thus, referencing... Figure 1The three subframes of different colors are eventually combined into a single color image in the human eye.

[0036] A liquid crystal display device that achieves color display using a field-sequential color display method is called a field-sequential color liquid crystal display (FSC LCD), or simply a field-sequential display device. The display device provided in the embodiments of this application is, for example, but not limited to, a field-sequential display device. It should be understood that the display device provided in the embodiments of this application may or may not include a color filter; this is not specifically limited. Furthermore, the image of a subframe can be a monochrome image (such as a red image, a green image, or a blue image) or a color image based on multiple primary colors; this is not specifically limited.

[0037] In one exemplary embodiment, reference is made to Figure 2 A display device is provided, which includes at least a liquid crystal panel, a backlight module, and a backlight driving module. As an example, see [reference needed]. Figure 3 The display device may also include an image processing module and a panel driving module.

[0038] The image processing module is connected to the panel driving module and the backlight driving module respectively. The image processing module is configured to decompose the original single-frame color image into multiple sub-frames arranged in time within the single-frame image period, and generate image data and backlight data corresponding to each sub-frame.

[0039] The panel driving module is connected to the LCD panel. The panel driving module can acquire image data. The panel driving module is configured to drive the LCD panel to sequentially display the images corresponding to each sub-frame within a single frame image cycle based on the image data of multiple sub-frames.

[0040] The liquid crystal panel includes a first substrate, a second substrate disposed in a cell with the first substrate, and a liquid crystal layer located between the first and second substrates after the cell assembly. The liquid crystal panel is configured to sequentially display images corresponding to multiple subframes within a single frame image period. In some embodiments, the liquid crystal panel includes multiple pixel regions, each pixel region including multiple subpixels. In some embodiments, the liquid crystal panel includes multiple subpixels arranged in an array.

[0041] The backlight module can be an RGB backlight architecture, where the R, G, and B primary colors can be implemented using red, green, and blue light-emitting devices, respectively. These light-emitting devices are, for example, but not limited to, light-emitting diodes (LEDs). The backlight module is located on the side of the LCD panel opposite the display side and provides a backlight source corresponding to each subframe. The liquid crystal layer controls the amount of light transmitted through the LCD panel by flipping the backlight. In some embodiments, the backlight module is divided into multiple backlight zones, each corresponding to a pixel area.

[0042] The backlight driver module is connected to the backlight module, see reference. Figure 4A The backlight driver module is configured to perform at least the following steps S401 to S405.

[0043] S401, acquire the first image data of the currently displayed subframe, the second image data of the subframe to be displayed, and the backlight data of the subframe to be displayed.

[0044] On the timeline, the currently displayed subframe and the subframe to be displayed are two adjacent subframes. The currently displayed subframe is the previous subframe, and the subframe to be displayed is the next subframe.

[0045] The image data of the currently displayed subframe is the first image data, and the image data of the subframe to be displayed is the second image data. The liquid crystal panel includes a plurality of subpixels arranged in an array. In some embodiments, the image data of a subframe includes at least the grayscale values ​​of each subpixel in the image of that subframe.

[0046] The backlight module includes multiple light-emitting devices arranged in an array, and these multiple light-emitting devices may include red light-emitting devices, green light-emitting devices, and blue light-emitting devices. In some embodiments, the backlight data of a subframe includes at least the following when displaying the subframe: the brightness value of the multiple light-emitting devices in the backlight module, or the equivalent current value of the multiple light-emitting devices in the backlight module (the equivalent current value and the brightness value may have a pre-calibrated mapping relationship; if the equivalent current value is known, the brightness value can be obtained based on the mapping relationship, and if the brightness value is known, the equivalent current value can be obtained based on the mapping relationship), or the original DC current and original total light-emitting duration of the multiple light-emitting devices in the backlight module, or the ratio of the original DC current and original light-emitting duration of the multiple light-emitting devices in the backlight module, or the original backlight enable duration, original DC current, and original total light-emitting duration of the multiple light-emitting devices in the backlight module, or the original backlight enable parameters, original DC current, and original light-emitting duration ratio of the multiple light-emitting devices in the backlight module.

[0047] The total duration of light emission from a light-emitting device can be characterized by the duty cycle in a pulse width modulation (PWM) signal. Based on this, in some embodiments, the light-emitting device can emit light continuously or periodically on the time axis. For example, refer to... Figure 4B Within the display cycle of a subframe, the light-emitting device emits light continuously, and the driving level (e.g., high level) appears only once. The total duration of light emission is equal to the duration of that single high level. (Reference) Figure 4C Within the display cycle of a subframe, the light-emitting device emits light periodically, with high levels appearing multiple times. The total duration of light emission is equal to the sum of the durations of each of these multiple high levels.

[0048] The light emission duration ratio is represented by the ratio of the total light emission duration to the backlight enable duration, which is also the ratio of the total light emission duration to the duration represented by the backlight enable parameters. The backlight enable parameters are represented by the ratio of the backlight enable duration to the display cycle of the sub-frame; the duration represented by the backlight enable parameters is the backlight enable duration. The backlight enable duration can be the backlight enable duration of the backlight module or the backlight enable duration of a backlight zone.

[0049] In related technologies, the original backlight enable duration (or original backlight enable parameter) can be a fixed value that was originally calibrated in advance based solely on the physical and electrical parameters of the relevant hardware inside the display device. It is not related to the image data of the sub-frame and does not change with the changes in the image data of the sub-frame.

[0050] In some embodiments, the equivalent current value of a light-emitting device can be obtained based on mathematical calculations of the original backlight enable duration, the original DC current of a light-emitting device, and the original total light-emitting duration of the light-emitting device. For example: the equivalent current value of any light-emitting device = original DC current × (original backlight enable duration / display cycle of the subframe) × (original total light-emitting duration / original backlight enable duration) = original DC current × (original total light-emitting duration / display cycle of the subframe) = original DC current × original backlight enable parameter × original light-emitting duration percentage.

[0051] S402, based on the pixel difference between the first image data and the second image data, determine the proportion of the steady-state duration of liquid crystal molecules corresponding to the image of the sub-frame to be displayed on the liquid crystal panel.

[0052] When switching from the current display subframe to the subframe to be displayed and displaying the subframe to be displayed: the display period of the subframe can be divided into two parts, the first part of which is used for the nonlinear response of the liquid crystal molecules in the liquid crystal panel to flip, and the second part of which is the duration of the liquid crystal molecules in the liquid crystal panel in a steady state.

[0053] Pixel differences include, but are not limited to, color differences, grayscale differences, or brightness differences. Based on the pixel differences between the first image data and the second image data, the proportion of the steady-state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed on the liquid crystal panel (hereinafter referred to as the steady-state duration proportion of liquid crystal molecules in the liquid crystal panel) can characterize the proportion of the total steady-state duration of all liquid crystal molecules in the liquid crystal panel within the display cycle of the subframe when switching from the current display subframe to the subframe to be displayed and displaying the subframe to be displayed.

[0054] In some embodiments, the specific value of the steady-state duration ratio of liquid crystal molecules in the liquid crystal panel is obtained by statistically calculating the steady-state duration ratio of liquid crystal molecules in multiple sub-pixels in the liquid crystal panel based on a preset data statistical strategy. The steady-state duration ratio of liquid crystal molecules in a sub-pixel is characterized as the ratio of the duration of steady-state liquid crystal molecules in that sub-pixel to the display period of the sub-frame.

[0055] In the scheme of this application embodiment, the proportion of the steady-state duration of liquid crystal molecules in the liquid crystal panel corresponds one-to-one with the sub-frame to be displayed. Each sub-frame to be displayed can correspond to the proportion of the steady-state duration of liquid crystal molecules in the liquid crystal panel. The proportion of the steady-state duration of liquid crystal molecules in the liquid crystal panel is dynamically generated in real time according to different sub-frames to be displayed. As an example, refer to Figure 4D The duration 1, which represents the proportion of steady-state duration of liquid crystal molecules in the liquid crystal panel corresponding to the (n-1)th subframe, is less than the duration 2, which represents the proportion of steady-state duration of liquid crystal molecules in the liquid crystal panel corresponding to the nth subframe; the response duration 1 of liquid crystal molecules in the liquid crystal panel corresponding to the (n-1)th subframe is greater than the response duration 2 of liquid crystal molecules in the liquid crystal panel corresponding to the nth subframe.

[0056] S403, the backlight enable parameters of the backlight module are determined based on the proportion of the steady-state duration of liquid crystal molecules. The backlight enable parameters of the backlight module are positively correlated with the proportion of the steady-state duration of liquid crystal molecules. The backlight enable parameters are characterized as the ratio of the backlight enable duration to the display period of the sub-frame.

[0057] In the scheme of this application embodiment, during the sequential display of multiple sub-frames by the display device, the backlight enable parameters of the backlight module are dynamically generated in real time according to the proportion of the steady-state duration of the liquid crystal molecules in the liquid crystal panel. The backlight enable parameters of the backlight module are positively correlated with the proportion of the steady-state duration of the liquid crystal molecules in the liquid crystal panel; that is, the backlight enable parameters of the backlight module increase as the proportion of the steady-state duration of the liquid crystal molecules in the liquid crystal panel increases, and decrease as the proportion of the steady-state duration of the liquid crystal molecules in the liquid crystal panel decreases. Thus, compared to related technologies where a fixed backlight enable duration (or original backlight enable parameters) is pre-calibrated based solely on the physical and electrical parameters of the relevant hardware within the display device, the scheme of this application embodiment ensures that the duration represented by the backlight enable parameters of the backlight module and the duration represented by the proportion of the steady-state duration of the liquid crystal molecules in the liquid crystal panel do not deviate too much. The duration represented by the backlight enable parameters is the backlight enable duration, and the duration represented by the proportion of the steady-state duration of the liquid crystal molecules in the liquid crystal panel is the duration during which the liquid crystal molecules in the liquid crystal panel are in a steady state.

[0058] In some embodiments, the backlight enable parameters of the backlight module are strongly positively correlated with the proportion of steady-state duration of liquid crystal molecules in the liquid crystal panel. For example, the correlation coefficient is greater than or equal to 0.6 and less than or equal to 1. For example, the correlation coefficient can be 0.6, 0.7, 0.8, 0.9, or 1.

[0059] In some embodiments, backlight enabling parameters of the backlight module are obtained from a preset backlight enabling parameter database, corresponding one-to-one with the proportion of steady-state duration of liquid crystal molecules in the liquid crystal panel. Specifically, the preset backlight enabling parameter database stores a one-to-one mapping table between the proportion of steady-state duration of liquid crystal molecules in the liquid crystal panel and the backlight enabling parameters of the backlight module. In the mapping table, the proportion of steady-state duration of liquid crystal molecules in the liquid crystal panel and the backlight enabling parameters of the backlight module are positively correlated, which can be linear or non-linear, but is always positively correlated. The corresponding backlight enabling parameters of the backlight module can be found from the mapping table based on the proportion of steady-state duration of liquid crystal molecules in the liquid crystal panel obtained in step S402, thereby determining the backlight enabling parameters of the backlight module.

[0060] In some embodiments, the duration characterized by the backlight enable parameter of the backlight module is equal to the product of the duration characterized by the proportion of the steady-state duration of liquid crystal molecules in the liquid crystal panel and a preset coefficient. Specifically, the duration t characterized by the proportion of the steady-state duration of liquid crystal molecules in the liquid crystal panel is equal to the product of the proportion of the steady-state duration of liquid crystal molecules in the liquid crystal panel and the display period T of the sub-frame. The backlight enable parameter of the backlight module is equal to the ratio of the duration characterized by the backlight enable parameter of the backlight module to the display period T of the sub-frame, that is, the backlight enable parameter of the backlight module is equal to the ratio of the backlight enable duration of the backlight module to the display period T of the sub-frame. Based on this, the duration characterized by the backlight enable parameter of the backlight module is equal to the product of the duration t characterized by the proportion of the steady-state duration of liquid crystal molecules in the liquid crystal panel and a preset coefficient k. Where 0.6≤k≤T / t, k can be 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2… Understandably, the value of k cannot make the duration represented by the backlight enable parameter of the backlight module greater than the display period T of the subframe.

[0061] The above are just a few examples of methods for determining the backlight enable parameters of the backlight module. In practice, there are many ways to determine the backlight enable parameters of the backlight module based on the proportion of the steady-state duration of liquid crystal molecules in the LCD panel. For example, other mathematical expressions or mapping relationships can also be used. No specific limitations are made here, as long as the backlight enable parameters of the backlight module are positively correlated with the proportion of the steady-state duration of liquid crystal molecules in the LCD panel. For example, refer to... Figure 4D In the (n-1)th subframe, the duration HT1 represented by the backlight enable parameter of the backlight module is equal to the duration 1 represented by the proportion of the steady-state duration of the liquid crystal molecules in the liquid crystal panel; in the nth subframe, the duration HT2 represented by the backlight enable parameter of the backlight module is slightly greater than the duration 2 represented by the proportion of the steady-state duration of the liquid crystal molecules in the liquid crystal panel.

[0062] In the scheme of this application embodiment, the backlight enable parameters of the backlight module correspond one-to-one with the sub-frame to be displayed. Each sub-frame to be displayed can correspond to the backlight enable parameters of a backlight module, and the backlight enable parameters of the backlight module are dynamically generated in real time according to different sub-frames to be displayed. As an example, refer to Figure 4D The backlight enable duration HT1 of the backlight module corresponding to the (n-1)th subframe is less than the backlight enable duration HT2 of the backlight module corresponding to the nth subframe.

[0063] S404. Based on the backlight enable parameters of the backlight module and the backlight data of the sub-frame to be displayed, determine the DC current and light emission duration ratio of each light-emitting device in the backlight module. The light emission duration ratio is characterized as the ratio of the total light emission duration of the light-emitting devices to the duration characterized by the backlight enable parameters of the backlight module.

[0064] To distinguish it from other embodiments, the percentage of light emission duration in this step can be used as the first percentage of light emission duration. This step determines the DC current and percentage of light emission duration of each light-emitting device in the backlight module based on the backlight data of the subframe to be displayed and the dynamically determined backlight enable parameters of the backlight module.

[0065] In some embodiments, the DC current and emission duration ratio of the light-emitting device are determined based on the following formula:

[0066] The equivalent current value of any light-emitting device = DC current × backlight enable parameter × light emission duration percentage;

[0067] Alternatively, the original DC current × (original backlight enable duration / display cycle of the subframe) × (original total light emission duration / original backlight enable duration) = DC current × backlight enable parameter × light emission duration percentage;

[0068] Alternatively, the original DC current × (original total light emission duration / display cycle of the sub-frame) = DC current × backlight enable parameter × light emission duration percentage;

[0069] Alternatively, the original DC current × the original backlight enable parameter × the original light emission duration percentage = DC current × backlight enable parameter × light emission duration percentage.

[0070] In this process, the backlight enable parameters of the backlight module determined in step S403 are substituted into any of the above formulas, and then the DC current and the proportion of light emission duration are configured according to actual driving requirements or strategies. In some embodiments, when configuring the DC current, it can be configured to be within the current range corresponding to the optimal luminous efficiency of the light-emitting device; thus ensuring that the light-emitting device is emitting light within the optimal luminous efficiency range. In some embodiments, when configuring the proportion of light emission duration, the duty cycle of the pulse width modulation signal in the total light emission duration of the light-emitting device can be configured to be greater than a preset threshold; thus, the problem of display flickering caused by an excessively small duty cycle of the pulse width modulation signal can be avoided.

[0071] The above is just an example of how to determine the DC current and the proportion of light emission time of a light-emitting device. In reality, there are many ways to determine the DC current and the proportion of light emission time of a light-emitting device based on the backlight enable parameters of the backlight module. For example, other mathematical expressions or mapping relationships can also be used to determine them. No specific limitation is made here.

[0072] As an example, refer to Figure 4DThe DC current and emission duration ratio of a light-emitting device, determined based on the backlight enable duration HT1 of the backlight module, can be DC1 and 100%, or DC2 and 60%, where DC1 ≠ DC2. Similarly, the DC current and emission duration ratio of a light-emitting device, determined based on the backlight enable duration HT2 of the backlight module, can be DC3 and 50%, or DC4 and 50%, where DC3 = DC4.

[0073] S405 drives and controls the backlight module based on the backlight enable parameters of the backlight module, the DC current of each light-emitting device in the backlight module, and the proportion of light emission time, so that the backlight module provides the backlight required to display the sub-frame to be displayed.

[0074] The backlight driving module controls the backlight module to enter the enabled state based on the backlight enable parameters determined in step S403. Based on the DC current of the light-emitting device configured in step S404, the backlight driving module controls the power supply module to provide a corresponding DC voltage to the light-emitting device during the enabled period of the backlight module. Based on the emission duration percentage of the light-emitting device configured in step S404, the backlight driving module provides a corresponding pulse width modulation signal to the light-emitting device during the enabled period of the backlight module.

[0075] The solution in this application dynamically determines the duration for which liquid crystal molecules in the liquid crystal panel are in a steady state when displaying the subframe to be displayed, based on the pixel difference between the image data of the current display subframe and the image data of the subframe to be displayed. It then adaptively and dynamically adjusts the duration for which the backlight module is enabled when displaying the subframe to be displayed, ensuring that the duration for which the backlight module is enabled matches the duration for which the liquid crystal molecules in the liquid crystal panel are in a steady state when the display device displays the subframe to be displayed. This improves the brightness loss and brightness overflow problems caused by excessive deviation between the two durations due to the nonlinear response of liquid crystal flipping, effectively reducing the probability of color deviation in the display and effectively improving the display color accuracy and overall display quality.

[0076] In one exemplary embodiment, reference is made to Figure 5 The step S402, which determines the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed on the liquid crystal panel based on the pixel difference between the first image data and the second image data, includes the following steps S501~S502.

[0077] S501, based on the pixel difference between the first image data and the second image data, determine the proportion of the steady-state duration of liquid crystal molecules in each sub-pixel of the liquid crystal panel, and obtain the minimum proportion, maximum proportion and average proportion of the steady-state duration of liquid crystal molecules in all sub-pixels.

[0078] When it is necessary to switch from the current display subframe to the subframe to be displayed, based on the pixel difference between the first image data and the second image data, the proportion of the steady-state duration of liquid crystal molecules in each sub-pixel in the liquid crystal panel is determined, and the minimum, maximum and average values ​​of the proportion of the steady-state duration of liquid crystal molecules in all sub-pixels in the liquid crystal panel are calculated.

[0079] S502, based on the first preset weight coefficient group, the minimum proportion, the maximum proportion and the average proportion are weighted and summed to obtain the first weighted summation result, and the first weighted summation result is used as the proportion of the steady state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed on the liquid crystal panel.

[0080] The first preset weighting coefficient group includes and . 1 and The specific size can be set as needed according to the actual application, and there is no limit to it. For example, it can be determined based on actual experience or multiple experimental values.

[0081] In some embodiments, the minimum proportion, maximum proportion, and average proportion are weighted and summed based on a first preset weight coefficient group to obtain a first weighted summation result. ,include:

[0082] ;

[0083] in, To be the largest proportion, For average percentage, This represents the minimum percentage.

[0084] In some embodiments, the determination can also be based on at most two of the minimum percentage, maximum percentage, and average percentage. Of course, other data statistical strategies can also be used to determine the duration of steady-state liquid crystal molecules in each sub-pixel of the LCD panel. For example, to determine the relatively small or relatively large percentages for calculation. However, the embodiments in this application do not limit this.

[0085] The solution in this embodiment determines the proportion of the steady-state duration of liquid crystal molecules corresponding to the image of the sub-frame to be displayed on the liquid crystal panel based on the proportion of the steady-state duration of liquid crystal molecules in each sub-pixel of the liquid crystal panel. This method is not only simple and efficient, saving computing resources, but also the obtained proportion value is highly reliable and can accurately characterize the proportion of the time when all liquid crystal molecules in the liquid crystal panel are in a steady state within the display cycle of the sub-frame.

[0086] In one exemplary embodiment, the liquid crystal panel includes multiple pixel regions, and the backlight module is divided into multiple backlight zones. Each backlight zone corresponds to a pixel region within the liquid crystal panel. Each backlight zone includes multiple light-emitting devices, and each pixel region includes multiple sub-pixels. The pixel region corresponding to a backlight zone can be the area comprised of all the sub-pixels that can be covered by the light emitted from that backlight zone. (Reference) Figure 6 The step S402, which determines the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed on the liquid crystal panel based on the pixel difference between the first image data and the second image data, includes the following steps S601~S602.

[0087] S601, based on the pixel difference between the first image data and the second image data, determine the proportion of the steady-state duration of liquid crystal molecules in each sub-pixel in the target pixel region, and obtain the minimum proportion, maximum proportion and average proportion of the steady-state duration of liquid crystal molecules in all sub-pixels, wherein the target pixel region is any one of multiple pixel regions.

[0088] When switching from the current display subframe to the subframe to be displayed, the proportion of steady-state duration of liquid crystal molecules in each pixel region is determined based on the pixel differences between the first image data and the second image data. The proportion of steady-state duration of liquid crystal molecules in a pixel region can characterize the proportion of the total steady-state duration of all liquid crystal molecules in the pixel region within the display cycle of the subframe when switching from the current display subframe to the subframe to be displayed and displaying the subframe.

[0089] Taking the target pixel region as an example: Based on the pixel difference between the first image data and the second image data, the proportion of the steady-state duration of liquid crystal molecules in each sub-pixel in the target pixel region is determined, and the minimum, maximum and average values ​​of the proportion of the steady-state duration of liquid crystal molecules in all sub-pixels in the target pixel region are calculated.

[0090] S602, based on the second preset weight coefficient group, the minimum proportion, the maximum proportion and the average proportion are weighted and summed to obtain the second weighted sum result, and the second weighted sum result is used as the proportion of the steady state duration of liquid crystal molecules in the target pixel area.

[0091] The second preset weighting coefficient group includes and . 2 and The specific size can be set as needed according to the actual application, and there is no limit to it. For example, it can be determined based on actual experience or multiple experimental values.

[0092] In some embodiments, the minimum proportion, maximum proportion, and average proportion are weighted and summed based on a second preset weight coefficient group to obtain a second weighted summation result. ,include:

[0093] ;

[0094] in, To be the largest proportion, For average percentage, This represents the minimum percentage.

[0095] In some exemplary embodiments, the determination can also be based on at most two of the minimum percentage, maximum percentage, and average percentage. Of course, other data statistical strategies can also be used to determine the steady-state duration ratio of liquid crystal molecules in each sub-pixel within the target pixel region. For example, to determine the relatively small or relatively large percentages for calculation. However, the embodiments in this application do not limit this.

[0096] In this embodiment, during the sequential display of multiple subframes by the display device, the proportion of steady-state duration of liquid crystal molecules in the same pixel region is dynamically generated in real time with different subframes to be displayed. The proportion of steady-state duration of liquid crystal molecules in different pixel regions may be the same or different.

[0097] In some embodiments, continue to refer to Figure 6 The backlight enabling parameters of the backlight module are determined based on the proportion of the steady-state duration of liquid crystal molecules in step S403. The backlight enabling parameters of the backlight module are positively correlated with the proportion of the steady-state duration of liquid crystal molecules, including the following step S603.

[0098] S603, the backlight enabling parameters of the corresponding target backlight partition are determined based on the proportion of the steady-state duration of liquid crystal molecules in the target pixel region, wherein the backlight enabling parameters of the target backlight partition are positively correlated with the proportion of the steady-state duration of liquid crystal molecules in the target pixel region.

[0099] During the process of sequentially displaying multiple subframes on the display device, the backlight enable parameters of the target backlight partition are dynamically generated in real time according to the proportion of the steady-state duration of the liquid crystal molecules in the target pixel area. In other words, the backlight enable parameters of the same backlight partition are dynamically generated in real time with different subframes to be displayed, and the backlight enable parameters of different backlight partitions may be the same or different.

[0100] In some embodiments, the backlight enable parameter of the target backlight partition is strongly positively correlated with the proportion of steady-state duration of liquid crystal molecules in the target pixel region. The strong positive correlation is, for example, a correlation coefficient greater than or equal to 0.6 and less than or equal to 1. For example, the correlation coefficient can be 0.6, 0.7, 0.8, 0.9, or 1.

[0101] In some embodiments, the backlight enabling parameters of the target backlight partition, which correspond one-to-one with the proportion of the steady-state duration of liquid crystal molecules in the target pixel region, can be obtained from a preset backlight enabling parameter database.

[0102] In some embodiments, the duration characterized by the backlight enable parameter of the target backlight partition can be equal to the product of the duration characterized by the proportion of the steady-state duration of liquid crystal molecules in the target pixel region and a preset coefficient k.

[0103] In the scheme of this application embodiment, the backlight enable parameters of the target backlight partition correspond one-to-one with the sub-frame to be displayed, and the backlight enable parameters of the target backlight partition are dynamically generated in real time with different sub-frames to be displayed.

[0104] In some embodiments, continue to refer to Figure 6 Step S404 involves determining the DC current and emission duration ratio of each light-emitting device in the backlight module based on the backlight enable parameters of the backlight module and the backlight data of the subframe to be displayed. The emission duration ratio is characterized as the ratio of the total emission duration of the light-emitting devices to the duration characterized by the backlight enable parameters of the backlight module, and includes the following step S604.

[0105] S604. Based on the backlight enable parameters and backlight data of the target backlight zone, determine the DC current and emission duration ratio of each light-emitting device in the target backlight zone. The emission duration ratio is characterized as the ratio of the total emission duration of the light-emitting device to the duration characterized by the backlight enable parameters of the target backlight zone.

[0106] To distinguish it from other embodiments, the percentage of light emission duration in this step can be used as the second percentage of light emission duration. This step determines the DC current and percentage of light emission duration of each light-emitting device in the target backlight zone based on the backlight data of the target backlight zone and the dynamically determined backlight enable parameters of the target backlight zone.

[0107] In some embodiments, the DC current and emission duration ratio of the light-emitting device are determined based on the following formula:

[0108] The equivalent current value of any light-emitting device = DC current × backlight enable parameter × light emission duration percentage;

[0109] Alternatively, the original DC current × (original backlight enable duration / display cycle of the subframe) × (original total light emission duration / original backlight enable duration) = DC current × backlight enable parameter × light emission duration percentage;

[0110] Alternatively, the original DC current × (original total light emission duration / display cycle of the sub-frame) = DC current × backlight enable parameter × light emission duration percentage;

[0111] Alternatively, the original DC current × the original backlight enable parameter × the original light emission duration percentage = DC current × backlight enable parameter × light emission duration percentage.

[0112] In this process, after substituting the backlight enable parameters of the target backlight partition determined in step S603 into any of the above formulas, the DC current and the proportion of light emission time are configured according to the actual driving requirements or strategy.

[0113] It should be noted that the parameter levels should be consistent within the same formula. In other words, within the same formula, either both sides of the equation are backlight enable parameters for the backlight zones, or both sides of the equation are backlight enable parameters for the backlight modules. The same formula should either apply to the same pixel area or to the same LCD panel.

[0114] In some embodiments, continue to refer to Figure 6 The backlight module is driven and controlled in step S405 based on the backlight enable parameters of the backlight module, the DC current of each light-emitting device in the backlight module, and the proportion of light emission duration, including the following step S605.

[0115] S605 drives and controls the target backlight zone based on the backlight enable parameters of the target backlight zone, the DC current of each light-emitting device in the target backlight zone, and the proportion of light emission duration.

[0116] The backlight driving module controls the target backlight partition to enter the enabled state based on the backlight enable parameters determined in step S603. Based on the DC current of the light-emitting devices configured in step S604, the backlight driving module controls the power supply module to provide the corresponding DC voltage to the corresponding light-emitting devices within the target backlight partition during the enabled period. Based on the emission duration percentage of the light-emitting devices configured in step S604, the backlight driving module provides the corresponding pulse width modulation signal to the corresponding light-emitting devices within the target backlight partition during the enabled period.

[0117] In this embodiment, the backlight enable parameters for different backlight zones are determined. Based on these parameters, the DC current and emission duration ratio of each light-emitting device within the backlight zone are determined to drive and control the backlight module according to different backlight zones. Specifically, the duration for which liquid crystal molecules in the target pixel region are in a steady state when displaying the subframe to be displayed is dynamically determined. The duration for which the target backlight zone is enabled when displaying the subframe is then adaptively and dynamically adjusted ensures that the enabled duration of the target backlight zone matches the steady-state duration of the liquid crystal molecules in the target pixel region. This more precisely improves the brightness loss and brightness overflow problems caused by excessive deviation in duration and the nonlinear response of liquid crystal flipping, thereby more effectively reducing the probability of color deviation and improving display color accuracy and overall display quality.

[0118] In one exemplary embodiment, a subpixel is designated as any subpixel within the liquid crystal panel.

[0119] refer to Figure 7 The backlight driving module is also configured to determine the proportion of steady-state duration of liquid crystal molecules in a specified sub-pixel, including the following steps S701~S702.

[0120] S701, obtain the first pixel value of a specified sub-pixel in the first image data, and obtain the second pixel value of a specified sub-pixel in the second image data, wherein the specified sub-pixel is any sub-pixel in the liquid crystal panel.

[0121] For example only, the first pixel value is the first grayscale value, and the second pixel value is the second grayscale value. The first grayscale value specified in the first image data is the grayscale value of the specified sub-pixel within the current display sub-frame; the second grayscale value specified in the second image data is the grayscale value of the specified sub-pixel within the sub-frame to be displayed.

[0122] S702, obtain the liquid crystal molecule response time required for a specified sub-pixel to switch from the first pixel value to the second pixel value from the preset response time database, and determine the proportion of the steady-state time of the liquid crystal molecules of the specified sub-pixel based on the liquid crystal molecule response time and the display period of the sub-frame.

[0123] For example only, the first pixel value is a first grayscale value, and the second pixel value is a second grayscale value. As an example, the preset response time database includes Table 1. Based on Table 1, the liquid crystal molecule response time required for a specified sub-pixel to switch from the first grayscale value to the second grayscale value can be obtained. In Table 1, the data in the first row represents different first grayscale values ​​'a' of the sub-pixel, the data in the first column represents different second grayscale values ​​'b' of the sub-pixel, and the data between the first row and the first column represents the liquid crystal molecule response time required for the sub-pixel to switch from the first grayscale value 'a' to the second grayscale value 'b'. For example, "191" in the first row indicates that the first grayscale value 'a' of the sub-pixel is 191, and "255" in the first column indicates that the second grayscale value 'b' of the sub-pixel is 255. The value "1.92" corresponding to 191 and 255 is the liquid crystal molecule response time required for the sub-pixel to switch from 191 to 255.

[0124] Table 1

[0125]

[0126] In addition, the preset response time database can also include liquid crystal molecule response curves for several sub-pixels when switching from a first grayscale value to a second grayscale value. The response time of liquid crystal molecules when switching between different grayscale values ​​can be obtained based on these response curves. Alternatively, the preset response time database can also include measured liquid crystal molecule response times when switching between several different grayscale values, and the response time of liquid crystal molecules when switching between different grayscale values ​​can be obtained based on these. It is understood that there are various methods for obtaining the response time of liquid crystal molecules when switching between different pixel values ​​or grayscale values, and these methods can be set as needed according to actual applications; no specific limitations are imposed.

[0127] In some embodiments, the proportion of steady-state duration of liquid crystal molecules in a specified sub-pixel can be determined using the following formula:

[0128]

[0129] in, The percentage of the steady-state duration of liquid crystal molecules in a specified sub-pixel, where T is the display period of the sub-frame. To specify the liquid crystal molecule response time required for a sub-pixel to switch from a first pixel value to a second pixel value, The percentage of the liquid crystal molecule response time of a specified subpixel is represented by 'a', where 'a' is the first pixel value of the specified subpixel and 'b' is the second pixel value of the specified subpixel. This is just an example; both the first and second pixel values ​​are grayscale values.

[0130] Based on the same inventive concept, this application also provides a backlight control method applied to a display device. The display device includes a liquid crystal panel and a backlight module. The liquid crystal panel is configured to sequentially display images corresponding to multiple sub-frames within a single frame image period. The method includes:

[0131] Acquire the first image data of the currently displayed subframe, the second image data of the subframe to be displayed, and the backlight data of the subframe to be displayed;

[0132] Based on the pixel difference between the first image data and the second image data, the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the sub-frame to be displayed displayed by the liquid crystal panel is determined, wherein the proportion of steady-state duration of liquid crystal molecules is characterized as the ratio of the duration of the liquid crystal molecules in a steady state to the display period of the sub-frame.

[0133] The backlight enabling parameters of the backlight module are determined based on the proportion of the steady-state duration of the liquid crystal molecules. The backlight enabling parameters of the backlight module are positively correlated with the proportion of the steady-state duration of the liquid crystal molecules. The backlight enabling parameters are characterized as the ratio of the backlight enabling duration to the display period of the sub-frame.

[0134] Based on the backlight enable parameters of the backlight module and the backlight data of the subframe to be displayed, the DC current and the proportion of light emission duration of each light-emitting device in the backlight module are determined. The proportion of light emission duration is characterized as the ratio of the total light emission duration of the light-emitting devices to the duration characterized by the backlight enable parameters of the backlight module.

[0135] Based on the backlight enable parameters of the backlight module, the DC current and emission duration ratio of each light-emitting device in the backlight module, the backlight module is driven and controlled to provide the backlight required to display the sub-frame to be displayed.

[0136] In one exemplary embodiment, the liquid crystal panel includes a plurality of sub-pixels;

[0137] The step of determining the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed displayed by the liquid crystal panel based on the pixel difference between the first image data and the second image data includes:

[0138] Based on the pixel difference between the first image data and the second image data, the proportion of steady-state duration of liquid crystal molecules in each sub-pixel of the liquid crystal panel is determined, and the minimum proportion, maximum proportion and average proportion of steady-state duration of liquid crystal molecules in all sub-pixels are obtained.

[0139] Based on the first preset weight coefficient group, the minimum proportion, the maximum proportion and the average proportion are weighted and summed to obtain the first weighted summation result, and the first weighted summation result is used as the proportion of the steady state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed displayed on the liquid crystal panel.

[0140] In one exemplary embodiment, the liquid crystal panel includes multiple pixel regions, each pixel region includes multiple sub-pixels, and the backlight module is divided into multiple backlight partitions, each backlight partition corresponding to one of the pixel regions.

[0141] The step of determining the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed displayed by the liquid crystal panel based on the pixel difference between the first image data and the second image data includes:

[0142] Based on the pixel difference between the first image data and the second image data, the proportion of the steady-state duration of liquid crystal molecules in each sub-pixel in the target pixel region is determined, and the minimum proportion, maximum proportion and average proportion of the steady-state duration of liquid crystal molecules in all sub-pixels are obtained, wherein the target pixel region is any one of the plurality of pixel regions;

[0143] Based on the second preset weight coefficient group, the minimum proportion, the maximum proportion and the average proportion are weighted and summed to obtain the second weighted summation result, and the second weighted summation result is used as the proportion of the steady state duration of liquid crystal molecules in the target pixel region;

[0144] The backlight enabling parameters of the backlight module are determined based on the proportion of the steady-state duration of the liquid crystal molecules, wherein the backlight enabling parameters of the backlight module are positively correlated with the proportion of the steady-state duration of the liquid crystal molecules, including:

[0145] The backlight enabling parameters of the corresponding target backlight partition are determined based on the proportion of steady-state duration of liquid crystal molecules in the target pixel region, wherein the backlight enabling parameters of the target backlight partition are positively correlated with the proportion of steady-state duration of liquid crystal molecules in the target pixel region.

[0146] The step involves determining the DC current and emission duration ratio of each light-emitting device in the backlight module based on the backlight enable parameters of the backlight module and the backlight data of the sub-frame to be displayed. The emission duration ratio is characterized as the ratio of the total emission duration of the light-emitting devices to the duration characterized by the backlight enable parameters of the backlight module, including:

[0147] Based on the backlight enable parameters of the target backlight zone and the backlight data of the target backlight zone, the DC current and light emission duration ratio of each light-emitting device in the target backlight zone are determined, wherein the light emission duration ratio is characterized as the ratio of the total light emission duration of the light-emitting device to the duration characterized by the backlight enable parameters of the target backlight zone.

[0148] The driving control of the backlight module based on the backlight enable parameters of the backlight module, the DC current of each light-emitting device in the backlight module, and the proportion of light emission duration includes:

[0149] Based on the backlight enable parameters of the target backlight zone, the DC current and emission duration ratio of each light-emitting device in the target backlight zone, the target backlight zone is driven and controlled.

[0150] The display device and backlight control method provided in the embodiments of this application belong to the same inventive concept and can solve the same technical problem. The repeated content will not be described again here.

[0151] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0152] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0153] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A display device, characterized in that, include: The LCD panel is configured to sequentially display images corresponding to multiple subframes within a single frame image cycle; Backlight module; The backlight driver module is configured as follows: Acquire the first image data of the currently displayed subframe, the second image data of the subframe to be displayed, and the backlight data of the subframe to be displayed; Based on the pixel difference between the first image data and the second image data, the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the sub-frame to be displayed displayed by the liquid crystal panel is determined, wherein the proportion of steady-state duration of liquid crystal molecules is characterized as the ratio of the duration of the liquid crystal molecules in a steady state to the display period of the sub-frame. The backlight enabling parameters of the backlight module are determined based on the proportion of the steady-state duration of the liquid crystal molecules. The backlight enabling parameters of the backlight module are positively correlated with the proportion of the steady-state duration of the liquid crystal molecules. The backlight enabling parameters are characterized as the ratio of the backlight enabling duration to the display period of the sub-frame. Based on the backlight enable parameters of the backlight module and the backlight data of the subframe to be displayed, the DC current and the proportion of light emission duration of each light-emitting device in the backlight module are determined. The proportion of light emission duration is characterized as the ratio of the total light emission duration of the light-emitting devices to the duration characterized by the backlight enable parameters of the backlight module. Based on the backlight enable parameters of the backlight module, the DC current and emission duration ratio of each light-emitting device in the backlight module, the backlight module is driven and controlled to provide the backlight required to display the sub-frame to be displayed.

2. The display device according to claim 1, characterized in that, The liquid crystal panel includes multiple sub-pixels; The step of determining the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed displayed by the liquid crystal panel based on the pixel difference between the first image data and the second image data includes: Based on the pixel difference between the first image data and the second image data, the proportion of steady-state duration of liquid crystal molecules in each sub-pixel of the liquid crystal panel is determined, and the minimum proportion, maximum proportion and average proportion of steady-state duration of liquid crystal molecules in all sub-pixels are obtained. Based on the first preset weight coefficient group, the minimum proportion, the maximum proportion and the average proportion are weighted and summed to obtain the first weighted summation result, and the first weighted summation result is used as the proportion of the steady state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed displayed on the liquid crystal panel.

3. The display device according to claim 1, characterized in that, The liquid crystal panel includes multiple pixel areas, each pixel area includes multiple sub-pixels, and the backlight module is divided into multiple backlight partitions, each backlight partition corresponding to one of the pixel areas. The step of determining the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed displayed by the liquid crystal panel based on the pixel difference between the first image data and the second image data includes: Based on the pixel difference between the first image data and the second image data, the proportion of the steady-state duration of liquid crystal molecules in each sub-pixel in the target pixel region is determined, and the minimum proportion, maximum proportion and average proportion of the steady-state duration of liquid crystal molecules in all sub-pixels are obtained, wherein the target pixel region is any one of the plurality of pixel regions; Based on the second preset weight coefficient group, the minimum proportion, the maximum proportion and the average proportion are weighted and summed to obtain the second weighted summation result, and the second weighted summation result is used as the proportion of the steady-state duration of liquid crystal molecules in the target pixel region.

4. The display device according to claim 3, characterized in that, The backlight enabling parameters of the backlight module are determined based on the proportion of the steady-state duration of the liquid crystal molecules, wherein the backlight enabling parameters of the backlight module are positively correlated with the proportion of the steady-state duration of the liquid crystal molecules, including: The backlight enabling parameters of the corresponding target backlight partition are determined based on the proportion of steady-state duration of liquid crystal molecules in the target pixel region, wherein the backlight enabling parameters of the target backlight partition are positively correlated with the proportion of steady-state duration of liquid crystal molecules in the target pixel region. The step involves determining the DC current and emission duration ratio of each light-emitting device in the backlight module based on the backlight enable parameters of the backlight module and the backlight data of the sub-frame to be displayed. The emission duration ratio is characterized as the ratio of the total emission duration of the light-emitting devices to the duration characterized by the backlight enable parameters of the backlight module, including: Based on the backlight enable parameters of the target backlight zone and the backlight data of the target backlight zone, the DC current and light emission duration ratio of each light-emitting device in the target backlight zone are determined, wherein the light emission duration ratio is characterized as the ratio of the total light emission duration of the light-emitting device to the duration characterized by the backlight enable parameters of the target backlight zone. The driving control of the backlight module based on the backlight enable parameters of the backlight module, the DC current of each light-emitting device in the backlight module, and the proportion of light emission duration includes: Based on the backlight enable parameters of the target backlight zone, the DC current and emission duration ratio of each light-emitting device in the target backlight zone, the target backlight zone is driven and controlled.

5. The display device according to any one of claims 1-4, characterized in that, The liquid crystal panel includes a plurality of sub-pixels, and a designated sub-pixel is any one of the plurality of sub-pixels; The backlight driving module is also configured to determine the proportion of steady-state duration of liquid crystal molecules in a specified sub-pixel, including: Obtain the first pixel value of a specified sub-pixel in the first image data, and obtain the second pixel value of a specified sub-pixel in the second image data; In the preset response duration database, the liquid crystal molecule response duration required for a specified sub-pixel to switch from the first pixel value to the second pixel value is obtained, and the proportion of the liquid crystal molecule steady-state duration of the specified sub-pixel is determined based on the liquid crystal molecule response duration and the display period of the sub-frame.

6. The display device according to claim 5, characterized in that, Determining the proportion of steady-state duration of liquid crystal molecules in a specified sub-pixel based on the liquid crystal molecule response time and the display period of the sub-frame includes: in, This refers to the percentage of the steady-state duration of liquid crystal molecules in a specified sub-pixel. denoted as the liquid crystal molecule response time, T as the display period of the subframe, a as the first pixel value of the specified sub-pixel, and b as the second pixel value of the specified sub-pixel.

7. The display device according to claim 1 or 2, characterized in that, The determination of the backlight enable parameters of the backlight module based on the proportion of the steady-state duration of the liquid crystal molecules includes: In the preset backlight enable parameter database, obtain the backlight enable parameters of the backlight module that correspond one-to-one with the proportion of the steady-state duration of the liquid crystal molecules; Alternatively, the duration represented by the backlight enable parameter of the backlight module is equal to the product of the duration represented by the proportion of steady-state duration of the liquid crystal molecules and a preset coefficient, where 0.6≤k≤T / t, k is the preset coefficient, T is the display period of the sub-frame, and t is the duration represented by the proportion of steady-state duration of the liquid crystal molecules.

8. A backlight control method applied to a display device, the display device comprising a liquid crystal panel and a backlight module, the liquid crystal panel being configured to sequentially display images corresponding to multiple subframes within a single frame image period, characterized in that... The method includes: Acquire the first image data of the currently displayed subframe, the second image data of the subframe to be displayed, and the backlight data of the subframe to be displayed; Based on the pixel difference between the first image data and the second image data, the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the sub-frame to be displayed displayed by the liquid crystal panel is determined, wherein the proportion of steady-state duration of liquid crystal molecules is characterized as the ratio of the duration of the liquid crystal molecules in a steady state to the display period of the sub-frame. The backlight enabling parameters of the backlight module are determined based on the proportion of the steady-state duration of the liquid crystal molecules. The backlight enabling parameters of the backlight module are positively correlated with the proportion of the steady-state duration of the liquid crystal molecules. The backlight enabling parameters are characterized as the ratio of the backlight enabling duration to the display period of the sub-frame. Based on the backlight enable parameters of the backlight module and the backlight data of the subframe to be displayed, the DC current and the proportion of light emission duration of each light-emitting device in the backlight module are determined. The proportion of light emission duration is characterized as the ratio of the total light emission duration of the light-emitting devices to the duration characterized by the backlight enable parameters of the backlight module. Based on the backlight enable parameters of the backlight module, the DC current and emission duration ratio of each light-emitting device in the backlight module, the backlight module is driven and controlled to provide the backlight required to display the sub-frame to be displayed.

9. The backlight control method according to claim 8, characterized in that, The liquid crystal panel includes multiple sub-pixels; The step of determining the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed displayed by the liquid crystal panel based on the pixel difference between the first image data and the second image data includes: Based on the pixel difference between the first image data and the second image data, the proportion of steady-state duration of liquid crystal molecules in each sub-pixel of the liquid crystal panel is determined, and the minimum proportion, maximum proportion and average proportion of steady-state duration of liquid crystal molecules in all sub-pixels are obtained. Based on the first preset weight coefficient group, the minimum proportion, the maximum proportion and the average proportion are weighted and summed to obtain the first weighted summation result, and the first weighted summation result is used as the proportion of the steady state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed displayed on the liquid crystal panel.

10. The backlight control method according to claim 8, characterized in that, The liquid crystal panel includes multiple pixel areas, each pixel area includes multiple sub-pixels, and the backlight module is divided into multiple backlight partitions, each backlight partition corresponding to one of the pixel areas. The step of determining the proportion of steady-state duration of liquid crystal molecules corresponding to the image of the subframe to be displayed displayed by the liquid crystal panel based on the pixel difference between the first image data and the second image data includes: Based on the pixel difference between the first image data and the second image data, the proportion of the steady-state duration of liquid crystal molecules in each sub-pixel in the target pixel region is determined, and the minimum proportion, maximum proportion and average proportion of the steady-state duration of liquid crystal molecules in all sub-pixels are obtained, wherein the target pixel region is any one of the plurality of pixel regions; Based on the second preset weight coefficient group, the minimum proportion, the maximum proportion and the average proportion are weighted and summed to obtain the second weighted summation result, and the second weighted summation result is used as the proportion of the steady state duration of liquid crystal molecules in the target pixel region; The backlight enabling parameters of the backlight module are determined based on the proportion of the steady-state duration of the liquid crystal molecules, wherein the backlight enabling parameters of the backlight module are positively correlated with the proportion of the steady-state duration of the liquid crystal molecules, including: The backlight enabling parameters of the corresponding target backlight partition are determined based on the proportion of the steady-state duration of liquid crystal molecules in the target pixel region, wherein the backlight enabling parameters of the target backlight partition are positively correlated with the proportion of the steady-state duration of liquid crystal molecules in the target pixel region.

Images