Display device and driving method and system thereof

Abstract

The invention discloses a display device and a driving method and system thereof, the display device comprises a display panel and a backlight module, the display panel comprises a first display area and a second display area, and the backlight module comprises a first backlight area and a second backlight area; the driving method comprises the following steps: converting each frame of image data in received video data into first pixel data corresponding to a first part of image and second pixel data corresponding to a second part of image; acquiring boundary pixel data at the connection boundary of the first part image and the second part image according to the data of each frame of image, and converting the boundary pixel data into boundary dimming data; acquiring first target dimming data according to the first pixel data and the boundary dimming data to drive the first backlight area, and acquiring second target dimming data according to the second pixel data and the boundary dimming data to drive the second backlight area. According to the invention, the uniformity of backlight brightness is improved, and the overall image quality and the local dimming effect are improved.

Description

Technical Field

[0001] This application relates to the field of electronic technology, specifically to a display device and its driving method and system. Background Technology

[0002] To meet the demands of high-end gaming, film and television, and other applications, high refresh rates have always been a key trend in panel technology development. Currently, there are mature solutions that use multiple chips in parallel to increase refresh rates. For example, two independent TCON chips supporting 4K 60Hz can be used. These chips receive and process pixel data from half of the screen area (e.g., each processing 1920x2160 resolution) respectively, and then output the data collaboratively to ultimately drive the entire 4K 120Hz display panel.

[0003] However, for image quality chips with integrated local dimming capabilities, the aforementioned simple parallel "split-screen processing" solution is difficult to apply directly. The fundamental reason lies in the global and collaborative requirements of local dimming algorithms. The core task of local dimming is to calculate, in real-time, local dimming data to control the brightness of thousands of Mini-LED backlight zones based on the image content. This process involves key algorithm modules such as "backlight diffusion" (optical mixing), "spatial filtering," and "temporal filtering." These modules typically require convolution calculations on backlight data within a certain neighborhood centered on the target zone to ensure a natural backlight brightness transition and avoid halos or uneven brightness.

[0004] When attempting to divide the screen into left and right halves and have two image processing chips handle the task independently, the backlight zones located near the screen's physical center line will face the problem of missing algorithm data. If this data cannot be obtained, the backlight algorithms on both sides of the boundary will perform independent calculations based on incomplete information, leading to deviations in backlight brightness calculations near the center line. This results in noticeable uneven brightness and contrast processing on the left and right sides, creating a "seam" problem that affects overall image quality and local dimming effects.

[0005] Therefore, the technology still needs to be improved and enhanced. Summary of the Invention

[0006] This application provides a display device and its driving method and system, which can alleviate the problem of uneven backlight brightness in current display screens.

[0007] This application provides a driving method for a display device. The display device includes a display panel and a backlight module. The display panel includes a first display area and a second display area. The backlight module includes a first backlight area corresponding to the first display area and a second backlight area corresponding to the second display area. The first display area is used to display a first portion of an image frame, and the second display area is used to display a second portion of the image frame. The driving method includes: Each frame of image data in the received video data is converted into first pixel data corresponding to the first part of the image and second pixel data corresponding to the second part of the image; Obtain the boundary pixel data at the boundary connecting the first part of the image and the second part of the image based on the image data of each frame, and convert the boundary pixel data into boundary dimming data; First target dimming data is obtained based on first pixel data and boundary dimming data to drive the first backlight area, and second target dimming data is obtained based on second pixel data and boundary dimming data to drive the second backlight area.

[0008] In some embodiments of the driving method for a display device, the steps of obtaining first target dimming data based on first pixel data and boundary dimming data to drive a first backlight area, and obtaining second target dimming data based on second pixel data and boundary dimming data to drive a second backlight area include: The first pixel data is converted into first local dimming data, and the second pixel data is converted into second local dimming data; First target dimming data is obtained based on first local dimming data and boundary dimming data, and second target dimming data is obtained based on second local dimming data and boundary dimming data.

[0009] In some embodiments of the driving method for a display device, the steps of obtaining first target dimming data based on first local dimming data and boundary dimming data, and obtaining second target dimming data based on second local dimming data and boundary dimming data, include: The first local dimming data and the boundary dimming data are concatenated to obtain the first concatenated dimming data. The first concatenated dimming data is then convolved and cropped to output the first target dimming data. The second local dimming data is concatenated with the boundary dimming data to obtain the second concatenated dimming data. The second concatenated dimming data is then convolved and cropped to output the second target dimming data.

[0010] This application embodiment also provides a driving system for a display device. The display device includes a display panel and a backlight module. The display panel includes a first display area and a second display area. The backlight module includes a first backlight area corresponding to the first display area and a second backlight area corresponding to the second display area. The first display area is used to display a first portion of an image frame, and the second display area is used to display a second portion of the image frame. The driving system includes: The main control module is used to convert each frame of image data in the received video data into first pixel data corresponding to the first part of the image and second pixel data corresponding to the second part of the image, and to obtain the boundary pixel data at the connection boundary between the first part of the image and the second part of the image based on each frame of image data, so as to convert the boundary pixel data into boundary dimming data. The first image quality chip is connected to the main control module. The first image quality chip is used to obtain the first target dimming data based on the first pixel data and the boundary dimming data in order to drive the first backlight area. The second image quality chip is connected to the main control module. The second image quality chip is used to obtain the second target dimming data based on the second pixel data and the boundary dimming data in order to drive the second backlight area.

[0011] In some embodiments of the driving system of the display device, the main control module is specifically used to output boundary dimming data and first pixel data to the first image quality chip through the same transmission channel, and to output boundary dimming data and second pixel data to the second image quality chip through the same transmission channel.

[0012] In some embodiments of the driving system of the display device, the main control module is specifically used to embed boundary dimming data into first pixel data and second pixel data respectively, and output the first pixel data embedded with boundary dimming data to the first image quality chip, and output the second pixel data embedded with boundary dimming data to the second image quality chip.

[0013] In some embodiments of the driving system of the display device, the main control module is specifically used to output boundary dimming data and first pixel data to the first image quality chip through two transmission channels, and to output boundary dimming data and second pixel data to the second image quality chip through two transmission channels.

[0014] In some embodiments of the driving system of a display device, the first image quality chip is specifically used to convert the first pixel data into first local dimming data, and to obtain first target dimming data based on the first local dimming data and the boundary dimming data.

[0015] In some embodiments of the driving system of a display device, the second image quality chip is specifically used to convert the second pixel data into second local dimming data, and to obtain second target dimming data based on the second local dimming data and the boundary dimming data.

[0016] In some embodiments of the driving system of the display device, the first image quality chip is further configured to stitch together the first local dimming data and the boundary dimming data to obtain the first stitched dimming data, and then perform convolution processing on the first stitched dimming data and crop it to output the first target dimming data.

[0017] In some embodiments of the driving system of the display device, the second image quality chip is further configured to stitch the second local dimming data and the boundary dimming data together to obtain the second stitched dimming data, and to perform convolution processing on the second stitched dimming data and then crop it to output the second target dimming data.

[0018] This application embodiment also provides a display device, the display device comprising: The display panel includes a first display area and a second display area. The first display area is used to display a first part of a frame image, and the second display area is used to display a second part of the frame image. The backlight module includes a first backlight area corresponding to the first display area and a second backlight area corresponding to the second display area; The aforementioned driving system is used to control the backlight module to provide backlight to the display panel.

[0019] The display device and its driving system and method provided in this application refer to boundary dimming data when acquiring the first target dimming data and the second target dimming data. The boundary dimming data includes dimming data of symmetrical parts on both sides of the boundary. By converting the first pixel data into local dimming data, the problem of missing data at the boundary connecting the first pixel data and the second pixel data can be alleviated when performing backlight algorithm processing. Similarly, the problem of missing data at the boundary connecting the second pixel data and the first pixel data can also be alleviated. This can alleviate the problem of uneven backlight processing at the image stitching boundary, thereby improving the uniformity of backlight brightness. Attached Figure Description

[0020] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0021] Figure 1 This is a first schematic diagram of the driving architecture in a display device provided in an embodiment of this application.

[0022] Figure 2 This is a second schematic diagram of the driving architecture in a display device provided in an embodiment of this application.

[0023] Figure 3 This is a third schematic diagram of the driving architecture in the display device provided in the embodiments of this application.

[0024] Figure 4 This is a schematic diagram of the display area and backlight area in the display device provided in the embodiments of this application.

[0025] Figure 5This is a schematic flowchart of a driving method for a display device provided in an embodiment of this application.

[0026] Figure 6 This is a schematic diagram of the boundary region between the first display area and the second display area in the display device provided in the embodiments of this application.

[0027] Figure 7 This is a flowchart illustrating step 300 of the driving method for the display device provided in an embodiment of this application.

[0028] Figure 8 This is a block diagram of the driving system structure of the display device provided in the embodiments of this application.

[0029] Figure 9 This is a structural block diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] Mini-LED is a new type of LED display technology with chip sizes between 100 and 300 micrometers (approximately 0.1 to 0.3 millimeters). In the era of Mini-LED and large-screen displays, image quality has become the core competitiveness of display products. The image quality chip, as the "heart" that determines the upper limit of the final imaging effect, is a core component for investment in the research and development of smart displays.

[0033] To meet the demands of high-end gaming, film, and other applications, high refresh rates have always been a crucial trend in panel technology development. However, increasing the refresh rate directly leads to a significant increase in the amount of display data. For example, the display bandwidth required for a 4K 240Hz signal is approximately twice that of a 4K 120Hz signal. Here, 4K refers to resolution, which can be understood as the number of pixels per frame; 4K resolution corresponds to approximately 3840×2160 pixels. 240Hz and 120Hz can be understood as refresh rates, which can be understood as the number of frames displayed per second. Display bandwidth can be understood as the amount of data that the video interface needs to transmit per second. Display bandwidth is related to resolution and refresh rate. Given a fixed resolution and other relevant factors, a 4K 240Hz signal requires approximately twice the display bandwidth of a 4K 120Hz signal. This increase in display bandwidth not only necessitates upgrades to the physical layer performance of the interface but also makes the design of the internal logic circuitry of the chip more complex, ultimately leading to a significant increase in hardware costs.

[0034] Currently, refresh rates are often increased by connecting multiple chips in parallel. For example, two independent TCON chips (timing control chips) supporting 4K 60Hz can be used, such as... Figure 1 The two TCON chips 1 in the display receive and process pixel data from half of the screen area (e.g., each processing 1920x2160 resolution) respectively, and then output the data collaboratively to ultimately drive the entire 4K 120Hz display panel. This solution effectively decomposes the bandwidth requirements of a single chip, reducing the single-path transmission rate and the chip design threshold.

[0035] However, for image quality chips with integrated local dimming capabilities, the aforementioned simple parallel "split-screen processing" solution is difficult to apply directly. The fundamental reason lies in the global and collaborative requirements of local dimming algorithms. The core task of local dimming is to calculate, in real-time, local dimming data to control the brightness of thousands of Mini-LED backlight zones based on the image content. This process involves key algorithm modules such as "backlight diffusion" (optical mixing), "spatial filtering," and "temporal filtering." These modules typically require convolution calculations on backlight data within a certain neighborhood centered on the target zone to ensure a natural backlight brightness transition and avoid halos or uneven brightness.

[0036] Please see Figure 2 and Figure 3When attempting to divide the screen into left and right halves, each processed independently by two image processing chips, the backlight partitions located near the screen's physical center line will face the problem of missing algorithm data. For example, in a 384x216 backlight partition design, each backlight partition within a strip-shaped region S0 (e.g., 16 partitions wide and 216 partitions high) located at the center of the left and right chip processing boundaries requires partial neighborhood data (such as the 8 columns of partition data to the left of the center line processed by the right chip, i.e., region S1, or the 8 columns of partition data to the right of the center line processed by the left chip, i.e., region S2) located inside the other chip. If this data cannot be obtained, the backlight algorithms on both sides of the boundary will perform independent calculations based on incomplete information. That is, the backlight data in the center cannot interactively complete the full convolution calculation, which will lead to uneven backlight processing on the left and right sides, thus affecting the light control effect.

[0037] The display device and its driving method and system provided in the embodiments of this application will be described in detail below.

[0038] Please see Figure 4 In the driving method of the display device provided in this application embodiment, the display device includes a display panel 10 and a backlight module 20. The display panel 10 includes a first display area and a second display area. The backlight module 20 includes a first backlight area corresponding to the first display area and a second backlight area corresponding to the second display area. The first backlight area provides backlight for the first display area, and the second backlight area provides backlight for the second display area. The first display area is used to display a first portion of an image frame, and the second display area is used to display a second portion of the image frame. It should be noted that in actual display products, the display panel 10 and the backlight module 20 are stacked. In this embodiment, the display panel 10 and the backlight module 20 are shown separately to illustrate the display area and the backlight area.

[0039] As one embodiment, the first image and the second image can constitute a complete image frame. In this embodiment, the first image and the second image are divided into left and right parts, corresponding to the display panel 10 being divided into left and right regions, and the backlight module 20 being divided into left and right regions. It should be noted that in other embodiments, other division methods can also be selected, such as dividing the first image and the second image according to the distribution of the upper left and lower right. In this case, the division of the display area of ​​the display panel 10 and the division of the backlight area of ​​the backlight module 20 corresponds to the division of the image. This application does not limit the division form. In addition, in this embodiment, a frame of image is divided into two parts. Alternatively, a frame of image can be divided into multiple parts, with the corresponding display area divided into multiple display areas and the backlight module 20 divided into multiple corresponding backlight areas. The multiple display areas display the corresponding parts of the image in a frame to achieve the display of a complete image frame. In this embodiment, the number of image divisions is not limited.

[0040] The following embodiments illustrate the division of a frame image into two partial images, the division of the display panel 10 into two display areas, and the division of the backlight module 20 into two backlight zones.

[0041] The driving method of the display device in this embodiment converts each frame of image data in the received video data into first pixel data corresponding to a first part of the image and second pixel data corresponding to a second part of the image. It obtains boundary pixel data at the boundary connecting the first part of the image and the second part of the image based on each frame of image data and converts the boundary pixel data into boundary dimming data. It obtains first target dimming data based on the first pixel data and the boundary dimming data to drive the first backlight area, and obtains second target dimming data based on the second pixel data and the boundary dimming data to drive the second backlight area.

[0042] Please see Figure 5 In some embodiments, the driving method includes steps S100 to S300, the specific steps of which are as follows: S100: Convert each frame of image data in the received video data into first pixel data corresponding to the first part of the image and second pixel data corresponding to the second part of the image.

[0043] When displaying the image corresponding to each frame of video data, the acquired video data is first decoded and then subjected to some basic processing, such as basic scaling and noise reduction. In this embodiment, to adapt to the two display areas of the display panel, each frame of image data is divided into two parts after basic processing to obtain first pixel data and second pixel data. The first pixel data corresponds to the display data of the first part of the image, and the second pixel data corresponds to the display data of the second part of the image.

[0044] S200: Obtain the boundary pixel data at the connection boundary between the first part of the image and the second part of the image based on the image data of each frame, and convert the boundary pixel data into boundary dimming data.

[0045] like Figure 6 As shown, the boundary between the first and second image portions is located at the position of the dashed line in the figure (if the image is divided into two equal parts, the dashed line is close to the physical center line of the display panel). The boundary pixel data corresponding to the boundary connecting the first and second image portions is obtained, i.e., the pixel data symmetrically distributed on both sides of the dashed line is obtained. A portion of the symmetrical pixel data belongs to the A1 region, and the other portion belongs to the corresponding A1 region. In other words, the boundary pixel data includes two parts: one part is the pixel data corresponding to the A10 region, and the other part is the pixel data corresponding to the A20 region. Subsequently, based on the local dimming function, the boundary pixel data is converted into boundary dimming data to facilitate the subsequent acquisition of the first target dimming data required for the first display area and the second target dimming data required for the second display area.

[0046] S300: Obtain first target dimming data based on first pixel data and boundary dimming data to drive the first backlight area; obtain second target dimming data based on second pixel data and boundary dimming data to drive the second backlight area.

[0047] First target dimming data is obtained based on first pixel data and boundary dimming data, and then backlighting is provided to the first display area based on second target pixel data. Simultaneously, second target dimming data is obtained based on second pixel data and boundary dimming data, and then a second backlight area is driven to provide backlighting to the second display area based on the second target dimming data. In this application, boundary dimming data is referenced when obtaining both the first and second target dimming data. The boundary dimming data includes symmetrical dimming data on both sides of the boundary. Therefore, by converting the first pixel data into local dimming data, the backlighting algorithm on both sides of the boundary will perform calculations based on complete information, alleviating the data loss problem in the first pixel data at the boundary connecting to the second pixel data; similarly, it also alleviates the data loss problem in the second pixel data at the boundary connecting to the first pixel data. This can alleviate the problem of uneven backlight processing at image stitching boundaries, thereby improving the uniformity of overall backlight brightness.

[0048] Please see Figure 7 In some embodiments, step 300 includes: 310. Convert the first pixel data into first local dimming data, and convert the second pixel data into second local dimming data.

[0049] After acquiring the first pixel data and the second pixel data, the first pixel data and the second pixel data are combined with the backlight algorithm to convert them into corresponding first local dimming data and second local dimming data.

[0050] 320. Obtain first target dimming data based on first local dimming data and boundary dimming data, and obtain second target dimming data based on second local dimming data and boundary dimming data.

[0051] Because there are discrepancies in the algorithm data at the boundaries when converting the first pixel data into the first local dimming data, the first local dimming data is processed with reference to the boundary dimming data to obtain the first target dimming data. Similarly, after converting the second pixel data into the second local dimming data, it is processed in conjunction with the boundary dimming data to obtain the second target dimming data.

[0052] As one embodiment, step 320 includes concatenating the first local dimming data with the boundary dimming data to obtain the first concatenated dimming data, performing convolution processing on the first concatenated dimming data and cropping it to output the first target dimming data; concatenating the second local dimming data with the boundary dimming data to obtain the second concatenated dimming data, performing convolution processing on the second concatenated dimming data and cropping it to output the second target dimming data.

[0053] The first local dimming data is concatenated with the boundary dimming data to obtain the first concatenated dimming data. This is equivalent to adding the dimming data corresponding to region A20 to the first local dimming data (corresponding to display area A1). Then, the first concatenated dimming data is convolved to compensate for the dimming data, making the overall backlight brightness of region A1 more uniform. Next, the dimming data corresponding to display area A20 is cropped to obtain the first target dimming data for region A1. Similarly, the second local dimming data is concatenated with the boundary dimming data to obtain the second concatenated dimming data. This is equivalent to adding the dimming data corresponding to region A10 to the second local dimming data (corresponding to display area A2). Then, the second concatenated dimming data is convolved to compensate for the dimming data, making the overall backlight brightness of region A2 more uniform. Next, the dimming data corresponding to display area A10 is cropped to obtain the second target dimming data for region A2.

[0054] The first backlight area is driven according to the first target dimming data, and the first backlight area provides backlight for the first display area; the second backlight area is driven according to the second target dimming data, and the second backlight area provides backlight for the second display area. Both the first target dimming data and the second target dimming data reference the boundary dimming data. When displaying the first part of the image and the second part of the image, this can alleviate the problem of uneven backlight brightness caused by the loss of algorithm data at the boundary, which is beneficial to improving the overall image quality and local dimming effect.

[0055] Please see Figure 8 This application embodiment also provides a driving system for a display device, the driving system including a main control module 31, a first image quality chip 32 and a second image quality chip 33, the main control module 31 being connected to the first image quality chip 32 and the second image quality chip 33 respectively.

[0056] The main control module is used to convert each frame of image data in the received video data into first pixel data corresponding to the first part of the image and second pixel data corresponding to the second part of the image, and to obtain the boundary pixel data at the connection boundary between the first part of the image and the second part of the image based on each frame of image data, so as to convert the boundary pixel data into boundary dimming data.

[0057] The main control module 31 includes a SoC (System on Chip) chip, which has built-in local dimming functionality, generally supporting a limited number of local dimming zones. In this embodiment, the main control module 31 receives video data, decodes and processes each frame of image data to obtain corresponding pixel data, and then divides the pixel data according to the number of target display areas (e.g., two display areas) to obtain first pixel data and second pixel data. Simultaneously, it acquires the boundary pixel data at the junction of the first and second image portions. Because the SoC chip has local dimming functionality, it converts the boundary pixel data into boundary dimming data. The SoC chip then sends the first pixel data and boundary dimming data to the first image quality chip 32, and the second pixel data and boundary dimming data to the second image quality chip 33.

[0058] The first image quality chip 32 is used to obtain first target dimming data based on first pixel data and boundary dimming data to drive the first backlight area; the second image quality chip 33 is used to obtain second target dimming data based on second pixel data and boundary dimming data to drive the second backlight area. Thus, the first image quality chip 32 references boundary dimming data when obtaining the first target dimming data. Since the boundary dimming data includes symmetrical dimming data on both sides of the boundary, converting the first pixel data into local dimming data can alleviate the problem of missing data at the boundary connecting the first pixel data to the second pixel data during backlight algorithm processing. Similarly, the second image quality chip 33 also references boundary dimming data when obtaining the second target dimming data. Since the boundary dimming data includes symmetrical dimming data on both sides of the boundary, converting the second pixel data into local dimming data can alleviate the problem of missing data at the boundary connecting the second pixel data to the first pixel data during backlight algorithm processing. Therefore, when the two image quality chips control the display of the overall image, the problem of missing algorithm data at the center line of the overall image (such as the dotted line mentioned above), which is the connection boundary between the two partial images, is alleviated, thereby helping to improve the uniformity of the overall backlight brightness.

[0059] In some embodiments, the main control module 31 is specifically used to output boundary dimming data and first pixel data to the first image quality chip 32 through the same transmission channel, and to output boundary dimming data and second pixel data to the second image quality chip 33 through the same transmission channel. Data between the main control module 31 and the image quality chip can be transmitted based on the V-by-One HS protocol, and the corresponding SoC chip and image quality chip have interfaces matching this protocol. When the SoC and the first image quality chip 32 transmit data, the boundary dimming data and the first pixel data can share a single transmission channel; that is, the SoC can send the first pixel data and boundary dimming data using one transmitting interface, and the first image quality chip 32 can receive the first pixel data and boundary dimming data using one receiving interface. When the SoC and the second image quality chip 33 transmit data, the boundary dimming data and the second pixel data can share a single transmission channel; the SoC can send the second pixel data and boundary dimming data using another transmitting interface, and the first image quality chip 32 can receive the first pixel data and boundary dimming data using another receiving interface.

[0060] As one embodiment, the main control module 31 is specifically used to embed the boundary dimming data into the first pixel data and the second pixel data respectively, and output the first pixel data with the embedded boundary dimming data to the first image quality chip 32, and output the second pixel data with the embedded boundary dimming data to the second image quality chip 33.

[0061] Specifically, when transmitting a line or frame of pixel data, the V-by-One interface has a horizontal blanking period (H-Blank) and a vertical blanking period (V-Blank). During these periods, no valid pixel data is transmitted; therefore, the H-Blank and V-Blank periods are considered blank periods relative to the valid pixel data transmission period. When the first pixel data is formed into a V-by-One data packet for transmission, corresponding horizontal and vertical blanking regions exist. This allows boundary dimming data to be packaged and filled into the horizontal and / or vertical blanking regions, and sent along with the pixel data to the corresponding image processing chip, facilitating the synchronous transmission of boundary dimming data and pixel data. The blanking period and the effective pixel data transmission period are different time periods. Embedding the boundary dimming data into the pixel data and sending it to the image quality chip is equivalent to time-division transmission of boundary dimming data and pixel data, which helps the image quality chip to separate the boundary dimming data and pixel data in the receiving timing.

[0062] A complete edge dimming data packet typically includes a header (identifying edge dimming data), a partition information address (indicating which backlight partition is being controlled), brightness data values, and a checksum. Since edge dimming data corresponds to multiple backlight partitions and the data volume is relatively large, the edge dimming data corresponding to each frame of image data can be split into multiple line blanking areas for transmission. Each image quality chip receives the data packet, identifies it, and then reassembles it.

[0063] Of course, boundary dimming data can also be inserted into CTL data for transmission. CTL data is an important component of the V-by-One HS protocol used to transmit control signals and status information; it is transmitted along with video data via a high-speed serial link to ensure communication synchronization and reliability between the sender and receiver. It should be noted that this application does not limit the specific transmission method for boundary dimming data.

[0064] In the aforementioned data transmission process, neither the SoC chip side nor the image quality chip side needs to add an additional interface for transmitting boundary dimming data. At the same time, the first image quality chip 32 and the second image quality chip 33 do not need to exchange boundary dimming data through data transmission. Instead, they can directly obtain the data through the main control module 31. This reduces the design of corresponding circuits (such as switching interface circuits) on the image quality chip side, thereby improving image quality and dimming effect while saving hardware costs.

[0065] In other embodiments, the main control module 31 is specifically used to output boundary dimming data and first pixel data to the first image quality chip 32 through two transmission channels, and to output boundary dimming data and second pixel data to the second image quality chip 33 through two transmission channels. Unlike time-division multiplexing, which shares the same channel and transmits different types of data at different times, independent channel transmission allocates a dedicated physical channel for transmitting boundary dimming data. The V-by-One protocol supports multi-channel transmission (such as 2 channels, 4 channels, etc.). When the main control module 31 transmits data with the first image quality chip 32, it can select one independent channel to transmit boundary dimming data, while other channels transmit the first pixel data; similarly, when the main control module 31 transmits data with the second image quality chip 33, it can select one independent channel to transmit boundary dimming data, while other channels transmit the second pixel data. In this way, pixel data and boundary dimming data are transmitted simultaneously on different physical channels without interference, which also reduces the latency problem between boundary dimming data and pixel data.

[0066] In some embodiments, the first image quality chip 32 is specifically used to convert the first pixel data into first local dimming data, and obtain first target dimming data based on the first local dimming data and boundary dimming data; the second image quality chip 33 is specifically used to convert the second pixel data into second local dimming data, and obtain second target dimming data based on the first local dimming data and boundary dimming data.

[0067] In this embodiment, both the first image quality chip 32 and the second image quality chip 33 integrate local dimming and Tcon chip functions. Therefore, the first image quality chip 32 can convert the corresponding first pixel data into first local dimming data, and the second image quality chip 33 can convert the corresponding second pixel data into second local dimming data.

[0068] In one embodiment, the first image quality chip 32 is further configured to concatenate the first local dimming data with the boundary dimming data to obtain first concatenated dimming data, and then perform convolution processing on the first concatenated dimming data and crop it to output the first target dimming data. The first image quality chip 32 concatenates the first local dimming data with the boundary dimming data to obtain the first concatenated dimming data, which is equivalent to adding the dimming data corresponding to region A20 to the first local dimming data (corresponding to display area A1). Then, the first concatenated dimming data is convolved to achieve dimming data compensation, making the overall backlight brightness corresponding to region A1 more uniform. Afterwards, the dimming data corresponding to display area A20 is cropped to obtain the first target dimming data corresponding to region A1.

[0069] The second image quality chip 33 is further used to concatenate the second local dimming data with the boundary dimming data to obtain the second concatenated dimming data, and then perform convolution processing and cropping on the second concatenated dimming data to output the second target dimming data. Similarly, the second image quality chip 33 concatenates the second local dimming data with the boundary dimming data to obtain the second concatenated dimming data, which is equivalent to adding the dimming data corresponding to region A10 to the second local dimming data (corresponding to display area A2). Then, the second concatenated dimming data is convolved to achieve dimming data compensation, making the overall backlight brightness corresponding to region A2 more uniform. Finally, the dimming data corresponding to display area A10 is cropped to obtain the second target dimming data corresponding to region A2.

[0070] The first image quality chip 32 drives the first backlight area according to the first target dimming data, and the first backlight area provides backlight for the first display area. Simultaneously, the second image quality chip 33 drives the second backlight area according to the second target dimming data, and the second backlight area provides backlight for the second display area. Both the first and second image quality chips 32 and 33 reference boundary dimming data when acquiring the first and second target dimming data. This mitigates the problem of uneven backlight brightness caused by data loss at the boundaries when displaying the first and second parts of the image, thus improving overall image quality and local dimming effects. During the above driving process, the first and second image quality chips 32 and 33 do not need to exchange data, and therefore do not require additional interface circuits for data exchange, thereby saving hardware costs and reducing the design complexity of the driving system.

[0071] Please see Figure 9 This application also provides a display device, which includes a display panel 10, a backlight module 20 and the aforementioned driving system 30. The driving system 30 is connected to the display panel 10 and the backlight module 20 respectively, and controls the backlight module 20 to provide backlight to the display panel 10.

[0072] Specifically, the display panel 10 includes a first display area and a second display area. The first display area displays a first portion of an image frame, and the second display area displays a second portion of the image frame. The backlight module 20 includes a first backlight area corresponding to the first display area and a second backlight area corresponding to the second display area. The first backlight area provides backlight for the first display area, and the second backlight area provides backlight for the second display area. The driving system 30 provides corresponding driving chips for the first and second backlight areas. Since the display panel 10, backlight module 20, and driving system 30, as well as their operation, have been described in detail above, they will not be repeated here.

[0073] In the driving system 30 of the display device, the two image quality chips doubling the refresh rate and backlight zones can be achieved without direct data interaction. This saves hardware design costs, simplifies system design complexity, and allows for adaptation to display panels 10 with higher resolutions and refresh rates. During the doubling of backlight zones, boundary dimming data is acquired to participate in the generation of target dimming data in each image quality chip. This alleviates the problem of missing backlight algorithm data for pixels near the image center line during backlight processing, improves backlight brightness uniformity, and helps ensure overall image quality and local dimming effects.

[0074] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0075] The driving method of the display device provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A driving method for a display device, characterized in that, The display device includes a display panel and a backlight module. The display panel includes a first display area and a second display area. The backlight module includes a first backlight area corresponding to the first display area and a second backlight area corresponding to the second display area. The first display area is used to display a first portion of an image frame, and the second display area is used to display a second portion of the image frame. The driving method includes: Each frame of image data in the received video data is converted into first pixel data corresponding to the first part of the image and second pixel data corresponding to the second part of the image; Obtain the boundary pixel data at the connection boundary between the first part of the image and the second part of the image based on the image data of each frame, and convert the boundary pixel data into boundary dimming data; First target dimming data is obtained based on the first pixel data and the boundary dimming data to drive the first backlight area, and second target dimming data is obtained based on the second pixel data and the boundary dimming data to drive the second backlight area.

2. The driving method for the display device according to claim 1, characterized in that, The steps of obtaining first target dimming data based on the first pixel data and the boundary dimming data to drive the first backlight area, and obtaining second target dimming data based on the second pixel data and the boundary dimming data to drive the second backlight area include: The first pixel data is converted into first local dimming data, and the second pixel data is converted into second local dimming data; The first target dimming data is obtained based on the first local dimming data and the boundary dimming data, and the second target dimming data is obtained based on the second local dimming data and the boundary dimming data.

3. The driving method for the display device according to claim 2, characterized in that, The steps of obtaining first target dimming data based on the first local dimming data and the boundary dimming data, and obtaining second target dimming data based on the second local dimming data and the boundary dimming data, include: The first local dimming data and the boundary dimming data are spliced ​​together to obtain the first spliced ​​dimming data. The first spliced ​​dimming data is then convolved and cropped to output the first target dimming data. The second local dimming data is spliced ​​with the boundary dimming data to obtain the second spliced ​​dimming data. The second spliced ​​dimming data is then convolved and cropped to output the second target dimming data.

4. A driving system for a display device, characterized in that, The display device includes a display panel and a backlight module. The display panel includes a first display area and a second display area. The backlight module includes a first backlight area corresponding to the first display area and a second backlight area corresponding to the second display area. The first display area is used to display a first part of an image frame, and the second display area is used to display a second part of the image frame. The drive system includes: The main control module is used to convert each frame of image data in the received video data into first pixel data corresponding to the first part of the image and second pixel data corresponding to the second part of the image, and to obtain the boundary pixel data at the connection boundary between the first part of the image and the second part of the image based on each frame of image data, so as to convert the boundary pixel data into boundary dimming data; A first image quality chip is connected to the main control module. The first image quality chip is used to obtain first target dimming data based on the first pixel data and the boundary dimming data in order to drive the first backlight area. The second image quality chip is connected to the main control module. The second image quality chip is used to obtain second target dimming data based on the second pixel data and the boundary dimming data, so as to drive the second backlight area.

5. The driving system for the display device according to claim 4, characterized in that, The main control module is specifically used to output the boundary dimming data and the first pixel data to the first image quality chip through the same transmission channel, and to output the boundary dimming data and the second pixel data to the second image quality chip through the same transmission channel.

6. The driving system for the display device according to claim 5, characterized in that, The main control module is specifically used to embed the boundary dimming data into the first pixel data and the second pixel data respectively, and output the first pixel data embedded with the boundary dimming data to the first image quality chip, and output the second pixel data embedded with the boundary dimming data to the second image quality chip.

7. The driving system for the display device according to claim 4, characterized in that, The main control module is specifically used to output the boundary dimming data and the first pixel data to the first image quality chip through two transmission channels, and to output the boundary dimming data and the second pixel data to the second image quality chip through two transmission channels.

8. The driving system for the display device according to claim 4, characterized in that, The first image quality chip is specifically used to convert the first pixel data into first local dimming data, and to obtain the first target dimming data based on the first local dimming data and the boundary dimming data.

9. The driving system for the display device according to claim 4, characterized in that, The second image quality chip is specifically used to convert the second pixel data into second local dimming data, and to obtain second target dimming data based on the second local dimming data and the boundary dimming data.

10. The driving system for the display device according to claim 8, characterized in that, The first image quality chip is further configured to stitch the first local dimming data with the boundary dimming data to obtain first stitched dimming data, and to perform convolution processing on the first stitched dimming data and then crop it to output the first target dimming data.

11. The driving system for the display device according to claim 9, characterized in that, The second image quality chip is further configured to stitch the second local dimming data with the boundary dimming data to obtain the second stitched dimming data, and to perform convolution processing on the second stitched dimming data and then crop it to output the second target dimming data.

12. A display device, characterized in that, The display device includes: The display panel includes a first display area and a second display area. The first display area is used to display a first portion of an image frame, and the second display area is used to display a second portion of the image frame. A backlight module, the backlight module including a first backlight area corresponding to the first display area and a second backlight area corresponding to the second display area; The driving system according to any one of claims 4-11, the driving system being used to control the backlight module to provide backlight to the display panel.

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