Display device and backlight control method

Abstract

The embodiments of the present disclosure belong to the technical field of display. Provided are a display device and a backlight control method. The display device comprises a processing module, a backlight control module, a backlight source module and a display screen. The processing module is configured to: acquire image data of a target node of a first image frame to be displayed, wherein the image data of the target node is image data of a partial region of the first image frame; update the image data of the target node to a currently displayed second image frame to obtain a third image frame; perform backlight processing on the third image frame to obtain backlight data of the third image frame; and display the third image frame, and send the backlight data of the third image frame to the backlight control module. The backlight control module is configured to control, on the basis of the backlight data of the third image frame, the backlight source module to perform backlight display. By means of the present disclosure, the backlight delay of the display device when displaying an image can be reduced, and the image display quality can be improved.

Description

Display device and backlight control method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese application No. 202410200077.7, filed on February 22, 2024; and No. 202410202358.6, filed on February 23, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The embodiments of the present disclosure relate to the field of display technology, and more particularly to a display device and a backlight control method. Background Art

[0004] When displaying an image, a display device can emit backlight consistent with the displayed image through a backlight panel, thereby improving the image display quality and enhancing the viewing experience. Existing backlight technology processes backlight data after acquiring a complete image frame to obtain backlight data, which can then be used for backlight display. However, existing backlight technology has the problem of backlight display lagging behind image display, resulting in poor image display quality. Summary of the Invention

[0005] In a first aspect, an embodiment of the present disclosure provides a display device, which may include: a processing module, a backlight control module, a backlight source module, and a display screen; the processing module may be configured to: obtain image data of a target node of a first image frame to be displayed; the image data of the target node is image data of a partial area of ​​the first image frame; update the image data of the target node to the currently displayed second image frame to obtain a third image frame; perform backlight processing on the third image frame to obtain backlight data of the third image frame; display the third image frame, and send the backlight data of the third image frame to the backlight control module; the backlight control module may be configured to: control the backlight source module to perform backlight display according to the backlight data of the third image frame.

[0006] In a second aspect, an embodiment of the present disclosure provides a backlight control method, which may include: acquiring image data of a target node of a first image frame to be displayed; the image data of the target node is image data of a partial area of ​​the first image frame; updating the image data of the target node to the currently displayed second image frame to obtain a third image frame; performing backlight processing on the third image frame to obtain backlight data of the third image frame; displaying the third image frame, and sending the backlight data of the third image frame to the backlight control module, so that the backlight control module controls the backlight source module to perform backlight display according to the backlight data of the third image frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG1 is a schematic diagram of the architecture of a display device based on backlight display technology according to some embodiments;

[0008] FIG2 is a schematic flow chart of a backlight control method according to some embodiments;

[0009] FIG3 is a schematic diagram of a backlight control method according to some embodiments;

[0010] FIG4 is another schematic flow chart of a backlight control method according to some embodiments;

[0011] FIG5 is another schematic flow chart of a backlight control method according to some embodiments;

[0012] FIG6 is a schematic diagram of backlight control according to some embodiments;

[0013] FIG7 is a schematic diagram of an implementation scenario of a display device according to some embodiments;

[0014] FIG8 is a schematic structural diagram of a display device according to some embodiments;

[0015] FIG9 is a schematic diagram of a layout of a backlight driving circuit according to some embodiments;

[0016] FIG10 is another schematic diagram of a layout of a backlight driving circuit according to some embodiments;

[0017] FIG11 is a schematic structural diagram of a display device according to some embodiments;

[0018] FIG12 is another schematic structural diagram of a display device according to some embodiments;

[0019] FIG13 is another schematic structural diagram of a display device according to some embodiments;

[0020] FIG14 is another schematic flow chart of a backlight control method according to some embodiments;

[0021] FIG15 is another flowchart of a backlight control method according to some embodiments. DETAILED DESCRIPTION

[0022] FIG1 is a schematic diagram of the architecture of a display device based on backlight display technology according to some embodiments. As shown in FIG1 , the display device may include: a processing module 1 , a backlight control module 2 , a backlight source module 3 , and a display screen 4 .

[0023] The processing module 1 is used to obtain the video stream to be displayed, process the video stream, and then separate the processed video stream into image data and backlight data. The processing module 1 can output the image data to the display screen 4 for display; the processing module 1 can also output the backlight data to the backlight control module 2, so that the backlight control module 2 can illuminate the backlight source module 3 according to the backlight data.

[0024] In some embodiments, the processing module 1 may be, for example, a timing controller (TCON), or a core in which the display device is deployed, such as a system on a chip (SOC). The backlight control module 2 may be, for example, a backlight controller (BCON). The backlight source module 3 may be, for example, a backlight panel, or other electrical device that can serve as a backlight source.

[0025] The display screen 4 may include a liquid crystal display panel. With the development of liquid crystal display technology, different types of liquid crystal display panels have gradually increased. Currently, common liquid crystal display panels include: vertical alignment (VA) liquid crystal display panels, in-plane switching (IPS) liquid crystal display panels, twisted nematic (TN) liquid crystal display panels, etc.

[0026] In traditional processing methods, the process from processing module 1 completing a frame of image processing to generating backlight data for that frame often takes 2-3 frames of time, including acquiring the original backlight data (i.e., a frame of image to be displayed), performing data processing such as spatial and temporal filtering, and transmitting the processed data. As a result, the data actually received by backlight control module 2 corresponds to the backlight data of an image 2-3 frames earlier. Therefore, in certain image display scenarios, especially those with fast motion, the backlight may lag significantly behind the image, reducing the image display quality.

[0027] In view of this, the present disclosure provides a display device in which a processing module 1 divides a complete frame of image into multiple parts and, upon sequentially acquiring image data for any one of the parts, immediately performs backlight data processing on the image data. The backlight control module 2 controls the backlight light source module to display the image corresponding to the backlight data, rather than waiting until a complete frame of image data is received before processing and acquiring the backlight data. In this way, the delay between backlight display and the corresponding image display can be reduced, thereby improving the image display effect.

[0028] The present disclosure does not limit the type of display screen 4 of the display device. The display device may be a display device using a VA-type liquid crystal display screen 4, or may be applied to display devices including other types of display screens 4. Furthermore, the present disclosure does not limit the type of the display device. For example, the display device may be a television, a monitor, a touch panel, a smart electronic panel, a mobile phone, etc.

[0029] 1 , the display device of the present disclosure may include: a processing module 1, a backlight control module 2, a backlight module 3, and a display screen 4. It should be understood that FIG1 only shows a partial structure of the display device, and other structures not related to the present disclosure are not shown.

[0030] Based on the above structure, the present disclosure provides a backlight control method, the execution body of which is processing module 1. Processing module 1 can be a SOC, a TCON, or other image processing device, and the present disclosure does not limit it. Figure 2 is a flow chart of a backlight control method according to some embodiments. As shown in Figure 2, when the display device is to display an image and backlight, the method includes the following steps:

[0031] S301: Acquire image data of a target node of a first image frame to be displayed.

[0032] In this step, the processing module 1 obtains the image data of the target node of the first image frame to be displayed, and then realizes the display of the image data and the backlight display.

[0033] The above-mentioned first image frame can be any frame of image to be displayed in the video stream. The image data of the target node is the image data of a partial area of ​​the first image frame. The target node can be any node of the first image frame. The present disclosure does not limit the way of dividing the nodes. For example, it can be divided according to space (such as the size of the image area) or according to time (such as the duration of image transmission). It also does not limit the number of nodes into which the first image frame is divided. The nodes of the first image frame can be divided equally or unequally.

[0034] In some embodiments, the first image frame may be pre-divided into multiple nodes. Alternatively, when processing module 1 acquires image data of the first image frame that meets image data segmentation parameters, it obtains image data of the target node. The image data segmentation parameters may include, for example, at least one of the following: image transmission duration, image region size, and / or image size.

[0035] In some embodiments, if the total image transmission duration of the first image frame is 0.2ms, then if the image data segmentation parameter includes the image transmission duration, the parameter value may be, for example, 0.1ms, meaning the first image frame can be divided into two nodes. If the total image area size of the first image frame is 40cm*60cm, then the segmentation parameter may be, for example, 20cm*60cm, meaning the first image frame can be divided into two nodes.

[0036] The image data segmentation parameters may include only one of the image transmission duration and the image area size, or both. When both are included, for example, when processing module 1 obtains image data that satisfies either image data segmentation parameter, the obtained image data is used as a target node; or, until both image data segmentation parameters are satisfied, the obtained image data is used as a target node. The "satisfaction" mentioned here may, for example, mean that the amount of image data obtained is greater than or equal to the image data segmentation parameter.

[0037] The processing module 1 may obtain the image data of the target node of the first image frame to be displayed through the network, or obtain the image data of the target node from the storage medium of the display device, or obtain it from other devices, which is not limited in this disclosure.

[0038] S302: Update the image data of the target node to the currently displayed second image frame to obtain a third image frame.

[0039] FIG3 is a schematic diagram of a backlight control method according to some embodiments. As shown in FIG3 , the second image frame is the image frame based on which the backlight display is currently being performed, and can also be considered as the original backlight data of the backlight data currently being displayed. That is, the processing module 1 obtains the backlight data based on which the backlight is currently being displayed based on the second image frame. When the processing module 1 updates the image data of the target node to the currently displayed second image frame and obtains the third image frame, the third image frame is used as the original backlight data for backlight processing.

[0040] S303: Perform backlight processing on the third image frame to obtain backlight data of the third image frame.

[0041] In this step, the processing module 1 performs backlight processing on the third image frame to obtain backlight data of the third image frame, and then backlight control can be performed according to the backlight data of the third image frame.

[0042] The above-mentioned backlight processing may be, for example, data processing such as spatial and temporal filtering required to generate backlight data for the third image frame. The specific implementation method may refer to the existing technology and will not be described in detail here.

[0043] S304 , displaying the third image frame, and sending the backlight data of the third image frame to the backlight control module 2 , so that the backlight control module 2 controls the backlight source module 3 to perform backlight display according to the backlight data of the third image frame.

[0044] In this step, the processing module 1 sends the image data to the display screen 4 so that it displays the third image frame, and sends the backlight data of the third image frame to the backlight control module 2, so that the backlight control module 2 controls the backlight source module 3 to perform backlight display according to the backlight data of the third image frame. As a result, when the display screen 4 displays the third image frame, the backlight source module 3 can perform backlight display accordingly, thereby improving the image display quality.

[0045] In the embodiment of the present disclosure, the processing module 1 obtains the image data of the target node of the first image frame to be displayed; then, the image data of the target node is updated to the second image frame currently displayed to obtain the third image frame; then, the processing module 1 performs backlight processing on the third image frame to obtain the backlight data of the third image frame; subsequently, the control module displays the third image frame, and sends the backlight data of the third image frame to the backlight control module 2, so that the backlight control module 2 controls the backlight source module 3 to perform backlight display. Through the above method, the processing module 1 does not wait until the first image frame is completely acquired before processing a first image frame to be displayed, but after acquiring the image data of the target node of the first image frame, it first performs backlight processing and backlight display according to the image data of the target node. In this way, the waiting time for the pair of image frames can be reduced, the delay of backlight display can be shortened, and the image display effect can be improved.

[0046] In some embodiments, the image segmentation parameters may be preset; for example, the processing module 1 may obtain the image data segmentation parameters according to the attributes of the first image frame and / or the backlight partition division information.

[0047] The attributes of the first image frame may include, for example, any one or more of the size and dimensions of the image frame. In the prior art, backlight partitioning technology is often used to control the backlight of a display device. The backlight partitioning information may include, for example, information such as the backlight partitioning method and the number of partitions.

[0048] In some embodiments, processing module 1 obtains image data segmentation parameters based on attributes of the first image frame. For example, if the attributes of the first image frame include the size of the image frame, processing module 1 can obtain the image data segmentation parameters based on the size of the first image frame and a mapping relationship between the image frame size and the segmentation parameters.

[0049] For example, the processing module 1 may store a mapping relationship between the size of the image frame and the segmentation parameters. The processing module 1 obtains the size of the first image frame according to the first image frame, and then obtains the image data segmentation parameters according to the size of the first image frame and the above mapping relationship.

[0050] In some embodiments, processing module 1 obtains image data segmentation parameters based on the backlight partition division information. For example, processing module 1 may store a mapping relationship between the backlight partition division information and the image data segmentation parameters, and processing module 1 obtains the image data segmentation parameters based on the backlight partition division information and the mapping relationship. Alternatively, processing module 1 may pre-store the number of nodes to be divided for the first image frame. Processing module 1 obtains the image data segmentation parameters based on the backlight partition division information and the preset number of nodes.

[0051] In some embodiments, the backlight partition division information may include, for example, the number of backlight partitions, which may be 100, and the number of nodes, which may be 4. The image data segmentation parameter may be, for example, 100 / 4=25, i.e., after acquiring image data of 25 backlight partitions, the image data of the 25 backlight partitions are used as target nodes for subsequent backlight processing.

[0052] In some embodiments, the processing module 1 may, for example, first obtain the number of nodes of the first image frame according to the attributes of the first image frame and / or backlight partition division information; and then obtain the image data segmentation parameters according to the number of nodes.

[0053] For example, the processing module 1 may store a mapping relationship between the attributes of the first image frame and / or the backlight partition division information and the number of nodes of the first image frame. After obtaining the number of nodes of the first image frame accordingly, the processing module 1 may, for example, calculate and obtain the image data segmentation parameter based on the number of nodes. Taking the number of nodes as 20 as an example, if the size of the first image frame is 20M, the image data segmentation parameter may, for example, be 20M / 20=1M. Alternatively, if the image transmission time of the first image frame is 0.2ms, then the image data segmentation parameter may, for example, be 0.2ms / 20=0.01ms.

[0054] In some embodiments, the processing module 1 can obtain image data segmentation parameters based on the attributes of the first image frame and the backlight partition division information. For example, as shown in Figure 4, Figure 4 is another flowchart of a backlight control method according to some embodiments, which may include the following steps:

[0055] S401: Obtain first initial image data segmentation parameters according to attributes of a first image frame.

[0056] The specific implementation method can refer to the method of obtaining the image data segmentation parameters according to the attributes of the first image frame in the above embodiment, and will not be repeated here.

[0057] S402: Acquire a second initial image data segmentation parameter according to the backlight partition division information.

[0058] The specific implementation of this step can refer to the method of obtaining image data segmentation parameters based on backlight partition division information in the above embodiment, and will not be repeated here.

[0059] S403 : Determine an image data segmentation parameter from the first initial image data segmentation parameter and the second initial image data segmentation parameter.

[0060] In some embodiments, the processing module 1 may use the smaller of the first initial image data segmentation parameter and the second initial image data segmentation parameter as the image data segmentation parameter.

[0061] The smaller the image data segmentation parameter, the smaller the relative backlight delay. Therefore, by selecting the smaller image data segmentation parameter from the two methods described above, the backlight display effect can be further improved, the backlight display delay can be shortened, and the image display quality can be improved.

[0062] Taking a total of 100 backlight partitions, with every 50 backlight partitions as a target node, as an example, a backlight control method for a complete first image frame is described. FIG5 is another flowchart of a backlight control method according to some embodiments, and FIG6 is a schematic diagram of backlight control according to some embodiments; as shown in FIG5 and FIG6, the method may include the following steps:

[0063] S501: Acquire image data of a first target node of a first image frame to be displayed.

[0064] The first target node includes the first 50 backlight subareas of the first image frame acquired sequentially.

[0065] S502: Update the image data of the first target node to the currently displayed second image frame to obtain a third image frame.

[0066] S503, performing backlight processing on the third image frame to obtain backlight data of the third image frame;

[0067] S504 , displaying the third image frame, and sending the backlight data of the third image frame to the backlight control module 2 , so as to control the backlight control module 2 to control the backlight source module 3 to perform backlight display according to the backlight data of the third image frame.

[0068] S505: Acquire image data of the second target node of the first image frame to be displayed.

[0069] The second target node includes the last 50 backlight subareas of the first image frame acquired sequentially.

[0070] S506: Update the image data of the second target node to the currently displayed second image frame to obtain a third image frame.

[0071] It should be understood that the image data content of the second image frame at this time is different from that of the second image frame in the above step S502, but is the same as the image data of the third image frame in the above step S502.

[0072] S507, performing backlight processing on the third image frame to obtain backlight data of the third image frame;

[0073] S508 , displaying the third image frame, and sending the backlight data of the third image frame to the backlight control module 2 , so as to control the backlight control module 2 to control the backlight source module 3 to perform backlight display according to the backlight data of the third image frame.

[0074] It should be understood that the above-mentioned steps S502 and S505 can be executed in parallel, that is, the processing module 1 obtains the image data of the second target node of the first image frame to be displayed while performing backlight processing on the image data of the first target node of the first image frame. Therefore, through the above process, the complete backlight display of the first image frame can be completed in two nodes. For a frame of the first image frame to be displayed, it is not necessary to wait until the first image frame is completely acquired before processing. Instead, after acquiring the image data of the target node of the first image frame, backlight processing and backlight display are first performed according to the image data of the target node. Compared with the method of performing backlight processing on the first image frame after loading a complete first image frame, the above method can shorten the delay of backlight display compared to image display and improve the quality of image display.

[0075] In addition, the backlight driving circuit in the current display device generally adopts the layout of the single-line serial transmission protocol. The layout of the single-line serial transmission protocol has no addressing function and cannot independently control each backlight driving circuit. As a result, the backlight driving circuit and the LED lights controlled by the backlight driving circuit must follow a specific layout to realize their functions, and the control flexibility is poor.

[0076] If you want to realize the addressing function, you need to add an addressing protocol, that is, on the original layout of the backlight driver circuit, add an addressing line for each data path to write the address to the backlight driver circuit. This method will occupy more transmission ports of the main control circuit due to the addition of address lines, and will cause the layout and routing of the light board or light strip PCB (Printed Circuit Board) to be more complicated, and increase the production cost.

[0077] Based on this, the display device provided by the embodiment of the present disclosure may further include: a main control circuit, at least one data path, at least one data transmission line, at least one data path corresponds to at least one data transmission line, and the main control circuit and the data path are connected through the corresponding data transmission line; the data path includes at least one backlight driving circuit, the backlight driving circuit includes an address interface and a data interface, the address interface is used to receive data instructing the backlight driving circuit to write address information, and the data interface is used to receive data instructing the backlight driving circuit to perform backlight control; the backlight driving circuit is configured to: confirm the target interface in the address interface and the data interface based on the instruction data; receive data based on the target interface, and control the backlight driving circuit based on the instruction data. Through the above process, the display device of the embodiment of the present disclosure can independently control each backlight driving circuit, with a simple layout and low cost.

[0078] Figure 7 is a schematic diagram of a display device implementation scenario according to some embodiments. As shown in Figure 7 , the display device 100 is connected to the control device 200 via a signal connection, which can be a wired connection or a wireless connection, and the control device 200 can control the display device 100.

[0079] In some embodiments, the control device 200 can be a remote controller, a mobile terminal, a tablet computer, a computer, a laptop computer, or the like, and no specific limitation is given here.

[0080] The user can control the display device 100 to display images through the control device 200. In some embodiments, the display device can also be connected to a server to communicate with the network and provide richer services.

[0081] In other embodiments, the display device 100 may not be controlled by the control device, but by other methods such as voice control, gesture control, etc.

[0082] FIG8 is a schematic diagram of the structure of a display device according to some embodiments. The display device 100 may include a main control circuit 101, a backlight driving circuit 102, and an LED lamp 103. It should be understood that FIG8 shows only a portion of the structure of the display device 100, not all of it. The structure shown in FIG8 can be used to adjust the backlight of the display device 100.

[0083] In some embodiments, the main control circuit 101 sends control data to the backlight driving circuit 102 so that the backlight driving circuit 102 controls the color and brightness of the LED light 103 .

[0084] In some embodiments, the display device 100 includes multiple backlight driving circuits 102 , and different backlight driving circuits 102 control the backlights of different areas, and can control corresponding LED lights 103 .

[0085] In some embodiments, there may be multiple main control circuits 101 , and different main control circuits 101 may control backlight driving circuits 102 in different areas.

[0086] FIG9 is a schematic diagram of the layout of a backlight driving circuit according to some embodiments. FIG9 takes a main control circuit 101 and multiple backlight driving circuits 102 as an example to illustrate the relevant process of performing layout between the main control circuit 101 and the backlight driving circuit 102 through a single-line serial transmission protocol.

[0087] As shown in FIG9 , the main control circuit 101 connects a plurality of backlight driving circuits 102 in series via a transmission line SDI. For convenience of illustration, M is used to represent the backlight driving circuit 102 in FIG9 , and the subscript of M represents the data path where a backlight driving circuit 102 is located, as well as the arrangement sequence number in the data path; the plurality of backlight driving circuits 102 are divided into m data paths, as shown in FIG9 , where M1,1, M2,1…Mm-1,1 and Mm,1 form a data path, and each data path has n backlight driving circuits 102, and the n backlight driving circuits 102 are connected in series.

[0088] DI and DO in the backlight driving circuit 102 are data interfaces, where DI is the data interface for receiving data and DO is the data interface for sending data. The data interface is used to receive the backlight control data sent by the main control circuit 101, that is, the backlight driving circuit 102 performs backlight control after receiving data through the data interface.

[0089] Of course, the above data of m and n are for illustration only. In some embodiments, the backlight driving circuits 102 between the two data paths may be the same or different.

[0090] The structure shown in FIG9 has the advantage of backlight control in that only one transmission line SDI is needed to control each data path, and the PCB wiring layout of the light board or light strip is relatively simple; and the number of input and output ports occupied by the main control circuit 101 is related to the number of transmission lines SDI, that is, fewer input and output ports (IO ports) of the main control circuit 101 are occupied.

[0091] In some embodiments, the disadvantage of the structure in Figure 9 is that the backlight driving circuit 102 has no addressing function, and the main control circuit 101 cannot independently control each backlight driving circuit 102, so the backlight control flexibility is poor, resulting in the backlight driving circuit 102 and LEDs having to follow a specific layout to achieve specific functions, such as backlight black insertion; at the same time, data is sent serially, and the data sent by the main control circuit 101 needs to pass through each backlight driving circuit 102 in the data path. The data transmission time is long, and the backlight control cannot be performed in time, which may result in poor image display quality of the display device 100; and because the data lines are connected in series, if a backlight driving circuit 102 in the data path fails, the data controlling the backlight cannot be transmitted to the subsequent backlight driving circuit 102, resulting in image display errors on the display device 100.

[0092] Figure 10 is a schematic diagram of the layout of the backlight driving circuit according to some embodiments. Figure 10 takes a main control circuit 101 and multiple backlight driving circuits 102 as an example, and shows the relevant processes of parallel transmission between the main control circuit 101 and the backlight driving circuit 102 and layout based on the addressing protocol.

[0093] As shown in Figure 10, the solid line in the figure is the transmission line SDI, and the dotted line is the addressing line DIS. The backlight driving circuit 102 in a data path is connected in parallel through the transmission line SDI and in series through the addressing line DIS. DIS and DOS in the backlight driving circuit 102 are address interfaces, DIS is the address interface for receiving data input, and DOS is the address interface for transmitting data. The addressing line connection connects the address interfaces of the backlight driving circuit 102 in a data path in series.

[0094] In some embodiments, the main control circuit 101 can send addressing data through the addressing line so that the backlight driving circuit 102 writes the address, and the data line sends backlight control data so that the backlight driving circuit 102 that receives the data performs backlight control. At the same time, since the backlight driving circuit 102 has the address written, each backlight driving circuit 102 can be independently controlled based on the written address information.

[0095] The advantages of the structure in Figure 10 for backlight control are that the backlight driver circuit 102 has an addressing function, allowing independent control of each backlight driver circuit 102, resulting in high flexibility and a rapid R&D and design process. Backlight control data is sent in parallel, shortening data transmission time. However, its disadvantages include requiring not only transmission lines but also addressing lines to control each data path, complicating the PCB routing of the light board or light strip. The addition of addressing lines also occupies more IO ports on the main control circuit 101.

[0096] Based on this, the display device of the embodiment of the present disclosure can use a data transmission line, which can transmit data for controlling the backlight and data for controlling the write address of the backlight driving circuit. At the same time, the data interface and address interface of the backlight driving circuit are configured to detect the data generated by the data transmission line, so as to determine the target interface for receiving the data, and then perform write address information operations or backlight control operations based on the data received by the target interface.

[0097] Specifically, as shown in Figure 11 , the display device may include: a main control circuit 101, at least one data path, and at least one data transmission line SDI / DIS. The at least one data path corresponds to the at least one data transmission line, i.e., one data path corresponds to one data transmission line SDI / DIS. It should be understood that Figure 11 only illustrates a portion of the display device structure for ease of understanding and does not limit the entire structure.

[0098] In some embodiments, the main control circuit 101 is connected to the data path via a data transmission line SDI / DIS, and the main control circuit sends instruction data to the data path via the data transmission line.

[0099] The data transmission line is a multiplexed line, which can send and receive data for instructing the backlight driving circuit to perform backlight control and can also send data for instructing the backlight driving circuit to write address information.

[0100] The data path includes at least one backlight driving circuit 102, which includes a data interface DI and an address interface (DIS, DOS). The address interface is used to receive data instructing the backlight driving circuit to write address information, and the data interface is used to receive data instructing the backlight driving circuit to perform backlight control.

[0101] In the address interface (DIS, DOS), DIS is the address interface for receiving data, DOS is the address interface for transmitting data, and the data interface DI is the interface for receiving data.

[0102] In some embodiments, the data transmission line is connected in parallel to the address interfaces DI of all backlight driving circuits on the data path, that is, the data interfaces of the backlight driving circuits on one data path are connected in parallel, and the address interfaces of the backlight driving circuits on the data path are connected in series, and there is an address interface DIS of the backlight driving circuit connected to the data transmission line, and the address interfaces DIS of the remaining backlight driving circuits are all connected to the address interfaces DOS of the adjacent backlight driving circuits.

[0103] In this way, for a backlight driving circuit in a data path, it can be divided into a first driving circuit and a second driving circuit. The address interfaces of the first driving circuit and the second driving circuit are connected in series. The address interface of the first driving circuit is also connected in series with the data transmission line, while the address interface of the second driving circuit is not connected to the data transmission line.

[0104] In one data path, the number of the first driving circuit is 1, and the number of the second driving circuit is at least one, that is, it may include one or more.

[0105] In some embodiments, for a data path, the sequence number of each backlight driver circuit is obtained based on the arrangement order of the backlight driver circuits. For example, in FIG11 , Mm,n is the mth backlight driver circuit in a data path n. The first driver circuit may be the first or the last backlight driver circuit in the data path.

[0106] In the display device shown in FIG11 , the first backlight driver circuit in its data path is the first driver circuit, and the remaining backlight driver circuits are the second driver circuit. Furthermore, as shown in the structure diagram of the display device in FIG12 , the last backlight driver circuit in its data path is the first driver circuit, and the remaining backlight driver circuits are the second driver circuit. Alternatively, as shown in FIG13 , in a display device, the first backlight driver circuit in some data paths (such as data path 1 and data path 2 in FIG13 ) is the first driver circuit, and the remaining backlight driver circuits are the second driver circuit. Alternatively, in some data paths (such as data path n−1 and data path n in FIG13 ) the last backlight driver circuit in some data paths is the first driver circuit, and the remaining backlight driver circuits are the second driver circuit. As can be seen from FIG11 to FIG13 , the address interface DIS of the first backlight driver circuit is connected to the data transmission line. It should be understood that FIG11 to FIG13 exemplarily illustrate a portion of the structure of the display device, and do not represent the entire structure.

[0107] In some embodiments, the instruction data includes one of data instructing the backlight driver circuit to write address information and data instructing the backlight driver circuit to perform backlight control. The specific content of the instruction data may include a target interface for the backlight driver circuit to receive data. The backlight driver circuit is configured to: identify the target interface between the address interface and the data interface based on the instruction data; receive data based on the target interface; and control the backlight driver circuit based on the instruction data.

[0108] In some embodiments, the instruction data is data that instructs the backlight driving circuit to write address information, then the target interface is the address interface, and the backlight driving circuit can control the target interface to receive data, and the target interface is the address interface DIS. Since the address interface of the backlight driving circuit is connected in series, after the address interface DIS of the backlight driving circuit receives the data, the backlight driving circuit will write the corresponding address information, and then modify the received data, such as deleting the address information written in the data, or deleting one bit of data in the data, indicating that a backlight driving circuit has written the address information, and then transmit the modified data to the next backlight driving circuit through the address interface DOS, so that the next backlight driving circuit writes the address information, until all the backlight driving circuits in the data path write the corresponding address information.

[0109] In some embodiments, the instruction data is data that instructs the backlight driving circuit to write address information, and the target interface is the address interface. The target interface DIS of the first driving circuit will interface the instruction data. The instruction data includes the address information of the backlight driving circuit in the data path. The first driving circuit can write the corresponding address information in the first driving circuit based on the instruction data. At the same time, the information corresponding to the first driving circuit in the instruction data is deleted to obtain the processed instruction data, indicating that the first driving circuit has written the address information.

[0110] Then, the processed information is sent to the second drive circuit adjacent to the first drive circuit through the address interface DOS of the first drive circuit. The address interface DIS of the adjacent second drive circuit receives the data sent by the first drive circuit and performs the same operation as the first drive circuit, writing the corresponding address information and deleting the address information corresponding to the adjacent second drive circuit in the received data.

[0111] In some embodiments, a data bit in the instruction information corresponds to a backlight driving circuit in the data path. After address information is written to a backlight driving circuit, the corresponding data bit in the corresponding instruction information is deleted.

[0112] In some embodiments, the instruction data is data instructing the backlight driving circuit to write address information, then the target interface is the address interface, the address interface DIS of the second driving circuit receives the processed data sent by the address interface DOS of the adjacent backlight driving circuit, and the processed data is obtained after the backlight driving circuit that has written the corresponding address information processes the instruction data. The adjacent backlight driving circuit can be the first driving circuit or the second driving circuit.

[0113] Then, the second driving circuit writes the corresponding address information based on the processed data, and deletes the address information corresponding to the written second driving circuit in the processed data. Then, the data obtained after deleting the processed data is sent to the address interface DIS of the adjacent backlight driving circuit (second driving circuit) through the address interface DOS of the second driving circuit.

[0114] In some embodiments, if the address interface DOS of the second driving circuit is not adjacent to the address interface DIS of another backlight driving circuit, no information is sent through the address interface DOS after the address information is written.

[0115] In some embodiments, the instruction data is data instructing the backlight driving circuit to perform backlight control, and may not distinguish between the first driving circuit and the second driving circuit, and the data processing process of the backlight driving circuit in the data path may be the same.

[0116] In this embodiment, the instruction data is data instructing the backlight driving circuit to perform backlight control, and the target interface is the data interface DI. Each backlight driving circuit in the data path receives the instruction data through the data interface DI and performs backlight control based on the relevant information in the instruction data. Since the instruction data is data instructing the backlight driving circuit to perform backlight control, it can be regarded as that before receiving the instruction data, each backlight driving circuit in the data path has written the address information. Therefore, the instruction data should also include the address information for backlight control. After receiving the instruction information, each backlight driving circuit in the data path determines whether to perform backlight control based on the address information in the instruction information. For example, for a certain data path, the instruction data shows that the second and third backlight driving circuits perform backlight control. Although the backlight driving circuits in the data path will all receive the instruction data, the second and third backlight driving circuits will perform backlight control, and the remaining backlight driving circuits will not perform backlight control.

[0117] In some embodiments, the instruction data may include a check bit, which includes an address check bit and a data check bit. When it is an address check bit, the instruction data is data instructing the backlight driving circuit to write address information. When it is a data check bit, the instruction data is data instructing the backlight driving circuit to perform backlight control. In this way, the target interface can be determined through the check bit.

[0118] In some embodiments, the check bit may be level information, where the level information of the address check bit indicates a high level, and the level information of the data check bit indicates a low level. For example, when the check bit is 1100, the level information is high, i.e., the target interface is the address interface, the address interface can receive data, and the data interface blocks the data (or considers the received data invalid); when the check bit is 0011, the level information is low, i.e., the target interface is the data interface, the data interface can receive data, and the address interface blocks the data (or considers the received data invalid).

[0119] In some embodiments, the check bit can also be used through the backlight driving circuit. For example, when the width of the high level of the check bit is higher than T, that is, the target interface is the address interface, the address interface can receive data, and the data interface blocks the data (or considers the received data invalid); when the width of the low level is higher than T, the target interface is the data interface, the data interface can receive data, and the address interface blocks the data (or considers the received data invalid).

[0120] In some embodiments, it is also possible to determine whether the instruction data is data instructing the backlight driving circuit to write address information or data instructing the backlight driving circuit to perform backlight control based on the timing of the instruction data being sent, thereby obtaining the target interface.

[0121] In some embodiments, the sending timing is the timing of the instruction data sent after the display device is powered on. After the power is turned off and then on again, the sending timing is recalculated accordingly. When performing backlight control, it is necessary to first write the address information in the backlight driving circuit, and then each backlight driving circuit can be independently controlled based on the address information. In this way, when the sending timing is less than the preset timing value, the target interface is confirmed to be the address interface. The preset timing value is 2, that is, when the instruction data is sent for the first time, the instruction data is the data that instructs the backlight driving circuit to write the address information, that is, the target interface is the address interface. When the sending timing is less than the preset timing value, the target interface is confirmed to be the address interface, that is, when the instruction data is sent for the second, third, etc. time, since the instruction data sent for the first time causes the backlight driving circuit to write the address information, the instruction data sent subsequently is the data that instructs the backlight driving circuit to perform backlight control, that is, the target interface is the data interface.

[0122] In the above process, the display device of the embodiment of the present disclosure can send data to the backlight driving circuit through only one data transmission line, that is, data instructing the backlight driving circuit to write address information or data instructing the backlight driving circuit to perform backlight control, so that the address writing and backlight control operations of the backlight driving circuit can be completed through this data transmission line, so that the main control circuit can independently control each backlight driving circuit, the backlight control is highly flexible, and there is no need to add new addressing lines, reducing the complexity of the light board or light strip PCB routing, and at the same time, there is no need to occupy more IO ports of the main control circuit.

[0123] FIG14 is another flow chart of a backlight control method according to some embodiments. As shown in FIG9 above, the backlight control process shown in FIG14 can be applied to the display devices shown in FIG11 to FIG13, and may include the following steps:

[0124] S1410: Confirm a target interface for receiving data among the address interface and the data interface based on the instruction data.

[0125] In some embodiments, the instruction data includes a check bit, which includes level information. Different level information corresponds to different check bits. The check bit includes one of an address check bit and a data check bit, so that the target interface can be confirmed through the level information of the check bit.

[0126] In some embodiments, the step of determining the target interface between the address interface and the data interface based on the instruction data further includes: S10: detecting a check bit of the instruction data; S11: if the check bit is an address check bit, determining the address interface as the target interface; S12: if the check bit is a data check bit, determining the data interface as the target interface.

[0127] In some embodiments, the check bit is detected, and the level information or level width of the check bit can be detected. If the level information is a high level, the check bit is an address check bit, and the address interface is used as the target interface, or if the level width of the high level is greater than a certain value T, the check bit is an address check bit, and the address interface is used as the target interface. The value T can be obtained through empirical parameters; if the level information is a low level, the check bit is a data check bit, and the data interface is used as the target interface, or if the level width of the low level is greater than a certain value T, the check bit is a data check bit, and the data interface is used as the target interface.

[0128] In some embodiments, the target interface can also be determined by the sending timing of the instruction data, that is, the step of confirming the target interface in the address interface and the data interface based on the instruction data also includes: S20: obtaining the sending timing of the instruction data; S21: if the sending timing is less than the preset timing value, confirming that the target interface is the address interface; S22: if the sending timing is not less than the preset timing value, confirming that the target interface is the data interface.

[0129] In some embodiments, the preset timing value can be 2, that is, the sending timing of the instruction data is 1, that is, after the display device is powered on, the instruction data is sent for the first time, and the target interface corresponding to the instruction data is the address interface; if it is not the first time that the instruction data is sent after the actual device is powered on, the target interface for receiving the instruction data is the data interface.

[0130] S1420: Control the backlight driving circuit based on the instruction data.

[0131] In some embodiments, the backlight driving circuit performs different operations for different target interfaces. When the target interface is an address interface, different backlight driving circuits receive different data corresponding to the target interface of the backlight driving circuit.

[0132] In some embodiments, if the target interface is an address interface, the first driver circuit may include executing S1420: S30: receiving instruction data based on the address interface of the first driver circuit; S31: writing corresponding address information in the first driver circuit based on the instruction data, and processing the instruction data to obtain processed instruction data; S32: sending the processed instruction data to the second driver circuit connected in series with the address interface of the first driver circuit, so that the second driver circuit connected in series with the address interface of the first driver circuit writes corresponding address information based on the processed instruction data.

[0133] In some embodiments, the address interface DIS of the first driving circuit is connected to the data transmission line. The address interface of the first driving circuit receives instruction data, and then writes address information in the first driving circuit based on the instruction data, and deletes the data corresponding to the address information of the first driving circuit in the instruction data. The processed instruction information is then sent to the address interface of the adjacent second driving circuit through the interface of the first driving circuit. In this way, each backlight driving circuit receives the data sent by the adjacent backlight driving circuit and performs an address information writing operation, so that the address information exists in the backlight driving circuit.

[0134] In some embodiments, when the target interface is an address interface, the second driving circuit may include, when executing S1420:

[0135] S40: receiving processing data sent by the backlight driving circuit connected in series with the second driving circuit based on the address interface of the second driving circuit; wherein the processing data is obtained after the backlight driving circuit with the corresponding address information written therein processes the instruction data.

[0136] S41: Writing corresponding address information into the second driving circuit based on the processed data.

[0137] For the second driving circuit, the command data reaches the data interface through the data transmission line. Since the target interface is the address interface at this time, the data interface does not receive the command data, or does not perform any operation on the command data after receiving it.

[0138] Until the address interface of the second driving circuit receives the processed data sent by the adjacent backlight driving circuit, the second driving circuit performs the address information writing operation according to the processed data.

[0139] In some embodiments, the time node when the data interface of the second driving circuit receives the instruction data may be the same as or different from the time node when the address interface receives the processed data. Its data interface and address interface can both perform target interface judgment based on the received data. If the check bit of the instruction data mentioned above is the address check bit, then after receiving the instruction data, the data interface can know that the data interface is not the target interface, so it does not receive data or perform operations. The address interface receives the processed data, and the processed data still includes the check bit, so it can be known that the address interface is the target interface, or at this time the data interface is not the target interface, and the address interface must be the target interface, and data is received and operations are performed through the target interface.

[0140] In some embodiments, when the target interface is a data interface, the backlight driving circuit may include, when executing S1420:

[0141] S50: receiving instruction data based on the data interface; wherein the instruction data includes target address information, and the target address information represents the corresponding address information written into the backlight driving circuit.

[0142] S51: Perform backlight control based on the target address information.

[0143] In some embodiments, the instruction data is data instructing the backlight driving circuit to perform backlight control. When the instruction data reaches the address interface of the first driving circuit, the address interface does not accept the instruction data or does not operate. Thus, the instruction data cannot reach other backlight driving circuits or other backlight driving circuits through the address interface.

[0144] The data interface of the backlight driving circuit receives the instruction data, which includes the address information of the backlight driving circuit that needs to perform backlight control. Each backlight driving circuit in the data path can save the instruction data, but only the backlight driving circuit corresponding to the address information in the instruction data will perform backlight control. The backlight driving circuit corresponding to the address information not mentioned in the instruction data will not be operated.

[0145] FIG15 is another flowchart of a backlight control method according to some embodiments. As shown in FIG15 , the method may include the following steps:

[0146] S1501: The main control circuit issues instruction data;

[0147] S1502: Determine whether this is the first time that instruction data is issued;

[0148] S1503: If it is the first time to send, determine the target interface is the address interface;

[0149] S1504: receiving data through the address interface of the backlight driving circuit and writing address information to obtain a backlight driving circuit with all address information written therein;

[0150] S1505: If it is not the first time, determine that the target interface is a data interface;

[0151] S1506: receiving instruction data via the data interface of the backlight driving circuit in which address information is written;

[0152] S1507: Perform backlight control based on the instruction data.

[0153] In the above process, the display device of the embodiment of the present disclosure can send command data through a data transmission line, and determine the target interface in the address interface and the data interface by analyzing the command data, so that the backlight driving circuit can write address information or perform backlight control operations based on the data received by different target interfaces, thereby enabling the backlight driving circuit to have an addressing function, and the main control circuit can independently control each backlight driving circuit. The backlight control is highly flexible, and there is no need to add new addressing lines, reducing the complexity of the light board or light strip PCB routing, and the layout is simple, and backlight control can be performed at a low cost.

Claims

1. A display device, comprising: Processing module, backlight control module, backlight source module, display screen; The processing module is configured to: obtain image data of a target node of a first image frame to be displayed; The image data of the target node is image data of a partial area of ​​the first image frame; Updating the image data of the target node into the currently displayed second image frame to obtain a third image frame; performing backlight processing on the third image frame to obtain backlight data of the third image frame; displaying the third image frame, and sending backlight data of the third image frame to the backlight control module; The backlight control module is configured to control the backlight source module to perform backlight display according to the backlight data of the third image frame.

2. The display device according to claim 1, wherein the step of acquiring the image data of the target node of the first image frame to be displayed is performed by the processing module being specifically configured to: The image data segmentation parameters are acquired according to the attributes of the first image frame and / or the backlight partition division information; the image data segmentation parameters include at least: Image transmission duration and / or image area size; When the image data of the first image frame that meets the image data segmentation parameters is acquired, the image data of the target node is obtained.

3. The display device according to claim 2, wherein the step of acquiring the image data segmentation parameters based on the attributes of the first image frame and / or the backlight partition division information is performed, wherein the processing module is specifically configured to: Acquire the number of nodes of the first image frame according to the attributes of the first image frame and / or the backlight partition division information; The image data segmentation parameters are obtained according to the number of the nodes.

4. The display device according to claim 2, wherein the attributes include at least: The size of the image frame; performing the step of obtaining the image data segmentation parameter according to the attribute of the first image frame, the processing module is specifically configured to: The image data segmentation parameters are acquired according to the size of the first image frame and the mapping relationship between the size of the image frame and the segmentation parameters.

5. The display device according to claim 2, wherein the step of acquiring the image data segmentation parameters based on the attributes of the first image frame and the backlight partition division information is performed, wherein the processing module is specifically configured to: acquiring a first initial image data segmentation parameter according to an attribute of the first image frame; Acquiring a second initial image data segmentation parameter according to the backlight partition division information; The image data segmentation parameter is determined from the first initial image data segmentation parameter and the second initial image data segmentation parameter.

6. The display device according to claim 5, wherein the step of determining the image data segmentation parameter from the first initial image data segmentation parameter and the second initial image data segmentation parameter is performed by the processing module being specifically configured to: The image data segmentation parameter is selected from the first initial image data segmentation parameter and the second initial image data segmentation parameter according to a difference between the first initial image data segmentation parameter and the second initial image data segmentation parameter.

7. The display device according to claim 1, further comprising: A main control circuit, at least one data path, and at least one data transmission line; The at least one data path corresponds to the at least one data transmission line in a one-to-one manner, and the main control circuit is connected to the data path via the corresponding data transmission line; The main control circuit sends instruction data to the data path through the corresponding data transmission line; The data path includes at least one backlight driving circuit; The backlight driving circuit includes: an address interface and a data interface; the address interface is used to receive data instructing the backlight driving circuit to write address information, and the data interface is used to receive data instructing the backlight driving circuit to perform backlight control; The backlight driving circuit is configured to: confirm a target interface for receiving data in the address interface and the data interface based on the instruction data, and control the backlight driving circuit based on the instruction data.

8. The display device according to claim 7, wherein the backlight driving circuit comprises: a first driving circuit and at least one second driving circuit; An address interface of the first driving circuit is connected to the data transmission line, and the address interface between the first driving circuit and the at least one second driving circuit is connected in series.

9. The display device according to claim 8, wherein the target interface is an address interface; and the control of the backlight driving circuit based on the instruction data is performed, wherein the first driving circuit is specifically configured as follows: receiving the instruction data based on the address interface of the first driving circuit; writing corresponding address information into the first driving circuit based on the instruction data, and processing the instruction data to obtain processed instruction data; The processed instruction data is sent to a second driving circuit connected in series with the address interface of the first driving circuit, so that the second driving circuit connected in series with the address interface of the first driving circuit writes corresponding address information based on the processed instruction data.

10. The display device according to claim 8, wherein the target interface is an address interface; and the control of the backlight driving circuit based on the instruction data is performed, wherein the second driving circuit is specifically configured as follows: The address interface of the second driving circuit receives the processed data sent by the backlight driving circuit connected in series with the second driving circuit; wherein, The processed data is obtained after the backlight driving circuit, which has been written with the corresponding address information, processes the instruction data; Corresponding address information is written in the second driving circuit based on the processed data.

11. The display device according to claim 7 , wherein the target interface is a data interface, and the data interface of the backlight driving circuit is connected to the corresponding data transmission line; and the backlight driving circuit is specifically configured to: The instruction data is received based on the data interface; wherein, The instruction data includes target address information, and the target address information represents the corresponding address information written into the backlight driving circuit; Backlight control is performed based on the target address information.

12. The display device according to claim 7 , wherein the instruction data includes a check bit, and the check bit includes part or all of an address check bit and a data check bit; and the backlight driving circuit is configured to: detecting a check bit of the instruction data; If the check bit is the address check bit, the address interface is used as the target interface; If the check bit is the data check bit, the data interface is used as the target interface. 13 . The display device according to claim 12 , wherein the check bit includes level information, the level information of the address check bit indicates a high level, and the level information of the data check bit indicates a low level.

14. The display device according to claim 7, wherein the step of determining the target interface in the address interface and the data interface based on the instruction data is performed, and the backlight driving circuit is specifically configured as follows: Obtaining a sending timing of the instruction data; If the sending timing is less than the preset timing value, confirming that the target interface is the address interface; If the sending timing is not less than the preset timing value, it is confirmed that the target interface is a data interface.

15. A backlight control method, applied to the display device according to any one of claims 1 to 14, the method comprising: Acquire image data of a target node of a first image frame to be displayed; The image data of the target node is image data of a partial area of ​​the first image frame; Updating the image data of the target node into the currently displayed second image frame to obtain a third image frame; performing backlight processing on the third image frame to obtain backlight data of the third image frame; The third image frame is displayed, and backlight data of the third image frame is sent to the backlight control module, so that the backlight control module controls the backlight source module to perform backlight display according to the backlight data of the third image frame.

Images