Partition driving method, device and display system of display system

Abstract

This application relates to the field of display technology, and provides a partition driving method, apparatus, and display system for a display system. The method includes: determining pixel information corresponding to each backlight partition based on image frames mapped to multiple backlight partitions; determining a target brightness value for each backlight partition based on the pixel information corresponding to each backlight partition; acquiring a row scanning timing signal of the display panel, the row scanning timing signal being used to determine the current scan row position; determining a sliding line window based on the current scan row position; determining an enabled partition set based on the illumination coverage relationship between each backlight partition and the sliding line window's covered row area; and outputting a partition driving signal corresponding to the backlight partition in the enabled partition set according to the target brightness value of any backlight partition in the enabled partition set, the partition driving signal being used to cause the backlight partition to output a backlight brightness matching the target brightness value. The above solution can improve color performance and dynamic clarity, and enhance the stability of the displayed image.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to a partition driving method, apparatus and display system for a display system. Background Technology

[0002] As consumers' demands for visual experience continue to rise, high dynamic range (HDR) display has become a crucial technological direction for high-end LCD monitors. Employing Mini-LED (Mini Light-Emitting Diode) backlighting with localized dimming in separate zones—dividing the backlight into hundreds or even thousands of independently controllable zones and dynamically adjusting the brightness of each zone based on the image content—is a common approach to achieving high contrast, high brightness, and HDR (High Dynamic Range) image quality. However, as image quality targets continue to improve, existing localized dimming solutions are gradually revealing limitations: on the one hand, the backlight zones' ability to control color is relatively insufficient, making it difficult to meet higher levels of color performance requirements; on the other hand, there are timing matching issues between the backlight driving process and the LCD panel refresh mechanism, which can easily lead to limitations in image stability and clarity in dynamic display scenarios, thus restricting further improvements in color performance and dynamic clarity. Summary of the Invention

[0003] In view of this, embodiments of this application provide a partition driving method, apparatus and display system for a display system, which can improve color performance and dynamic clarity, and enhance the stability of the displayed image.

[0004] The first aspect of this application provides a partition driving method for a display system. The display system includes a display panel and a partitioned backlight unit having multiple backlight zones, and the method includes: Based on image frames mapped to multiple backlight partitions, determine the pixel information corresponding to each backlight partition; The target brightness value of each backlight zone is determined based on the pixel information corresponding to each backlight zone; The row scan timing signal of the display panel is obtained, and the row scan timing signal is used to determine the position of the current scan row; The sliding line window is determined based on the current scan line position; Based on the illumination coverage relationship between each of the backlight zones and the sliding window coverage area, an enable zone set is determined, the enable zone set including at least one of the backlight zones that needs to be lit at present; Based on the target brightness value of any of the backlight partitions in the set of enabled partitions, output the partition drive signal corresponding to the backlight partition in the set of enabled partitions. The partition drive signal is used to make the backlight partition output a backlight brightness that matches the target brightness value.

[0005] The partition driving method of the display system in this embodiment first determines the pixel information corresponding to each backlight partition based on the image frames mapped to multiple backlight partitions, so that the driving calculation of the backlight partition can establish a correspondence with the screen content, thereby providing a data basis for partition-level brightness control. Second, the target brightness value of each backlight partition is determined according to the pixel information corresponding to each backlight partition, so that the backlight output can match the local brightness requirements of the screen according to the partition, thereby improving the local contrast and brightness level performance. Further, the row scanning timing signal of the display panel is obtained to determine the current scanning row position, and the sliding line window is determined according to the current scanning row position, so that the backlight partition lighting decision is established with the liquid crystal line-by-line refresh process, reducing the local refresh mismatch caused by global backlight update. On this basis, the set of enabled partitions is determined based on the illumination coverage relationship between the backlight partition and the sliding line window covering the row area. Finally, the corresponding partition driving signal is output according to the target brightness value of each backlight partition in the set of enabled partitions, so that the enabled backlight partition outputs a backlight brightness that matches the target brightness value, realizing the on-demand output of partition driving along the row, thereby improving the dynamic screen stability while ensuring high brightness and high contrast display effects.

[0006] In one possible implementation, each backlight partition of the partitioned backlight unit includes at least three color light channels, each of which is driven independently; determining the pixel information corresponding to each backlight partition based on image frames mapped to multiple backlight partitions includes: The image frame is divided into multiple logical regions corresponding to the number of backlight partitions according to the partition grid. For each of the backlight partitions, determine the set of pixels within the corresponding logical region; Statistical features of the at least three color light channels are extracted from the pixel set, and the statistical features are determined as the pixel information corresponding to the backlight partition.

[0007] In this embodiment, by independently driving at least three color light channels within a partition and extracting statistical features of each channel according to the partition grid, the correspondence between pixel content and partition color light control becomes more accurate, thereby improving the local color adjustment capability and the targeting of partition driving.

[0008] In one possible implementation, the statistical features include at least the distribution statistical features of pixel brightness values; determining the target brightness value of each backlight zone based on the pixel information corresponding to each backlight zone includes: For any color light channel of each backlight zone, a first brightness value of the color light channel is determined based on the distribution statistical characteristics; The first brightness value is subjected to a non-linear mapping transformation to obtain the initial brightness value of each of the backlight zones; The initial brightness value is compensated to obtain the target brightness value for each of the backlight zones.

[0009] In this embodiment, the first brightness value of each color light channel is determined based on the pixel brightness distribution and the initial brightness value is obtained through nonlinear mapping. The target brightness value is then obtained by compensating the initial brightness value. This allows the target brightness of the partition to retain the high brightness characteristics of the image while adapting to the nonlinearity of the display link. Furthermore, by compensating for the brightness deviation caused by factors such as optical crosstalk, the accuracy of partition brightness control and the consistency of the image are improved.

[0010] In one possible implementation, the step of compensating the initial brightness value based on optical crosstalk estimation to obtain the target brightness value for each of the backlight zones includes: Obtain the set of adjacent backlight zones for each of the aforementioned backlight zones; For a target backlight partition, based on the initial brightness value of each backlight partition in the set of adjacent backlight partitions, the crosstalk value of each of the adjacent backlight partitions to the target backlight partition is determined according to a preset crosstalk weighting coefficient and a preset compensation intensity coefficient. The target backlight partition is any one of the backlight partitions. The target backlight partition is compensated based on all crosstalk values ​​of the target backlight partition, and the compensated brightness value is subjected to the inverse transformation of the nonlinear mapping transformation to obtain the target brightness value of the color light channel corresponding to the target backlight partition.

[0011] In this embodiment, by using adjacent partition sets and combining crosstalk weights and compensation intensity to perform crosstalk compensation on the initial brightness value and then inversely transforming it to obtain the target brightness value, the influence of inter-partition optical crosstalk can be offset during the calculation stage, thereby reducing halo and boundary dirtiness and improving local contrast and color consistency.

[0012] In one possible implementation, determining the crosstalk weighting coefficient includes: The interval distance parameter between backlight zones is determined based on the geometric distance between them. Based on preset optical diffusion characteristic parameters, the crosstalk weighting coefficient is determined according to the interval distance parameter, and the sum of the crosstalk weighting coefficients of each adjacent backlight partition to the target backlight partition is less than a preset upper limit.

[0013] In this embodiment, by associating the crosstalk weight coefficient with the partition geometric distance and optical diffusion characteristics and imposing a total weight upper limit constraint, the crosstalk prediction can be made physically reasonable and the risk of overcompensation can be suppressed, thereby improving the compensation stability and image consistency.

[0014] In one possible implementation, determining the sliding line window based on the current scan line position includes: Determine the window height parameter H; Based on the current scan line position and the window height parameter H, determine the leading edge position and trailing edge position of the sliding line window, so that the sliding line window covers a continuous H-line display area; The sliding line window moves along the scanning direction as the position of the current scan line changes.

[0015] In this implementation, by determining the sliding line window that moves with the current scan line position and the window height parameter, a clear spatial and temporal correspondence is established between the backlight control and the panel's line-by-line refresh, thereby improving the drive matching performance in dynamic scenes.

[0016] In one possible implementation, determining the window height parameter H includes: The lower limit of the window height parameter H is determined based on the liquid crystal pixel response time, the backlight partition rise time, and the single-line scan time, and the window height parameter H is configured to a value not less than the lower limit.

[0017] In this embodiment, by associating the lower limit of the window height parameter with the liquid crystal response, backlight rise, and single-line scan time, it can be ensured that the window coverage meets the timing span required for system response, thereby avoiding brightness instability and flickering caused by an excessively narrow window.

[0018] In one possible implementation, determining the window height parameter H further includes: The input image frame is subjected to image analysis preprocessing to obtain vertical high-frequency feature markers; When the scan line range corresponding to the sliding line window matches the display line range corresponding to the vertical high-frequency feature mark, the window height parameter H is reduced to a value not less than the lower limit value. When the sliding line window leaves the display row range, the window height parameter H is increased to a preset value.

[0019] In this embodiment, by dynamically reducing the window height in the vertical high-frequency feature region and then increasing it again after leaving, the backlight tracking accuracy in the edge-sensitive region can be improved, the impact of response lag on the vertical edge can be reduced, and thus the dynamic clarity can be improved.

[0020] In one possible implementation, determining the set of enabled partitions based on the illumination coverage relationship between each of the backlight partitions and the sliding line window coverage area includes: Based on the geometric mapping relationship between each backlight partition and the display area of ​​the display panel, the illumination coverage contribution parameters of each backlight partition to the display area covered by the current sliding line window are determined. The backlight zones whose illumination coverage contribution parameters meet the preset threshold conditions are determined as the set of enabled zones; The enabled partition set is updated based on the current scan line position.

[0021] In this implementation, by calculating the contribution of the partition to the illumination coverage of the current window display area based on geometric mapping and forming an enable set by filtering with a threshold, only the partitions that make a significant contribution to the current display area can be enabled, thereby reducing crosstalk and power consumption caused by irrelevant lighting and improving driving efficiency.

[0022] In one possible implementation, the step of outputting the partition drive signal corresponding to the backlight partition in the enable partition set based on the target brightness value of any of the backlight partitions in the enable partition set includes: Determine the safe timing window for backlight output; For each of the backlight channels in the current enabled partition set, the duty cycle parameter of pulse width modulation is determined based on the target brightness value. The corresponding partition drive signal is generated based on the duty cycle parameter and the pulse width modulation carrier frequency; Within the safety timing window, the partition drive signal is output to the color light channel of the corresponding backlight partition.

[0023] In this embodiment, by converting the target brightness value into a pulse width modulation duty cycle and generating a partition drive signal output within a safe timing window, the unstable pixel writing phase can be avoided while meeting the brightness control accuracy, thereby reducing flicker and dynamic artifacts.

[0024] In one possible implementation, the step of outputting the partition drive signal corresponding to the backlight partition in the enable partition set based on the target brightness value of any of the backlight partitions in the enable partition set further includes: Receive an enable control signal, the enable control signal being used to control the backlight partition in the enable partition set to enter the enable state; For the backlight partition in the set of enabled partitions, read the target brightness value corresponding to each color light channel of the backlight partition from the preset cache; The read target brightness value is converted into the corresponding duty cycle parameter and loaded into the pulse width modulation signal generation unit; Within the safe timing window, the output objects of pulse width modulation are switched between different backlight zones according to a preset scheduling order, so that the pulse width modulation signal generation unit outputs zone drive signals to multiple backlight zones sequentially within the same scan cycle.

[0025] In this implementation, by enabling signal indication, buffer reading, and time-division multiplexing switching of pulse width modulation output objects, multiple partitions can be driven sequentially with less pulse width modulation generation resources, thereby reducing hardware resource consumption and improving the scalability of multi-partition driving.

[0026] In one possible implementation, the step of outputting the partition drive signal corresponding to the backlight partition in the enable partition set based on the target brightness value of any of the backlight partitions in the enable partition set further includes: For backlight zones whose enabled state has switched from disabled to enabled, the corresponding zone drive signal is activated in advance before the leading edge of the sliding line window arrives. For the backlight partition whose enabled state has switched from enabled to disabled, the corresponding partition drive signal is turned off after a delay following the departure of the sliding line window. The early start duration and the delayed stop duration are configurable parameters, and are configured based on the change range of the target brightness of the backlight partition.

[0027] In this implementation, by introducing an asymmetric timing sequence for enabling and delaying the off state, and adaptively configuring the duration according to the brightness change amplitude, the boundary between the bright and dark areas can be smoothed, reducing the harshness of the edges and subtle flickering.

[0028] In one possible implementation, determining the safe timing window for backlight output includes: Obtain the timing interval representing the pixel voltage write or flip stage in the row scan timing signal; A timing interval for backlight output is determined outside the aforementioned timing interval as the safe timing window.

[0029] In this embodiment, by identifying the pixel voltage writing or flipping phase from the line scan timing and determining a safe timing window outside of it, the backlight output can be ensured to avoid the pixel instability phase, thereby further improving the stability of the image.

[0030] In one possible implementation, the method further includes: Establish and update a backlight partition brightness historical data buffer, wherein the historical data buffer is used to store backlight partition brightness data corresponding to a preset number of historical frames; Based on the historical data buffer, the target brightness change trend of each backlight zone in the next frame is predicted; If the predicted result indicates that the change in target brightness exceeds a first threshold, the target brightness value of the current frame is subjected to temporal smoothing filtering and / or change rate constraint processing before the partition driving signal is generated and output.

[0031] In this implementation, predicting the target brightness change trend of the next frame using historical frame data and performing temporal smoothing or change rate constraint when the change amplitude is large can suppress flicker and transient power consumption impact caused by sudden changes in partition brightness, thereby improving system reliability.

[0032] A second aspect of this application provides a partition driving device for a display system, applied to a display system including a display panel and a partition backlight unit having multiple backlight partitions, the device comprising: A pixel determination module is used to determine the pixel information corresponding to each of the backlight partitions based on image frames mapped to multiple backlight partitions; The target determination module is used to determine the target brightness value of each backlight zone based on the pixel information corresponding to each backlight zone. The position determination module is used to acquire the row scanning timing signal of the display panel, and the row scanning timing signal is used to determine the position of the current scan row; The window determination module is used to determine the sliding line window based on the current scan line position; An enable determination module is used to determine an enable partition set based on the illumination coverage relationship between each of the backlight partitions and the sliding line window coverage area. The enable partition set includes at least one of the backlight partitions that needs to be lit at present. The drive output module is used to output a partition drive signal corresponding to the backlight partition in the enable partition set according to the target brightness value of any of the backlight partitions in the enable partition set. The partition drive signal is used to make the backlight partition output a backlight brightness that matches the target brightness value.

[0033] A third aspect of this application provides a display system, the display system including a display panel, a partitioned backlight unit having multiple backlight partitions, and a partitioned driving device for the display system as described in the second aspect; The partition drive device of the display system is used to perform the method as described in the first aspect.

[0034] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described in the first aspect above.

[0035] A fifth aspect of this application provides a computer program product that, when run on a display system, causes the display system to perform the method described in the first aspect.

[0036] The beneficial effects of the second to fifth aspects mentioned above can all be referred to the beneficial effects described in the first aspect above, and will not be repeated here. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of the display system provided in the embodiments of this application; Figure 2 This is a schematic diagram of the functional module connections of the display system provided in the embodiments of this application; Figure 3 This is a flowchart corresponding to the partition color adjustment and scanning synchronization method of the display system functional modules; Figure 4 This is a flowchart illustrating the partition driving method of the display system provided in an embodiment of this application; Figure 5 This is a flowchart of crosstalk compensation calculation; Figure 6 This is an asymmetric timing control flowchart; Figure 7 This is a schematic flowchart of the partition driving device of the display system provided in the embodiments of this application; Figure 8 This is a schematic diagram of another display system provided in an embodiment of this application. Detailed Implementation

[0039] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0040] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0041] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0042] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0043] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] It should be understood that the sequence number of each step in this embodiment does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of this application embodiment.

[0045] As consumers' demands for visual experience continue to rise, high dynamic range (HDR) display has become a crucial technological direction for high-end LCD monitors. Employing Mini-LED backlighting with local dimming in separate zones—dividing the backlight into hundreds or even thousands of independently controllable zones and dynamically adjusting the brightness of each zone based on the image content—is a common technical approach to achieving high contrast and high brightness HDR image quality. However, as image quality targets continue to improve, existing local dimming solutions are gradually revealing their limitations: on the one hand, the backlight zones' ability to control color is relatively insufficient, making it difficult to meet higher levels of color performance requirements; on the other hand, there is a timing matching issue between the backlight driving process and the LCD panel refresh mechanism, which can easily lead to limitations in image stability and clarity in dynamic display scenarios, thus restricting further improvements in color performance and dynamic clarity.

[0046] To address the aforementioned issues, embodiments of this application provide a partition driving method, apparatus, and display system for a display system. The partition driving method first determines the pixel information corresponding to each backlight partition based on image frames mapped to multiple backlight partitions, enabling the driving calculation of the backlight partitions to establish a correspondence with the screen content, thereby providing a data foundation for partition-level brightness control. Second, it determines the target brightness value for each backlight partition based on the pixel information corresponding to each backlight partition, allowing the backlight output to match the local brightness requirements of the screen according to the partition, thereby improving local contrast and brightness / darkness gradation. Further, it acquires the horizontal scanning timing signal of the display panel to determine... The system determines the current scan line position and the sliding line window accordingly, establishing a timing relationship between the backlight zone's illumination decision and the LCD's line-by-line refresh process. This reduces local refresh mismatches caused by global backlight updates. Furthermore, it determines an enable zone set based on the illumination coverage relationship between the backlight zones and the sliding line window's covered area. Finally, it outputs corresponding zone drive signals based on the target brightness values ​​of each backlight zone in the enable zone set, enabling the enabled backlight zones to output backlight brightness matching the target brightness values. This achieves on-demand output with zone drive advancing sequentially, thereby improving dynamic image stability while ensuring high brightness and high contrast display effects.

[0047] The following detailed description, with reference to the figures, describes the partition driving method, apparatus, display system, computer-readable storage medium, and computer program product of the display system proposed in this application.

[0048] First, it should be noted that the partition driving method, device, and display system of this application can be applied to various scenarios with high requirements for display contrast, color performance, and dynamic clarity, including but not limited to the following fields: First, in the field of professional displays, such as professional photography post-production, video editing, and medical image diagnosis, where high requirements are placed on color accuracy, contrast, and uniformity, this application can improve partition color control capabilities and reduce crosstalk effects to meet the needs of wide color gamut and high-precision display; Second, in the field of consumer-grade TVs and gaming monitors, suitable for 4K / 8K, HDR TVs, and high refresh rate gaming monitors, it can enhance the color and contrast performance of HDR content and improve the clarity of fast-moving images; Third, in the field of mobile terminals such as laptops and tablets, it can still improve black levels, color accuracy, and dynamic clarity under the conditions of thinness and lightness and limited number of partitions. Fourth, in the field of automotive display systems, it is suitable for central control screens, digital instrument panels, and head-up displays, and can achieve regional display enhancement and improve information refresh stability in scenarios such as strong light / dark light changes and safety prompts; Fifth, in the field of virtual reality / augmented reality near-eye display, it can improve contrast and color realism and reduce discomfort caused by dynamic artifacts in scenarios with strict requirements for response speed and visual comfort; Sixth, in the field of commercial display and digital signage, it is suitable for high-value information display in exhibition halls, museums, retail stores, etc., and can improve color reproduction and dynamic playback effects; Seventh, in the field of medical and scientific research display, in addition to conventional medical imaging, it can also be used in applications with higher requirements for grayscale / color scale discrimination capabilities, such as digital pathology and astronomical spectroscopy, to reduce interference between adjacent areas and improve the ability to present subtle differences.

[0049] See Figure 1 The diagram illustrates a schematic of the display system provided in an embodiment of this application. The display system includes a display panel and a partitioned backlight unit with multiple backlight zones. The display panel is used to modulate the incident backlight under pixel voltage driving to form a display image. The partitioned backlight unit is located on the back of the display panel and includes multiple backlight zones. Each backlight zone can be driven independently to provide regionally adjustable backlight illumination for the display panel, thereby supporting a partitioned dimming / color adjustment display effect.

[0050] In one possible implementation, the partitioned backlight unit can be a Mini-LED backlight module, with the backlight partitions arranged in an M×N grid (M and N are both greater than 1). Each backlight partition can include at least three color light channel light-emitting sub-units, and each color light channel is driven independently to achieve partition-level multi-channel brightness adjustment.

[0051] In the above Figure 1 Based on the structure shown, for further explanation of how this application generates partition drive signals based on input image content and panel refresh timing, please refer to... Figure 2 .

[0052] See Figure 2 The diagram illustrates the functional module connection of a display system provided in this application embodiment. The display system can receive video input signals as image frame sources and receive line scanning timing signals related to display panel refresh as timing references. Based on the above inputs, the display system may include a processing link for generating partition drive signals: image analysis preprocessing is used to parse image frames and map pixel data to backlight partitions to determine the pixel information corresponding to each backlight partition; post-frame buffer analysis and prediction is used to analyze continuous multi-frame image / partition data and provide brightness change trends to suppress flicker and power consumption impact caused by inter-frame abrupt changes; partition target color light calculation is used to determine the initial brightness value of each backlight partition based on pixel information and compensate the initial brightness value based on optical crosstalk estimation to obtain the target brightness value; scan synchronization scheduling is used to determine the current scan line position and form a sliding line window based on the line scanning timing signal, thereby determining the set of enabled partitions; backlight drive signal generation is used to generate and output partition drive signals to the partition backlight units for the backlight partitions in the set of enabled partitions based on the target brightness value, thereby driving the corresponding backlight partitions to emit light in a timing sequence that matches the line scanning timing.

[0053] To further explain the specific execution order and cyclic update method of the above functional modules within a one-frame scan cycle, please refer to [link / reference]. Figure 3 .

[0054] See Figure 3 The diagram illustrates a flowchart of a partitioned color adjustment and scan synchronization method corresponding to a functional module of a display system. Specifically, the display system first processes a frame of image and performs image analysis and mapping processing on the image frame, mapping pixel data to an M×N backlight partition grid. Then, it performs partitioned color calculation processing to obtain the driving-related parameters for each backlight partition. Next, the display system obtains the current scan line position and determines the set of enabled partitions corresponding to the current scan line position based on the scan synchronization decision. After determining the set of enabled partitions, the display system executes the drive signal generation and output steps, outputting the corresponding drive signals to the enabled partitions. Subsequently, it updates the scan line position corresponding to the sliding window and updates the set of enabled partitions accordingly. It then determines whether the current frame scan is complete; if not, it returns to the scan synchronization decision and drive output process to continue execution until the frame scan is completed. After the frame scan is completed, it enters the next frame and repeats the above process.

[0055] In summary, combining Figures 1 to 3 As shown, the display system of this application embodiment consists of a display panel and a partitioned backlight unit at the hardware level. At the functional level, it forms a complete partitioned drive link through modules such as image analysis and preprocessing, partitioned target color light calculation, scan synchronization scheduling, and backlight drive signal generation. At the operational level, it follows... Figure 3 The process shown advances within a frame and executes cyclically between frames to achieve partitioned backlight drive output based on the input image content and panel refresh timing. This provides a system structure and execution flow basis for the specific implementation methods of target brightness determination, crosstalk compensation, synchronization control and drive output in subsequent method embodiments.

[0056] Additionally, it should be noted that, Figure 2 The names of the functional modules shown are only for ease of understanding of the functional division and signal interaction relationships in the embodiments of this application, and do not constitute a limitation of this application. Without departing from the technical solution of this application, those skilled in the art can merge, split, or use different naming methods to achieve the same or similar functions according to implementation needs. Therefore, the module names in subsequent device embodiments are similar to those in the embodiments of this application. Figure 2 Even if the module names shown are inconsistent, they should still be considered to fall within the protection scope of this application.

[0057] The following is combined with Figure 4 The flowchart shown further illustrates the partition driving method of the display system provided in the embodiments of this application. It should be noted that the following method embodiments use… Figure 4 The following is a typical process described to illustrate the specific execution steps and optional implementation methods of the method in this application. Without conflict, the execution order, merging or splitting of each step can be adjusted according to the actual display panel timing, backlight partition scale and implementation requirements. Furthermore, this application does not restrict the parameter values, calculation methods and specific implementation carriers in each step.

[0058] See Figure 4 This document illustrates a flowchart of a partitioning driving method for a display system provided in an embodiment of this application; specifically, see [link to relevant documentation]. Figure 4 The method may include the following steps: Step 401: Based on the image frames mapped to the multiple backlight partitions, determine the pixel information corresponding to each backlight partition.

[0059] Among them, an image frame refers to a frame of image data to be displayed by the display system within a display cycle. It is used to characterize the content of the frame and serves as the input object for subsequent backlight zone driving calculations.

[0060] Among them, the backlight zone is an independent controllable unit in the zoned backlight unit. Multiple backlight zones can be arranged in M ​​rows × N columns. Each backlight zone corresponds to a part of the display area on the display panel and is used to provide backlight illumination to that area.

[0061] Pixel information refers to the image content information related to a certain backlight partition extracted from the image frame. It originates from the pixel data of the image frame and establishes a correspondence with the backlight partition, which is used to determine the driving parameters of the backlight partition in the future.

[0062] Mapping refers to allocating the pixel data of an image frame to a logical grid composed of multiple backlight partitions according to the spatial arrangement of the backlight partitions, so that each backlight partition can be associated with its corresponding pixel data range, thereby realizing the correspondence between image content and backlight partitions.

[0063] Specifically, in step 401, the display system first acquires an image frame and reads the pixel data of the image frame; then, the display system logically constructs a logical grid consistent with the backlight partitions according to the spatial arrangement of multiple backlight partitions, and maps the pixel data of the image frame onto the logical grid; after the mapping is completed, the display system can determine the corresponding pixel information for each backlight partition, so that subsequent steps can perform partition-level driving calculations based on the pixel information corresponding to each backlight partition.

[0064] For example, when the backlight zones of the partitioned backlight unit are arranged in M ​​rows × N columns, the display system can logically divide the display area corresponding to the image frame into corresponding logical grid units in the same M rows × N columns, and associate the pixel data falling into each logical grid unit with the corresponding backlight zone; thus, each backlight zone can obtain its corresponding pixel information.

[0065] In one possible implementation, each backlight partition of the partitioned backlight unit includes at least three color light channels, each of which is driven independently; based on image frames mapped to multiple backlight partitions, pixel information corresponding to each backlight partition is determined, including: The image frame is divided into multiple logical regions corresponding to the number of backlight partitions according to the partition grid. For each backlight zone, determine the set of pixels within the corresponding logical area; Statistical features of at least three color light channels are extracted from the pixel set, and the statistical features are determined as the pixel information corresponding to the backlight partition.

[0066] Specifically, in this embodiment, the image source inputs an image frame to the display system. The resolution of the image frame can be consistent with the physical resolution of the display panel; for example, when the display panel has a 4K resolution, the input image frame can be 3840×2160. After acquiring the image frame, the display system divides the image frame into multiple logical regions corresponding to the number of backlight zones according to the partition grid, thereby establishing a correspondence between the high-resolution image of the pixel domain and the low-resolution grid of the backlight sub-region.

[0067] Subsequently, for each backlight zone, the display system determines the set of pixels within the corresponding logical area. Taking the (i,j)th backlight zone as an example, this backlight zone corresponds to a rectangular display area on the display panel. The display system can traverse all pixels (x,y) within this rectangular area and determine the set of pixels obtained from the traversal as the set of pixels for the (i,j)th backlight zone, thereby completing the determination of which pixels correspond to this backlight zone.

[0068] After obtaining the pixel set, the display system extracts statistical features from at least three color light channels of the pixel set and uses these statistical features as the pixel information corresponding to the backlight partition. For example, the channel brightness distribution characteristics of pixels within the partition can be statistically analyzed for the red, green, and blue color light channels respectively: for example, for the (i,j)th backlight partition, the brightness values ​​of the R channel, G channel, and B channel are statistically analyzed in its pixel set, and the 99.5 percentile of each channel brightness value is calculated. Alternatively, if HDR metadata exists, the corresponding channel statistical value can be determined based on the maximum brightness position specified by the HDR metadata, and the obtained statistical results are used as the statistical features of the color light channels corresponding to the backlight partition. By adopting the above statistical method, on the one hand, the brightness information related to highlights within the partition can be preserved, and on the other hand, the excessive influence of individual noisy pixels on the statistical results can be avoided, thereby reducing the risk of the backlight partition being abnormally inflated.

[0069] Through the above steps, this embodiment realizes the "aggregation" mapping of pixel data of input image frames onto the backlight partition logical grid, that is, completes the dimensionality reduction mapping from the pixel domain to the backlight partition, and obtains pixel information for characterizing at least three color light channels of each backlight partition, providing a data basis for subsequent calculation of target brightness values ​​and adaptive control of each backlight partition.

[0070] Step 402: Determine the target brightness value of each backlight zone based on the pixel information corresponding to each backlight zone.

[0071] In one possible implementation, determining the target brightness value of each backlight zone based on the pixel information corresponding to each backlight zone may include: first determining the initial brightness value of each backlight zone based on the pixel information corresponding to each backlight zone; and then performing compensation processing on the initial brightness value to obtain the target brightness value of each backlight zone. For example, the initial brightness value may be compensated based on optical crosstalk estimation to obtain the target brightness value of each backlight zone.

[0072] That is, the target brightness value of the backlight zone can be obtained by compensating the initial brightness value of the backlight zone, so that the target brightness value can further meet the expected display output requirements while maintaining the correspondence with the pixel information.

[0073] In another possible implementation, if the display effect requirements are met, the initial brightness value may not be compensated. Instead, the initial brightness value of each backlight zone may be directly determined as the target brightness value of each backlight zone to simplify the calculation process and reduce implementation complexity.

[0074] Alternatively, other methods can be used to compensate for the initial brightness value to obtain the target brightness value. For example, the initial brightness value can be adjusted according to system preset parameters or display control strategies to obtain the target brightness value used to drive the backlight zone output.

[0075] The following details how to compensate for the initial brightness value based on optical crosstalk prediction to obtain the target brightness value for each backlight zone.

[0076] Pixel information refers to the image content information corresponding to a certain backlight partition. It is obtained by partition mapping and statistical extraction of the pixel data of the image frame and is used to characterize the brightness or color characteristics of the display area corresponding to the backlight partition in the current frame.

[0077] The initial brightness value refers to the preliminary brightness value determined for each backlight zone (and its color light channel) before crosstalk compensation is performed. In the embodiments of this application, the initial brightness value can be the driving demand value after nonlinear mapping, which is used to compensate for the photoelectric conversion nonlinearity of the display link, making it more suitable for subsequent crosstalk compensation calculation.

[0078] Among them, optical crosstalk prediction refers to the prediction of the light contribution of adjacent backlight zones to the display area covered by the target backlight zone based on the cross-zone influence caused by optical diffusion between backlight zones, so as to obtain the amount of crosstalk used for compensation.

[0079] The target brightness value refers to the brightness parameter obtained after optical crosstalk compensation of the initial brightness value. It is used to characterize the actual brightness level that the target backlight zone should output after considering the crosstalk effect of adjacent zones, and serves as the basis for generating the zone driving signal in the future.

[0080] Specifically, in step 402, the display system first determines the initial brightness value of each backlight zone based on its corresponding pixel information, ensuring that the initial brightness value reflects the brightness requirements of the corresponding display area in the image frame. Subsequently, the display system compensates for the initial brightness value based on optical crosstalk estimation: during the estimation process, the display system considers the potential optical diffusion and cross-regional effects of the partitioned backlight units, estimates the light superposition contribution of other backlight zones to the display area corresponding to the target backlight zone, and corrects the initial brightness value of the target backlight zone accordingly to obtain the target brightness value. Through this processing, the target brightness value incorporates the influence of optical crosstalk during determination, thereby providing more reasonable brightness parameters for the subsequent generation and output of partition driving signals.

[0081] In one possible implementation, the statistical features include at least the distribution statistical features of pixel brightness values; determining the target brightness value of each backlight zone based on the pixel information corresponding to each backlight zone includes: For each color light channel of any backlight zone, the first brightness value of that color light channel is determined based on the distribution statistical characteristics. A non-linear mapping transformation is performed on the first brightness value to obtain the initial brightness value of each backlight zone; The initial brightness value is compensated to obtain the target brightness value for each backlight zone.

[0082] Specifically, after obtaining the pixel information corresponding to each backlight zone in step 401, the display system enters the process of determining the initial brightness value: First, for each color light channel of any backlight zone, the display system determines the first brightness value of the color light channel based on the brightness distribution statistical characteristics in the pixel information, so that the first brightness value can characterize the basic brightness level of the backlight zone on the color light channel; then, considering the photoelectric conversion characteristics of the display system, it is not accurate to directly use the linear brightness value for driving, so the display system performs a nonlinear mapping transformation on the first brightness value, converting the first brightness value into an initial brightness value that is more suitable for driving calculation, thereby compensating for the nonlinearity of the display link.

[0083] For example, taking the C color channel of the (i,j)th backlight zone as an example (c∈{R,G,B}), the display system can use the first brightness value as the original brightness requirement of that color channel. And using a preset gamma value The original brightness requirement is mapped and transformed to obtain a linearized driving demand value. As the initial brightness value of this color channel in the backlight zone, its mapping relationship satisfies:

[0084] in, The gamma value is preset. As can be seen from the above example, this embodiment introduces gamma mapping in the initial brightness value determination stage, so that the initial brightness value is more in line with the photoelectric conversion law of the display system, and provides a more accurate input basis for subsequent crosstalk compensation calculation.

[0085] In one possible implementation, compensating the initial brightness value to obtain the target brightness value for each backlight zone includes: Obtain the set of adjacent backlight zones for each backlight zone; For the target backlight partition, based on the initial brightness value of each backlight partition in the set of adjacent backlight partitions, the crosstalk value of each adjacent backlight partition to the target backlight partition is determined according to the preset crosstalk weight coefficient and the preset compensation intensity coefficient. The target backlight partition is any backlight partition among the backlight partitions. The target backlight partition is compensated based on all crosstalk values ​​of the target backlight partition, and the compensated brightness value is subjected to an inverse nonlinear mapping transformation to obtain the target brightness value of the corresponding color light channel of the target backlight partition.

[0086] Specifically, to suppress crosstalk caused by light diffusion, this embodiment adopts a compensation approach: the light presented on the screen by the target backlight partition and perceived by the observer can be regarded as the superposition of the light emitted by the target backlight partition itself and the light leaked from the adjacent backlight partitions; therefore, in order to obtain a purer color light output from the target backlight partition, the portion of light expected to leak from the adjacent backlight partitions can be subtracted from its driving correlation quantity in advance when driving the target backlight partition, so as to achieve crosstalk suppression.

[0087] For example, taking the C color channel of the (i,j)th backlight zone as an example (c∈{R,G,B}), the display system first obtains the set of adjacent backlight zones of the (i,j)th backlight zone. The set of adjacent backlight zones typically includes eight adjacent zones surrounding the current backlight zone (or more adjacent zones depending on the optical model used). In the previous embodiment, the initial brightness values ​​(i.e., linearized drive demand values) for each backlight zone were obtained. Based on this, the display system uses the initial brightness values ​​of each backlight zone in the adjacent backlight zone set, according to a preset crosstalk weighting coefficient. and preset compensation strength coefficient The crosstalk contribution of adjacent backlight zones to the (i,j)th backlight zone is determined, and compensation calculation is performed on the (i,j)th backlight zone to obtain the compensated driving value. It can be calculated by the following formula:

[0088] in, Used to quantitatively describe the backlight partitioning of the light source The emitted light diffuses into the target backlight zone The proportion of the corresponding observation area. Through the above compensation calculation, it is equivalent to deducting the expected light contribution from leakage from adjacent areas before driving the (i,j)th backlight zone, thereby reducing color pollution and boundary dirtiness caused by crosstalk.

[0089] The compensated driving value was calculated. The display system then converts it back to the luminance domain to obtain the final target luminance value used to drive the output. For example, an inverse transformation of the mapping function can be performed on the compensated driving value. ,get:

[0090] in, For mapping functions The inverse transform of . This yields This is the target driving brightness value of the C color light channel corresponding to the (i,j)th backlight zone after crosstalk compensation. The target driving brightness value is used to generate and output the zone driving signal, so that the actual presentation of the target backlight zone is closer to its expected color light output, and the local color purity and display consistency are improved.

[0091] In one possible implementation, determining the crosstalk weighting coefficient includes: The interval distance parameter between backlight zones is determined based on the geometric distance between them. Based on preset optical diffusion characteristic parameters and crosstalk weighting coefficients determined according to interval distance parameters, the sum of crosstalk weighting coefficients of each adjacent backlight partition to the target backlight partition is less than the preset upper limit.

[0092] Specifically, in this embodiment, the crosstalk weighting coefficient is used to characterize the proportion of light influence diffused from the light source backlight partition to the corresponding observation area of ​​the target backlight partition. Its magnitude is related to the spatial distance between the backlight partitions and the optical diffusion characteristics. Therefore, the display system can first determine the inter-partition distance parameters based on the geometric positional relationship between the backlight partitions, for example, using the backlight partitions... Center and backlight partition The geometric distance between the centers is used as the distance parameter. This is used to reflect the relative distance between two partitions. After obtaining the distance parameter, the crosstalk weight coefficient is determined by combining it with the preset optical diffusion characteristic parameter, so that the smaller the distance between the partitions, the larger the crosstalk weight coefficient, thus conforming to the physical intuition of light diffusion.

[0093] For example, in this embodiment, a Gaussian diffusion model can be used to estimate the crosstalk weighting coefficient, that is, the crosstalk weighting coefficient... Represented as interval distance The decay function satisfies:

[0094] in, For backlight partitioning Center and backlight zones Geometric distance between centers; The standard deviation of the Gaussian distribution is used to reflect the range of light diffusion, and it can be determined by the distance between the center of the partition. With optical half-angle It is derived that; The normalization coefficient is used to scale the overall weights. Using the Gaussian model described above, the diffusion law of "the greater the distance, the weaker the crosstalk" can be described in a relatively simple form, thus enabling the calculable determination of the crosstalk weight coefficients.

[0095] Furthermore, to ensure that the crosstalk weighting coefficients are physically reasonable and to avoid overcompensation, this implementation method... The value of is constrained so that for any backlight zone that acts as a light source, the sum of the crosstalk weighting coefficients caused by its light to all other backlight zones is less than a preset upper limit (e.g., 0.3), in order to meet the reasonable leakage ratio requirement under the meaning of energy conservation.

[0096] Furthermore, the compensation strength coefficient in this embodiment It can be used as an empirical safety factor to address optical model errors and system nonlinearity: when Time indicates compensation according to the theoretical model; when When it indicates a more aggressive approach to compensation to suppress crosstalk; when The time indicated that compensation was more conservative to reduce the risk of overcompensation, among which The value can be set from 0.5 to 2.0. By setting the above parameters, the balance between crosstalk suppression and stability can be flexibly adjusted for different panels, optical structures, and screen content.

[0097] For the above process, please refer to Figure 5 The diagram illustrates the crosstalk compensation calculation flowchart. On one hand, gamma correction is performed on the original luminance data of the three primary colors of the target partition to obtain the corrected driving value. On the other hand, unified gamma correction is performed on the original luminance data of the three primary colors of adjacent partitions, and the crosstalk weight of each adjacent partition is calculated based on the optical model and the partition distance to obtain the total estimated crosstalk amount. Then, the corrected driving value of the target partition and the total crosstalk amount are compensated and synthesized (i.e., the crosstalk amount is deducted), and then restored to the linear luminance domain through inverse gamma correction. Finally, the compensated driving luminance value of the target partition (i.e., the target luminance value) is output.

[0098] Step 403: Obtain the row scan timing signal of the display panel.

[0099] Among them, the row scan timing signal refers to the timing signal used to characterize the row-by-row refresh process of the display panel. It is used to indicate which row the display panel is currently in during the scan / refresh cycle and to determine the current scan row position.

[0100] The current scan line position refers to the line sequence position of the display panel during the current frame scan. It is used to characterize the line or line range that the display panel is currently scanning, so as to establish a line position reference consistent with the line-by-line scan in the method flow.

[0101] Step 404: Determine the sliding line window based on the current scan line position.

[0102] The sliding line window refers to a display line area that covers several consecutive lines of the display panel, determined based on the current scan line position. It moves along the scanning direction as the current scan line position changes, and is used to limit the range of display lines that need to be focused on during the line scanning process.

[0103] Specifically, in step 404, the display system determines the current scan line position based on the line scan timing signal to characterize the line refresh progress of the display panel during the current frame scan. After determining the current scan line position, the display system determines the sliding line window based on the current scan line position, so that the sliding line window corresponds to the scan line position of the display panel during the line scan, thereby providing a line domain range basis for subsequent steps to perform partition selection and drive output based on the display line area covered by the sliding line window.

[0104] In one possible implementation, determining the sliding line window based on the current scan line position includes: Determine the window height parameter H; Based on the current scan line position and the window height parameter H, determine the leading edge and trailing edge positions of the sliding line window so that the sliding line window covers a continuous display area of ​​H lines. The sliding line window moves along the scanning direction as the current scan line position changes.

[0105] Specifically, after acquiring the row scanning timing signal of the display panel and determining the current scan row position, the display system further determines the window height parameter H. Subsequently, based on the current scan row position and the window height parameter H, the leading edge row position and the trailing edge row position of the sliding line window are determined, so that the sliding line window covers a continuous H-row display area. Furthermore, during the row scanning process, as the current scan row position advances with the scanning direction, the sliding line window moves accordingly with the scanning direction, thereby forming a window range that advances with the row within the frame, which is used to define the display row area that needs to be focused on.

[0106] In one possible implementation, determining the window height parameter H includes: The lower limit of the window height parameter H is determined based on the liquid crystal pixel response time, backlight zone rise time, and single-line scan time, and the window height parameter H is configured to a value not less than the lower limit.

[0107] Specifically, in this embodiment, the scanning window height H is a parameter with dynamic configuration capability: H can be initialized to a preset value when the system starts. During system operation, the value of H can be... Based on the image content, dynamic adjustments are made. To ensure a stable transition in timing between backlight illumination and liquid crystal pixel response, this embodiment sets a theoretical minimum lower limit for H. And it is stipulated that H at any given time is not less than .

[0108] For example, the theoretical minimum lower bound This can be determined by the system's physical characteristics. Specifically, the maximum response time of the liquid crystal pixel is added to the rise time of the backlight zone from being off to the target brightness stabilizing, to obtain the minimum time span required for the system to complete the state switch. Then, the minimum number of lines is calculated by converting it to the single-line scan time and rounding up, thus determining the minimum number of lines. .For example, It can be determined by the following formula:

[0109] in, This is the slowest response time for liquid crystal molecules (e.g., from black to white or from white to black), typically ranging from 5ms to 15ms. The rise time required for the backlight zone to stabilize from being off to reaching the target brightness is typically on the order of 0.1ms to 1ms. The time required for the LCD panel to scan one line, for example, for a display panel with a refresh rate of 60Hz and a total of 2160 lines. ; The rounding up operation ensures sufficient window coverage time for the LCD and backlight to complete the state switch. Therefore, when H needs to be dynamically adjusted during operation, the adjusted H can be limited to a value not less than... The value is set to ensure that the scanning window has sufficient coverage span in terms of time sequence.

[0110] In another possible implementation, determining the window height parameter H further includes: Image analysis preprocessing is performed on image frames to obtain vertical high-frequency feature markers; When the scan line range corresponding to the sliding line window matches the display line range corresponding to the vertical high-frequency feature mark, the window height parameter H is reduced to a value not less than the lower limit. When the sliding line window leaves the display row range, increase the window height parameter H to the preset value.

[0111] Specifically, in this embodiment, the window height parameter H has the ability to be dynamically adjusted based on its theoretical minimum lower limit constraint, and the vertical high-frequency feature marker can be used as one of the adjustment bases for H. The display system performs image analysis preprocessing on the image frame, identifies and marks the areas in the image that exhibit obvious high-frequency features in the vertical direction, and converts the marker into the corresponding display line range to indicate which display line ranges belong to the "vertical high-frequency region".

[0112] For example, during a frame scan, when the sliding line window advances to match the display line range corresponding to the vertical high-frequency feature mark, the display system can dynamically reduce the window height parameter H within the corresponding scan cycle of that frame, for example, reducing H to the lower limit or slightly above the lower limit. By "narrowing" the window, the display line range covered by the backlight can more closely follow the advancement of the liquid crystal scan line, thereby reducing response lag caused by insufficient backlight following in areas with obvious vertical edges. After the sliding line window leaves the display line range, the display system can increase the window height parameter H to a preset value to balance brightness stability and overall display effect in non-vertical high-frequency areas, thus achieving adaptive window height configuration between different image content areas.

[0113] Steps 403 and 404 establish a correspondence between the backlight partition lighting and the LCD line-by-line refresh in time and space, enabling the backlight output to maintain precise synchronization with the LCD refresh process and avoiding local LCD state mismatch caused by global backlight update.

[0114] Furthermore, the configurable and dynamic adjustment mechanism of the window height parameter H introduces content adaptive capability to this synchronization process: when displaying static or horizontally structured images, a larger window can be used to reduce update frequency and power consumption, while when displaying dynamic or vertically edged images, a smaller window can be switched to make the backlight illumination range more closely follow the scan line, thereby improving dynamic clarity and image stability.

[0115] Step 405: Determine the set of enabled zones based on the illumination coverage relationship between each backlight zone and the sliding line window coverage area.

[0116] Among them, the illumination coverage relationship refers to the coverage and influence relationship of the backlight emitted by the backlight zone on a certain display row area of ​​the display panel. It is used to characterize whether the light emitted by a certain backlight zone will make an effective illumination contribution to the display row area covered by the sliding window.

[0117] The set of enabled partitions includes at least one backlight partition that needs to be lit up at present.

[0118] Specifically, in step 405, after determining the sliding line window, the display system uses the display row area covered by the sliding line window as the target area, evaluates the illumination coverage relationship between each backlight partition and the target area, and determines the set of enabled partitions accordingly. Specifically, the display system determines for each backlight partition whether its emitted light effectively covers and contributes to the area covered by the sliding line window; when the illumination coverage relationship between a backlight partition and the area covered by the sliding line window meets a preset condition, the backlight partition is included in the current set of enabled partitions; otherwise, it is not included. Through this method, the display system can obtain the current set of enabled partitions corresponding to the current sliding line window at each moment, providing a basis for subsequently outputting partition drive signals only to the backlight partitions in that set.

[0119] In one possible implementation, based on the illumination coverage relationship between each backlight partition and the sliding line window coverage area, a set of currently enabled partitions that meet preset conditions is determined, including: Based on the geometric mapping relationship between each backlight zone and the display area of ​​the display panel, the illumination coverage contribution parameters of each backlight zone to the display area covered by the current sliding line window are determined. Backlight zones whose illumination coverage contribution parameters meet the preset threshold conditions are identified as the set of enabled zones. The currently enabled partition set is updated based on the current scan row position.

[0120] Specifically, in this embodiment, the display system can receive the line synchronization signal and frame synchronization signal from the display panel to obtain the timing reference for progressive scanning. At the start of a frame scan, the display system determines a sliding line window linked to the current scan line position, wherein the sliding line window corresponds to a continuous display line area on the display panel. Subsequently, based on the pre-stored geometric mapping relationship between the backlight partitions and the display area of ​​the display panel, the display system calculates the illumination coverage contribution parameter of each backlight partition to the display area covered by the current sliding line window; the illumination coverage contribution parameter can be used to quantify the average contribution intensity of the light emitted by a certain backlight partition to the display area, and can be normalized to a value within a preset range.

[0121] For example, taking the sliding window at the current scan row position g as an example, the sliding window can cover the area from row g to row g+H. The display system defines a single row of display areas (where H is the window height parameter). Based on the geometric mapping relationship between the backlight partitions and the display area of ​​the display panel, the display system calculates the illumination coverage contribution parameter between each backlight partition and the H-row display area. Backlight partitions that meet preset threshold conditions (e.g., the coverage contribution parameter is not less than threshold τ) are identified and enabled, thus forming a set of currently enabled partitions corresponding to the current scan row position. As the line synchronization signal is periodically triggered within the frame, indicating that the scan row position advances line by line, the display system updates the current scan row position accordingly and recalculates the illumination coverage contribution parameter of each backlight partition to the updated sliding line window covering the display area, dynamically updating the set of currently enabled partitions. For example, when the scan row position advances from g to g+1, the display system can update the set of enabled partitions corresponding to g and determine the backlight partitions that exit from the previous set and the new backlight partitions that enter, thereby updating the set of enabled partitions with the scan row position.

[0122] Step 406: Output the partition drive signal corresponding to the backlight partition in the enable partition set according to the target brightness value of any of the backlight partitions in the enable partition set.

[0123] Among them, the zone drive signal refers to the electrical drive signal used to drive the backlight zone to emit light. It is used to make the backlight zone output backlight brightness match the target brightness value, thereby providing the required backlight illumination for the display panel.

[0124] Specifically, in step 406, the display system first obtains the set of enabled partitions determined in step 405, and only drives the backlight partitions in the current set of enabled partitions. Then, the display system reads the target brightness value corresponding to each backlight partition in the current set of enabled partitions, and generates a partition drive signal matching the backlight partition drive interface based on the target brightness value. Finally, the display system outputs the partition drive signal to the corresponding backlight partition, causing the backlight partition to output backlight according to its target brightness value. Through this method, this step achieves partition drive output of "selection by set, output according to target brightness," ensuring that the actual light emission of the backlight partition is consistent with the previously calculated target brightness value.

[0125] In one possible implementation, outputting a partition drive signal corresponding to the backlight partition in the enable partition set based on the target brightness value of any of the backlight partitions in the enable partition set includes: Determine the safe timing window for backlight output; For each backlight channel in the current set of enabled zones, determine the duty cycle parameter of pulse width modulation based on the target brightness value. The corresponding partition drive signal is generated based on the duty cycle parameter and the pulse width modulation carrier frequency; Within the safe timing window, output the zone drive signal to the color light channel of the corresponding backlight zone.

[0126] Specifically, in this embodiment, the driving signal generation side can receive target brightness value data for each backlight zone, as well as enable control signals and timing signals for indicating the currently enabled zone set. The target brightness value can be represented as a target brightness value data matrix covering each backlight zone and each color light channel. The enable control signal is used to indicate the set of backlight zones that currently require output drive signals. Timing signals are used to indicate the timing relationship between backlight output and display panel refresh in order to determine the safe timing window for backlight output.

[0127] After determining the safe timing window, the drive signal generation side only targets the currently enabled partition set. The backlight partitions within the system perform the calculation and generation of PWM drive signals. For example, for the currently enabled set... Any backlight zone in and its C color channel ( (This can be based on the target brightness value of this color channel) Calculate the corresponding PWM duty cycle This is to convert the target brightness value into a duty cycle parameter that the driver can use; for example, the duty cycle can satisfy the following relationship:

[0128] in, The maximum brightness of the C-color channel light-emitting subunit under the maximum driving current is a constant determined by the hardware. The driving gamma value is used to compensate for the nonlinear relationship between the brightness of the light-emitting sub-unit and the driving current, so as to make the duty cycle parameter and the target brightness value have a more stable correspondence.

[0129] After obtaining the duty cycle parameters, the PWM signal generator can generate the corresponding zone drive signal according to the preset pulse width modulation carrier frequency, and output it to the color light channel light-emitting sub-unit of the corresponding backlight zone within the safe timing window. For example, the PWM signal generator can use a fixed frequency of 10kHz as the carrier frequency to enable the set... The duty cycle of each color channel output in each backlight zone is The pulse signal is applied to the corresponding light-emitting sub-unit through the driver chip, so that the backlight zone outputs a backlight brightness that matches its target brightness value within the safe timing window; for those not belonging to the currently enabled zone set... For backlight zones, the zone drive signal may not be output or may remain in an off state to achieve a zone drive mechanism that "outputs drive only to enabled zones".

[0130] In another possible implementation, outputting a partition drive signal corresponding to the backlight partition in the enable partition set based on the target brightness value of any of the backlight partitions in the enable partition set further includes: Receive an enable control signal, which is used to control the backlight partition in the set of enabled partitions to enter the enabled state; For the backlight partition in the enabled partition set, read the target brightness value corresponding to each color light channel of the backlight partition from the preset cache; The read target brightness value is converted into the corresponding duty cycle parameter and loaded into the pulse width modulation signal generation unit; Within the safe timing window, the output objects of pulse width modulation are switched between different backlight zones according to the preset scheduling order, so that the pulse width modulation signal generation unit outputs the zone drive signal to multiple backlight zones in the same scan cycle.

[0131] Specifically, for the backlight partitions in the current set of enabled partitions, the drive signal generation side can read the target brightness value corresponding to each color light channel of the backlight partition from the preset cache, convert the target brightness value into the corresponding duty cycle parameter and load it into the pulse width modulation signal generation unit; then, within the safe timing window, the output object of pulse width modulation is switched between different backlight partitions according to the preset scheduling order, so that the pulse width modulation signal generation unit outputs partition drive signals to multiple backlight partitions in the same scan cycle, thereby reducing the pulse width modulation resource occupation while realizing the partition-by-partition drive output of the current set of enabled partitions.

[0132] In another possible implementation, outputting a partition drive signal corresponding to the backlight partition in the enable partition set based on the target brightness value of any of the backlight partitions in the enable partition set further includes: For backlight zones whose enabled state changes from disabled to enabled, the corresponding zone drive signal is activated in advance before the leading edge of the sliding line window arrives. For backlight zones whose enabled state changes from enabled to disabled, the corresponding zone drive signal is turned off after the sliding line window leaves the trailing edge. The early start duration and delayed stop duration are configurable parameters, and are configured based on the variation of the target brightness of the backlight zones.

[0133] Specifically, for backlight zones that switch from disabled to enabled, the display system activates the corresponding zone drive signal in advance, just before the leading edge of the sliding line window reaches the corresponding display area of ​​the backlight zone, thus entering [the next step]. Figure 6The "look-through activation phase" is shown; during this phase, the partition drive signal gradually increases, causing the brightness of the backlight partition to gradually reach the target brightness value, so that the output of the backlight partition has stabilized when the liquid crystal pixels begin to respond. Subsequently, while the sliding line window covers the corresponding display area of ​​the backlight partition, the display system enters... Figure 6 The "continuous illumination phase" shown maintains the target brightness value of the backlight zone, providing stable backlight for the liquid crystal pixels.

[0134] For backlight zones whose enabled state changes from enabled to disabled, the display system delays disabling the corresponding zone drive signal after the sliding line window leaves the corresponding display area of ​​the backlight zone, i.e., it enters... Figure 6 The "delayed shutdown phase" is shown; during this phase, the zone drive signal can be gradually reduced, causing the brightness of the backlight zone to gradually return to zero, and then the shutdown is complete. Figure 6 The "partition shutdown" shown above. By using the delayed shutdown process described above, the sharp edges or subtle flickering caused by the backlight suddenly turning off at the window boundary can be avoided.

[0135] In this embodiment, the early activation duration and delayed shutdown duration are configurable parameters and can be configured based on the change in target brightness of the backlight zones. For example, when a large change in target brightness is detected, the early activation duration or delayed shutdown duration can be increased accordingly to achieve a smoother transition; when a small change in target brightness is detected, the duration can be decreased to reduce additional lighting time. Figure 6 The asymmetric timing control shown, which involves forward-looking on, continuous illumination, and delayed off, can smooth the brightness changes of backlight zones at the spatiotemporal boundaries, reducing subtle flickering or harsh edges caused by rapid switching, thereby optimizing the visual smoothness and viewing comfort of dynamic images.

[0136] In the above embodiments, determining the safe timing window for backlight output includes: Obtain the timing interval representing the pixel voltage write or flip stage in the row scan timing signal; A timing interval outside the timing interval is defined as a safe timing window for backlight output.

[0137] Specifically, when the display system executes the partition drive signal output, it first acquires the row scan timing signal of the display panel and identifies the timing interval related to pixel voltage writing or flipping from the row scan timing signal. This interval characterizes the time period during which the display panel writes pixel voltage or flips the state of the current scan row. Since the pixel voltage is in the writing or flipping process during this time period, the display state may experience transient instability. To avoid the backlight output overlapping with this unstable phase and causing subtle flickering or abnormal edge perception, the display system selects a timing interval outside the specified timing interval for backlight output and defines this timing interval as the safe timing window for backlight output. Subsequently, the display system can output partition drive signals to the backlight partitions in the currently enabled partition set within the safe timing window, thereby allowing the backlight output to avoid the pixel voltage writing or flipping phase, improving the stability of the display and viewing comfort.

[0138] In one possible implementation, the method further includes: Establish and update the backlight partition brightness historical data buffer. The historical data buffer is used to store the backlight partition brightness data corresponding to a preset number of historical frames. Predict the target brightness change trend of each backlight zone in the next frame based on historical data buffer; If the predicted result indicates that the change in target brightness exceeds the first threshold, the target brightness value of the current frame is subjected to temporal smoothing filtering and / or change rate constraint processing before the partition driving signal is generated and output.

[0139] Specifically, in this embodiment, when the display system continuously processes the input video sequence, it can continuously perform inter-frame analysis on the backlight partition brightness data. To this end, the display system establishes a backlight partition brightness historical data buffer, and after each frame is processed, it writes the target brightness value corresponding to each backlight partition (and its color channel) of that frame into the historical data buffer, ensuring that the historical data buffer always stores a preset number of historical frame data. For example, the preset number can be 3 to 5 frames, thus forming a historical buffer containing the color data of each partition from the most recent few frames, used to reflect the trajectory of backlight partition brightness changes over time.

[0140] After obtaining the historical data buffer, the display system predicts the target brightness change trend of each backlight partition in the next frame based on the buffer data. For example, taking the C color channel of the (i,j)th backlight partition (c∈{R,G,B}) as an example, the display system can predict the brightness change trend of the channel in the next frame based on the brightness records of that partition in multiple frames in the historical data buffer, which is used to characterize the direction and magnitude of the brightness change in the next frame. When the prediction result indicates that the target brightness change magnitude in the next frame exceeds a preset threshold, i.e., a drastic jump may occur, the display system can perform temporal smoothing filtering on the target brightness value calculated in the current frame to make the target brightness value present a smoother transition between frames; for example, a light temporal low-pass filter can be used to suppress abrupt changes. Alternatively, the display system can also impose a rate-of-change constraint on the target brightness value to limit the rate of brightness change between adjacent frames, thereby avoiding large increases and decreases in the brightness of the backlight partition in a short period of time.

[0141] After completing the above smoothing filtering and / or rate-of-change constraint processing, the display system generates and outputs partition drive signals based on the processed target brightness value, ensuring continuous and stable drive output between frames. As illustrated above, this embodiment utilizes historical frame buffering and trend prediction to smooth the target brightness value between frames after crosstalk compensation calculation, suppressing instantaneous power consumption surges, electromagnetic noise interference, and flicker caused by rapid backlight changes. Furthermore, the predictive smoothing mechanism can synergize with the aforementioned asymmetric timing control mechanism, further enhancing the stability and viewing comfort of the display image, while also improving the reliability of system operation.

[0142] In the above method embodiment, the display system first extracts pixel information based on the input image frame and calculates the target brightness value of each backlight zone accordingly. Simultaneously, it determines the current scan line position and sliding line window by combining the line scanning timing of the display panel, and selects an enable zone set based on the illumination coverage relationship, achieving targeted gating of the backlight zones during the line scanning process. Subsequently, it generates and outputs zone driving signals within a safe timing window, and can smooth the zone brightness / dullness boundaries through time-division multiplexing and asymmetric timing control. Furthermore, by establishing a brightness history data buffer and performing trend prediction, it applies inter-frame smoothing or change rate constraints to the target brightness value, thereby suppressing flicker and power consumption fluctuations caused by rapid backlight changes. Therefore, this embodiment can improve dynamic clarity and image stability while enhancing contrast and color performance, and strengthen the reliability of the display system operation.

[0143] See Figure 7 The diagram shows a schematic flow chart of the partition driving device of the display system provided in the embodiments of this application; for ease of explanation, only the parts related to the embodiments of this application are shown.

[0144] The device is configured in a display system, which includes a display panel and a partitioned backlight unit with multiple backlight zones.

[0145] The partition drive device 700 of the display system may specifically include: The pixel determination module 701 is used to determine the pixel information corresponding to each of the backlight partitions based on the image frames mapped to the multiple backlight partitions; The target determination module 702 is used to determine the target brightness value of each backlight zone based on the pixel information corresponding to each backlight zone. The position determination module 703 is used to acquire the row scanning timing signal of the display panel, and the row scanning timing signal is used to determine the position of the current scan row; The window determination module 704 is used to determine the sliding line window based on the current scan line position; The enable determination module 705 is used to determine an enable partition set based on the illumination coverage relationship between each of the backlight partitions and the sliding line window coverage area. The enable partition set includes at least one of the backlight partitions that needs to be lit at present. The drive output module 706 is used to output a partition drive signal corresponding to the backlight partition in the enable partition set according to the target brightness value of any of the backlight partitions in the enable partition set. The partition drive signal is used to make the backlight partition output a backlight brightness that matches the target brightness value.

[0146] It should be noted that, for the sake of convenience and brevity, the specific uses or working processes of each module in the partition drive device 700 of the above display system can be referred to the corresponding processes of each implementation in the above method embodiments, and will not be repeated here.

[0147] See Figure 8 This illustration shows a schematic diagram of another display system provided in an embodiment of this application. Figure 8 As shown, the display system 800 of this embodiment includes: at least one processor 810 ( Figure 8 (Only one is shown) a processor, a memory 820, and a computer program 821 stored in the memory 820 and capable of running on at least one processor 810. When the processor 810 executes the computer program 821, it implements the steps in the above-described embodiment of the partition driving method for the display system.

[0148] The display system 800 may be an LED display screen, an LCD display screen, or a miniLED display screen, etc. This display system may include, but is not limited to, a processor 810 and a memory 820. Those skilled in the art will understand that... Figure 8This is merely an example of the display system 800 and does not constitute a limitation on the display system 800. It may include more or fewer components than shown in the figure, or combine certain components, or different components, such as input / output devices, network access devices, etc.

[0149] The processor 810 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0150] In some embodiments, memory 820 may be an internal storage unit of the display system 800, such as a hard disk or memory of the display system 800. In other embodiments, memory 820 may be an external storage device of the display system 800, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the display system 800. Furthermore, memory 820 may include both internal and external storage units of the display system 800. Memory 820 is used to store operating systems, applications, boot loaders, data, and other programs, such as program code for computer programs. Memory 820 may also be used to temporarily store data that has been output or will be output.

[0151] In specific implementations, the processor 810, memory 820, and computer program 821 described in the embodiments of this application can execute the embodiments of the partition driving method of the display system of this application, which will not be repeated here.

[0152] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0153] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0154] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0155] In the embodiments provided in this application, it should be understood that the disclosed apparatus / display system and method can be implemented in other ways. For example, the apparatus / display system embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0156] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0157] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0158] If an integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0159] The implementation of all or part of the processes in the methods of the above embodiments can also be accomplished by a computer program product. When the computer program product runs on the display screen, it enables the display system to implement the steps in the various method embodiments described above.

[0160] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A partition driving method for a display system, characterized in that, The display system includes a display panel and a partitioned backlight unit having multiple backlight zones, and the method includes: Based on image frames mapped to multiple backlight partitions, determine the pixel information corresponding to each backlight partition; The target brightness value of each backlight zone is determined based on the pixel information corresponding to each backlight zone; The row scan timing signal of the display panel is obtained, and the row scan timing signal is used to determine the position of the current scan row; The sliding line window is determined based on the current scan line position; Based on the illumination coverage relationship between each of the backlight zones and the sliding window coverage area, an enable zone set is determined, the enable zone set including at least one of the backlight zones that needs to be lit at present; Based on the target brightness value of any of the backlight partitions in the set of enabled partitions, output the partition drive signal corresponding to the backlight partition in the set of enabled partitions. The partition drive signal is used to make the backlight partition output a backlight brightness that matches the target brightness value.

2. The method as described in claim 1, characterized in that, Each backlight zone of the partitioned backlight unit includes at least three color light channels, and each color light channel is driven independently. Based on image frames mapped to multiple backlight zones, determine the pixel information corresponding to each backlight zone, and determine the target brightness value of each backlight zone according to the pixel information, including: The image frame is divided into multiple logical regions corresponding to the number of backlight partitions according to the partition grid. For each of the backlight partitions, determine the set of pixels within the corresponding logical region; Statistical features of the at least three color light channels are extracted from the pixel set, and the statistical features are determined as the pixel information corresponding to the backlight partition; The initial brightness value of the backlight zone is determined based on the statistical characteristics, and the initial brightness value is compensated to obtain the target brightness value of the backlight zone.

3. The method as described in claim 2, characterized in that, The step of compensating the initial brightness value to obtain the target brightness value for each of the backlight zones includes: Obtain the set of adjacent backlight zones for each of the aforementioned backlight zones; For a target backlight partition, based on the initial brightness value of each backlight partition in the set of adjacent backlight partitions, the crosstalk value of each of the adjacent backlight partitions to the target backlight partition is determined according to a preset crosstalk weighting coefficient and a preset compensation intensity coefficient. The target backlight partition is any one of the backlight partitions. The target backlight partition is compensated based on all crosstalk values ​​of the target backlight partition, and the compensated brightness value is subjected to an inverse nonlinear mapping transformation to obtain the target brightness value of the corresponding color light channel of the target backlight partition.

4. The method according to any one of claims 1 to 3, characterized in that, Determining the sliding line window based on the current scan line position includes: Determine the window height parameter H; Based on the current scan line position and the window height parameter H, determine the leading edge position and trailing edge position of the sliding line window, so that the sliding line window covers a continuous H-line display area; The sliding line window moves along the scanning direction as the position of the current scan line changes.

5. The method as described in claim 4, characterized in that, The determination of the window height parameter H includes: The lower limit of the window height parameter H is determined based on the liquid crystal pixel response time, backlight zone rise time, and single-line scan time, and the window height parameter H is configured to a value not less than the lower limit; and / or The image frames are subjected to image analysis preprocessing to obtain vertical high-frequency feature markers; When the scan line range corresponding to the sliding line window matches the display line range corresponding to the vertical high-frequency feature mark, the window height parameter H is reduced to a value not less than the lower limit value. When the sliding line window leaves the display row range, the window height parameter H is increased to a preset value.

6. The method according to any one of claims 1 to 3, characterized in that, The determination of the enable partition set based on the illumination coverage relationship between each of the backlight partitions and the sliding line window coverage area includes: Based on the geometric mapping relationship between each backlight partition and the display area of ​​the display panel, the illumination coverage contribution parameters of each backlight partition to the display area covered by the current sliding line window are determined. The backlight zones whose illumination coverage contribution parameters meet the preset threshold conditions are determined as the set of enabled zones; The enabled partition set is updated based on the current scan line position.

7. The method as described in any one of claims 2 or 3, characterized in that, The step of outputting the partition drive signal corresponding to the backlight partition in the enable partition set based on the target brightness value of any backlight partition in the enable partition set includes: Determine the safe timing window for backlight output; For each of the backlight channels in the set of enabled zones, the duty cycle parameter of pulse width modulation is determined based on the target brightness value. The corresponding partition drive signal is generated based on the duty cycle parameter and the pulse width modulation carrier frequency; Within the safety timing window, the partition drive signal is output to the color light channel of the corresponding backlight partition.

8. The method as described in claim 7, characterized in that, The step of outputting the partition drive signal corresponding to the backlight partition in the enable partition set based on the target brightness value of any of the backlight partitions in the enable partition set further includes: For backlight zones whose enabled state has switched from disabled to enabled, the corresponding zone drive signal is activated in advance before the leading edge of the sliding line window arrives. For the backlight partition whose enabled state has switched from enabled to disabled, the corresponding partition drive signal is turned off after a delay following the departure of the sliding line window. The early start duration and delayed stop duration are configurable parameters, and are configured based on the variation of the target brightness of the backlight zones.

9. A partition driving device for a display system, characterized in that, Applied to a display system, the display system including a display panel and a partitioned backlight unit having multiple backlight zones, the device includes: A pixel determination module is used to determine the pixel information corresponding to each of the backlight partitions based on image frames mapped to multiple backlight partitions; The target determination module is used to determine the target brightness value of each backlight zone based on the pixel information corresponding to each backlight zone. The position determination module is used to acquire the row scanning timing signal of the display panel, and the row scanning timing signal is used to determine the position of the current scan row; The window determination module is used to determine the sliding line window based on the current scan line position; An enable determination module is used to determine an enable partition set based on the illumination coverage relationship between each of the backlight partitions and the sliding line window coverage area. The enable partition set includes at least one of the backlight partitions that needs to be lit at present. The drive output module is used to output a partition drive signal corresponding to the backlight partition in the enable partition set according to the target brightness value of any of the backlight partitions in the enable partition set. The partition drive signal is used to make the backlight partition output a backlight brightness that matches the target brightness value.

10. A display system, characterized in that, The display system includes a display panel, a partitioned backlight unit having multiple backlight zones, and a partitioned driving device for the display system as described in claim 9. The partition drive device of the display system is used to perform the method as described in any one of claims 1 to 8.

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