Backlight control method and device and display equipment

Abstract

The invention provides a backlight control method and device and display equipment. The method comprises the steps of obtaining current frame display data; according to the current frame display data and the partition sequence of the backlight module, current light-emitting control parameters corresponding to the current partition are obtained, and the current light-emitting control parameters are sent to a backlight driving module; wherein each partition at least comprises a row of light-emitting units of the backlight module; after the current light-emitting control parameter is sent to a 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 the partitions are sequentially obtained; wherein when the next light-emitting control parameter corresponding to the next subarea is obtained, the backlight driving module controls the state of the light-emitting unit in the current subarea in the backlight module according to the received current light-emitting control parameter. According to the mode, the data is subjected to partition processing, so that the data processing speed is increased, delay is reduced, and the display effect is improved.

Description

Technical Field

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

[0002] The basic principle of LCD (Liquid Crystal Display) is to use liquid crystal molecules to change their arrangement state under the action of an electric field, thereby controlling the degree of backlight transmittance to achieve image display. Therefore, the backlight plays a key role in the contrast and color saturation of LCD displays. With the continuous development of the display industry, various technologies to improve display effects have emerged in an endless stream. In the past few years, MiniLED (Miniature Light-Emitting Diode) technology has quickly become popular with its powerful advantages. With its higher resolution, contrast, color gamut and other characteristics, it has been widely used in both direct display and backlight markets. MiniLED backlight technology is becoming an important development direction of LCD display technology with its advantages in display effects, ultra-thin design and cost control. However, since MiniLED backlight products have the problem of matching backlight with display screen, how to solve the matching of backlight and display has become an important issue. Summary of the invention

[0003] The main purpose of this application is to provide a backlight control method, device and display equipment to solve the problem of delay and mismatch between backlight control and picture display in the display panel, so as to improve the processing and transmission speed of backlight data, improve the matching degree between 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, which is applied to a display device, and the backlight control method includes: obtaining current frame display data; according to the current frame display data, according to the partition order of the backlight module, obtaining the current light-emitting control parameters corresponding to the current partition, and sending the current light-emitting control parameters to the backlight driving module; wherein each partition includes at least one row of light-emitting units of the backlight module; after sending the current light-emitting control parameters to the backlight driving module, obtaining the next light-emitting control parameters corresponding to the next partition, and sending the next light-emitting control parameters to the backlight driving module, until the light-emitting control parameters corresponding to all partitions are obtained in turn; wherein, when obtaining the next light-emitting control parameters corresponding to the next partition, the backlight driving module controls the state of the light-emitting units in the current partition of the backlight module according to the received current light-emitting control parameters.

[0005] In one embodiment, the light emitting control parameters include: grayscale information of each light emitting unit in each partition, and control timing of each light emitting unit in each partition.

[0006] In one embodiment, obtaining the current light control parameters corresponding to the current partition includes: obtaining grayscale 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 based on the grayscale information of each light-emitting unit.

[0007] In one embodiment, the luminous control parameters also include brightness levels, and obtaining the current luminous control parameters corresponding to the current partition also includes: obtaining the brightness level of each luminous unit based on the grayscale information of each luminous unit in each partition; wherein the brightness level is positively correlated with the brightness of the luminous unit.

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

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

[0010] In one embodiment, the processing module includes: a processor and a backlight control chip; the light control parameters include: grayscale information of each light-emitting unit in each partition, and control timing of each light-emitting unit in each partition; the processor is used to obtain current frame display data; according to the current frame display data, according to the partition order of the backlight module, the grayscale information of each light-emitting unit in each partition corresponding to the current partition is obtained; the backlight control chip is used to determine the control timing of each light-emitting unit in each partition according to the grayscale information of each light-emitting unit in each partition corresponding to the current partition.

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

[0012] In one embodiment, the light control parameter also includes a brightness level, and the processor is used to obtain the brightness level of each light-emitting unit according to 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.

[0013] In order to solve the above problems, the present application also provides a display device, which includes a 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 process and output the luminous control parameters of the backlight module in the above manner, and obtain the luminous control parameters of the next partition while controlling the state of the luminous unit in one partition. In the form of partitioning, the picture data of a frame is divided into multiple partitions, which reduces the data size of the processor in a single task, thereby increasing the processing speed of the picture data and reducing the delay between the picture display and the backlight luminescence, thereby achieving the purpose of improving the matching degree between the picture display and the backlight luminescence and improving the display effect of the picture. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them: Figure 1 It is a schematic diagram of the steps of an embodiment of a backlight control method provided by the present application; Figure 2 yes Figure 1 Schematic diagram of the sub-step flow chart of step S20; Figure 3 is a structural schematic diagram of an embodiment of a backlight control device provided by the present application; Figure 4 It is the backlight display principle diagram provided by this application; Figure 5 It is a structural schematic diagram of an embodiment of a display device provided in the present application.

[0016] Figure Number: 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

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0018] The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0019] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] With the gradual development of LCD (liquid crystal display), MiniLED has become an important development direction with its advantages in display effect, ultra-thin design and cost control. 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 the traditional LCD screen, reduces the size of the LED chip to less than 100 microns, and makes a high-density LED array as the backlight source of the LCD display. By using a large number of smaller LED chips, more screen backlight partitions can be achieved, thereby achieving higher peak brightness and better color performance.

[0021] In the process of MiniLED backlight display, Local Dimming Technology is usually used. The core of Local Dimming Technology is to divide the backlight source into multiple independently controlled areas or blocks. Each block can be analyzed in real time by the processor and dynamically adjust the brightness independently according to the needs of the display content. For example, when displaying a night scene, the dimming area corresponding to the sky part will reduce the brightness, or even completely turn off the backlight beads to present a deep black; while for the dimming area of ​​the bright parts such as stars or lights in the picture, the brightness will be increased to make it brighter and more eye-catching, so that the light and dark contrast of the picture is stronger and the details are richer. However, in the process of its processing, there is a delay between the output of the picture display and the backlight emission, which will cause problems such as unsmooth picture display, affecting the display effect.

[0022] To solve the above problems, the present application provides a backlight control method, which is applied to a display device. Figure 1 As shown, Figure 1 1 is a schematic diagram of a step flow of an embodiment of a backlight control method provided by the present application; specifically, the backlight control method comprises the following steps: Step S10: Acquire current frame display data.

[0023] During the backlight display process, when the SOC (System on Chip) in the display device outputs the picture to be displayed, it will pass all the frame display data to Tcon (Timing Controller), and Tcon will then transmit the received information to the MCU (Microcontroller Unit) inside the device for analysis and processing. Through the principle of line-by-line scanning and line-by-line display, the picture display information is parsed into backlight display information (that is, which areas control the light emission and which areas control the non-light emission), and then the information is passed to Bcon (Backlight Controller) that controls the backlight output timing, and then Bcon outputs the timing control signal to Led Driver, and finally Led Driver controls the LED lamp beads to emit light, and synchronously Tcon transmits the picture information processing to SourceDriver, and Source Driver controls the picture output to the surface, and then with the backlight display, the picture can be displayed normally.

[0024] Among them, further explanations of the above terms include: SOC is a chip that integrates multiple functional modules, responsible for running the UI system, processing input signals, decoding audio and video, and outputting video signals. In the display system, the signal output by the SOC usually needs to be further converted into a signal for driving the panel. Tcon is the main control chip of the display module, responsible for managing the timing control of the display panel, converting the digital signal output by the SOC (such as LVDS, eDP, etc.) into a signal suitable for driving the panel and generating scanning signals and gate signals for panel driving to ensure that the pixels are refreshed according to the correct timing. Bcon is a chip for controlling the backlight, mainly used in MiniLED backlight systems, controlling the brightness and partition dimming of the backlight, and realizing local dimming functions. LED Driver is a circuit or chip for driving LEDs. In the MiniLED backlight system, the LED Driver is responsible for providing a stable current for the LED lamp beads. Source Driver is a driver chip for controlling the pixel data input of the display panel, converting the digital signal into an analog voltage signal, and loading it onto the pixel points of the panel, controlling the brightness, grayscale and color of the pixel, and cooperating with the Gate Driver to realize line-by-line scanning and image update.

[0025] It can be understood that after obtaining the current frame display data, the above process will process and analyze the data of the entire display frame, and control the display based on the analysis results. Due to the different processing speeds in 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.

[0026] Step S20: according to the current frame display data and the partition order of the backlight module, obtain the current light control parameters corresponding to the current partition, and send the current light control parameters to the backlight driving module; wherein each partition includes at least one row of light-emitting units of the backlight module.

[0027] It can be understood that in the scheme of the present application, after obtaining the current frame display data, the entire frame is no longer processed by various modules before being transmitted to the next level. Instead, the backlight module is partitioned to divide the entire frame into multiple different sub-areas, and part of the frame data in the sub-area is processed before being transmitted to the next level.

[0028] According to the partitioning order of the backlight module, for example, in one embodiment, the area of ​​the backlight module is divided into four partitions, each of which corresponds to a part of the lamp beads and includes all the lamp beads in a row in the lateral direction of the partition.

[0029] After obtaining the current frame display data, the current frame display data is analyzed row by row to confirm whether the grayscale of the sub-pixels in each row is greater than 0. In the light-emitting unit, the light-emitting unit corresponding to the sub-pixel with a grayscale greater than 0 needs to be displayed, and the corresponding backlight needs to emit light. Corresponding to the 4 partitions that have been divided, after the analysis of the 1st to 540th rows is completed and it is confirmed which light-emitting units in the 540 rows in the area need to display and emit light, the data is output to the next level Bcon. After receiving the corresponding data, Bcon starts to output the control timing to the Led Driver according to the received data, and controls the backlight module to emit light through the Led Driver. (That is, the process of obtaining the current light-emitting control parameters corresponding to the current partition and sending the current light-emitting control parameters to the backlight driver module).

[0030] In one embodiment, the light emitting control parameters include: grayscale information of each light emitting unit in each partition, and control timing of each light emitting unit in each partition.

[0031] The grayscale information represents the different levels of brightness from the darkest to the brightest in display technology. The more grayscale levels there are, the smoother the color transition and the more delicate the picture effect. Control timing refers to managing and coordinating the time sequence and signal synchronization of the operations of various components in the display system. It ensures that the drive signal, data transmission, refresh operation, etc. of the display panel are carried out in a precise time sequence, so as to achieve the correct display of the image.

[0032] In one embodiment, if Figure 2 As shown, Figure 2 yes Figure 1 Schematic diagram of the sub-step flow of step S20; specifically, the step S20 of obtaining the current light control parameter corresponding to the current partition includes the following sub-steps: Step S21: obtaining grayscale information of each light-emitting unit in the current partition.

[0033] In the workflow of screen display, the SOC in the display device transmits the screen to be displayed to Tcon, which is the process of obtaining the current frame display data. It can be understood that in one embodiment, Tcon is used to analyze the data line by line and obtain the grayscale information therein. According to the grayscale information therein, it is determined whether the light-emitting unit therein needs to emit light for display.

[0034] Step S22: acquiring the control timing of each light-emitting unit in each partition corresponding to the current partition according to the grayscale information of each light-emitting unit.

[0035] In another embodiment, after Tcon acquires the grayscale information of each light-emitting unit, the data is transmitted to Bcon, and Bcon outputs the control timing to the light-emitting driving module according to the grayscale information transmitted by Tcon.

[0036] In one embodiment, the luminous control parameters also include brightness levels, and obtaining the current luminous control parameters corresponding to the current partition also includes: obtaining the brightness level of each luminous unit based on the grayscale information of each luminous unit in each partition; wherein the brightness level is positively correlated with the brightness of the luminous unit.

[0037] It can be understood that in the process of liquid crystal display, the control timing output by Bcon only needs to control the brightness or darkness of the corresponding light-emitting unit, wherein the brightness of the light-emitting unit is controlled by the deflection of the liquid crystal through the grayscale output. As can be seen from the above, in this application, in order to obtain a better picture display effect, since the light control parameters of the current frame display data have been obtained, and the light control parameters include the grayscale information of each light-emitting unit. Therefore, the grayscale can be compared and confirmed through the analyzed data, and the light-emitting unit can be divided into different display brightness levels according to the grayscale information. In a specific embodiment, according to the grayscale data of 0-64, the output brightness of the light-emitting unit is controlled to be the first brightness level L1 (defined as 1250nits); according to the grayscale data of 65-128, the output brightness of the light-emitting unit is controlled to be the second brightness level L2 (defined as 2500nits); according to the grayscale data of 128-192, the output brightness of the light-emitting unit is controlled to be the third brightness level L3 (defined as 3750nits); according to the grayscale data of 192-255, the output brightness of the light-emitting unit is controlled to be the fourth brightness level L4 (defined as 5000nits). The brightness level is divided into 4 levels in the above manner. When the MCU in the device confirms which interval level the grayscale of the current light-emitting unit belongs to, it directly controls the light-emitting unit position of the corresponding sub-pixel to output the brightness level corresponding to the L1-L4 levels. Nit is the unit of brightness. 1nit is equal to 1cd / m². It is used to measure the brightness of display screens or other luminous surfaces. For example, 1250nits means that the brightness of the display device reaches 1250 candelas per square meter (cd / m²).

[0038] Step S30: After sending the current light-emitting control parameter 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 partitions are obtained in sequence; wherein, when obtaining the next light-emitting control parameter corresponding to the next partition, the backlight driving module controls the state of the light-emitting unit in the current partition of the backlight module according to the received current light-emitting control parameter.

[0039] It is understandable that for the MCU, the amount of data processed and the length of time for data processing are not linearly related or proportional, but the less data, the faster the processing. Overall, partition processing will be several times faster than the whole frame processing speed. Therefore, the partition control method is adopted in the present application scheme to achieve the purpose of increasing the data processing speed, thereby reducing the delay between the screen display and the backlight emission, and improving the screen display effect.

[0040] In one embodiment, the backlight control method further includes: when acquiring the next light control parameter corresponding to the next partition, the backlight driving module controls the state of the light-emitting unit in the current partition of the backlight module according to the brightness level and control timing in the received current light control parameter.

[0041] To solve the above problems, the present application also provides a backlight control device 100, see Figure 3 As shown, Figure 3 It is a structural schematic diagram of an embodiment of a backlight control device provided by the present application; the backlight control device 100 includes: a processing module 10 and a backlight driving module 20; wherein the processing module 10 is used to obtain current frame display data; according to the current frame display data, according to the partition order of the backlight module (not shown), obtain the current light control parameter corresponding to the current partition, and send the current light control parameter to the backlight driving module 20; wherein each partition includes at least one row of light-emitting units of the backlight module (not shown); and after sending the current light control parameter to the backlight driving module 20, obtain the next light control parameter corresponding to the next partition, and send the next light control parameter to the backlight driving module 20, until the light control parameters corresponding to all partitions are obtained in sequence; the backlight driving module 20 is used to control the state of the light-emitting unit in the current partition of the backlight module (not shown) according to the received current light control parameter when the processing module 10 obtains the next light control parameter corresponding to the next partition.

[0042] In one embodiment, the processing module 10 includes: a processor and a backlight control chip; the light control parameters include: grayscale information of each light-emitting unit in each partition, and the control timing of each light-emitting unit in each partition; the processor is used to obtain the current frame display data; according to the current frame display data, according to the partition order of the backlight module, the grayscale information of each light-emitting unit in each partition corresponding to the current partition is obtained; the backlight control chip is used to determine the control timing of each light-emitting unit in each partition according to the grayscale information of each light-emitting unit in each partition corresponding to the current partition.

[0043] Corresponding to the description in the above-mentioned embodiments, in one embodiment, the processor includes a Tcon timing controller, wherein the Tcon is integrated with an MCU control chip so as to obtain the grayscale information of each light-emitting unit in each partition corresponding to the current partition through the MCU control chip.

[0044] In one embodiment, the processor and the backlight control chip are integrated into the same integrated circuit.

[0045] By combining the above embodiments Figure 4 To explain, Figure 4 It is a backlight display principle diagram provided by the present application; the system chip 31 (i.e., SOC chip) transmits the picture frame data to be displayed to the timing controller 32 (i.e., Tcon), and the timing controller analyzes and processes the received picture frame data line by line, and obtains grayscale information, and transmits the processed data to the LCD liquid crystal display panel 33 and the micro control unit 34 (i.e., MCU chip) respectively, and finally uses the micro control unit 34 and the backlight controller 35 (i.e., Bcon) to output the timing control information to the driver 36 (Driver, i.e., the LED driver in the above embodiment) part, and controls the light-emitting state of the backlight module 30 through driving.

[0046] In one embodiment, the MCU chip and Tcon are integrated into the same integrated circuit, and the backlight display is controlled directly through the backlight control chip after data processing. In another embodiment, the MCU and Bcon (in one embodiment, Bcon is the backlight control chip in this application) are integrated into the same integrated circuit, and Tcon directly transmits the received data to the next-level MCU and Bcon integrated circuit for processing without processing. After the internal integrated MCU completes the processing, the data is directly received through Bcon and transmitted to the next level, so that the internal processing at the same level saves the transmission of the signal on the line and improves the data processing speed.

[0047] It is understandable that in order to make the backlight data processing speed faster, we can integrate MCU and Bcon into the same IC. Because the backlight itself requires timing control, it can be achieved as long as the MCU is integrated in Bcon. In this way, the SOC data is given to Tcon, and Tcon can transmit it directly to Bcon without processing. After the MCU inside Bcon completes the processing, Bcon directly receives the data and transmits it to the next level. Processing within the same level eliminates the transmission of signals on the line and also improves the data processing speed.

[0048] In one embodiment, the light control parameter also includes a brightness level, and the processor is used to obtain the brightness level of each light-emitting unit according to 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.

[0049] To solve the above problems, the present application also provides a display device 200, such as Figure 5 As shown, Figure 5 is a schematic structural diagram of an embodiment of a display device 200 provided in the present application; the display device 200 includes a backlight control device 100 as described in any one of the above embodiments.

[0050] The backlight control method provided in the present application is applied to a display device 200, and the backlight control method includes: obtaining current frame display data; according to the current frame display data, according to the partition order of the backlight module 30, obtaining the current light-emitting control parameter corresponding to the current partition, and sending the current light-emitting control parameter to the backlight driving module 20; wherein each partition includes at least one row of light-emitting units of the backlight module 30; after sending the current light-emitting control parameter to the backlight driving module 20, obtaining the next light-emitting control parameter corresponding to the next partition, and sending the next light-emitting control parameter to the backlight driving module 20, until the light-emitting control parameters corresponding to all partitions are obtained in turn; wherein, when obtaining the next light-emitting control parameter corresponding to the next partition, the backlight driving module 20 controls the state of the light-emitting unit in the current partition of the backlight module 30 according to the received current light-emitting control parameter.

[0051] In the above manner, the light control parameters of the backlight module are processed and outputted in partitions, and the light control parameters of the next partition are obtained while the state of the light-emitting unit in one partition is controlled. In the form of partitions, the picture data of one frame is divided into multiple partitions, which reduces the data size of the processor in a single task, thereby increasing the processing speed of the picture data and reducing the delay between the picture display and the backlight emission, thereby achieving an improvement in the matching degree between the picture display and the backlight emission, and improving the display effect of the picture.

[0052] The embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A backlight control method, characterized in that: Applied to a display device, the backlight control method comprises: Get the current frame display data; According to the current frame display data, according to the partition order of the backlight module, the current light control parameter corresponding to the current partition is obtained, and the current light control parameter is sent to the backlight driving module; wherein each partition includes at least one row of light-emitting units of the backlight module; After sending the current light control parameter to the backlight driving module, obtaining a next light control parameter corresponding to the next partition, and sending the next light control parameter to the backlight driving module, until the light control parameters corresponding to all partitions are obtained in sequence; When acquiring the next light emitting control parameter corresponding to the next partition, the backlight driving module controls the state of the light emitting unit in the current partition of the backlight module according to the received current light emitting control parameter.

2. The backlight control method according to claim 1, characterized in that: The light emitting control parameters include: grayscale information of each light emitting unit in each partition, and control timing of each light emitting unit in each partition.

3. The backlight control method according to claim 2, characterized in that: The obtaining of the current light emitting control parameter corresponding to the current partition includes: Obtain the grayscale information of each light-emitting unit in the current partition; According to the grayscale information of each light-emitting unit, a control timing of each light-emitting unit in each partition corresponding to the current partition is obtained.

4. The backlight control method according to claim 3, characterized in that: The light control parameter also includes a brightness level, and the step of obtaining the current light control parameter corresponding to the current partition also includes: According to the grayscale information of each light-emitting unit in each partition, 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.

5. The backlight control method according to claim 4, characterized in that: The backlight control method further includes: When acquiring the next light control parameter corresponding to the next partition, the backlight driving module controls the state of the light-emitting unit in the current partition of the backlight module according to the brightness level and the control timing in the received current light control parameter.

6. A backlight control device, characterized in that: The backlight control device comprises: A processing module, used to obtain current frame display data; according to the current frame display data, according to the partition order of the backlight module, obtain the current light control parameter corresponding to the current partition, and send the current light control parameter to the backlight driving module; wherein each partition includes at least one row of light-emitting units of the backlight module; and after sending the current light control parameter to the backlight driving module, obtaining a next light control parameter corresponding to a next partition, and sending the next light control parameter to the backlight driving module, until the light control parameters corresponding to all partitions are obtained in sequence; The 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 parameter when the processing module obtains the next light-emitting control parameter corresponding to the next partition.

7. The backlight control device according to claim 6, characterized in that: The processing module includes: a processor and a backlight control chip; the light control parameters include: grayscale information of each light-emitting unit in each partition, and control timing of each light-emitting unit in each partition; The processor is used to obtain current frame display data; according to the current frame display data, according to the partition order of the backlight module, obtain the grayscale information of each light-emitting unit in each partition corresponding to the current partition; The backlight control chip is used to determine the control timing of each light emitting unit in each partition according to the grayscale information of each light emitting unit in each partition corresponding to the current partition.

8. The backlight control device according to claim 7, characterized in that: The processor and the backlight control chip are integrated into the same integrated circuit.

9. The backlight control device according to claim 7, characterized in that: The light control parameter also includes a brightness level, and the processor is used to obtain the brightness level of each light-emitting unit according to 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.

10. A display device, characterized in that: The display device comprises the backlight control apparatus as claimed in any one of claims 6 to 9.

Images