Data processing method and device

Abstract

The present application provides a data processing method and apparatus, wherein the data processing method comprises the steps of: acquiring current frame image data and a synchronization signal of the current frame image data; processing the current frame image data to acquire current frame local dimming data; and outputting the current frame local dimming data according to the synchronization signal of the current frame image data. Since the output start time of the current frame local dimming data is earlier than the output end time of the current frame image data, and the output end time of the current frame local dimming data is later than the output end time of the current frame image data, the output time of the current frame local dimming data and the output time of the current frame image data are partially overlapped. Through this configuration, the liquid crystal panel and the backlight unit display the same frame data, thereby improving display quality.

Description

Technology Field

[0001] This application claims priority to Chinese patent application No. 202211131139.0, filed with the Chinese Patent Office on September 16, 2022, titled “Method and apparatus for data processing,” the entire contents of which are incorporated by reference into this application.

[0002] The present invention relates to the field of display technology, and in particular to a data processing method and apparatus. Background Technology

[0003] In display devices, in addition to the Liquid Crystal Display (LCD) panel displaying images, Light-Emitting Diodes (LEDs) are generally applied to the backlight unit (BLU) to enhance the display effect.

[0004] Data that controls the light emission of a backlight unit is generally referred to as local dimming data, while data that controls the display of a liquid crystal panel is referred to as image data. Local dimming data is generated based on image data, and since local dimming data is generally smaller than image data, all local dimming data is typically collected before output to prevent local dimming data from being output before image data.

[0005] Therefore, a delay occurs in the output between local dimming data and image data, and the output delay time is greater than the output duration of one frame of image data; that is, the backlight unit and the liquid crystal panel display different frame data, resulting in a problem of degraded display quality. The problem to be solved

[0006] The present application provides a data processing method and apparatus for solving the problem of degraded display quality caused by a backlight unit and a liquid crystal panel displaying different frames. means of solving the problem

[0007] One embodiment of the present application provides a data processing method, wherein the method is,

[0008] A step of acquiring current frame image data and a synchronization signal of the current frame image data;

[0009] A step of processing current frame image data to obtain current frame local dimming data; and

[0010] It includes a step of outputting current frame local dimming data according to a synchronization signal of current frame image data;

[0011] The output start time of the current frame's local dimming data is earlier than the output end time of the current frame's image data, and the output end time of the current frame's local dimming data is later than the output end time of the current frame's image data.

[0012] In some embodiments, the step of outputting current frame local dimming data according to a synchronization signal of current frame image data is specifically:

[0013] The method includes a step of determining the output start time of each local dimming sub-data according to the synchronization signal of the current frame image data; and a step of outputting the local dimming sub-data at the output start time of each local dimming sub-data;

[0014] The current frame local dimming data includes multiple local dimming sub-data, and the output start time of each local dimming sub-data is later than the output start time of the pixel data corresponding to the local dimming sub-data.

[0015] In some embodiments, prior to the step of outputting current frame local dimming data according to a synchronization signal of current frame image data, the method also:

[0016] It includes the step of performing filtering processing on current frame local dimming data and caching the filtered current frame local dimming data; wherein the caching time is shorter than the time required to cache all data of the current frame local dimming data.

[0017] In some embodiments, the step of processing current frame image data to obtain current frame local dimming data, performing filtering processing on the current frame local dimming data, and caching the filtered current frame local dimming data is specifically:

[0018] A step of inputting current frame image data into an extraction circuit to obtain current frame local dimming data output from the extraction circuit;

[0019] A step of inputting current frame local dimming data into a filtering circuit to obtain filtered current frame local dimming data output from the filtering circuit; and

[0020] It includes the step of inputting filtered current frame local dimming data into a caching circuit to obtain cached current frame local dimming data output from the caching circuit.

[0021] In some embodiments, after the step of outputting current frame local dimming data according to a synchronization signal of current frame image data, the method also:

[0022] A step of controlling the backlight unit to be disconnected from the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data do not overlap;

[0023] The method includes the step of controlling the backlight unit to connect to the power terminal during the time period when the output time period of the current frame local dimming data and the output time period of the current frame image data overlap, and driving the backlight unit according to the current frame local dimming data.

[0024] In some embodiments, the step of controlling the backlight unit to be cut off from the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data do not overlap is specifically:

[0025] It includes a step of controlling the backlight unit to be disconnected from the power terminal at the start of outputting the current frame image data;

[0026] Accordingly, the step of controlling the backlight unit to connect to the power terminal during the time period when the output time period of the current frame local dimming data and the output time period of the current frame image data overlap, and driving the backlight unit according to the current frame local dimming data, is specifically:

[0027] It includes a step of controlling the backlight unit to connect to the power terminal at the start of outputting the current frame local dimming data.

[0028] In some embodiments, the step of controlling the backlight unit to be cut off from the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data do not overlap is specifically:

[0029] It includes a step of controlling the backlight unit to be disconnected from the power terminal at the start of outputting the current frame image data;

[0030] Accordingly, the step of controlling the backlight unit to connect to the power terminal during the time period when the output time period of the current frame local dimming data and the output time period of the current frame image data overlap, and driving the backlight unit according to the current frame local dimming data, is specifically:

[0031] The method includes the step of controlling the backlight unit to be disconnected from the power terminal, and, after a delay time has elapsed, controlling the backlight unit to be connected to the power terminal;

[0032] Here, the delay time is the output delay time between the start time of outputting the current frame local dimming data and the start time of outputting the current frame image data.

[0033] In some embodiments, the step of controlling the backlight unit to connect to the power terminal during the time period when the output time period of the current frame local dimming data and the output time period of the current frame image data overlap, and driving the backlight unit according to the current frame local dimming data, specifically:

[0034] Includes a step of controlling the backlight unit to be connected to the power terminal at the start of outputting the current frame local dimming data;

[0035] Accordingly, the step of controlling the backlight unit to be disconnected from the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data do not overlap is specifically:

[0036] The method includes the step of controlling the backlight unit to connect to the power terminal, and after an overlapping time has elapsed, controlling the backlight unit to disconnect from the power terminal;

[0037] Here, the overlap time is the time during which the output time of the current frame's local dimming data and the output time of the current frame's image data overlap.

[0038] One embodiment of the present application provides a controller, wherein the controller includes a processor and a memory connected to the processor in communication;

[0039] Memory stores computer execution commands;

[0040] The processor executes computer execution instructions stored in memory to implement the method mentioned in the above embodiment.

[0041] One embodiment of the present application provides a display device, wherein the display device comprises a backlight unit, a source driver, a liquid crystal panel, and a controller mentioned in the embodiment. Effects of the invention

[0042] In the data processing method and apparatus provided in the present application, current frame image data and a synchronization signal of the current frame image data are obtained, the current frame image data is processed to obtain current frame local dimming data, and the current frame local dimming data is output according to the synchronization signal of the current frame image data. Since the output start time of the current frame local dimming data is earlier than the output end time of the current frame image data and the output end time of the current frame local dimming data is later than the output end time of the current frame image data, the output time of the current frame local dimming data and the output time of the current frame image data are partially overlapped, thereby driving a liquid crystal panel and a backlight unit with the image data and local dimming data of the same frame, the display quality of the display device is improved. Brief explanation of the drawing

[0043] The attached drawings described herein are incorporated into the specification and constitute part of the specification, illustrate embodiments conforming to the present application, and are used together with the specification to interpret the principles of the present application. Figure 1 is a schematic diagram of the structure of a display device. Figure 2 is a schematic diagram showing the relationship between the liquid crystal panel and the backlight unit. Figure 3 is a diagram showing the timing relationship between local dimming data and image data. FIG. 4 is a flowchart of a data processing method provided in one embodiment of the present application. FIG. 5 is a diagram showing the timing relationship between local dimming data and image data after using the data processing method provided in the embodiment of the present application. FIG. 6 is a flowchart of a data processing method provided in another embodiment of the present application. FIG. 7 is a circuit structure diagram of a controller provided in one embodiment of the present application. FIG. 8 is a diagram showing the timing relationship between another local dimming data and image data after using the data processing method provided in the embodiment of the present application. FIG. 9 is a diagram showing the timing relationship between another local dimming data and image data after using the data processing method provided in the embodiment of the present application. FIG. 10 is a diagram showing the timing relationship between another local dimming data and image data after using the data processing method provided in the embodiment of the present application. FIG. 11 is a diagram of the control principle of a backlight unit after using the data processing method provided in an embodiment of the present application. FIG. 12 is a schematic diagram of the structure of a controller provided in one embodiment of the present application. 100, Controller; 110, Extraction Circuit; 120, Filtering Circuit; 130, Caching Circuit; 140, Transmission Circuit; 200, LCD Driver; 300, Liquid Crystal Panel; 400, Backlight Unit; 410, LED Driver; 420, LED Array; 202, Dimming Area; 201, Pixel; 500, Controller; 501, Memory; 502, Processor Although specific embodiments of the present application have been illustrated in the attached drawings, they will be described in more detail below. These drawings and textual descriptions are not intended to limit the scope of the spirit of the present application in any way, but are intended to explain the concept of the present application to those skilled in the art by reference to specific embodiments. Specific details for implementing the invention

[0044] Exemplary embodiments will be described in detail below, as illustrated in the accompanying drawings. In the following description, where in association with the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise specified. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are merely examples of apparatus and methods consistent with some aspects of this application as described in detail in the appended claims.

[0045] As illustrated in FIG. 1, the display device includes a controller (100), an LCD driver (200), a liquid crystal panel (300), and a backlight unit (400), and the backlight unit (400) includes an LED driver (410) and an LED array (420).

[0046] The controller (100) is connected to the LCD driver (200), the LCD driver (200) is connected to the liquid crystal panel (300), the controller (100) is also connected to the LED driver (410), and the LED driver (410) is connected to the LED array (420).

[0047] The controller (100) generates image data based on video data, and the controller (100) also generates local dimming data based on the image data. The LCD driver (200) receives the image data and drives the liquid crystal panel (300) based on the image data. The LED driver (410) receives the local dimming data and drives the LED array (420) based on the local dimming data.

[0048] As illustrated in FIG. 2, a backlight unit (400) provides a backlight light source to a liquid crystal panel (300) to enhance the display effect of the liquid crystal panel (300). When the backlight unit (400) provides a backlight light source to the liquid crystal panel (300), the liquid crystal panel (300) may be divided into multiple regions, and each region includes multiple pixels (201). The LED light emission level is adjusted on a region-by-region basis, and data controlling the LED light emission level corresponding to the region is called local dimming data (LDD). Each region is called a dimming region (202).

[0049] Generally, there is a difference between the output time of image data and local dimming data output from the controller (100). Assuming that the time taken between when the controller (100) receives video data and when the controller (100) outputs image data is △τ0, the output delay time △τ3 between the start time of outputting local dimming data and the start time of outputting image data is greater than the output duration of one frame image data, and the output duration of one frame image data is denoted as △T.

[0050] The difference in output time between local dimming data and image data varies depending on the algorithm that generates the local dimming data. Generally, a dimming algorithm program is stored in the controller (100) so that the controller (100) implements the function of generating local dimming data.

[0051] In order to generate local dimming data quickly and reduce the output delay time Δτ3 between the start time of local dimming data output and the start time of image data output, the microprocessor (Micro Control Unit, abbreviated as MCU) executing the dimming algorithm program must occupy more resources. The resources occupied by the microprocessor are limited, meaning there is a limit to reducing the output delay time Δτ3 between the start time of local dimming data output and the start time of image data output by increasing the amount of resources occupied.

[0052] In addition, since the amount of local dimming data is smaller than that of image data and the time required to output local dimming data is shorter than the time required to output image data, partial local dimming data should not be output immediately when generating it; instead, it should be output after all local dimming data has been collected.

[0053] Therefore, considering the time required to generate local dimming data and the time to collect and cache all local dimming data, the output delay time △τ3 between the start time of outputting local dimming data and the start time of outputting image data is generally between 1×△T and 2×△T.

[0054] As illustrated in FIG. 3, an example is given in which the value of the output delay time △τ3 between the start time of outputting local dimming data and the start time of outputting image data is △T. The controller (100) receives video data, extracts image data from the video data, and outputs it. The time elapsed from the time the controller (100) receives video data to the time the controller (100) outputs image data is △τ0. The value of the output delay time △τ3 between the start time of outputting local dimming data and the start time of outputting image data is △T. The output delay time △τ3 includes the time △τ1 required to calculate local dimming data based on image data and the time △τ2 required to cache local dimming data to collect all local dimming data.

[0055] In other words, when the Nth frame image data is output, the (N-1)th frame local dimming data is output. When the (N+1)th frame image data is output, the Nth frame local dimming data is output. That is, the local dimming data output at the same time as the output image data is the local dimming data of the previous frame, so the image data and the local dimming data do not match at all.

[0056] However, if the liquid crystal panel (300) and the backlight unit (400) display image data and local dimming data of different frames at the same time, the display quality of the display device is degraded.

[0057] To solve the above technical problem, the present application provides a data processing method and apparatus for solving the problem of degraded display quality caused by a backlight unit and a liquid crystal panel displaying data of different frames.

[0058] As illustrated in FIG. 4, one embodiment of the present application provides a data processing method applied to a controller (100), the method comprising the following steps:

[0059] S101, obtains the current frame image data and the synchronization signal of the current frame image data.

[0060] In this step, video data is acquired, and the current frame image data and the synchronization signal of the current frame image data are extracted from the video data.

[0061] The synchronization signal of the current frame image data may be a horizontal synchronization signal (Hsync) and / or an effective display data strobe signal (DE).

[0062] S102 processes the current frame image data to obtain the current frame local dimming data.

[0063] At this stage, the current frame image data is processed using an extraction circuit to obtain the current frame local dimming data. The extraction circuit may utilize existing circuit implementation methods, which will not be described further.

[0064] S103 outputs current frame local dimming data according to the synchronization signal of the current frame image data. Here, the start time of outputting the current frame local dimming data is earlier than the end time of outputting the current frame image data, and the end time of outputting the current frame local dimming data is later than the end time of outputting the current frame image data.

[0065] At this stage, the output start time t2 of the current frame local dimming data is determined according to the synchronization signal of the current frame image data, and the current frame local dimming data is output at the output start time t2 of the current frame local dimming data.

[0066] Here, as shown in FIG. 5, when calculating the output start time t2 of the current frame local dimming data according to the synchronization signal of the current frame image data, the output start time t2 of the current frame local dimming data is earlier than the output end time t3 of the current frame image data, and the output end time t4 of the current frame local dimming data is later than the output end time t3 of the current frame image data, so that the output time of the current frame local dimming data and the output time of the current frame image data partially overlap.

[0067] By making the output start time t2 of the current frame local dimming data faster than the output end time t3 of the current frame image data, the output delay time △τ3 between the output start time of the current frame local dimming data and the output start time of the current frame image data is reduced so that the output delay time △τ3 is smaller than △T. By making the output end time t4 of the current frame local dimming data later than the output end time t3 of the current frame image data, the local dimming sub-data of the current frame local dimming data is prevented from being output before the pixel data corresponding to the local dimming sub-data, thereby driving the liquid crystal panel (300) and the backlight unit (400) with the image data and local dimming data of the same frame, the display quality of the display device is improved.

[0068] In the above technical method, current frame image data and a synchronization signal of the current frame image data are obtained, the current frame image data is processed to obtain current frame local dimming data, and the current frame local dimming data is output according to the synchronization signal of the current frame image data so that the output time of the current frame local dimming data and the output time of the current frame image data partially overlap, thereby driving the liquid crystal panel (300) and the backlight unit (400) with the image data and local dimming data of the same frame, thereby improving the display quality of the display device.

[0069] As illustrated in FIGS. 6 and 7, one embodiment of the present application provides a data processing method applied to a controller (100), the method comprising the following steps:

[0070] S201, acquires the current frame image data and the synchronization signal of the current frame image data.

[0071] S202 processes the current frame image data to obtain the current frame local dimming data.

[0072] At this stage, current frame image data is input into the extraction circuit (110), and the current frame image data is processed using the extraction circuit (110) to obtain current frame local dimming data, and current frame local dimming data output from the extraction circuit (110) is obtained. The extraction circuit (110) may use a conventional circuit implementation method, and this is not described further.

[0073] S203 performs filtering processing on the current frame local dimming data and caches the filtered current frame local dimming data.

[0074] At this stage, current frame local dimming data is input to a filtering circuit (120), and the current frame local dimming data is processed through the filtering circuit (120) to obtain filtered current frame local dimming data output from the filtering circuit (120). The filtering circuit (120) may use a conventional circuit implementation method, and this is not described further.

[0075] Filtered current frame local dimming data is input into a caching circuit (130), and the current frame local dimming data is cached through the caching circuit (130) to obtain the current frame local dimming data output from the caching circuit (130). The caching circuit (130) may use a conventional circuit implementation method, and this is not described further.

[0076] Here, the caching time of the caching circuit (130) is shorter than the time required to cache all data of the current frame local dimming data, that is, the caching circuit (130) caches only a portion of the current frame local dimming data and then outputs the cached current frame local dimming data.

[0077] In some embodiments, the current frame local dimming data includes a plurality of local dimming sub-data, and the caching circuit (130) outputs a portion of the current frame local dimming data after caching it consecutively. For example: the caching circuit (130) caches the first local dimming sub-data and the second local dimming sub-data, and then outputs the first local dimming sub-data and the second local dimming sub-data. Then, it caches the third local dimming sub-data and the fourth local dimming sub-data.

[0078] In the above technical solution, by caching only a portion of the current frame local dimming data and then outputting the cached current frame local dimming data, the output delay time △τ3 between the start time of outputting the current frame local dimming data and the start time of outputting the current frame image data is reduced.

[0079] By using an internal working clock, local dimming data is generated using an extraction circuit (110) and a filtering circuit (120), compared to processing image data with a dimming algorithm program to output local dimming data, and the time required to generate local dimming data is shortened, thereby reducing the output delay time △τ3 between the start time of outputting the current frame local dimming data and the start time of outputting the current frame image data.

[0080] In some embodiments, more desirable extraction circuits (110) and filtering circuits (120) may be designed, for example: circuits with a smaller footprint or circuits with lower power consumption may be designed.

[0081] Referring further to FIG. 5, by processing image data using an extraction circuit (110) and a filtering circuit (120), the time Δτ1 required to generate local dimming data is minimized, and the caching time of the caching circuit (130) is shorter than the time required to cache all data of the current frame local dimming data. By outputting the local dimming data before caching all local dimming data, the time Δτ2 required to cache the local dimming data is minimized, and the output time of the local dimming data is advanced so that the output time of the local dimming data approaches the output time of the image data.

[0082] Through this configuration, the value of the output delay time △τ3 between the start time of outputting the current frame local dimming data and the start time of outputting the current frame image data is controlled to be smaller than △T. That is, the output of the current frame local dimming data starts before the output of the current frame image data is completed. In this case, the output delay time △τ3 between the start time of outputting the current frame local dimming data and the start time of outputting the current frame image data is the time △τ1 of extracting image data from video data and generating local dimming data using the extraction circuit (110) and the filtering circuit (120), and the caching time △τ2 of starting output after caching a certain amount of local dimming data.

[0083] The output delay time △τ3 between the start time of outputting the current frame local dimming data and the start time of outputting the current frame image data cannot be reduced to 0. This is because, in order to generate local dimming data, pixel data within the dimming area (202) must be collected, and generally, pixel data within other dimming areas (202) surrounding the dimming area (202) is combined to generate local dimming data for the dimming area (202). In this case, more pixel data must be acquired to output local dimming data for one dimming area (202). However, since it is generally not necessary to generate the first local dimming data only after acquiring one frame image data, the first local dimming data can be output before the outputting of the current frame image data is completed, so that the output time of the current frame local dimming data and the output time of the current frame image data partially overlap.

[0084] S204 outputs current frame local dimming data according to the synchronization signal of the current frame image data, wherein the start time of outputting the current frame local dimming data is earlier than the end time of outputting the current frame image data, and the end time of outputting the current frame local dimming data is later than the end time of outputting the current frame image data.

[0085] At this stage, the transmission circuit (140) receives local dimming data output from the caching circuit (130) and also receives a synchronization signal for image data. The transmission circuit (140) outputs the current frame local dimming data according to the synchronization signal for the current frame image data.

[0086] As illustrated in FIGS. 8 and 9, the current frame local dimming data includes a plurality of local dimming sub-data. The synchronization signal of the current frame image data is a horizontal synchronization signal (Hsync) and / or a plurality of effective display data strobe signals (DE).

[0087] In some embodiments, the output start time of each local dimming sub-data is determined according to the synchronization signal of the current frame image data. Additionally, the local dimming sub-data is output at the output start time of each local dimming sub-data.

[0088] Here, the output start time of each local dimming sub-data is later than the output start time of the pixel data corresponding to the local dimming sub-data. The pixel data corresponding to the local dimming sub-data refers to the pixel data within the dimming area (202) corresponding to the local dimming sub-data.

[0089] Through this configuration, the local dimming sub-data of the current frame's local dimming data is prevented from being output before the pixel data corresponding to the local dimming sub-data, thereby ensuring that the local dimming sub-data and the pixel data corresponding to the local dimming sub-data are output in synchronization, and thus improving the display quality of the display device.

[0090] In some embodiments, an effective display data strobe signal of local dimming data is generated according to a synchronization signal of the current frame image data, and the output start time of each local dimming sub-data is determined based on the effective display data strobe signal of the local dimming data.

[0091] Compared to outputting current frame local dimming data after all current frame image data has been output, outputting current frame local dimming data based on the synchronization signal of the image data does not require the caching circuit (130) to cache all local dimming data, so the caching time of the local dimming data is shorter, the capacity of the caching circuit (130) can be reduced or the caching circuit (130) can be removed, and it is possible to implement that the output start time t2 of the local dimming data approaches the output start time t1 of the image data.

[0092] S205 controls the backlight unit to be disconnected from the power terminal during a time period when the output time period of the current frame local dimming data and the output time period of the current frame image data do not overlap, controls the backlight unit to be connected to the power terminal during a time period when the output time period of the current frame local dimming data and the output time period of the current frame image data overlap, and drives the backlight unit according to the current frame local dimming data.

[0093] At this stage, the generation time of local dimming data is shortened by using the extraction circuit (110) and the filtering circuit (120), and the capacity of the caching circuit (130) is reduced or caching is not performed, so that the value of the output delay time △τ3 between the start time of output of the current frame local dimming data and the start time of output of the current frame image data is smaller than △T.

[0094] An overlapping region, that is, a segment that coincides with each other, is ensured between the output times of the current frame image data and the current frame local dimming data. The smaller the output delay time △τ3 between the start time of output of the current frame local dimming data and the start time of output of the current frame image data, the longer the segment that coincides with each other becomes, and the display quality of the display device is further improved.

[0095] However, the output delay time △τ3 between the start time of output of the current frame local dimming data and the start time of output of the current frame image data does not decrease to 0, and there is still a period in which the current frame image data and the current frame local dimming data do not match.

[0096] As illustrated in FIGS. 10 and 11, in order to further improve the display quality, the backlight unit (400) is controlled to be disconnected from the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data do not overlap, that is, during a period in which the current frame local dimming data and the current frame image data do not match, so that the backlight unit (400) stops providing a backlight light source, thereby allowing only the liquid crystal panel (300) to perform a display during the period in which they do not match.

[0097] At the time when the output time of the current frame local dimming data and the output time of the current frame image data overlap, that is, in the section where the current frame local dimming data and the current frame image data match, the backlight unit (400) is controlled to be connected to the power terminal, and the backlight unit (400) is driven according to the current frame local dimming data so that the backlight unit (400) provides a backlight light source, thereby allowing the liquid crystal panel (300) and the backlight unit (400) to perform display simultaneously in the matched section.

[0098] In the matching section, the liquid crystal panel (300) and the backlight unit (400) perform display simultaneously, and in the non-matching section, the liquid crystal panel (300) performs display alone, thereby preventing the liquid crystal panel (300) and the backlight unit (400) from displaying different frame data, thereby improving display quality.

[0099] In some embodiments, the output start time t1 of the current frame image data is obtained, and at the output start time t1 of the current frame image data, the backlight unit (400) is controlled to be disconnected from the power terminal. At the output start time t2 of the current frame local dimming data, the backlight unit (400) is controlled to be connected to the power terminal.

[0100] In some embodiments, at the start time t1 of the output of the current frame image data, the backlight unit (400) is controlled to be disconnected from the power terminal. After the backlight unit (400) is controlled to be disconnected from the power terminal and after the output delay time has elapsed, the backlight unit (400) is controlled to be connected to the power terminal. The output delay time is the output delay time △τ3 between the start time of the output of the current frame local dimming data and the start time of the output of the current frame image data.

[0101] In some embodiments, the time required to generate the first local dimming sub-data and the time for the caching circuit to cache a plurality of local dimming sub-data are calculated to obtain an output delay time Δτ3.

[0102] In some embodiments, at the start time t2 of the output of the current frame local dimming data, the backlight unit (400) is controlled to be connected to the power terminal, and after the overlap time has elapsed, the backlight unit (400) is controlled to be disconnected from the power terminal, wherein the overlap time is the overlap time △τ4 between the output time of the current frame local dimming data and the output time of the current frame image data.

[0103] In some embodiments, the output delay time △τ3 is calculated, and the overlap time △τ4 is calculated based on the output duration of one frame image data and the output delay time △τ3.

[0104] Through this configuration, at a time when the output time of the current frame local dimming data and the output time of the current frame image data do not overlap, the backlight unit (400) is disconnected from the power terminal and controlled to stop the backlight unit (400) from providing a backlight light source, and at a time when the output time of the current frame local dimming data and the output time of the current frame image data overlap, the backlight unit (400) is connected to the power terminal and the backlight unit (400) is driven according to the current frame local dimming data, thereby controlling the backlight unit (400) to provide a backlight light source.

[0105] In the above technical method, local dimming data is generated using an extraction circuit (110) and a filtering circuit (120) to reduce the generation time of the local dimming data, and local dimming data is output according to the synchronization signal of the image data. When a part of the local dimming data is generated, it is output immediately, thereby reducing the data caching time. Through this configuration, the output delay time △τ3 between the start time of outputting the current frame local dimming data and the start time of outputting the current frame image data is reduced, so that the output time of the current frame local dimming data partially overlaps with the output time of the current frame image data. In the non-overlapping section, the backlight unit (400) is cut off from the power terminal, thereby preventing the liquid crystal panel (300) and the backlight unit (400) from displaying different frame data, and thus improving the display quality.

[0106] As illustrated in FIG. 12, one embodiment of the present application provides an electronic device (500) comprising a memory (501) and a processor (502).

[0107] Here, memory (501) stores computer instructions that the processor can execute;

[0108] When the processor (502) executes computer instructions, it implements each step of the method according to the embodiments. Specifically, one may refer to the relevant descriptions of the aforementioned method embodiments.

[0109] Optionally, the memory (501) may be configured independently or integrated with the processor (502). If the memory (501) is configured independently, the electronic device further includes a bus connecting the memory (501) and the processor (502).

[0110] An embodiment of the present application further provides a computer-readable storage medium, wherein computer instructions are stored in the computer-readable storage medium, and when a processor executes the computer instructions, each step of the method according to the embodiment is implemented.

[0111] Embodiments of the present application further provide a computer program product comprising computer instructions, and when said computer instructions are executed by a processor, each step of the method according to said embodiment is implemented.

[0112] Those skilled in the art will readily conceive of other embodiments of this application by considering the specification and the embodiments of the invention disclosed herein. This application is intended to encompass any modifications, uses, or custom variations of this application, such modifications, uses, or custom variations follow the general principles of this application and include common knowledge or conventional technical means in the art that are not disclosed in this application. The specification and embodiments are to be regarded merely as illustrative, and the true scope and spirit of this application are indicated by the claims below.

[0113] It should be understood that the present application is not limited to the exact structure depicted in the attached drawings described above, and that various modifications and changes are possible without departing from the scope thereof. The scope of the present application is limited only by the appended claims. Explanation of the symbols delete

Claims

Claim 1 A data processing method comprising: a step of acquiring current frame image data and a synchronization signal of said current frame image data; a step of processing said current frame image data to acquire current frame local dimming data; and a step of outputting said current frame local dimming data according to the synchronization signal of said current frame image data, wherein the output start time of said current frame local dimming data is earlier than the output end time of said current frame image data and the output end time of said current frame local dimming data is later than the output end time of said current frame image data, and the step of outputting said current frame local dimming data according to the synchronization signal of said current frame image data specifically comprises: a step of determining the output start time of each local dimming sub-data according to the synchronization signal of said current frame image data; and a step of outputting said local dimming sub-data at the output start time of said local dimming sub-data, wherein said current frame local dimming data includes a plurality of said local dimming sub-data, and said output start time of said local dimming sub-data is later than the output start time of said pixel data corresponding to said local dimming sub-data. Claim 2 delete Claim 3 In claim 1, prior to the step of outputting the current frame local dimming data according to the synchronization signal of the current frame image data, the method further comprises the step of performing filtering processing on the current frame local dimming data and caching the filtered current frame local dimming data; wherein the caching time is shorter than the time required to cache all data of the current frame local dimming data. Claim 4 In claim 3, the step of processing the current frame image data to obtain current frame local dimming data, performing filtering processing on the current frame local dimming data, and caching the filtered current frame local dimming data specifically comprises: a step of inputting the current frame image data into an extraction circuit to obtain the current frame local dimming data output from the extraction circuit; a step of inputting the current frame local dimming data into a filtering circuit to obtain filtered current frame local dimming data output from the filtering circuit; and a step of inputting the filtered current frame local dimming data into a caching circuit to obtain the current frame local dimming data output from the caching circuit. Claim 5 In claim 1, after the step of outputting the current frame local dimming data according to the synchronization signal of the current frame image data, the method further comprises: a step of controlling the backlight unit to be disconnected from the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data do not overlap; and a step of controlling the backlight unit to be connected to the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data overlap, and driving the backlight unit according to the current frame local dimming data. Claim 6 In claim 5, the step of controlling the backlight unit to be disconnected from the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data do not overlap specifically includes: the step of controlling the backlight unit to be disconnected from the power terminal at the start of the output of the current frame image data; correspondingly, the step of controlling the backlight unit to be connected to the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data overlap, and the step of driving the backlight unit according to the current frame local dimming data specifically includes: the step of controlling the backlight unit to be connected to the power terminal at the start of the output of the current frame local dimming data. Claim 7 In claim 5, the step of controlling the backlight unit to be disconnected from the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data do not overlap specifically includes: the step of controlling the backlight unit to be disconnected from the power terminal at the start time of output of the current frame image data; correspondingly, the step of controlling the backlight unit to be connected to the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data overlap, and driving the backlight unit according to the current frame local dimming data specifically includes: the step of controlling the backlight unit to be disconnected from the power terminal and, after a delay time has elapsed, controlling the backlight unit to be connected to the power terminal; the delay time is the output delay time between the start time of output of the current frame local dimming data and the start time of output of the current frame image data. Claim 8 In claim 5, the step of controlling a backlight unit to connect to a power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data overlap, and driving the backlight unit according to the current frame local dimming data specifically includes: a step of controlling the backlight unit to connect to the power terminal at the start of the output of the current frame local dimming data; correspondingly, the step of controlling the backlight unit to be disconnected from the power terminal during a time period in which the output time period of the current frame local dimming data and the output time period of the current frame image data do not overlap specifically includes: a step of controlling the backlight unit to connect to the power terminal, and controlling the backlight unit to be disconnected from the power terminal after the overlap time has elapsed; and the overlap time is the time in which the output time period of the current frame local dimming data and the output time period of the current frame image data overlap. Claim 9 A controller comprising a processor and a memory connected to the processor in communication; wherein the memory stores computer execution instructions; and wherein the processor executes the computer execution instructions stored in the memory to implement the method according to claim 1. Claim 10 A display device comprising a backlight unit, a source driver, a liquid crystal panel, and a controller according to claim 9.

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