Backlight control method, apparatus and display device

Abstract

The application provides a backlight control method, device and display equipment. The method comprises the following steps: acquiring current frame display data; acquiring current light-emitting control parameters corresponding to a current partition according to the current frame display data and the partition order of a backlight module, and sending the current light-emitting control parameters to a backlight driving module; wherein each partition comprises at least one row of light-emitting units of the backlight module; after the current light-emitting control parameters are sent to the backlight driving module, next light-emitting control parameters corresponding to a next partition are acquired, and the next light-emitting control parameters are sent to the backlight driving module until the light-emitting control parameters corresponding to all the partitions are acquired in sequence; wherein when the next light-emitting control parameters corresponding to the next partition are acquired, the backlight driving module controls the state of the light-emitting units in the current partition in the backlight module according to the received current light-emitting control parameters. Through the above method, the data is processed in partitions, so that the data processing speed is improved, the delay is reduced, and the display effect is improved.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the field of display technology, in particular to a backlight control method and device and a display device. BACKGROUND

[0002] The basic principle of an LCD (Liquid Crystal Display) is to use liquid crystal molecules to change the arrangement state under the action of an electric field, thereby controlling the degree of backlight light transmission to realize image display. Therefore, the backlight source plays a key role in the contrast ratio and color saturation of the LCD display. With the continuous development of the display industry, various display effect and technology layers emerge in an endless stream. In the past few years, MiniLED (Miniature Light-Emitting Diode) technology has rapidly outperformed its peers with its strong advantages, and has been widely used in the direct display and backlight markets due to its higher resolution, contrast ratio, color gamut range, and other characteristics. MiniLED backlight technology is becoming an important development direction of LCD display technology due to its advantages in display effect, ultra-thin design, and cost control. However, since the MiniLED backlight product has a backlight and display picture matching problem, how to solve the matching between the backlight and the display has become an important problem. SUMMARY

[0003] The main purpose of the present application is to provide a backlight control method, device and display device to solve the problem of delay between backlight control and picture display in the display panel, and the problem of mismatched picture display, so as to improve the processing and transmission speed of backlight data, improve the matching degree of backlight control and picture display, and thus improve the display effect of the picture.

[0004] To solve the above problems, the present application provides a backlight control method applied to a display device, which comprises: obtaining current frame display data; obtaining current emission control parameters corresponding to a current partition according to the current frame display data and in accordance with the partition order of a backlight module, and sending the current emission control parameters to a backlight driving module; wherein each partition comprises at least one row of light emitting units of the backlight module; after sending the current emission control parameters to the backlight driving module, obtaining next emission control parameters corresponding to a next partition, and sending the next emission control parameters to the backlight driving module until all the emission control parameters corresponding to all the partitions are obtained; wherein when obtaining the next emission control parameters corresponding to the next partition, the backlight driving module controls the state of the light emitting units in the current partition in the backlight module according to the received current emission control parameters.

[0005] In an embodiment, the emission control parameters comprise: gray scale information of each light emitting unit in each partition, and control timing of each light emitting unit in each partition.

[0006] In an embodiment, the current light-emitting control parameter corresponding to the current partition is obtained by: obtaining the gray scale information of each light-emitting unit in the current partition; and obtaining the control timing of each light-emitting unit in each partition corresponding to the current partition according to the gray scale information of each light-emitting unit.

[0007] In an embodiment, the light-emitting control parameter further comprises a brightness level, and the current light-emitting control parameter corresponding to the current partition is obtained by: obtaining the brightness level of each light-emitting unit according to the gray scale information of each light-emitting unit in each partition; and wherein the brightness level is positively correlated with the brightness of the light-emitting unit.

[0008] In an embodiment, the backlight control method further comprises: when the next light-emitting control parameter corresponding to the next partition is obtained, the backlight driving module controls the state of the light-emitting unit in the current partition in the backlight module according to the brightness level and the control timing in the received current light-emitting control parameter.

[0009] To solve the above problems, the present application further provides a backlight control device, which comprises: a processing module, configured to obtain current frame display data; obtain the current light-emitting control parameter corresponding to the current partition according to the current frame display data in the order of the partitions of the backlight module, and send the current light-emitting control parameter to a backlight driving module; wherein each partition comprises at least one row of light-emitting units in the backlight module; and after the current light-emitting control parameter is sent to the backlight driving module, obtain the next light-emitting control parameter corresponding to the next partition, and send the next light-emitting control parameter to the backlight driving module until the light-emitting control parameters corresponding to all the partitions are obtained in turn; and the backlight driving module is configured to control the state of the light-emitting unit in the current partition in the backlight module according to the received current light-emitting control parameter when the processing module obtains the next light-emitting control parameter corresponding to the next partition.

[0010] In an embodiment, the processing module comprises a processor and a backlight control chip; the light-emitting control parameter comprises the gray scale information of each light-emitting unit in each partition and the control timing of each light-emitting unit in each partition; the processor is configured to obtain the current frame display data; and obtain the gray scale information of each light-emitting unit in each partition corresponding to the current partition according to the current frame display data in the order of the partitions of the backlight module; and the backlight control chip is configured to determine the control timing of each light-emitting unit in each partition according to the gray scale information of each light-emitting unit in each partition corresponding to the current partition.

[0011] In an embodiment, the processor and the backlight control chip are integrated in the same integrated circuit.

[0012] In an embodiment, the light emitting control parameter further comprises a brightness level, and the processor is configured to obtain the brightness level of each light emitting unit according to the gray scale information of each light emitting unit in each partition; wherein the brightness level is positively correlated with the brightness of the light emitting unit.

[0013] To solve the above problems, the display device is provided, which comprises the backlight control device as described in any one of the above embodiments.

[0014] The backlight control method, device and display device provided by the present application are used in the above manner to perform partition processing and output on the light emitting control parameter of the backlight module, and the light emitting unit state in one partition is controlled while the light emitting control parameter of the next partition is obtained. In this way, the picture data of one frame is divided into multiple partitions in the form of partitioning, the data size of the processor in a single task is reduced, the processing speed of the picture data is improved, the delay between picture display and backlight light emission is reduced, the matching degree between picture display and backlight light emission is improved, and the display effect of the picture is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort. Among them:

[0016] Figure 1 is a step flowchart of an embodiment of the backlight control method provided by the present application;

[0017] Figure 2 is Figure 1 is a sub-step flowchart of step S20 in

[0018] Figure 3 is a structure diagram of an embodiment of the backlight control device provided by the present application;

[0019] Figure 4 is a backlight display principle diagram provided by the present application;

[0020] Figure 5 is a structure diagram of an embodiment of the display device provided by the present application.

[0021] LIST OF ELEMENTS IN THE DRAWINGS

[0022] 100, backlight control device; 10, processing module; 20, backlight driving module; 30, backlight module; 31, system chip; 32, timing controller; 33, liquid crystal display panel; 34, micro control unit; 35, backlight controller; 36, driver; 200, display device. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only parts related to the present application are shown in the drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0024] The terms “first”, “second”, and the like in the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product, or device.

[0025] Reference to “an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various locations in the specification does not necessarily refer to the same embodiment, nor is it necessary that every embodiment include the particular feature, structure, or characteristic. It will be explicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] With the gradual development of LCD (Liquid Crystal Display), MiniLED has become an important development direction due to its advantages in display effect, ultra-thin design, and control cost. MiniLED products are divided into two categories: MiniLED direct display and MiniLED backlight display products. MiniLED backlight display technology is developed on the basis of LCD technology. It upgrades the LED backlight source in traditional LCD screens by reducing the size of LED chips to less than 100 microns to form a high-density LED array as the backlight source of liquid crystal display. By using a large number of smaller LED chips, more screen backlight partitions are achieved, thereby achieving higher peak brightness and better color performance.

[0027] In the process of Mini LED backlight display, the Local Dimming technology is usually adopted. The core of the Local Dimming technology is to divide the backlight source into multiple independently controlled areas or blocks. Each block can be independently adjusted in brightness by the processor in real time according to the requirements of the display picture content. For example, when a night scene picture is displayed, the light-emitting diode (LED) lamp beads in the light adjustment area corresponding to the sky part are reduced in brightness or even completely turned off to present a deep black color. The light-emitting diode (LED) lamp beads in the light adjustment area corresponding to the bright part such as stars or lights in the picture are increased in brightness to make them more bright and eye-catching, so that the contrast of the picture is more intense and the details are more abundant. However, there is a delay between the output of the picture display and the backlight emission in the process of the Local Dimming technology, which causes the picture display to be not smooth and affects the display effect.

[0028] To solve the above problems, the present application provides a backlight control method applied to a display device, as shown in Figure 1 Figure 1 is a step flowchart of an embodiment of the backlight control method provided by the present application. Specifically, the backlight control method comprises the following steps:

[0029] Step S10: acquiring current frame display data.

[0030] In the process of backlight display, when the SOC (System on Chip) in the display device outputs the picture to be displayed, all the frame display data are transmitted to the Tcon (Timing Controller), and the Tcon transmits the received information to the MCU (Microcontroller Unit) in the device for analysis and processing. According to the principle of line-by-line scanning and display, the picture display information is analyzed into backlight display information (i.e. which areas control light emission and which areas control no light emission), and then the information is transmitted to the Bcon (Backlight Controller) for controlling the backlight output timing. Then, the Bcon outputs the timing control signal to the Led Driver (LED driver), and finally the Led Driver controls the LED lamp beads to emit light. At the same time, the Tcon transmits the picture information processing to the SourceDriver (source driver), and the SourceDriver controls the picture to be output to the inside of the display. Then, the backlight display is completed, and the picture can be normally displayed.

[0031] ​Further explanations of the aforementioned terms include: A System-on-Chip (SOC) is a chip integrating multiple functional modules, responsible for running the UI system, processing input signals, decoding audio and video, and outputting video signals. In a display system, the signal output by the SOC typically needs to be further converted into signals to drive the panel. The Tcon is the main control chip of the display module, responsible for managing the timing control of the display panel, converting the digital signals output by the SOC (such as LVDS, eDP, etc.) into signals suitable for driving the panel, and generating scan and gate signals for panel driving, ensuring that pixels refresh according to the correct timing. A Bcon is a chip used to control the backlight, mainly used in MiniLED backlight systems, controlling the backlight brightness and local dimming to achieve local dimming functionality. An LED Driver is a circuit or chip used to drive LEDs. In a MiniLED backlight system, the LED Driver is responsible for providing a stable current to the LED chips. A Source Driver is a driver chip used to control the pixel data input of the display panel, converting digital signals into analog voltage signals and loading them onto the pixels of the panel, controlling the brightness, grayscale, and color of the pixels, and working with the Gate Driver to achieve progressive scanning and image updates.

[0032] Understandably, after acquiring the display data of the current frame, the above process will process and analyze the data of the entire display frame, and control the display based on the results of the analysis and processing. Due to the different processing speeds of various components, there will be a certain degree of delay in the process of controlling the screen output and the backlight display, resulting in an unsmooth screen display.

[0033] Step S20: Based on the current frame display data, according to the partition order of the backlight module, obtain the current light emission control parameters corresponding to the current partition, and send the current light emission control parameters to the backlight driver module; wherein, each partition includes at least one row of light emission units of the backlight module.

[0034] Understandably, in the solution of this application, after obtaining the display data of the current frame, the entire frame is no longer processed by each module before being transmitted to the next level. Instead, the entire frame is divided into multiple different sub-regions by partitioning the backlight module. The frame data in the sub-regions is processed before being transmitted to the next level.

[0035] In this embodiment, the area of ​​the backlight module is divided into four partitions according to the partitioning order of the backlight module. Each partition includes a portion of the LEDs, and the partitions include all the LEDs in a row in the horizontal direction.

[0036] After acquiring the current frame display data, the data is analyzed line by line to confirm whether the grayscale of each sub-pixel is greater than 0. Only the light-emitting units corresponding to sub-pixels with a grayscale greater than 0 need to be displayed and require corresponding backlight illumination. For the four pre-defined partitions, after analyzing rows 1-540 and confirming which light-emitting units within these 540 rows need to be displayed, the data is output to the next-level Bcon. Upon receiving the corresponding data, the Bcon starts outputting control timing to the LED Driver, which then controls the backlight module to emit light. (This is the process of acquiring the current illumination control parameters for the current partition and sending them to the backlight driver module).

[0037] In one embodiment, the light emission control parameters include: grayscale information of each light emission unit in each partition, and control timing of each light emission unit in each partition.

[0038] Grayscale information represents the different brightness levels from darkest to brightest in display technology. The more grayscale levels, the smoother the color transitions and the more delicate the image effect. Control timing refers to managing and coordinating the time sequence and signal synchronization of the various components in the display system. It ensures that the drive signals, data transmission, and refresh operations of the display panel are performed in a precise time sequence, thereby achieving correct image display.

[0039] In one embodiment, such as Figure 2 As shown, Figure 2 yes Figure 1 A flowchart illustrating the sub-steps of step S20; specifically, regarding obtaining the current light emission control parameters corresponding to the current partition in step S20, the following sub-steps are included:

[0040] Step S21: Obtain the grayscale information of each light-emitting unit in the current partition.

[0041] In the display workflow, the SOC in the display device transmits the image to be displayed to Tcon, which is the process of acquiring the display data of the current frame. Understandably, in one embodiment, Tcon is used to perform line-by-line analysis of the data and obtain grayscale information. Based on the grayscale information, it is determined whether the light-emitting units need to emit light for display.

[0042] Step S22: Based on the grayscale information of each light-emitting unit, obtain the control timing of each light-emitting unit in each partition corresponding to the current partition.

[0043] In another embodiment, after the Tcon obtains the gray scale information of each light emitting unit, the data is transmitted to the Bcon, and the Bcon outputs the control timing to the light emitting driving module according to the gray scale information transmitted by the Tcon.

[0044] In an embodiment, the light emitting control parameter further includes a brightness level, and the current light emitting control parameter corresponding to the current partition is obtained, and the brightness level of each light emitting unit is obtained according to the gray scale information of each light emitting unit in each partition; wherein the brightness level is positively correlated with the brightness of the light emitting unit.

[0045] It can be understood that in the process of liquid crystal display, the control timing output by the Bcon only needs to control the on or off of the corresponding light emitting unit, and the brightness of the light emitting unit is controlled by the deflection of the liquid crystal. As can be seen from the above, in the present application, in order to obtain better picture display effect, the light emitting control parameter of the current frame display data has been obtained, and the light emitting control parameter includes the gray scale information of each light emitting unit. Therefore, the gray scale can be compared and confirmed by analyzing the data, and the light emitting unit is divided into different display brightness levels according to the gray scale information. In a specific embodiment, according to the gray scale data of 0-64, the output brightness of the light emitting unit is controlled to be the first brightness level L1 (defined as 1250 nits); according to the gray scale data of 65-128, the output brightness of the light emitting unit is controlled to be the second brightness level L2 (defined as 2500 nits); according to the gray scale data of 128-192, the output brightness of the light emitting unit is controlled to be the third brightness level L3 (defined as 3750 nits); and according to the gray scale data of 192-255, the output brightness of the light emitting unit is controlled to be the fourth brightness level L4 (defined as 5000 nits). The brightness level is divided into four levels by the above-mentioned method. When the MCU in the device confirms that the gray scale of the current light emitting unit belongs to which interval level, the brightness level corresponding to L1-L4 level can be directly controlled to be output at the position of the corresponding sub-pixel light emitting unit. The nit is the unit of brightness, 1 nit is equal to 1 cd / m², which is used to measure the brightness of the display screen or the surface of other light emitting objects. For example, 1250 nits means that the brightness of the display device reaches 1250 candela per square meter (cd / m²).

[0046] Step S30: After sending the current light emitting control parameter to the backlight driving module, the next light emitting control parameter corresponding to the next partition is obtained, and the next light emitting control parameter is sent to the backlight driving module, until the light emitting control parameters corresponding to all partitions are obtained in turn; wherein when the next light emitting control parameter corresponding to the next partition is obtained, the backlight driving module controls the state of the light emitting unit in the current partition in the backlight module according to the received current light emitting control parameter.

[0047] It can be understood that, for the MCU, the data processing amount and the length of time for data processing are not linearly related or proportional, but the less data is processed, the faster it is processed. Overall, the partition processing will be multiplied by the speed of the whole frame processing, so that the partition control method is used in the scheme to improve the data processing speed, thereby reducing the delay between picture display and backlight emission and improving the picture display effect.

[0048] In an embodiment, the backlight control method further comprises: when the next light emission control parameter corresponding to the next partition is acquired, the backlight driving module controls the state of the light emission unit in the current partition in the backlight module according to the brightness level and the control timing in the received current light emission control parameter.

[0049] To solve the above problems, the application also provides a backlight control device 100, as shown in Figure 3 Figure 3 is a structural schematic diagram of an embodiment of the backlight control device provided by the application; the backlight control device 100 comprises a processing module 10 and a backlight driving module 20; wherein the processing module 10 is used to acquire current frame display data; according to the current frame display data, the current light emission control parameter corresponding to the current partition is acquired according to the partition order of the backlight module (not shown in the figure), and the current light emission control parameter is sent to the backlight driving module 20; wherein each partition at least comprises a row of light emission units of the backlight module (not shown in the figure); and after the current light emission control parameter is sent to the backlight driving module 20, the next light emission control parameter corresponding to the next partition is acquired, and the next light emission control parameter is sent to the backlight driving module 20, until the light emission control parameters corresponding to all partitions are acquired in turn; the backlight driving module 20 is used to control the state of the light emission unit in the current partition in the backlight module (not shown in the figure) according to the received current light emission control parameter when the processing module 10 acquires the next light emission control parameter corresponding to the next partition.

[0050] In an embodiment, the processing module 10 comprises a processor and a backlight control chip; the light emission control parameter comprises the gray scale information of each light emission unit in each partition and the control timing of each light emission unit in each partition; the processor is used to acquire the current frame display data; according to the current frame display data, the gray scale information of each light emission unit in each partition corresponding to the current partition is acquired according to the partition order of the backlight module; the backlight control chip is used to determine the control timing of each light emission unit in each partition according to the gray scale information of each light emission unit in each partition corresponding to the current partition.

[0051] ​According to the description in the above embodiments, in an embodiment, the processor includes a Tcon timing controller, and an MCU control chip is integrated in the Tcon, so that the gray scale information of each light emitting unit in each partition corresponding to the current partition is obtained through the MCU control chip.

[0052] In an embodiment, the processor and the backlight control chip are integrated in the same integrated circuit.

[0053] The above embodiments are described in combination with Figure 4 The above embodiments are described in combination with Figure 4 The above embodiments are described in combination with

[0054] In an embodiment, the MCU chip and the Tcon are integrated in the same integrated circuit, and the backlight display is directly controlled through the data processing and the backlight control chip. In another embodiment, the MCU and the Bcon (in an embodiment, the Bcon is the backlight control chip in the application) are integrated in the same integrated circuit, and the Tcon directly transmits the data to the integrated circuit of the next stage MCU and Bcon for processing after receiving the data. After the processing of the internal integrated MCU is completed, the Bcon directly receives the data and transmits it to the next stage, so that the transmission of the signal on the circuit is saved, and the processing speed of the data is improved.

[0055] It can be understood that, in order to make the backlight data processing faster, the MCU and the Bcon can be integrated into the same IC. Since the backlight itself needs timing control, the MCU can be integrated in the Bcon. Thus, the SOC data is transmitted to the Tcon, the Tcon directly transmits the data to the Bcon without processing, the internal MCU of the Bcon processes the data, the Bcon directly receives the data and transmits it to the next stage, the transmission of the signal on the circuit is saved, and the processing speed of the data is improved.

[0056] In an embodiment, the light emitting control parameter further includes a brightness level, and the processor is configured to obtain the brightness level of each light emitting unit according to the gray scale information of each light emitting unit in each partition; and the brightness level is positively correlated with the brightness of the light emitting unit.

[0057] To solve the above problems, the display device 200 is provided, as shown in Figure 5 Figure 5 is a structural schematic diagram of an embodiment of the display device 200 provided by the present application; the display device 200 comprises the backlight control apparatus 100 described in any one of the above embodiments.

[0058] The backlight control method provided by the present application is applied to the display device 200, and the backlight control method comprises: acquiring current frame display data; acquiring current light-emitting control parameters corresponding to a current partition according to the current frame display data and in the order of the partitions of the backlight module 30, and sending the current light-emitting control parameters to the backlight driving module 20; wherein each partition comprises at least one row of light-emitting units of the backlight module 30; after the current light-emitting control parameters are sent to the backlight driving module 20, next light-emitting control parameters corresponding to a next partition are acquired, and the next light-emitting control parameters are sent to the backlight driving module 20 until light-emitting control parameters corresponding to all the partitions are sequentially acquired; wherein when the next light-emitting control parameters corresponding to the next partition are acquired, the backlight driving module 20 controls the state of the light-emitting units in the current partition in the backlight module 30 according to the received current light-emitting control parameters.

[0059] In the above manner, the light-emitting control parameters of the backlight module are processed and output in the form of partitions, and while the state of the light-emitting units in one partition is controlled, the light-emitting control parameters of the next partition are acquired. In this way, the frame of picture data is divided into multiple partitions in the form of partitions, the data size of the processor in a single task is reduced, and thus the processing speed of the picture data is improved, the delay between the picture display and the backlight light-emitting is reduced, and thus the matching degree between the picture display and the backlight light-emitting is improved, and the display effect of the picture is improved.

[0060] The embodiments of the present application are described in detail above, and the principle and implementation manner of the present application are described by applying specific examples; the above embodiment descriptions are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed, and in view of the above, the content of the specification should not be understood as a limitation of the present application.​

Claims

1. A backlight control method, characterized in that, The backlight control method, applied to display devices, includes: Get the display data of the current frame; Based on the current frame display data, according to the partition order of the backlight module, the grayscale information of each light-emitting unit in the current partition is obtained; based on the grayscale information of each light-emitting unit, the control timing of each light-emitting unit corresponding to the current partition is obtained, and the brightness level of each light-emitting unit is obtained; wherein, the brightness level is positively correlated with the brightness of the light-emitting unit; and the control timing and the brightness level are sent to the backlight driver module as current light emission control parameters; wherein, each partition includes at least one row of light-emitting units of the backlight module; After sending the current light emission control parameters to the backlight driver module, the next light emission control parameters corresponding to the next partition are obtained, and the next light emission control parameters are sent to the backlight driver module, until the light emission control parameters corresponding to all partitions are obtained in sequence; Specifically, when obtaining the next light emission control parameters corresponding to the next partition, the backlight driving module controls the state of the light emission unit in the current partition of the backlight module according to the received current light emission control parameters.

2. The backlight control method according to claim 1, characterized in that, The backlight control method further includes: When obtaining the next light emission control parameters corresponding to the next partition, the backlight driving module controls the state of the light emission unit in the current partition of the backlight module according to the brightness level and control timing in the received current light emission control parameters.

3. A backlight control device, characterized in that, The backlight control device includes: The processing module is used to acquire the current frame display data; according to the current frame display data, according to the partition order of the backlight module, acquire the current light emission control parameters corresponding to the current partition, and send the current light emission control parameters to the backlight driver module; wherein, each partition includes at least one row of light emission units of the backlight module; And after sending the current light emission control parameters to the backlight driver module, obtain the next light emission control parameters corresponding to the next partition, and send the next light emission control parameters to the backlight driver module, until the light emission control parameters corresponding to all partitions are obtained in sequence; A backlight driving module is used to control the state of the light-emitting unit in the current partition of the backlight module according to the received current light-emitting control parameters when the processing module obtains the next light-emitting control parameters corresponding to the next partition. The processing module includes a processor and a backlight control chip; the light emission control parameters include grayscale information of each light emission unit in each partition, and control timing and brightness level of each light emission unit in each partition. The processor is used to acquire the current frame display data; based on the current frame display data, according to the partitioning order of the backlight module, acquire the grayscale information of each light-emitting unit corresponding to the current partition; The backlight control chip is used to determine the control timing of each light-emitting unit in each partition based on the grayscale information of each light-emitting unit corresponding to the current partition. The processor is used to obtain the brightness level of each light-emitting unit based on the grayscale information of each light-emitting unit in each partition; wherein the brightness level is positively correlated with the brightness of the light-emitting unit.

4. The backlight control device according to claim 3, characterized in that, The processor and the backlight control chip are integrated into the same integrated circuit.

5. A display device, characterized in that, The display device includes a backlight control device as described in any one of claims 3-4.

Images