CN116543709A

CN116543709A - Backlight control device, method and equipment

Info

Publication number: CN116543709A
Application number: CN202310438512.5A
Authority: CN
Inventors: 卢康; 张驰
Original assignee: Beijing Eswin Computing Technology Co Ltd; Haining Eswin IC Design Co Ltd
Current assignee: Beijing Eswin Computing Technology Co Ltd; Haining Eswin IC Design Co Ltd
Priority date: 2023-04-18
Filing date: 2023-04-18
Publication date: 2023-08-04

Abstract

The present disclosure provides a backlight control apparatus, method and device, the apparatus comprising: the device comprises a backlight extraction module, an adaptive spatial filtering module, an adaptive time domain filtering module and a backlight enhancement module; the backlight extraction module is used for determining initial brightness values of all backlight partitions of the backlight source based on gray scale information of all image partitions of the current frame image; each image partition corresponds to each backlight partition one by one; the self-adaptive spatial filtering module is used for carrying out self-adaptive spatial filtering on the initial brightness value of the backlight subarea aiming at each backlight subarea to obtain the spatial filtering value of the backlight subarea; the self-adaptive time domain filtering module is used for carrying out self-adaptive time domain filtering on the spatial domain filtering value to obtain a first brightness value of the backlight partition; the backlight enhancement module is used for controlling the brightness of the backlight source through the backlight driving chip based on the first brightness value of each backlight partition. The backlight control device, method and equipment provided by the disclosure are used for improving the display effect of a picture.

Description

Backlight control device, method and equipment

Technical Field

The disclosure relates to the technical field of display control, and in particular relates to a backlight control device, method and equipment.

Background

The liquid crystal display (Liquid Crystal Display, LCD) device is a non-self-luminous display device, and the liquid crystal display device includes a backlight source and a liquid crystal panel, wherein the backlight source is used for providing backlight to the liquid crystal panel, and the liquid crystal panel changes the light transmittance of the backlight through the deflection of liquid crystal molecules, so as to realize the picture display.

In the related art, backlight control is generally required for a backlight. The current method for controlling the backlight source can cause the problems of halation and flickering of the picture displayed by the liquid crystal panel, thereby causing poor display effect of the picture.

Disclosure of Invention

The disclosure provides a backlight control device, a backlight control method and backlight control equipment, which are used for solving the defect of poor display effect of pictures in the prior art and achieving the purpose of improving the display effect of the pictures.

In a first aspect, the present disclosure provides a backlight control apparatus, comprising:

the backlight extraction module is used for determining the initial brightness value of each backlight partition of the backlight source based on the gray level information of each image partition of the current frame image; the image partitions and the backlight partitions are in one-to-one correspondence;

the self-adaptive spatial filtering module is used for carrying out self-adaptive spatial filtering on the initial brightness value of the backlight subarea aiming at each backlight subarea to obtain a spatial filtering value of the backlight subarea;

The adaptive time domain filtering module is used for carrying out adaptive time domain filtering on the spatial domain filtering value to obtain a first brightness value of the backlight partition;

and the backlight enhancement module is used for controlling the brightness of the backlight source through a backlight driving chip based on the first brightness value of each backlight partition.

According to the backlight control device provided by the disclosure, the adaptive spatial filtering module performs adaptive spatial filtering on an initial brightness value of the backlight partition to obtain a spatial filtering value of the backlight partition, and the adaptive spatial filtering module comprises:

determining a preset area taking the backlight partition as a center;

determining the difference value of the initial brightness values of all backlight partitions in the preset area;

determining a filter factor corresponding to each backlight partition in the preset area based on the difference value and the position of each backlight partition in the preset area;

and performing adaptive spatial filtering on the initial brightness value of each backlight partition in the preset area based on the filter factors corresponding to each backlight partition in the preset area to obtain the spatial filtering value of the backlight partition.

According to the backlight control apparatus provided by the present disclosure, the determining, based on the difference value and the position of each backlight partition in the preset area, a filter factor corresponding to each backlight partition in the preset area includes:

Determining a first adjustment factor based on the difference value and a first preset value;

determining a second adjustment factor corresponding to each backlight partition in the preset area based on the position of the backlight partition in the preset area and the first adjustment factor;

determining the sum value of second adjusting factors corresponding to each backlight partition in the preset area;

and determining the ratio of the second adjusting factor of the backlight subarea to the sum value as a filtering factor corresponding to the backlight subarea aiming at each backlight subarea in the preset area.

According to the backlight control device provided by the disclosure, the adaptive time domain filtering module performs adaptive time domain filtering on the spatial filtering value of the backlight partition to obtain a first brightness value of the backlight partition, and the method includes:

obtaining K reference spatial filter values corresponding to the backlight partitions; the K reference spatial filtering values are obtained based on the previous K frame images of the current frame image, wherein K is an integer greater than or equal to 1;

determining smoothing factors corresponding to (K+1) frame images on the backlight subarea based on the spatial filtering values of the backlight subarea and the K reference spatial filtering values; wherein the (k+1) frame image includes the current frame image and the previous K frame image;

And performing adaptive time domain filtering on the spatial filtering value of the backlight partition and the K reference spatial filtering values based on the smoothing factors corresponding to the (K+1) frame images respectively to obtain a first brightness value of the backlight partition.

According to the backlight control device provided by the present disclosure, the backlight enhancement module controls the brightness of the backlight source through the backlight driving chip based on the first brightness value of each backlight partition, and the backlight control device comprises:

performing backlight enhancement on the first brightness value of each backlight partition to obtain a second brightness value of each backlight partition;

and providing the second brightness value of each backlight partition to the backlight driving chip so as to control the brightness of the backlight source based on the second brightness value of each backlight partition through the backlight driving chip.

According to the backlight control apparatus provided in the present disclosure, the performing backlight enhancement on the first luminance value of each backlight partition to obtain the second luminance value of each backlight partition includes:

mapping and encoding the first brightness value of each backlight partition based on preset attribute parameters to obtain a third brightness value of each backlight partition;

determining a backlight brightness gain based on a preset backlight brightness maximum value and a third brightness value of each backlight partition;

Determining an adjustment gain for each backlight partition based on the backlight brightness gain, a backlight brightness threshold, and a third brightness value for each backlight partition;

determining the product of the adjustment gain and the third brightness value of each backlight partition as a fourth brightness value of each backlight partition;

and determining a second brightness value of each backlight partition based on the fourth brightness value of each backlight partition and the preset maximum value of the backlight brightness.

According to the backlight control device provided by the disclosure, the device further comprises:

and the pixel compensation module is used for compensating the gray scale value of each pixel in the current frame image based on the second brightness value of each backlight partition to obtain a target image corresponding to the current frame image, and the target image is displayed under the condition that the backlight enhancement module controls the brightness of the backlight source through the backlight driving chip.

According to the backlight control device provided by the present disclosure, the pixel compensation module compensates the gray scale value of each pixel in the current frame image based on the second brightness value of each backlight partition, to obtain a target image corresponding to the current frame image, and the method includes:

determining a target brightness value of each pixel based on the second brightness value of each backlight partition;

And compensating the gray scale value of each pixel based on the target brightness value of each pixel to obtain a target image corresponding to the current frame image.

According to the present disclosure, the determining, based on the second luminance value of each backlight partition, the target luminance value of each pixel includes:

mapping each backlight partition from the first resolution of the current frame image to the second resolution to obtain a mapping block corresponding to each of the plurality of backlight partitions;

determining, for each pixel, a light diffusion influence factor of a backlight partition corresponding to the mapping block on the pixel based on the position of the pixel and the position of the mapping block; determining an initial brightness value of the pixel based on the light diffusion influence factor and a second brightness value of a backlight partition corresponding to the mapping partition;

smoothing and filtering the initial brightness value of each pixel to obtain an intermediate brightness value of each pixel;

and up-sampling the intermediate brightness value of each pixel from the second resolution to the first resolution to obtain the target brightness value of each pixel.

According to the backlight control device provided by the present disclosure, the compensating the gray-scale value of each pixel in the current frame image based on the target brightness value of each pixel to obtain a target image corresponding to the current frame image includes:

Determining a gray scale compensation coefficient of each pixel based on the preset brightness value and the target brightness value of each pixel;

and multiplying the gray scale value of each pixel by the gray scale compensation coefficient of the corresponding pixel to obtain a target image corresponding to the current frame image.

According to the backlight control device provided by the disclosure, the gray scale information of the image partition comprises the gray scale value of each pixel in the image partition;

the backlight extraction module determines an initial brightness value of a backlight partition corresponding to an image partition based on gray scale information of the image partition, and the method comprises the following steps:

determining a maximum gray level value, a minimum gray level value and an average gray level value of the image partition based on the gray level value of each pixel in the image partition;

and determining an initial brightness value of a backlight partition corresponding to the image partition based on the maximum gray level value, the minimum gray level value and the average gray level value of the image partition.

According to the backlight control apparatus provided in the present disclosure, the determining, based on the maximum gray-scale value, the minimum gray-scale value, and the average gray-scale value of the image partition, an initial brightness value of a backlight partition corresponding to the image partition includes:

determining a weighting factor based on a gray level threshold, and a maximum gray level value, a minimum gray level value and an average gray level value of the image partition;

Determining a first product of the weighting factor and the maximum gray scale value, and determining a second product of a difference value between a second preset value and the weighting factor and the minimum gray scale value;

and determining the sum value of the first product and the second product as an initial brightness value of a backlight partition corresponding to the image partition.

In a second aspect, the present disclosure provides a display device comprising: the backlight control apparatus of any one of the first aspects.

In a third aspect, the present disclosure provides a backlight control method, including:

determining an initial brightness value of each backlight partition of the backlight source based on gray scale information of each image partition of the current frame image; the image partitions and the backlight partitions are in one-to-one correspondence;

for each backlight subarea, performing adaptive spatial filtering on an initial brightness value of the backlight subarea to obtain a spatial filtering value of the backlight subarea;

performing adaptive time domain filtering on the spatial filtering value of the backlight partition to obtain a first brightness value of the backlight partition;

and controlling the brightness of the backlight source based on the first brightness value of each backlight partition.

According to the method for controlling backlight provided by the present disclosure, adaptive spatial filtering is performed on an initial brightness value of the backlight partition to obtain a spatial filtering value of the backlight partition, including:

Determining a preset area taking the backlight partition as a center;

According to the backlight control method provided by the present disclosure, the determining, based on the difference value and the position of each backlight partition in the preset area, a filter factor corresponding to each backlight partition in the preset area includes:

According to the backlight control method provided by the disclosure, adaptive time domain filtering is performed on the spatial filtering value of the backlight partition to obtain a first brightness value of the backlight partition, which comprises the following steps:

According to the method for controlling backlight provided by the present disclosure, the controlling, by a backlight driving chip, the brightness of the backlight source based on the first brightness value of each backlight partition includes:

and providing the second brightness value of each backlight partition for the backlight driving chip so as to provide the second brightness value of each backlight partition for the backlight driving chip through the backlight driving chip, and controlling the brightness of the backlight source through the backlight driving chip based on the second brightness value of each backlight partition.

According to the method for controlling backlight provided by the present disclosure, the performing backlight enhancement on the first luminance value of each backlight partition to obtain the second luminance value of each backlight partition includes:

According to the backlight control method provided by the disclosure, the method further comprises the following steps: and compensating the gray scale value of each pixel in the current frame image based on the second brightness value of each backlight partition to obtain a target image corresponding to the current frame image, wherein the target image is displayed under the condition that the backlight enhancement module controls the brightness of the backlight source through the backlight driving chip.

According to the backlight control method provided by the present disclosure, gray scale values of pixels in the current frame image are compensated based on second brightness values of backlight partitions, so as to obtain a target image corresponding to the current frame image, including:

According to the method for controlling backlight provided by the present disclosure, the determining, based on the second luminance value of each backlight partition, the target luminance value of each pixel includes:

According to the method for controlling backlight provided by the present disclosure, the compensating the gray-scale value of each pixel in the current frame image based on the target brightness value of each pixel to obtain a target image corresponding to the current frame image includes:

According to the backlight control method provided by the disclosure, the gray scale information of the image partition comprises gray scale values of pixels in the image partition;

based on gray scale information of an image partition, determining an initial brightness value of a backlight partition corresponding to the image partition comprises:

According to the method for controlling backlight provided by the present disclosure, the determining the initial brightness value of the backlight partition corresponding to the image partition based on the maximum gray level value, the minimum gray level value and the average gray level value of the image partition includes:

In a fourth aspect, the present disclosure also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the backlight control method as in any one of the third aspects above when executing the program.

In a fifth aspect, the present disclosure also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the backlight control method as in any of the third aspects above.

According to the backlight control device, method and equipment provided by the disclosure, the adaptive spatial filtering module is used for performing adaptive spatial filtering on the initial brightness value of the backlight subarea to obtain the spatial filtering value of the backlight subarea; performing adaptive time domain filtering on the spatial filtering value of the backlight partition through an adaptive time domain filtering module to obtain a first brightness value of the backlight partition; the backlight enhancement module is used for controlling the brightness of the backlight source through the backlight driving chip based on the first brightness value of each backlight partition, so that on one hand, the effect of halation caused by overlarge brightness difference of adjacent backlight partitions can be reduced, and meanwhile, the problem of display effect reduction caused by artificial preset filter factors can be avoided; on the other hand, when continuous certain frame images in the input video stream data have obvious changes, the first brightness value of the backlight partition is controlled to synchronously change in time, so that the flicker phenomenon caused by overlarge brightness difference of adjacent frames is reduced, and the display effect of the picture is improved.

Drawings

In order to more clearly illustrate the present disclosure or the prior art solutions, a brief description will be given below of the drawings that are needed in the embodiments or prior art descriptions, it being apparent that the drawings in the following description are some embodiments of the present disclosure and that other drawings may be obtained from these drawings without inventive effort to a person of ordinary skill in the art.

Fig. 1 is a schematic structural view of a display device provided by the present disclosure;

FIG. 2 is a flow chart of a backlight control method provided by the present disclosure;

FIG. 3 is a flow chart of a method for obtaining spatial filter values of backlight partitions provided by the present disclosure;

FIG. 4 is a schematic illustration of a preset zone provided by the present disclosure;

FIG. 5 is a flow chart of a method for obtaining a first luminance value of a backlight partition provided by the present disclosure;

FIG. 6 is a flowchart of a method for obtaining a second luminance value for each backlight partition provided by the present disclosure;

FIG. 7 is a flowchart of a method for obtaining a target image corresponding to a current frame image provided in the present disclosure;

FIG. 8 is a flowchart of a method for determining initial luminance values of a backlight partition corresponding to an image partition provided by the present disclosure;

FIG. 9 is one of the schematic structural diagrams of the backlight control apparatus provided by the present disclosure;

FIG. 10 is a second schematic diagram of a backlight control apparatus according to the present disclosure;

fig. 11 is a schematic diagram of the physical structure of an electronic device provided in the present disclosure.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the present disclosure more apparent, the technical solutions in the present disclosure will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are some, but not all, embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

In the present disclosure, the term "include" and variations thereof may refer to non-limiting inclusion; the term "or" and variations thereof may refer to "and/or". The terms "first," "second," and the like in this disclosure are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. In this disclosure, "at least one" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

First, a structure of a display device according to the present disclosure will be described with reference to fig. 1.

Fig. 1 is a schematic structural view of a display device provided by the present disclosure. As shown in fig. 1, the display device includes: the backlight control device comprises a backlight control device, an image quality processing module, a pixel rearrangement module, a backlight driving chip, a backlight source (positioned in a backlight module), a panel driving chip and a liquid crystal panel.

In the case where the display device acquires video stream data, the video stream data is input to the backlight control apparatus.

The backlight control device processes the video stream data to obtain backlight data and image data, inputs the backlight data to the backlight driving chip and inputs the image data to the image quality processing module.

The backlight driving chip controls the brightness of the backlight source through the backlight driving chip based on the backlight data and a pulse width modulation (Pulse Width Modulation, PWM) technology when receiving the backlight data.

When receiving the image data, the image quality processing module processes the image data based on technologies such as Color Correction (Color Correction), motion compensation (Motion Compensation), remapping and the like to obtain processed image data, inputs the processed image data to the pixel rearrangement module, performs pixel rearrangement processing on the processed image data to obtain rearranged image data, inputs the rearranged image data to the panel driving chip, and the panel driving chip controls the liquid crystal panel to display an image based on the rearranged image data.

In the related art, a backlight control device processes video stream data to obtain backlight data, so that when a backlight driving chip controls the brightness of a backlight source based on the backlight data, a frame displayed by a liquid crystal panel has a halation phenomenon and a flickering problem, resulting in poor display effect of the frame.

In order to improve the display effect of the screen, the present disclosure provides a backlight control method that may be executed by the backlight control apparatus, and the backlight control method provided by the present disclosure is described below with reference to fig. 2.

Fig. 2 is a schematic flow chart of a backlight control method provided in the present disclosure. As shown in fig. 2, the method includes:

step 201, determining an initial brightness value of each backlight partition in the backlight source based on gray scale information of each image partition of the current frame image; each image partition corresponds to each backlight partition one by one.

Alternatively, the execution subject of the backlight control method provided by the present disclosure may be an electronic device, or may be a backlight control apparatus provided in the electronic device. The backlight control means may be implemented by a combination of software and/or hardware.

The current frame image is a frame image which is currently required to be processed and displayed in the input video stream data. The length of the video stream data may be, for example, 8 bits.

Specifically, the current frame image is divided based on the resolution of the current frame image and the resolution of the backlight source, and each image partition is obtained.

For example, when the resolution of the current frame image is 3840×2160 and the resolution of the backlight is 24×16, the number of image partitions is 24×16, and the size of each image partition is 160×135 (i.e., (3840/24) × (2160/16)).

Alternatively, there may be overlapping regions between image partitions.

Alternatively, the backlight may be a light-emitting diode (LED) light source.

The total number of backlight partitions corresponds to the resolution of the backlight.

For example, in the case where the resolution of the current frame image is 3840×2160 and the resolution of the backlight is 24×16, the total number of backlight partitions is 24×16.

Step 202, for each backlight partition, performing adaptive spatial filtering on the initial brightness value of the backlight partition to obtain a spatial filtering value of the backlight partition.

In the method, the spatial filtering value of the backlight subarea is obtained through the self-adaptive spatial filtering, so that the effect of a halation phenomenon caused by overlarge brightness difference of adjacent backlight subareas can be reduced, and meanwhile, the problem of display effect reduction caused by artificial preset filtering factors can be avoided.

Step 203, performing adaptive time domain filtering on the space domain filtering value to obtain a first brightness value of the backlight partition.

In the method, the first brightness value of the backlight partition is obtained through self-adaptive time domain filtering, and when continuous certain frame images in the input video stream data are changed obviously, the first brightness value of the backlight partition is controlled to be changed synchronously in time, so that flicker (flicker) caused by overlarge brightness difference of adjacent frames is reduced, and adjustability is improved.

Step 204, controlling the brightness of the backlight source by the backlight driving chip based on the first brightness value of each backlight partition.

In the present disclosure, an initial luminance value of a backlight partition is processed through adaptive spatial filtering to obtain a spatial filtering value of the backlight partition, the spatial filtering value is processed through adaptive temporal filtering to obtain a first luminance value of the backlight partition, and based on the first luminance value of each backlight partition, the luminance of a backlight source is controlled through a backlight driving chip, so that on one hand, the effect of halation caused by overlarge luminance phase difference of adjacent backlight partitions can be reduced, and meanwhile, the problem of display effect reduction caused by artificial preset filtering factors can be avoided; on the other hand, when continuous certain frame images in the input video stream data have obvious changes, the first brightness value of the backlight partition is controlled to synchronously change in time, so that the flickering phenomenon caused by overlarge brightness difference of adjacent frames is reduced, and the display effect of pictures is further improved.

Further, for each frame of image in the video data stream, the method provided in fig. 2 can be adopted, and the backlight driving chip is used for controlling the brightness of the backlight source, so that the purpose of dynamically controlling the brightness of the backlight source through the backlight driving chip is achieved, and the display effect of the picture is further improved.

On the basis of the above embodiment, the spatial filtering values for obtaining backlight partitions will be described with reference to fig. 3.

Fig. 3 is a flowchart of a method for obtaining spatial filtering values of backlight partitions according to the present disclosure. As shown in fig. 3, the method includes:

step 301, determining a preset area with the backlight partition as the center.

The preset area is described below with reference to fig. 4.

Fig. 4 is a schematic view of a preset area provided by the present disclosure. As shown in fig. 4, taking k=3 as an example, the preset area centered on the backlight partition (i, j) includes 3×3 backlight partitions.

Step 302, determining the difference value of the initial brightness values of all backlight partitions in the preset area.

Alternatively, the difference value may be a variance, a standard deviation, or the like.

For example, in the case that the difference value is a variance, determining a mean value based on initial luminance values of all backlight partitions in a preset area; based on the mean, a variance is determined.

Step 303, determining a filter factor corresponding to each backlight partition in the preset area based on the difference value and the position of each backlight partition in the preset area.

In some embodiments, step 303 may include:

determining a second adjusting factor corresponding to the backlight subarea based on the position of the backlight subarea in the preset area and the first adjusting factor aiming at each backlight subarea in the preset area;

determining the sum value of second adjusting factors corresponding to each backlight partition in a preset area;

and determining the ratio of the second adjusting factor of the backlight partition to the sum value as a filtering factor corresponding to the backlight partition aiming at each backlight partition in the preset area.

Alternatively, the first adjustment factor is determined by the following equation 1:

σ＝a*σ _i,j equation 1;

wherein sigma represents a first adjustment factor, a represents a first preset value, sigma _i,j And representing the difference value of the initial brightness values of all backlight partitions in the preset area.

In this disclosure, i ε [0, bl _w ) Bl_w represents the number of backlight partitions of the backlight in the horizontal direction, j e [0, bl_h), and bl_h represents the number of backlight partitions of the backlight in the vertical direction.

Optionally, the position of the backlight partition in the preset area and the first adjustment factor are processed through formula 2, so as to obtain a second adjustment factor corresponding to the backlight partition.

Wherein, the liquid crystal display device comprises a liquid crystal display device,representing a second tone corresponding to a backlight partition (m, n) in a preset area centered on the backlight partition (i, j)The pitch factor, m, n, represents the position of the backlight partition (m, n) in the preset area, pi represents the circumference ratio, e represents the natural constant,representing a rounding down operation, k representing the length and/or width of the preset area.

Based on the above formula 2, the sum of the second adjustment factors corresponding to the backlight partitions may be expressed as:

optionally, the filter factor corresponding to the backlight partition is determined by the following formula 3:

wherein, the liquid crystal display device comprises a liquid crystal display device,and representing the filter factors corresponding to the backlight partitions (m, n) in the preset area taking the backlight partition (i, j) as the center.

In the method, the filter factors corresponding to the backlight partitions in the preset area are determined based on the difference values and the positions of the backlight partitions in the preset area, so that the problem of display effect reduction caused by manually setting the filter factors can be avoided.

Step 304, based on the filter factors corresponding to the backlight partitions in the preset area, performing adaptive spatial filtering on the initial brightness values of the backlight partitions in the preset area to obtain spatial filtering values of the backlight partitions.

Alternatively, the spatial filter value of the backlight partition is determined by the following equation 4:

where bl' (i, j) represents the spatial filter value of the backlight partition, x represents the convolutionIn the operation of the device, representing backlight partition +.>Is included in the display device).

In the method, the adaptive spatial filtering module is used for carrying out adaptive spatial filtering on the initial brightness value of the backlight subarea to obtain the spatial filtering value of the backlight subarea, so that the halo phenomenon caused by overlarge difference of the brightness values of the adjacent backlight subareas can be reduced, and the display effect of a picture is improved.

On the basis of the above embodiment, the first luminance value of the resulting backlight partition will be described below with reference to fig. 5.

Fig. 5 is a flowchart of a method for obtaining a first luminance value of a backlight partition provided in the present disclosure. As shown in fig. 5, the method includes:

step 501, obtaining K reference spatial filter values corresponding to backlight partitions; the K reference spatial filtering values are obtained based on the previous K frame images of the current frame image, and K is an integer greater than or equal to 1.

The K reference spatial filtering values are in one-to-one correspondence with the previous K frame images.

For each frame of image in the previous K frames of images, the process of obtaining the reference spatial filtering value corresponding to the backlight partition is shown in the embodiment of fig. 3, and will not be described herein again.

Optionally, after obtaining K reference spatial filtering values corresponding to the backlight partition, the K reference spatial filtering values corresponding to the backlight partition may be stored in a storage module in the display device, and in the case of executing step 501, the K reference spatial filtering values corresponding to the backlight partition are obtained from the storage module.

Step 502, determining smoothing factors corresponding to (k+1) frame images on the backlight partition based on the spatial filtering values of the backlight partition and K reference spatial filtering values, wherein the (k+1) frame images comprise a current frame image and a previous K frame image.

Alternatively, the smoothing factor corresponding to each of the (k+1) frame images on the backlight partition may be determined by the following formula 5:

wherein, the liquid crystal display device comprises a liquid crystal display device,t-th represented in (K+1) -th frame image on backlight partition (i, j) ₀ -normalized spatial filter value corresponding to t frame image, ->Represented by the t-th on backlight partition (i, j) ₀ -spatial filtering values corresponding to the t frame images,representing the spatial filter value of the current frame image over backlight partition (i, j) (i.e. the spatial filter value of the backlight partition),representing the smoothing factor for each of the (k+1) frame images on backlight partition (i, j).

Note that, in the case of t=0, the t-th _o The t-frame image is the current frame image, where t=1, the t-th frame image ₀ -the t frame image is the previous frame image to the current frame image. In the case of t +.0,k reference spatial filter values corresponding to backlight partitions are represented, and in the case of t=0, < ->Representing spatial filter values of backlight partitions.

Step 503, performing adaptive time domain filtering on the spatial filtering value of the backlight partition and the K reference spatial filtering values based on the smoothing factors corresponding to the (k+1) frame images, to obtain a first brightness value of the backlight partition.

Alternatively, adaptive time domain filtering may be implemented by equation 6:

wherein, the liquid crystal display device comprises a liquid crystal display device,representing the current frame t ₀ A first luminance value of a backlight partition (i, j) corresponding to the image.

In the method, based on the smoothing factors corresponding to the (K+1) frame images, adaptive time domain filtering is performed on the spatial filtering values of the backlight subareas and the K reference spatial filtering values to obtain the first brightness values of the backlight subareas, and the first brightness values of the backlight subareas can be controlled to synchronously change in time under the condition that continuous certain frame images in video stream data have obvious changes, so that the flicker phenomenon caused by overlarge brightness differences of adjacent frame images is reduced, and the display effect of pictures is further improved.

In some embodiments, controlling the brightness of the backlight source by the backlight driving chip based on the first brightness value of each backlight partition comprises:

Performing backlight enhancement on the first brightness value of each backlight partition to obtain the second brightness value of each backlight partition;

the second brightness value of each backlight partition is provided for the backlight driving chip so as to control the brightness of the backlight source based on the second brightness value of each backlight partition through the backlight driving chip.

For a detailed description of obtaining the second luminance value of each backlight partition, please refer to the embodiment of fig. 6.

In the present disclosure, the first luminance value of each backlight partition is enhanced by backlight, so as to obtain the second luminance value of each backlight partition, and based on the second luminance value of each backlight partition, the luminance of the backlight source is controlled by the backlight driving chip, so that the luminance of the backlight partition corresponding to the image partition with brighter luminance can be enhanced under the condition that the luminance of the backlight partition corresponding to the image partition with darker luminance is unchanged, so that the contrast range of image display is larger, and further, the contrast of image display is improved, and the display effect of a picture is improved.

Further, in the prior art, the backlight enhancement is performed first, and then the time domain filtering treatment is performed, so that the treatment effect of the backlight enhancement is greatly weakened.

A method of obtaining the second luminance value of each backlight section will be described with reference to fig. 6.

Fig. 6 is a flowchart of a method for obtaining a second luminance value of each backlight partition provided in the present disclosure. As shown in fig. 6, the method includes:

and 601, mapping and encoding the first brightness value of each backlight partition based on preset attribute parameters to obtain a third brightness value of each backlight partition.

Alternatively, the preset attribute parameters may include voltage, power, refractive characteristics of liquid crystal molecules, and the like of the display device.

Alternatively, a Look-Up-Table (LUT) method, and a polynomial calculation method may be used to obtain the third luminance value of the backlight partition.

For example, in the case of using the LUT method, the luminance value of the backlight partition in the backlight domain is searched in the LUT table based on the first luminance value of the backlight partition, and the searched luminance value is determined as the third luminance value of the backlight partition, wherein the LUT table includes the correspondence between the first luminance value of the backlight partition and the luminance value of the backlight partition in the backlight domain.

For example, in the case of using a polynomial calculation method, based on the first luminance value of the backlight partition, the luminance value of the backlight partition in the backlight domain is searched in the LUT table, and the luminance value of the backlight partition in the backlight domain is processed by using a preset polynomial to obtain the third luminance value of the backlight partition.

Step 602, determining a backlight brightness gain based on a preset backlight brightness maximum value and a third brightness value of each backlight partition.

Alternatively, the backlight luminance gain is determined by the following formula 7:

wherein gain represents backlight brightness gain, init_bl_int _max Representing a preset backlight luminance maximum, bl_int (i, j) represents a third luminance value of the backlight partition (i, j), mean (bl_int (i, j)) represents an average value of the third luminance values of the respective backlight partitions, and mean (·) represents an averaging operation.

Step 603, determining an adjustment gain of each backlight partition based on the backlight brightness gain, the backlight brightness threshold and the third brightness value of each backlight partition.

Alternatively, the adjustment gain for each backlight partition is determined by equation 8 as follows:

wherein m is _{bl_int(i,j)} Representing the adjustment gain of the backlight partition (i, j), max_bl_int representing the maximum luminance value of the third luminance values of the respective backlight partition of the light source, f (bl_int (i, j), max_nl_int) representing the mapping of nl_int (i, j) to [0,1 ] based on max_bl_int]And th represents the backlight brightness threshold.

Step 604, determining the product of the adjustment gain and the third brightness value of each backlight partition as the fourth brightness value of each backlight partition.

Step 605, determining a second luminance value of each backlight partition based on the fourth luminance value of each backlight partition and a preset maximum backlight luminance value.

Alternatively, the second luminance value of the backlight partition can be obtained by equation 9:

nl_int′(i,j)＝CLIP(m _{bl_int(i,j)} ×bl_int(i,j),0,init_bl_int _max ) Equation 9;

where bl_int' (i, j) represents the second luminance value of the backlight partition (i, j), init_bl_int _max Represents a preset backlight brightness maximum value, m _{nl_int(i,j)} X bl_int (i, j) represents the fourth luminance value of the backlight partition (i, j), and CLIP represents the value-taking operation.

Specifically, the CLIP is configured to determine the second luminance value as 0 when the fourth luminance value is less than 0, and determine the second luminance value as 0 when the fourth luminance value is greater than init_bl_int _max In the case of (a), the second luminance value is determined as init_bl_int _nax 。

In some embodiments, a backlight control method provided by the present disclosure further includes:

and compensating the gray scale value of each pixel in the current frame image based on the second brightness value of each backlight partition to obtain a target image corresponding to the current frame image, wherein the target image is displayed under the condition that the backlight enhancement module controls the brightness of the backlight source through the backlight driving chip.

In the method, the gray scale value of each pixel in the current frame image is compensated based on the second brightness value of each backlight partition, so that a target image corresponding to the current frame image is obtained, the problem that the brightness value of the adjacent backlight partition jumps can be avoided, and the display effect of a picture is improved.

On the basis of the above embodiment, the following describes obtaining a target image corresponding to a current frame image with reference to fig. 7.

Fig. 7 is a flowchart of a method for obtaining a target image corresponding to a current frame image provided in the present disclosure. As shown in fig. 7, the method includes:

step 701, determining a target brightness value of each pixel based on the second brightness value of each backlight partition.

In some embodiments, step 701 specifically includes:

determining light diffusion influence factors of backlight partitions corresponding to the mapping blocks on pixels based on the positions of the pixels and the positions of the mapping blocks for each pixel; determining an initial brightness value of the pixel based on the light diffusion influence factor and a second brightness value of the backlight partition corresponding to the mapping partition;

Wherein the first resolution is less than the second resolution, e.g., the first resolution is 3840×2160 and the second resolution is 384×216.

Alternatively, the light diffusion influence factor is determined by the following formula 10:

wherein, the liquid crystal display device comprises a liquid crystal display device,represents a light diffusion influence factor of a backlight partition (i, j) corresponding to the mapping block (x, y) on the pixel, ρ represents a third preset value, for controlling the light diffusion range, β represents a fourth preset value, for controlling the light diffusion intensity, δ represents a fifth preset value, +.>Indicating a sixth preset value.

Alternatively, the initial luminance value of the pixel is determined by the following formula 11:

wherein pl_int _x,y Representing the initial luminance value of a pixel in the map partition (x, y), bl_int' (i, j) represents the second luminance of the backlight partition (i, j)And (5) a degree value.

Alternatively, a gaussian filter or an average filter or the like may be employed to smooth the initial luminance value of each pixel.

Alternatively, the intermediate luminance value of each pixel may be upsampled from the second resolution to the first resolution using a bilinear difference method, a cubic interpolation method, or the like.

In the method, the initial brightness value of each pixel is subjected to smooth filtering to obtain the intermediate brightness value of each pixel, so that the problem that the brightness value of the adjacent backlight partition jumps can be avoided, the phenomenon of moire of the finally displayed image is avoided, and the display effect of a picture is improved.

Step 702, compensating the gray-scale value of each pixel based on the target brightness value of each pixel, so as to obtain a target image corresponding to the current frame image.

The target image is displayed with the backlight driving chip controlling the brightness of the backlight. The target image is the image data received by the image quality processing module.

In some embodiments, step 702 specifically includes:

Optionally, constructing a preset list according to the rule that the display brightness of each pixel before and after the backlight is changed is the same, wherein the preset list comprises the corresponding relation between the gray scale value of each pixel and the gray scale compensation coefficient of each pixel; and searching the gray-scale compensation coefficient of each pixel in a preset list based on the gray-scale value of each pixel.

Specifically, the rule that the display brightness of each pixel is the same before and after the backlight has changed can be expressed by the following formula 12:

wherein, the liquid crystal display device comprises a liquid crystal display device,representing a preset luminance value of a pixel (p, q) in case the backlight value (i.e. the luminance value of the backlight partition) is constant (i.e. before there is a change in the backlight), pl_int' _p,q Representing a target luminance value, data, for a pixel (p, q) in the case where the backlight value is non-constant (i.e., before and after the backlight has been changed) _p,q A gray-scale value, data ', representing a pixel (p, q) in the case where the backlight value is constant' _p,q Represents the Gray-scale value of the pixel (p, q) in the case where the backlight value is non-constant, gamma represents a preset parameter, gray _max The preset maximum gray-scale value (the value can be 255, 4095, etc.).

Based on formula 12, data 'can be obtained' _p,q And data _p,q The following relationship between:

data′ _p,q ＝Gain _p,q ×data _p,q ；

wherein, gain _p,q The gray-scale compensation coefficient representing the pixel (p, q).

Further, based on data' _p,q And data _p,q And (5) constructing a preset list according to the relation between the two.

A method of determining the initial luminance value of the backlight partition corresponding to the image partition is described below with reference to fig. 8.

Fig. 8 is a flowchart of a method for determining an initial brightness value of a backlight partition corresponding to an image partition provided in the present disclosure. As shown in fig. 8, the method includes:

step 801, determining a maximum gray-scale value, a minimum gray-scale value and an average gray-scale value of an image partition based on gray-scale values of pixels in the image partition included in gray-scale information of the image partition.

The maximum gray-scale value is the maximum value of the gray-scale values of a plurality of pixels, and the plurality of pixels are all pixels included in the image partition.

The minimum gray-scale value is the minimum value among the gray-scale values of the plurality of pixels.

The average gray-scale value is an average of gray-scale values of a plurality of pixels.

Step 802, determining an initial brightness value of a backlight partition corresponding to the image partition based on the maximum gray level value, the minimum gray level value and the average gray level value of the image partition.

In some embodiments, step 802 specifically includes:

determining a weighting factor based on the gray level threshold, and the maximum gray level value, the minimum gray level value and the average gray level value of the image partition;

and determining the sum value of the first product and the second product as an initial brightness value of the backlight partition corresponding to the image partition.

Optionally, the gray-scale threshold is a preset gray-scale value.

Alternatively, the gray-scale threshold, the maximum gray-scale value, the minimum gray-scale value, and the average gray-scale value of the image partition may be processed by equation 13 to obtain the weighting factor.

Wherein α represents a weighting factor, data _mean Represents the average gray scale value, data _min Representing the minimum gray scale value, data _max Represents the maximum gray level value, data _t h represents a gray level threshold.

Alternatively, the initial luminance value is determined by the following equation 14:

bl＝α*data _max +(c-α)*data _min equation 14;

wherein bl represents an initial luminance value, α data _max Represents a first product, (c- α) data _min Representing a second product and c representing a second preset value.

Alternatively, the second preset value may be 1 or the like.

The backlight control apparatus provided by the present disclosure will be described below, and the backlight control apparatus described below and the backlight control method described above may be referred to correspondingly to each other.

Fig. 9 is a schematic structural diagram of a backlight control apparatus provided in the present disclosure. As shown in fig. 9, the backlight control apparatus includes: a backlight extraction module 910, an adaptive spatial filtering module 920, an adaptive temporal filtering module 930, and a backlight enhancement module 940.

A backlight extraction module 910, configured to determine an initial luminance value of each backlight partition of the backlight source based on gray-scale information of each image partition of the current frame image; each image partition corresponds to each backlight partition one by one;

the adaptive spatial filtering module 920 is configured to perform adaptive spatial filtering on the initial brightness value of the backlight partition for each backlight partition, to obtain a spatial filtering value of the backlight partition;

the adaptive time domain filtering module 930 is configured to perform adaptive time domain filtering on the spatial domain filtering value to obtain a first luminance value of the backlight partition;

The backlight enhancement module 940 is configured to control the brightness of the backlight source through the backlight driving chip based on the first brightness value of each backlight partition.

In the present disclosure, an adaptive spatial filtering module 920 is adopted to perform adaptive spatial filtering on an initial brightness value of a backlight partition, so as to obtain a spatial filtering value of the backlight partition; the adaptive time domain filtering module 930 is adopted to perform adaptive time domain filtering on the spatial filtering value of the backlight partition to obtain a first brightness value of the backlight partition, so that the effect of halation caused by overlarge brightness difference of adjacent backlight partitions can be reduced, and meanwhile, the problem of display effect reduction caused by manual preset filtering factors can be avoided.

Further, for each frame of image in the video data stream, the device provided in fig. 9 can be adopted, and the backlight driving chip is used for controlling the brightness of the backlight source, so that the purpose of dynamically controlling the brightness of the backlight source through the backlight driving chip is achieved, and the display effect of the picture is further improved.

In some embodiments, the adaptive spatial filtering module 920 performs adaptive spatial filtering on the initial luminance value of the backlight partition to obtain a spatial filtered value of the backlight partition, including:

Determining a preset area taking a backlight partition as a center;

determining the difference value of the initial brightness values of all backlight partitions in a preset area;

In some embodiments, determining the filter factor corresponding to each backlight partition in the preset area based on the difference value and the position of each backlight partition in the preset area, includes:

In some embodiments, the adaptive temporal filtering module 930 performs adaptive temporal filtering on the spatial filtered values of the backlight partition to obtain a first luminance value of the backlight partition, including:

obtaining K reference spatial filter values corresponding to the backlight partitions; k reference spatial filtering values are obtained based on the previous K frame images of the current frame image, wherein K is an integer greater than or equal to 1;

determining smoothing factors corresponding to (K+1) frame images on the backlight subarea based on the spatial filtering values of the backlight subarea and K reference spatial filtering values; wherein the (K+1) frame image includes a current frame image and a previous K frame image;

and performing adaptive time domain filtering on the spatial filtering value of the backlight partition and K reference spatial filtering values based on the smoothing factors corresponding to the (K+1) frame images respectively to obtain a first brightness value of the backlight partition.

In the method, based on the smoothing factors corresponding to (K+1) frame images, adaptive time domain filtering is performed on the spatial filtering values of the backlight subareas and K reference spatial filtering values to obtain the first brightness values of the backlight subareas, so that when continuous certain frame images (not just front and rear frame images) are obviously changed in input video stream data, the first brightness values of the backlight subareas are controlled to be synchronously changed in time, the controllability is higher, flicker phenomenon caused by overlarge brightness difference of adjacent frames is reduced, and the display effect of pictures is further improved.

In some embodiments, the backlight enhancement module 940 controls the brightness of the backlight source through the backlight driving chip based on the first brightness value of each backlight partition, including:

and controlling the brightness of the backlight source through the backlight driving chip based on the second brightness value of each backlight partition.

Optionally, the backlight enhancement module 940 includes: and a backlight enhancement unit and a backlight driving chip.

The backlight enhancement unit is used for carrying out backlight enhancement on the first brightness value of each backlight partition to obtain the second brightness value of each backlight partition;

and the backlight driving chip is used for providing the second brightness value of each backlight partition to the backlight driving chip so as to control the brightness of the backlight source based on the second brightness value of each backlight partition through the backlight driving chip.

In the present disclosure, by adding the backlight enhancement module 940, the brightness value of the brighter region of the image can be made larger while the power consumption is reduced, so that the contrast ratio of the image is further increased, and the display effect and the visual effect of the picture are further improved.

In addition, in the present disclosure, the adaptive spatial filtering is performed by the adaptive spatial filtering module 920, then the adaptive temporal filtering is performed by the adaptive temporal filtering module 930, and then the backlight enhancement is performed by the backlight enhancement module 940, so that the first brightness value input by the backlight enhancement module 940 is smooth, and then the backlight enhancement is performed, so that the contrast can be improved to a greater extent, and the problem that in the prior art, the contrast is improved to a limited extent due to the fact that the prior art performs the backlight enhancement and then the spatial filtering is avoided.

Furthermore, in the present disclosure, the backlight enhancement module 940 performs backlight enhancement on the luminance value of the backlight partition instead of performing enhancement processing on the pixel value, so that the luminance of the backlight partition corresponding to the image partition with brighter luminance can be enhanced under the condition that the luminance of the backlight partition corresponding to the image partition with darker luminance is unchanged, so that the contrast range of the image display is larger, and further, the contrast of the image display is improved, thereby improving the display effect of the picture.

In some embodiments, performing backlight enhancement on the first luminance value of each backlight partition to obtain the second luminance value of each backlight partition includes:

mapping and encoding the first brightness value of each backlight partition based on preset attribute parameters to obtain a third brightness value of each backlight partition; determining a backlight brightness gain based on a preset backlight brightness maximum value and a third brightness value of each backlight partition;

determining an adjustment gain for each backlight partition based on the backlight brightness gain, the backlight brightness threshold, and a third brightness value for each backlight partition;

and determining a second brightness value of each backlight partition based on the fourth brightness value of each backlight partition and a preset backlight brightness maximum value.

Optionally, the backlight enhancement unit includes: a backlight encoding subunit, a gain control subunit, and a backlight control subunit.

And the backlight coding subunit performs mapping coding on the first brightness value of each backlight partition based on the preset attribute parameter to obtain a third brightness value of each backlight partition.

And the gain control subunit is used for determining the backlight brightness gain based on the preset backlight brightness maximum value and the third brightness value of each backlight partition.

A backlight control subunit configured to determine a product of the adjustment gain and the third luminance value of each backlight partition as a fourth luminance value of each backlight partition; and determining a second brightness value of each backlight partition based on the fourth brightness value of each backlight partition and a preset backlight brightness maximum value.

Fig. 10 is a second schematic structural diagram of the backlight control device provided by the present disclosure. On the basis of fig. 9, as shown in fig. 10, the backlight control apparatus further includes:

the pixel compensation module 950 is configured to compensate the gray-scale value of each pixel in the current frame image based on the second brightness value of each backlight partition, so as to obtain a target image corresponding to the current frame image, where the target image is displayed under the condition that the backlight enhancement module 940 controls the brightness of the backlight source through the backlight driving chip.

In some embodiments, the pixel compensation module 950 compensates the gray-scale value of each pixel in the current frame image based on the second brightness value of each backlight partition to obtain the target image corresponding to the current frame image, including:

determining a target luminance value for each pixel based on the second luminance value for each backlight partition;

In some embodiments, determining the target luminance value for each pixel based on the second luminance value for each backlight partition comprises:

In some embodiments, compensating the gray scale value of each pixel in the current frame image based on the target brightness value of each pixel to obtain a target image corresponding to the current frame image includes:

In some embodiments, the gray scale information of the image partition includes gray scale values of pixels in the image partition;

the backlight extraction module 910 determines an initial luminance value of each backlight partition in the backlight based on the current frame image, including:

Optionally, the backlight extraction module 910 includes: and a gray-scale information statistics unit and an initial brightness value calculation unit.

The gray level information statistics unit is used for determining a maximum gray level value, a minimum gray level value and an average gray level value of the image partition based on the gray level value of each pixel in the image partition.

The initial brightness value calculating unit is used for determining the initial brightness value of the backlight partition corresponding to the image partition based on the maximum gray level value, the minimum gray level value and the average gray level value of the image partition.

In some embodiments, determining an initial luminance value of a backlight partition corresponding to an image partition based on a maximum gray level value, a minimum gray level value, and an average gray level value of the image partition includes:

The present disclosure provides a display apparatus including: the backlight control apparatus according to any one of the above embodiments.

It should be noted that, the display device provided in the embodiment of the present disclosure can implement all the method steps implemented in the embodiment of the method and achieve the same technical effects, and the same parts and beneficial effects as those of the embodiment of the method in the embodiment are not described in detail herein.

Fig. 11 is a schematic diagram of the physical structure of an electronic device provided in the present disclosure. As shown in fig. 11, the electronic device may include: a processor 1110, a communication interface Communications Interface 1120, a memory 1130, and a communication bus 1140. Wherein the processor 1110, the communication interface 1120, and the memory 1130 communicate with each other via a communication bus 1140. Processor 1110 may invoke logic instructions in memory 1130 to perform a backlight control method comprising: determining an initial brightness value of each backlight partition of the backlight source based on gray scale information of each image partition of the current frame image; each image partition corresponds to each backlight partition one by one; for each backlight partition, performing adaptive spatial filtering on an initial brightness value of the backlight partition to obtain a spatial filtering value of the backlight partition; performing adaptive time domain filtering on the spatial domain filtering value to obtain a first brightness value of the backlight partition; and controlling the brightness of the backlight source through the backlight driving chip based on the first brightness value of each backlight partition.

Further, the logic instructions in the memory 1130 described above may be implemented in the form of software functional units and sold or used as a stand-alone product, stored on a computer-readable storage medium. Based on such understanding, the technical solution of the present disclosure may be embodied in essence or a part contributing to the prior art or a part of the technical solution, or in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present disclosure. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or the like, each of which can store a program code.

In yet another aspect, the present disclosure also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the backlight control method provided by the above methods, the method comprising: determining an initial brightness value of each backlight partition of the backlight source based on gray scale information of each image partition of the current frame image; each image partition corresponds to each backlight partition one by one; for each backlight partition, performing adaptive spatial filtering on an initial brightness value of the backlight partition to obtain a spatial filtering value of the backlight partition; performing adaptive time domain filtering on the spatial domain filtering value to obtain a first brightness value of the backlight partition; and controlling the brightness of the backlight source through the backlight driving chip based on the first brightness value of each backlight partition.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present disclosure, and are not limiting thereof; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.

Claims

1. A backlight control apparatus, comprising:

2. The backlight control apparatus of claim 1, wherein the adaptive spatial filtering module performs adaptive spatial filtering on the initial luminance value of the backlight partition to obtain a spatial filtered value of the backlight partition, comprising:

determining a preset area taking the backlight partition as a center;

3. The backlight control apparatus according to claim 2, wherein the determining a filter factor corresponding to each backlight partition in the preset area based on the difference value and a position of each backlight partition in the preset area, comprises:

4. A backlight control apparatus according to any one of claims 1 to 3, wherein the adaptive temporal filtering module performs adaptive temporal filtering on spatial filtering values of the backlight partition to obtain a first luminance value of the backlight partition, comprising:

5. A backlight control apparatus according to any one of claims 1 to 3, wherein the backlight enhancement module controls the brightness of the backlight source by a backlight driving chip based on the first brightness value of each backlight section, comprising:

6. The backlight control apparatus of claim 5, wherein the performing backlight enhancement on the first luminance value of each backlight partition to obtain the second luminance value of each backlight partition comprises:

7. A backlight control device as claimed in claim 5, further comprising:

and the pixel compensation module is used for compensating the gray scale value of each pixel in the current frame image based on the second brightness value of each backlight partition to obtain a target image corresponding to the current frame image, and the target image is displayed under the condition that the backlight driving chip controls the brightness of the backlight source.

8. The backlight control apparatus according to claim 7, wherein the pixel compensation module compensates gray-scale values of pixels in the current frame image based on the second luminance values of each backlight partition to obtain a target image corresponding to the current frame image, comprising:

9. The backlight control apparatus of claim 8, wherein the determining the target luminance value for each pixel based on the second luminance value for each backlight partition comprises:

10. The backlight control apparatus according to claim 8, wherein the compensating the gray-scale value of each pixel based on the target brightness value of each pixel to obtain the target image corresponding to the current frame image comprises:

11. A backlight control apparatus according to any one of claims 1 to 3, wherein the gray-scale information of the image partition includes gray-scale values of pixels in the image partition;

12. The backlight control apparatus of claim 11, wherein the determining the initial luminance value of the backlight partition corresponding to the image partition based on the maximum gray level value, the minimum gray level value, and the average gray level value of the image partition comprises:

13. A display device, characterized by comprising: the backlight control apparatus of any one of claims 1 to 12.

14. A backlight control method, comprising:

15. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the backlight control method of claim 14 when the program is executed by the processor.

16. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the backlight control method according to claim 14.