Partition backlight control method, device and system and storage medium

Abstract

The embodiment of the invention discloses a partition backlight control method, device and system and a storage medium. The partition backlight control method comprises the steps that touch coordinates corresponding to handwriting operation are received; according to the touch coordinate and arrangement information of a plurality of backlight partitions, determining at least one target partition corresponding to the handwriting operation, each backlight partition providing backlight for a corresponding display area in a display screen; the target subarea is refreshed according to the backlight value corresponding to the target subarea, backlight subareas except the target subarea are refreshed according to a preset backlight refreshing rule and the backlight value corresponding to each backlight subarea except the target subarea, and the backlight value corresponding to each backlight subarea is determined according to the display content of the display screen. By the adoption of the method, the technical problem that when a user carries out handwriting operation on a display screen, time delay is generated due to partition backlight frame-by-frame refreshing, and backlight partition refreshing is obviously delayed than handwriting content display in the prior art can be solved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of zoned backlight technology, and in particular, to a zoned backlight control method, device, system and storage medium. Background Art

[0002] Backlight is a form of lighting in the electronics industry. Zoned backlight is a way to implement backlight. Zoned backlight means dividing the backlighting LED (Light-Emitting Diode) into multiple zones. Each zone can be independently controlled to more finely control the brightness of the backlight zone, thereby making the brightness and darkness of the displayed image more distinct.

[0003] When imaging on a display screen with a partitioned backlight, the brightness of the LED lights in each backlight partition is determined according to the display content of the display screen. At this time, the LED lights in each backlight partition need to be refreshed and lit frame by frame, that is, for each frame of displayed content, the LED lights in each backlight partition need to be adjusted to the corresponding brightness. In the related art, when a user performs handwriting operations on a display screen with a partitioned backlight, there will be a delay when each backlight partition is refreshed and lit frame by frame. If the handwriting operation moves at a fast speed, the backlight will follow the handwriting content, that is, the handwriting content is displayed in front and the partition backlight is refreshed later, which makes the user's handwriting experience poor. Summary of the invention

[0004] The embodiments of the present application provide a partition backlight control method, device, system and storage medium to solve the technical problem in the related art that when a user performs handwriting operations on a display screen, the partition backlight refresh causes a delay frame by frame, causing the backlight partition refresh to be significantly delayed behind the display of the handwritten content.

[0005] In a first aspect, an embodiment of the present application provides a partition backlight control method, the method comprising:

[0006] Receive the touch coordinates corresponding to the handwriting operation;

[0007] Determine a target partition corresponding to the handwriting operation according to the touch coordinates and arrangement information of a plurality of backlight partitions, each of the backlight partitions providing backlight to a corresponding display area in the display screen, and there is at least one target partition;

[0008] Refresh the target partition according to the backlight value corresponding to the target partition, and refresh the backlight partitions except the target partition according to the preset backlight refresh rule and the backlight value corresponding to each backlight partition except the target partition, and the backlight value corresponding to each backlight partition is determined according to the display content of the display screen.

[0009] In a second aspect, an embodiment of the present application further provides a partition backlight control device, the device comprising:

[0010] A first receiving unit, used for receiving touch coordinates corresponding to a handwriting operation;

[0011] a target determination unit, configured to determine a target partition corresponding to the handwriting operation according to the touch coordinates and arrangement information of a plurality of backlight partitions, each of the backlight partitions providing backlight to a corresponding display area in the display screen, and there is at least one target partition;

[0012] A first refresh unit is used to refresh the target partition according to the backlight value corresponding to the target partition, and to refresh the backlight partitions other than the target partition according to a preset backlight refresh rule and the backlight value corresponding to each backlight partition except the target partition, and the backlight value corresponding to each backlight partition is determined according to the display content of the display screen.

[0013] In a third aspect, an embodiment of the present application further provides a partitioned backlight control system, the system comprising: one or more processors, a memory, and a plurality of backlight partitions;

[0014] The backlight partition is used to provide backlight to the corresponding display area in the display screen;

[0015] The memory is used to store one or more programs;

[0016] When the one or more programs are executed by the one or more processors, the one or more processors implement the partition backlight control method as described in the first aspect.

[0017] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the partition backlight control method as described in the first aspect.

[0018] In one embodiment of the present application, the touch coordinates corresponding to the handwriting operation are received by the partition backlight control system, the target partition corresponding to the handwriting operation is determined according to the touch coordinates and the arrangement information of multiple backlight partitions, the target partition is refreshed based on the backlight value of the target partition, and the other backlight partitions except the target partition are continuously refreshed according to the original backlight refresh rules. This technical means solves the technical problem in the related art that when the user performs handwriting operation on the display screen, the frame-by-frame refresh of the partition backlight causes a delay, which makes the backlight partition refresh significantly delayed from the display of the handwritten content. Through the touch coordinates of the handwriting operation, the target partition that provides backlight for the handwritten content can be determined without waiting for a frame of image corresponding to the display screen containing the handwritten content, and then the target partition is refreshed in combination with the backlight value corresponding to the target partition. When refreshing, the backlight corresponding to the target partition corresponding to the handwriting operation can be refreshed first, avoiding the phenomenon that the handwritten content is displayed first and the backlight follows, thereby improving the user's handwriting experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the transmission flow when the partition backlight control system in the related art processes an image;

[0020] Figure 2 A schematic diagram of the structure of a display device provided in one embodiment of the present application;

[0021] Figure 3 A flowchart of a partition backlight control method provided by an embodiment of the present application;

[0022] Figure 4 A first schematic diagram of a partition backlight provided for an embodiment of the present application

[0023] Figure 5 A flowchart of another partition backlight control method provided by an embodiment of the present application;

[0024] Figure 6 A second schematic diagram of a partition backlight provided by an embodiment of the present application;

[0025] Figure 7 A third schematic diagram of a partition backlight provided by an embodiment of the present application;

[0026] Figure 8 A fourth schematic diagram of a partition backlight provided by an embodiment of the present application;

[0027] Fig. 9 A fifth schematic diagram of a partition backlight provided by an embodiment of the present application;

[0028] Fig.10 A flowchart of another partition backlight control method provided by an embodiment of the present application;

[0029] Fig.11 A sixth schematic diagram of a partition backlight provided by an embodiment of the present application;

[0030] Fig.12 A schematic diagram of the structure of a partition backlight control device provided by an embodiment of the present application;

[0031] Fig.13 A schematic structural diagram of a partition backlight control system provided for one embodiment of the present application. DETAILED DESCRIPTION

[0032] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only the parts related to the present application, rather than all structures, are shown in the accompanying drawings.

[0033] Generally speaking, in a zoned backlight scenario, each zone providing backlight (i.e., the area of ​​the back panel LED light) contains multiple LED lights, and the number of LED lights contained in each zone is equal. For example, each zone is composed of 8, 9, or other number of LED lights. Currently, each zone providing backlight is recorded as a backlight zone.

[0034] Each backlight partition provides backlight to a corresponding display area in the display screen, and each display area constitutes a complete display area of ​​the display screen. The sizes of each display area are generally the same and the shape of each display area is usually rectangular.

[0035] Each backlight partition is controlled by a partition backlight control system. The partition backlight control system may include one or more processors. The processor may be a microcontroller unit (MCU) or a field programmable gate array (FPGA) or other processors with data processing functions. The partition backlight control system may also include one or more memories. It is understood that when the processor has a storage function, the processor may also be used as a memory, that is, the processor and the memory are integrated in one physical entity. The memory at least stores a program for execution by the processor, so that when the processor executes the program, the various functions of the partition backlight control system can be realized.

[0036] During the operation of the partition backlight control system, the brightness of the LED lights in each backlight partition can be controlled when they are lit, so that the partition backlight light type of each backlight partition is consistent with the shape of the display content of the corresponding frame each time it is refreshed.

[0037] The brightness of the LED lamp when it is on can also be understood as the backlight brightness of the backlight partition. Generally speaking, the brightness of each LED lamp in a backlight partition is consistent. The backlight brightness can be expressed in binary. For example, the partition backlight control system uses 10 bits of binary to express the backlight brightness. Then, the maximum backlight brightness can reach 1023, that is, the backlight brightness of each backlight partition has a total of 1024 brightness levels.

[0038] The partition backlight control system can independently control the backlight brightness of each backlight partition. In this case, the backlight brightness of different backlight partitions can be different. The backlight pattern composed of different backlight brightness of each backlight partition can be recorded as a partition backlight type. It can be understood that when the backlight brightness of the backlight partition changes, the partition backlight type also changes.

[0039] The backlight brightness used by each backlight partition is generally determined according to the content displayed on the display screen. Specifically, the partition backlight control system receives a frame of content displayed on the display screen, and each frame of content is received frame by frame by the partition backlight control system in the form of an image. Afterwards, the partition backlight control system determines the backlight brightness of each backlight partition based on the currently received image, wherein the backlight brightness of the backlight partition corresponding to the brighter area in the image is higher, and the backlight brightness of the backlight partition corresponding to the darker area in the image is lower. At this time, the partition backlight type can be obtained based on the backlight brightness of each backlight partition. It can be understood that determining the backlight brightness of each backlight partition based on the currently received image is a technical means that has been implemented and is not described at present.

[0040] After the partition backlight control system determines the backlight brightness of each backlight partition, the backlight brightness of each backlight partition can be transmitted to the processor that controls the lighting of the backlight partition (i.e., the LED lights in the partition are lit) and extinguished (i.e., the LED lights in the partition are extinguished). Usually, one processor can control one backlight partition or multiple backlight partitions to light up or extinguish. Moreover, when the processor controls the lighting of the backlight partition, it specifically controls the lighting of the backlight partition according to the backlight brightness determined by the partition backlight control system, so that the backlight provided by the backlight partition has the corresponding backlight brightness. When the backlight partition is lit once according to the corresponding backlight brightness, it can be considered that the backlight partition is refreshed once. When all backlight partitions are refreshed once according to the corresponding backlight brightness, it can be considered that the backlight is refreshed once based on the displayed content. In the related art, each backlight partition is usually refreshed at a uniform frequency. It can be understood that the processor that controls the lighting and extinguishing of each backlight partition can also be used as a processor set in the partition backlight control system.

[0041] It should be noted that when each backlight partition is controlled to light up according to the partition backlight type, when the display screen displays the image, there may be a deviation between the actual display effect of the image and the display effect that the image should have. In order to avoid this deviation, in the related art, in addition to determining the backlight brightness of each backlight partition, the partition backlight control system also needs to process the image, wherein the processing process can also be considered as a brightness compensation process for the image. The display screen displays the compensated image. At this time, after the partition backlight control system provides backlight based on the partition backlight type, the display effect presented by the darker areas and brighter areas in the image is basically consistent with the display effect that the image should have, that is, the display effect that the image should have is achieved.

[0042] Figure 1 This is a schematic diagram of the transmission flow of the partition backlight control system in the related art when processing an image. Figure 1 , the partition backlight control system receives the image displayed on the display screen ( Figure 1 After the image is obtained (recorded as the original image in the image), it is necessary to perform brightness compensation processing on the image, and determine the partition backlight type (that is, determine the backlight brightness for the backlight partition), and the pattern of the partition backlight type is similar or identical to the position and shape of the pattern in the image. At this time, when the partition backlight control system controls the refresh of each backlight partition based on the frame-by-frame image, there may be a time delay. The delay mainly includes two parts: one is the time consumed when the partition backlight control system calculates the backlight brightness of each backlight partition, and the time to process the image and display the processed image on the display screen (that is, fill the pixels of the image with each pixel point). Both times may be greater than the actual display time of a frame of image. The second is the time to control each backlight partition to display according to the partition backlight type, which includes the time required to transmit the backlight brightness of each backlight partition to the processor that controls the lighting of the backlight partition, and the time required for all backlight partitions to be refreshed when the processor controls the corresponding backlight partition to be refreshed based on the backlight brightness. Among them, when all backlight partitions are refreshed, all backlight partitions are lit according to the partition backlight type, and all backlight partitions need to be refreshed once for each frame of image displayed.

[0043] Based on the above time delay, the user's handwriting experience will be poor when handwriting in a display screen using a partitioned backlight. Specifically, when a user writes by hand on the display screen, the display screen should display the corresponding handwritten content in the handwriting position in a timely manner according to the user's handwriting operation. However, since there is a time delay when each backlight partition is refreshed frame by frame, when the user's handwriting speed is fast or the amplitude is large, the partition backlight control system may still be processing data, resulting in the phenomenon of handwriting in front and backlight following behind. For example, when a user writes a trajectory, the backlight brightness corresponding to the area through which the trajectory passes should be refreshed in combination with the handwritten content. However, due to the time delay, the corresponding backlight brightness may be refreshed after the user has finished writing in the area, affecting the display effect of the handwritten content and making the user's handwriting experience poor.

[0044] In summary, the embodiments of the present application provide a partitioned backlight control method, which can speed up the refresh speed of the corresponding backlight partition based on the position of the handwriting when the user is writing, so as to avoid the technical problem that the corresponding backlight partition is not refreshed when the handwritten content is displayed due to the delay caused by the frame-by-frame refresh of the backlight partition.

[0045] Currently, the partition backlight control method can be executed by a partition backlight control system, and the partition backlight control system can be composed of one physical entity or multiple physical entities. Currently, the partition backlight control system can refer to the partition backlight control system in the aforementioned related technology. In the embodiment of the present application, in addition to calculating the backlight brightness of each backlight partition, the processor of the partition backlight control system also executes the partition backlight control method provided in the embodiment of the present application.

[0046] Currently, the partitioned backlight control system also includes each backlight partition providing backlight and a processor controlling each backlight partition to refresh, wherein each backlight partition includes a plurality of LEDs of the same number.

[0047] The partition backlight control system is installed in a display device. A display device refers to a device having one or more display screens. For example, a display device may be a television, an interactive tablet, or a commercial display screen.

[0048] The partitioned backlight in the display device may be divided into dozens of partitions, hundreds of partitions, or two thousand partitions, etc., which are not limited in the embodiment. The type of display screen served by the partitioned backlight is not currently limited.

[0049] In one embodiment, the display screen in the display device also has a touch function. In this case, the display screen can also be recorded as a touch display screen. The touch display screen includes a display component, a touch component and a backlight component. The display component refers to a screen used to display a picture. The touch component is arranged at the front end of the display component or on the display component, and is used to collect touch-related data generated by the user's touch operation and report it to the display device for processing. The backlight component is used to provide a backlight light source, and the backlight component adopts a partition backlight, which includes the aforementioned partition backlight control system.

[0050] Currently, reference Figure 2 During the operation of the display device, the systems involved include at least a main system 11, a touch control system 12 and a partition backlight control system 13.

[0051] Among them, the main system 11 can be a system-on-chip (SoC) system or a PC (Personal Computer) system. The main system 11 integrates a processor, memory, etc. used when the display device is running, and it can be considered as a system used when the display device is running. The main system 11 is installed with at least one computer operating system for the display device, such as Windows system, Android system, Linux system or Apple operating system. On this basis, the main system 11 is also installed with at least one application software (also can be recorded as an application program, APP, etc.), which can be an application software that comes with the computer operating system, or an application software downloaded from a third-party device or server. When the application software is running, the corresponding function can be realized. For example, when the application software is a whiteboard writing software, after the display device runs the application software, the user can write in the application software. At present, the content displayed on the display screen is determined by the main system 11.

[0052] The touch control system 12 is a physical entity of a touch component, and the touch control system 12 may be an infrared touch control system, a capacitive touch control system, and / or an electromagnetic touch control system, etc. The touch control system 12 includes at least a component for receiving or sending a signal related to a touch operation and a processor (such as an MCU, etc.). For example, the component for receiving or sending a signal related to a touch operation in an infrared touch control system may be an infrared transmitter for generating an infrared signal and an infrared receiver for receiving an infrared signal. The component for receiving or sending a signal related to a touch operation in a capacitive touch control system may be a capacitor forming a receiving electrode or a transmitting electrode. In an embodiment, the touch control system 12 may collect touch-related data generated by a user's touch operation and report it to the main system 11. For example, when the touch control system 12 detects a handwriting operation, it determines the touch position and reports the touch position to the main system 11. For another example, when the touch control system 12 detects a handwriting operation, it reports the relevant signal (such as the energy of the infrared light received by the infrared receiver or the capacitance value, etc.) to the main system 11, and the main system 11 determines the touch position. The communication method between the touch control system 12 and the main system 11 is not limited at present. It is understandable that during the application of the touch control system 11, the user can perform touch operations through fingers or a stylus (also known as a smart pen, a writing pen, etc.).

[0053] The partition backlight control system 13 may refer to the above-mentioned related contents. The main system 11 may also communicate with the partition backlight control system 13. For example, the main system 11 sends a frame of image currently displayed to the partition backlight control system 13, so that the partition backlight control system 13 performs image processing based on the image and determines the partition backlight type. For another example, the main system 11 sends the data required to execute the partition backlight control method to the partition backlight control system 13.

[0054] It should be noted that the connection method between the above-mentioned systems is not currently limited, and the circuit structure of the peripheral circuit included in each system is currently limited.

[0055] After the above systems cooperate with each other, the zoned backlight control system can execute the zoned backlight control method. Figure 3 A flowchart of a partition backlight control method provided by an embodiment of the present application, refer to Figure 3 The partition backlight control method includes steps 210 to 230:

[0056] Step 210: Receive touch coordinates corresponding to the handwriting operation.

[0057] In the embodiment, the touch operation issued by the user in the display screen is divided into two categories, one is an editing operation and the other is a control operation. Among them, the editing operation refers to the operation of the user editing the display content in the touch display screen using the partition backlight. For example, the editing operation can realize the addition of display content, such as writing, drawing, drawing tables, inserting graphics or inserting three-dimensional models, etc. The editing operation can also realize deletion, movement, modification of display content, etc. The control operation can be understood as an operation to control at least one function of the display device, such as turning on or off a function (such as turning on or off a certain application software, turning on or off a function currently running in the application software), etc. At present, the editing operation of drawing a trajectory during writing or drawing is recorded as a handwriting operation. Correspondingly, the handwritten content obtained based on the handwriting operation will be displayed on the display screen. At present, the handwritten content can be considered as the track points that constitute the track. It can be understood that a line (currently a track) is composed of multiple points (currently track points). During the user's handwriting, the corresponding track points are drawn based on the continuous handwriting position, and the handwritten track can be obtained. In practical applications, handwriting operations can also be other editing operations, such as inserting graphics, moving tracks or graphics, etc., which can all be considered as handwriting operations.

[0058] Touch coordinates refer to the touch position of the detected handwriting operation in the touch display screen. Touch coordinates are two-dimensional coordinates. The method for determining touch coordinates can adopt an existing method and is not described separately at present. In one embodiment, the same handwriting operation can obtain one or more touch coordinates at the same sampling time. For example, when a user writes with a finger, the finger has a certain contact area when it contacts the display screen. At this time, all touch coordinates contained in the contact area can be used as the touch coordinates obtained by the handwriting operation at the sampling time, or a touch coordinate is obtained based on the contact area and used as the touch coordinate obtained by the handwriting operation at the sampling time. In one embodiment, a handwriting operation is described as obtaining a touch coordinate at a sampling time. It can be understood that if the touch display screen receives multiple handwriting operations at the same time, then each handwriting operation has a corresponding touch coordinate.

[0059] The touch coordinates can be determined by the touch control system and reported to the main system, and the touch coordinates can also be determined by the main system, that is, no matter which system determines the touch coordinates, the touch coordinates are ultimately obtained by the main system. In one embodiment, after the main system obtains the touch coordinates, it also sends the touch coordinates to the partition backlight control system, that is, the receiving of touch coordinates mentioned in this step refers to the receiving of touch coordinates by the partition backlight control system. It can be understood that during the continuous handwriting operation, the main system continues to obtain real-time touch coordinates and send them to the partition backlight control system.

[0060] It should be noted that the response process of touch coordinates in the main system is not currently limited. For example, after the application software in the main system for responding to handwriting operations receives the touch coordinates, the corresponding handwriting content is displayed at the position corresponding to the touch coordinates.

[0061] Optionally, before the main system sends the touch coordinates to the partition backlight control system, it can first determine whether the touch coordinates are touch coordinates of a handwriting operation. If it is determined that they are touch coordinates of a handwriting operation, the touch coordinates are sent to the partition backlight control system. If they are touch coordinates of a non-handwriting operation, the touch coordinates are not sent to the partition backlight control system. Among them, the implementation method of determining whether the touch coordinates are handwriting operations is not currently limited. For example, when the application software that responds in the main system receives the touch coordinates and determines the response method, it can be clarified whether the response method is a response method for a handwriting operation. Afterwards, when it is determined that it is a response method for a handwriting operation, the main system is notified to send the touch coordinates to the partition backlight control system.

[0062] In some cases, when the display device is connected to an external input device (such as a keyboard, mouse, etc.), the input device can also simulate fingers or a touch pen to issue a handwriting operation. At this time, the main system will also send the touch coordinates of the handwriting operation to the partition backlight control system.

[0063] Step 220: Determine a target partition corresponding to the handwriting operation according to the touch coordinates and arrangement information of the plurality of backlight partitions, each backlight partition provides backlight to a corresponding display area in the display screen, and there is at least one target partition.

[0064] Exemplarily, the partitioned backlight control system and the touch system use the same coordinate system, which is used to assist in determining the touch coordinates when applied to the touch system, and is used to assist in determining the display area corresponding to the backlight provided by each backlight partition in the display screen when applied to the partitioned backlight control system. In this case, the coordinate range of each backlight partition in the coordinate system can also be understood as the coordinate range of the display area in the display screen where the backlight is provided by the backlight partition.

[0065] Based on this, after receiving the touch coordinates, the partitioned backlight control system can directly use the touch coordinates without converting the touch coordinates. In one embodiment, after receiving the touch coordinates, the partitioned backlight control system can determine the backlight partition containing the touch coordinates based on the touch coordinates and the arrangement information of each backlight partition, that is, the touch coordinates are included in the coordinate range of the backlight partition. At this time, the backlight partition can be considered to be the backlight partition corresponding to the touch position of the handwriting operation. Currently, the backlight partition corresponding to the handwriting operation is recorded as the target partition. Generally speaking, each touch coordinate has a corresponding target partition.

[0066] Optionally, the arrangement information includes the total coordinate range of the total area composed of each backlight partition and the number of rows and columns of the backlight partition. Among them, the total coordinate range can also be understood as the coordinate range that can be touched by the user. The coordinate range, that is, the coordinate set, includes the coordinate range in the horizontal direction and the coordinate range in the vertical direction. For example, the horizontal direction is the X-axis, the vertical direction is the Y-axis, the horizontal coordinate range is 0-1000, and the vertical coordinate range is 0-800. Then, the coordinate range should include all coordinates between (0, 0) and (1000, 800).

[0067] The number of rows and columns of the backlight partitions includes the number of backlight partitions in the horizontal direction (ie, the number of columns of the backlight partitions) and the number of backlight partitions in the vertical direction (ie, the number of rows of the backlight partitions). Figure 4 A schematic diagram of a partition backlight structure provided in an embodiment of the present application, based on Figure 4 The partitioned backlight structure shown has a row and column number including 4 backlight partitions in the horizontal direction and 3 backlight partitions in the vertical direction.

[0068] The total coordinate range and the number of rows and columns of the backlight partitions can be pre-stored in the partition backlight control system for use. In one embodiment, the way in which the partition backlight control system determines the target partition based on the total coordinate range, the number of rows and columns and the touch coordinates is currently not limited. For example, based on the total coordinate range and the number of rows and columns, the coordinate range corresponding to each backlight partition is determined. Afterwards, the backlight partition whose coordinate range contains the touch coordinates is determined, and the determined backlight partition is used as the target partition. For another example, based on the coordinates of the touch coordinates in the horizontal direction (i.e., the coordinates of the X-axis), the total coordinate range of the total area composed of the backlight partitions in the horizontal direction, and the number of backlight partitions in the horizontal direction, it is determined which backlight partition the touch coordinates are located in the horizontal direction. Based on the same method, it is determined which backlight partition the touch coordinates are located in the vertical direction, and then based on the backlight partitions in the horizontal direction of the touch coordinates and the backlight partitions in the vertical direction, the target partition is determined. For example, the touch coordinates are (320, 600), the total coordinate range in the horizontal direction is 0-1000, and the number of backlight partitions in the horizontal direction is 4. Then, substitute the formula X÷(K÷R), where X is the coordinate value of the touch coordinates on the X axis, which is currently 320, K is the maximum value of the total coordinate range in the horizontal direction, which is currently 1000, and R is the number of partitions in the horizontal direction, which is currently 4. The result obtained after substitution is 1.28, which is rounded up to 2, which means that the touch coordinates are located in the second column of backlight partitions in the horizontal direction. Similarly, the total coordinate range in the vertical direction is 0-800, and the number of partitions in the vertical direction is 3. Then, substitute the formula Y÷(M÷C), where Y is the coordinate value of the touch coordinates on the Y axis, which is currently 600, M is the maximum value of the total coordinate range in the vertical direction, which is currently 800, and C is the number of partitions in the vertical direction, which is currently 3. The result obtained after substitution is 2.25, which is rounded up to 3, which means that the touch coordinates are located in the third row of backlight partitions in the vertical direction. At this time, determine the backlight partition where the intersection of the second column of backlight partitions in the horizontal direction and the third row of backlight partitions in the vertical direction is located as the target partition. Alternatively, determine the partition number of the target partition based on the second column of backlight partitions and the third row of backlight partitions, and then determine the target partition by the partition number. Among them, each backlight partition has a corresponding partition number, and the partition number is unique. The partition backlight control system pre-stores each partition number and the corresponding backlight partition. The numbering rules of the partition number are not currently limited. For example, the partition number corresponding to the partition in the upper left corner is 1. After that, the partition numbers of each backlight partition are set in order from left to right and from top to bottom. For example, refer to Figure 4, the partition numbers are 1-12, and the partition numbers corresponding to each backlight partition increase in order from left to right and from top to bottom. The partition backlight control system determines the partition number corresponding to the target partition according to the number of rows and columns to which the target partition belongs. Take the partition numbers of each backlight partition as an example for description, at this time, the partition backlight control system can use the formula K=R×(Y'-1)+X' to obtain the partition number of the target partition. Among them, K represents the partition number, R represents the number of backlight partitions in the horizontal direction, Y' represents the row of backlight partitions in the vertical direction (that is, the calculation result of Y÷(M÷C)), and X' represents the column of backlight partitions in the horizontal direction (that is, the calculation result of X÷(K÷R)). After obtaining the partition number according to this formula, the backlight partition corresponding to the partition number can be determined as the target partition. For example, the target partition is the second column partition in the horizontal direction and the third row partition in the vertical direction. The number of backlight partitions in the horizontal direction is 4, and the number of backlight partitions in the vertical direction is 3. At this time, substituting the above formula into the formula, we can get K=4×(3-1)+2=10, that is, the partition number of the target partition is 10. At this time, the partition backlight control system will use the backlight partition with partition number 10 as the target partition.

[0069] Optionally, the arrangement information may also be the coordinate range of each backlight partition, wherein the method for determining the coordinate range of each backlight partition may refer to the above content. In this case, the partitioned backlight control system pre-stores the coordinate range of each backlight partition, and after receiving the touch coordinates, the target partition may be determined based on the coordinate range of each backlight partition and the touch coordinates.

[0070] It should be noted that in the embodiment, the shape of each backlight partition is a rectangle, that is, each backlight partition can provide backlight for the corresponding rectangular display area in the touch display screen. In practical applications, each backlight partition can also adopt other shapes. In this case, when determining the target partition, it is also necessary to combine the specific shape of the backlight partition, determine the coordinate range occupied by each backlight partition, and then determine the target partition in combination with the touch coordinates.

[0071] Step 230, refresh the target partition according to the backlight value corresponding to the target partition, and refresh the backlight partitions except the target partition according to the preset backlight refresh rule and the backlight value corresponding to each backlight partition except the target partition. The backlight value corresponding to each backlight partition is determined according to the display content of the display screen.

[0072] In one embodiment, after determining the target partition, the partition backlight control system controls the target partition to be refreshed first, that is, the target partition is refreshed first regardless of whether it is the turn of the target partition to be refreshed.

[0073] Optionally, when refreshing the target partition, the partition backlight control system controls the target partition to refresh based on the currently used partition backlight type, which can also be understood as refreshing the target partition according to the backlight value (i.e., backlight brightness) that the target partition should currently provide, so that the target partition provides the corresponding backlight brightness. Currently, the backlight brightness that the target partition should currently provide is recorded as the backlight value corresponding to the target partition.

[0074] Among them, the backlight value corresponding to the target partition can be determined based on a frame of image currently received, and the determination process can refer to the current existing backlight brightness determination process (i.e., the partition backlight type determination process). The backlight value corresponding to the target partition can also be adjusted in combination with the brightness of the handwritten content when it is displayed on the display screen, that is, based on the backlight brightness currently used by the target partition, the backlight brightness of the target partition is adjusted again in combination with the display brightness of the handwritten content, and then the partition backlight control system controls the target partition to refresh according to the adjusted backlight brightness of the target partition. At this time, the backlight brightness of other backlight partitions does not change.

[0075] Exemplarily, when the target partition is refreshed first, other backlight partitions are refreshed based on the backlight refresh rules. Among them, the backlight refresh rules are used to limit the refresh frequency when the partitioned backlight control system controls the refresh of each backlight partition and the refresh order between the backlight partitions. When each backlight partition is refreshed, it can be refreshed at the same time, refreshed one by one, or refreshed according to a certain number of partitions each time, and the embodiment does not limit this. The backlight refresh rules can be considered as the rules used by the partitioned backlight control system to control each backlight partition to refresh according to the prior art.

[0076] The partitioned backlight control system pre-stores backlight refresh rules. After that, after determining the partitioned backlight type (i.e., determining the backlight brightness corresponding to each backlight partition) based on a currently received frame of image, each backlight partition can be controlled to refresh according to the backlight refresh rules. In other words, the partitioned backlight control system gives priority to refreshing the currently determined target partition, and for other backlight partitions that are not target partitions, the partitioned backlight control system still controls the other backlight partitions to refresh according to the existing backlight refresh rules based on the backlight values ​​corresponding to the other backlight partitions. Among them, the backlight brightness used when refreshing other backlight partitions is related to the image received by the partitioned backlight control system and is not affected by the display brightness of the handwritten content.

[0077] For example, in the process of controlling each backlight partition to refresh according to the backlight refresh rule, the partition backlight control system receives the touch coordinates and determines the target partition based on the touch coordinates. At this time, after the partition backlight control system controls the backlight partition currently being refreshed to complete the refresh, it controls the target partition to refresh, and after the target partition is refreshed, it continues to control the remaining unrefreshed backlight partitions to refresh based on the backlight refresh rule. When controlling the remaining unrefreshed backlight partitions to refresh, if it is determined based on the backlight refresh rule that the target partition needs to be refreshed, the target partition can be skipped and no longer refreshed.

[0078] Optionally, if the partitioned backlight control system has already refreshed the target partition based on the backlight refresh rule and the backlight value corresponding to the current display content (the display content when the handwritten content is not displayed), the backlight value used for the next refresh of the target partition (i.e., the backlight value corresponding to the next frame of display content) has not yet been determined. Then, the partitioned backlight control system can control the target partition to refresh again. At this time, the backlight value of the target partition can be adjusted in combination with the current backlight value of the target partition and the display brightness of the handwritten content, and then the target partition can be refreshed according to the adjusted backlight value. Afterwards, after the partitioned backlight control system determines the backlight value to be used next time (i.e., the backlight value corresponding to the next frame of display content), it can control all backlight partitions to refresh according to the backlight refresh rule.

[0079] In one embodiment, in addition to controlling the target partition to refresh first, the target partition and other backlight partitions can also be controlled to refresh according to the backlight refresh rule. However, when refreshing, the backlight value corresponding to the target partition is determined in combination with the display brightness of the handwritten content. At this time, although the target partition is not refreshed first, since the backlight value used when refreshing the target partition is combined with the display brightness of the handwritten content, even if there is a delay in the partition backlight control system, it can be ensured that the backlight brightness of the latest refreshed target partition is suitable for the currently displayed handwritten content. Specifically, according to the implementation process of the prior art, the partition backlight control system determines the backlight value of each backlight partition based on a frame of image, that is, obtains the partition backlight type. If a handwriting operation occurs, then, after the handwritten content is displayed on the display screen, the partition backlight control system obtains a frame of image containing the handwritten content, and then obtains the backlight value of each backlight partition (suitable for the handwritten content), that is, obtains the partition backlight type, and then refreshes. According to the partition backlight control method provided in the aforementioned embodiment, the partition backlight control system does not need to wait for a frame image containing handwritten content, but directly obtains the touch coordinates. That is, when a handwriting operation occurs, the detected touch coordinates can be promptly notified to the partition backlight control system, so that the partition backlight control system can more quickly determine the target partition corresponding to the handwriting operation, and then execute the corresponding refresh strategy. Even if the frame image currently being used does not contain handwritten content (that is, the image containing handwritten content has not yet been transmitted to the partition backlight system), the backlight value used after the target partition is refreshed can be suitable for the handwritten content.

[0080] It should be noted that regardless of the refresh method adopted, the process of determining the target partition and the process of determining the corresponding backlight value of the target partition in combination with the display brightness of the handwritten content are two parallel lines with the process of determining the backlight value of each backlight partition in combination with a frame image of the display content according to the prior art, that is, the two are processed in parallel and do not respond to each other.

[0081] Optionally, when displaying handwritten content based on touch coordinates, the handwritten content should have a certain area on the display screen, which can be considered as the area of ​​the track point (i.e., the touch point). In this case, the handwritten content with a certain area may be located in multiple partitions. Then, when the partition backlight control system determines the target partition, in addition to determining the target partition containing the touch coordinates, other partitions containing the handwritten content can also be determined as target partitions. In this case, the number of target partitions can be one or more, and then the partition backlight control system can control all currently determined target partitions to refresh.

[0082] In the above, the touch coordinates corresponding to the handwriting operation are received by the partition backlight control system, and the target partition corresponding to the handwriting operation is determined according to the touch coordinates and the arrangement information of the partition backlight. Then, based on the backlight value corresponding to the target partition, the target partition is refreshed, and according to the original backlight refresh rule, the technical means of refreshing other partitions except the target partition solves the technical problem in the related art that when the user performs handwriting operation on the display screen, the delay is caused by the frame-by-frame refresh of the partition backlight, which makes the backlight partition refresh significantly delayed from the display of the handwritten content. Through the touch coordinates of the handwriting operation, the target partition providing backlight for the handwriting content can be quickly determined without waiting for a frame of image corresponding to the display screen containing the handwriting content, and then, combined with the backlight value corresponding to the target partition, the target partition is refreshed. When refreshing, the backlight corresponding to the target partition corresponding to the handwriting operation can be refreshed first, avoiding the phenomenon that the handwriting content is displayed first and the backlight follows later, or, when refreshing the target partition according to the backlight refresh rule, the target partition uses the backlight value suitable for the handwriting content, which also avoids the phenomenon that the handwriting content is displayed first and the backlight follows later, thereby improving the user's handwriting experience.

[0083] Figure 5 This is a flowchart of another partition backlight control method provided by an embodiment of the present application. This partition backlight control method is based on the aforementioned partition backlight control method and illustrates how to determine all target partitions covered by handwritten content. Figure 5 The partition backlight control method includes steps 310 to 330:

[0084] Step 310: Receive the touch coordinates corresponding to the handwriting operation and the size information of the handwriting content corresponding to the handwriting operation.

[0085] In one embodiment, the handwritten content refers to the track points (which can also be understood as touch points) drawn based on the handwriting operation. The track points have corresponding shapes, and the shape can also be considered as the shape corresponding to the handwritten content. Currently, the shape of the track points can be a circle, a square, or a rectangle. In practical applications, the track points can also be other shapes, such as a triangle, a hexagon, or other irregular shapes. At this time, for the convenience of calculation, it can also be considered that the rectangle or circle containing the track points is determined as the shape corresponding to the track points.

[0086] The size information of the handwritten content can also be understood as the size information of the trajectory point. Optionally, when the trajectory point is a square or a rectangle, the size information of the trajectory point can be the side length of the square or rectangle, and when the trajectory point is a circle, the size information of the trajectory point can be the radius of the circle. Optionally, when the shape of the trajectory point is a square or a circle, the size information of the trajectory point is the area of ​​the square or the circle, and when the shape of the trajectory point is a rectangle, the size information of the trajectory point can be the area of ​​the rectangle and the ratio of the length to the width. Among them, the area can also be understood as the display area, that is, the area obtained based on the coordinate system when the trajectory point is displayed on the display screen. In the aspect ratio, the long side is in the horizontal direction, and the wide side is in the vertical direction. The side length and radius can be understood as the length obtained based on the coordinate system when the trajectory point is displayed on the display screen.

[0087] It can be understood that when the trajectory point is other shapes, or the handwriting operation is used to operate objects of other shapes, the size information of the handwriting content can be understood as the area of ​​the rectangle containing other shapes and the ratio of the length to the width, or the area of ​​the circle containing other shapes, wherein the rectangle containing other shapes has two sides in the horizontal direction and two sides in the vertical direction.

[0088] The size information of the handwritten content is determined by the application software in the main system for responding to the handwriting operation. The method by which the application software determines the size information is not currently limited. For example, the shape and size (such as thickness) of the track point are pre-set in the application software, or the shape and size (such as thickness) of the track point are set by the user in the application software. After that, when the application software receives the touch coordinates of the handwriting operation, it can obtain the corresponding size information and send it to the partition backlight control system through the main system. At this time, the size information and touch coordinates can be sent at the same time.

[0089] Step 320: Obtain a target partition list according to the touch coordinates, the size information, and the arrangement information of the plurality of backlight partitions, wherein the target partition list includes at least one target partition, and the at least one target partition is used to provide backlight for the handwritten content.

[0090] Exemplarily, after receiving the touch coordinates and size information, the partition backlight control system can determine each backlight partition that provides backlight for the handwritten content when the display screen displays the handwritten content. Currently, the backlight partition that provides backlight for the handwritten content can be used as the target partition. In this case, the number of target partitions corresponding to one handwriting operation is one or more.

[0091] In one embodiment, the currently determined target partitions are recorded in a list. Currently, the list of recorded target partitions is recorded as a target partition list. Optionally, each touch coordinate has a corresponding target partition list, or multiple touch coordinates received at the same time can share a target partition list.

[0092] The target partition list has no current limitation on the way of recording the target partition. For example, the target partition list records the target partition by recording the partition number of the target partition. When there are multiple target partitions, the order of arranging the multiple target partitions in the target partition list is not currently limited. For example, the target partitions in the target partition list are arranged in order of partition numbers from small to large, from large to small, or in order of the determination time of the target partitions. In one embodiment, the partition backlight control system can add the target partition to the target partition list each time it obtains a target partition.

[0093] In an optional manner, when the zoned backlight control system determines the target zone, it can determine the coordinate range corresponding to the handwritten content when it is displayed based on the touch coordinates and size information. Generally speaking, the touch coordinates are the coordinates of the center point of the graphic corresponding to the handwritten content. The coordinate range can be obtained by performing geometric calculations on the touch coordinates and size information. After determining the coordinate range of the handwritten content, each target zone containing the coordinate range of the handwritten content can be determined based on the arrangement information.

[0094] Another optional method is to first determine the target partition containing the touch coordinates based on the touch coordinates and the arrangement information. Then, calculate the distance between the touch coordinates and the four sides of the target partition. In addition, calculate the distance between the touch coordinates and the side of the graphic corresponding to the handwritten content in combination with the size information. Based on the above distances, it is possible to determine whether the target partition contains all the handwritten content. If it does not contain all the handwritten content, each target partition containing the handwritten content is determined in combination with the size of each partition and the distance between the touch coordinates and the side of the graphic corresponding to the handwritten content.

[0095] In one embodiment, the method of determining all target partitions by calculating the distance is used as an example for description. In this case, step 320 may include steps 321 to 323:

[0096] Step 321 : Determine a backlight partition containing the touch coordinates according to arrangement information of a plurality of backlight partitions, and add the backlight partition containing the touch coordinates as a target partition in a target partition list.

[0097] In the embodiment, the sizes of the backlight partitions are the same and the shapes of the backlight partitions are all rectangular. In this case, each backlight partition has four edges, two of which are horizontal and the other two are vertical.

[0098] Currently, the implementation method of determining the target partition containing the touch coordinates according to the arrangement information may refer to the related description of determining the target partition in step 220 .

[0099] Afterwards, the target partition containing the touch coordinates is added to the corresponding target partition list.

[0100] Step 322: determine the first distance between each edge in the target partition and the touch coordinates, and determine the second distance between the touch coordinates and the edge of the handwritten content according to the size information.

[0101] Exemplarily, when the shape of the backlight partition is a rectangle, each coordinate point corresponding to the horizontal side has the same value on the Y axis of the coordinate system, and each coordinate point corresponding to the vertical side has the same value on the X axis of the coordinate system. Among them, the coordinate value of each coordinate point in the horizontal side of the target partition on the Y axis and the coordinate value of each coordinate point in the vertical side on the X axis can be determined according to the arrangement information. For example, according to the total coordinate range and the number of rows and columns, the coordinate range corresponding to each backlight partition can be determined, and then based on the coordinate range corresponding to the backlight partition, the coordinate value of each coordinate point in the horizontal side on the Y axis and the coordinate value of each coordinate point in the vertical side on the X axis can be determined.

[0102] After determining the target partition containing the touch coordinates, the partition backlight control device calculates the distance from the touch coordinates to the four sides of the target partition. In the embodiment, the currently calculated distance is recorded as the first distance. At this time, there are four first distances between the touch coordinates and the target partition, and the four first distances correspond to the upper direction (i.e., the distance from the upper side of the target partition), the lower direction (i.e., the distance from the lower side of the target partition), the left direction (i.e., the distance from the left side of the target partition), and the right direction (i.e., the distance from the right side of the target partition).

[0103] When the first distance is the distance between the touch coordinates and an edge in the horizontal direction of the target partition, the first distance may correspond to the upward direction or the downward direction, and in this case, the first distance may be determined based on the difference between the coordinate values ​​of each coordinate point in the horizontal direction on the Y axis and the coordinate values ​​of the touch coordinates on the Y axis. When the first distance is the distance between the touch coordinates and an edge in the vertical direction of the target partition, the first distance may correspond to the left direction or the right direction, and in this case, the first distance may be determined based on the difference between the coordinate values ​​of each coordinate point in the vertical direction on the X axis and the coordinate values ​​of the touch coordinates on the X axis.

[0104] For example, refer to Figure 6, the coordinates (x, y) of the coordinate point P are the touch coordinates. The shape of the handwritten content 71 (i.e., the shape of the trajectory point) is a square. The four vertices of the target partition containing the coordinate point P are vertex A (x00, y00), vertex B (x01, y01), vertex C (x10, y10), and vertex D (x11, y11), wherein y00=y01, which is the coordinate value of the horizontal side located on the upper side (relative to the touch coordinates) of the target partition on the Y axis, x00=x10, which is the coordinate value of the vertical side located on the left side (relative to the touch coordinates) of the target partition on the X axis, x01=x11, which is the coordinate value of the vertical side located on the right side (relative to the touch coordinates) of the target partition on the X axis, and y10=y11, which is the coordinate value of the horizontal side located on the lower side (relative to the touch coordinates) of the target partition on the Y axis. Afterwards, the difference between y00 and y is calculated as the first distance from the touch coordinate to the upper side of the target partition (ie, the upper direction). Figure 6 The difference between x01 and x is calculated as the first distance from the touch coordinate to the right side of the target partition (i.e., the right direction). Figure 6 The difference between x and x00 is calculated as the first distance from the touch coordinate to the left side of the target partition (i.e., the left direction). Figure 6 The difference between y and y11 is calculated as the first distance from the touch coordinate to the lower side of the target partition (ie, the lower direction). Figure 6 It is recorded as distance d, d=y-y11. It should be noted that if the difference obtained when calculating the first distance is a negative number, then the absolute value of the negative number can be taken and used as the calculated first distance.

[0105] Exemplarily, the partition backlight control system pre-stores the shape of the handwritten content. After receiving the size information, the partition backlight control system can determine the distance from the center point of the handwritten content to the edge of the handwritten content based on the size information and the shape of the handwritten content. In an embodiment, the distance is recorded as the second distance. It can be understood that the center point of the handwritten content is the touch coordinate. Alternatively, when the main system sends the size information to the partition backlight control system, it also sends the shape of the handwritten content. After that, the partition backlight control system determines the second distance based on the size information and the shape of the handwritten content. Optionally, the shape corresponding to the handwritten content can be a circle, a square or a rectangle. Different shapes can use different shape numbers. The partition backlight control system can determine the shape of the handwritten content corresponding to the current touch coordinates based on the shape number.

[0106] When the handwritten content is a circle, the size information is the display area. In this case, the radius calculated based on the display area can be considered as the second distance. When the handwritten content is a square, the size information is the display area. In this case, the side length of the square is calculated based on the display area, and half of the side length can be considered as the second distance. When the handwritten content is a rectangle, the size information is the ratio of the display area to the length and width. The length of the long side and the width can be determined. Half of the length of the long side can be considered as the second distance from the touch coordinates to the wide side, and half of the wide side can be considered as the second distance from the touch coordinates to the long side.

[0107] It is understandable that in addition to calculating the second distance through size information, other methods can be used to obtain the second distance. For example, when the main system sends the display area, it also sends the coordinate range when the handwritten content is displayed. After that, the partition backlight control system can obtain the second distance based on the coordinate range and the touch coordinates.

[0108] Step 323: Determine other backlight partitions covered by the handwritten content according to the first distance, the second distance, and the length values ​​of each side in the backlight partition, and add the other covered backlight partitions as new target partitions in the target partition list.

[0109] Exemplarily, after the partition backlight control system obtains the first distance and the second distance, it compares the first distance and the second distance. Among them, when comparing, it is necessary to compare the second distance and the first distance in the same direction, that is, the first distance corresponding to the upper direction is compared with the second distance corresponding to the upper direction, and the first distance corresponding to the lower direction is compared with the second distance corresponding to the lower direction, and so on. It can be understood that when the shape of the handwritten content is a square or a circle, the second distance downward is the same for all parties. At this time, the second distances in different directions can also be ignored. When the shape of the handwritten content is a rectangle, the second distances corresponding to the upper and lower directions are equal, both are the distances from the touch coordinates to the wide side, and the second distances corresponding to the left and right directions are equal, both are the distances from the touch coordinates to the long side.

[0110] If the first distance is greater than or equal to the second distance, it means that the handwritten content in the direction corresponding to the first distance does not exceed the target partition. If the first distance is less than the second distance, it means that the handwritten content in the direction corresponding to the first distance exceeds the target partition, that is, the handwritten content in this direction is also covered on other backlight partitions.

[0111] If the handwritten content also covers other backlight partitions, then the number of backlight partitions covered by the handwritten content can be determined based on the first distance, the second distance and the length value of the edge in the corresponding direction in the backlight partition. It can be understood that when the first distance is the distance in the upper direction or the lower direction, it can be considered as the vertical distance from the touch coordinates to the upper side or the vertical distance from the touch coordinates to the lower side. At this time, the length value of the edge in the vertical direction of the backlight partition should be used to calculate with the first distance in the upper direction or the lower direction and the second distance to determine how many backlight partitions the second distance spans, that is, to determine how many backlight partitions the handwritten content covers in the upper direction or the lower direction. The same applies to other directions.

[0112] The calculation method for determining how many backlight partitions are covered is not currently limited. For example, taking the upper direction as an example, assuming that the first distance corresponding to the upper direction is a, the second distance is k, and the length of the vertical side in each backlight partition is n, when k>a, it indicates that the handwritten content exceeds the target partition in the upper direction. At this time, the first distance corresponding to the upper direction is added to the length of the edge in the vertical direction of the backlight partition and then compared with the second distance, that is, a+n and k are compared. If k≤a+n, it means that the second distance covers a backlight partition above the target partition. If the second distance is greater than the sum after addition, it means that the second distance crosses a backlight partition above the target partition. In this case, the sum is added to the length of the edge in the vertical direction of the backlight partition and then compared with the second distance, that is, a+2n and k are compared. If k≤a+2n, it means that the second distance also covers two backlight partitions above the target partition. If the second distance is greater than the sum after addition, it means that the second distance crosses two backlight partitions above the target partition. After that, the calculation is repeated to obtain how many backlight partitions the second distance specifically covers above the target partition. The same applies to other directions.

[0113] For another example, taking the upper direction as an example, after subtracting the second distance in the upper direction from the first distance, the distance value that the handwritten content exceeds the target partition in the upper direction can be obtained. Then, the integer obtained by dividing the distance value by the length value of the vertical side in the backlight partition can be understood as the specific number of backlight partitions covered by the second distance above the target partition. The same is true for other directions. In one embodiment, the calculation of the difference between the second distance and the first distance and the determination of the number of partitions covered based on the difference are described as an example. At this time, step 323 can specifically include steps 3231-3233:

[0114] Step 3231: Calculate the distance difference between the second distance and the first distance.

[0115] In one embodiment, the second distance in the same direction is subtracted from the first distance to obtain the corresponding distance difference. In this case, the four directions all have corresponding distance differences.

[0116] Step 3232: When the first distance corresponds to the horizontal edge in the target partition, the corresponding distance difference is divided by the length value of the vertical edge in the backlight partition and rounded to obtain the corresponding first partition quantity; when the first distance corresponds to the vertical edge in the target partition, the corresponding distance difference is divided by the length value of the horizontal edge in the backlight partition and rounded to obtain the corresponding second partition quantity.

[0117] When the first distance corresponds to the horizontal edge of the target partition, it indicates that the first distance corresponds to the upper direction or the lower direction. Based on the above content, it can be known that when the first distance corresponds to the upper direction or the lower direction, the length value of the vertical edge in the backlight partition should be used to determine how many backlight partitions the handwritten content covers in the corresponding direction. Similarly, when the first distance corresponds to the vertical edge of the target partition, it means that the first distance corresponds to the left direction or the right direction. At this time, the length value of the horizontal edge in the backlight partition should be used to determine how many backlight partitions the handwritten content covers in the corresponding direction.

[0118] Currently, the length values ​​of the horizontal edges in each backlight partition are all equal, and the length values ​​of the vertical edges are also all equal. The length value of the edge can also be understood as the length of the coordinate, which is determined according to the arrangement information of the partition backlight. For example, the total coordinate range of the partition backlight is (0, 0) to (1000, 800), the number of backlight partitions in the horizontal direction is 5, and the number of backlight partitions in the vertical direction is 4. Then, the length value of the horizontal edge is 1000 / 5=200, and the length value of the vertical edge is 800 / 4=200. After the partition backlight control system calculates the length value of the edge of each partition, the length value can be stored for direct use in this step. Alternatively, the four vertices of the target partition are used to determine the length value of the horizontal edge and the length value of the vertical edge. Figure 6 For example, the length of the horizontal side is recorded as m, m=x01-x00, and the length of the vertical side is recorded as n, n=y00-y01. If the value obtained after subtraction is a negative number, the absolute value is taken as the length of the side.

[0119] Each distance difference is divided by the length of the corresponding side. At this time, the distance difference in the upper direction and the distance difference in the lower direction are divided by the length of the side in the vertical direction, and the distance difference in the left direction and the distance difference in the right direction are divided by the length of the side in the horizontal direction. The result obtained by the division is rounded, that is, the integer part is retained. The integer part can be the number of backlight partitions covered by the handwritten content in the corresponding direction of the target partition, that is, the number of partitions. At present, when the first distance corresponds to the horizontal side of the target partition, the number of partitions obtained after the rounding operation is recorded as the first number of partitions. There are two first number of partitions, namely, the number of first partitions corresponding to the upper direction and the number of first partitions corresponding to the lower direction. Taking the number of first partitions corresponding to the upper direction as an example, it specifically represents the number of rows of the backlight partition covered by the handwritten content above the target partition. When the first distance corresponds to the vertical side of the target partition, the number of partitions obtained after the rounding operation is recorded as the second number of partitions. There are two second number of partitions, namely, the number of second partitions corresponding to the left direction and the number of second partitions corresponding to the right direction. Taking the number of second partitions corresponding to the left direction as an example, it specifically indicates the number of columns of the backlight partition covered by the handwritten content on the left side of the target partition.

[0120] It is understandable that there is a situation where the handwritten content does not exceed the target partition containing the touch coordinates in a certain direction. In this case, there is no need to calculate how many partitions the handwritten content covers in this direction. Based on this, in one embodiment, it also includes: when the first distance corresponds to the horizontal side of the target partition, if the second distance is greater than the first distance, the corresponding distance difference is divided by the length value of the vertical side in the backlight partition and rounded to obtain the corresponding number of first partitions. If the second distance is less than or equal to the first distance, the number of first partitions is determined to be zero. When the first distance corresponds to the vertical side of the target partition, if the second distance is greater than the first distance, the corresponding distance difference is divided by the length value of the horizontal side in the backlight partition and rounded to obtain the corresponding number of second partitions. If the second distance is less than or equal to the first distance, the number of second partitions is determined to be zero.

[0121] Exemplarily, compare the second distance and the first distance in the same direction. If the second distance is less than or equal to the first distance, it means that the handwritten content in the direction corresponding to the first distance does not exceed the target partition. If the first distance corresponds to the upper direction or the lower direction (that is, the first distance corresponds to the horizontal edge in the target partition), then the corresponding number of first partitions is zero, and there is no need to calculate the number of first partitions corresponding to the upper direction or the lower direction. If the first distance corresponds to the left direction or the right direction (that is, the first distance corresponds to the vertical edge in the target partition), then the corresponding number of second partitions is zero, and there is no need to calculate the number of second partitions corresponding to the left direction or the right direction. If the second distance is greater than the first distance, it is necessary to calculate the corresponding number of first partitions or the number of second partitions according to step 3232.

[0122] Optionally, when comparing the first distance and the second distance, the sizes of the two can be directly compared, or it can be determined whether the distance difference between the second distance and the first distance is greater than zero. If it is greater than zero, it means that the second distance is greater than the first distance, otherwise, it means that the second distance is less than or equal to the first distance.

[0123] It should be noted that currently, the first distance and the second distance need to be compared in all four directions, and the subsequent response logic is determined based on the comparison results, so as to obtain the corresponding four partition numbers. At this time, the number of partitions corresponding to some directions may be zero, while the number of partitions corresponding to some directions may not be zero.

[0124] For example, refer to Figure 7 , the shape of the handwritten content 72 is a circle, and the four first distances between the touch coordinates corresponding to the handwritten content 72 and the target partition 73 containing the touch coordinates are all greater than the second distances. Therefore, it can be determined that the target partition 73 completely contains the graphics of the handwritten content 72, that is, it is determined that there are no other target partitions. Therefore, step 330 can be executed. Figure 8 , the shape of the handwritten content 72 is circular, among the four first distances between the touch coordinates corresponding to the handwritten content 72 and the target partition 73 containing the touch coordinates, the first distance in the upper direction is smaller than the second distance, therefore, the difference between the second distance and the first distance can be divided by the length of the vertical side in the backlight partition and rounded to obtain the corresponding number of first partitions, the first distance in the left direction is smaller than the second distance, therefore, the difference between the second distance and the first distance can be divided by the length of the horizontal side in the backlight partition and rounded to obtain the corresponding number of second partitions. The first distance in the lower direction is larger than the second distance, therefore, it can be determined that the number of first partitions corresponding to the lower direction is zero, and the first distance in the right direction is larger than the second distance, therefore, it can be determined that the number of second partitions corresponding to the right direction is zero.

[0125] Below, in order to facilitate understanding of the method for determining the number of first partitions and the number of second partitions, the derivation process of the determination method is briefly described. Currently, the determination of the number of first partitions in the upward direction is taken as an example. Assume that the touch coordinates are the coordinates of point P, and the handwritten content occupies N backlight partitions above the target partition, that is, the number of first partitions is N. The first distance corresponding to the upward direction is a, the second distance is k, and the length value of the vertical side in each backlight partition is n.

[0126] Currently, if k≤a, it means that the upper boundary of the handwritten content does not cross the target partition, that is, N=0;

[0127] If k>a, it means that the upper boundary of the handwritten content crosses the target partition;

[0128] If k>a and k≤a+n, it means that the upper boundary of the handwritten content covers one backlight partition above the target partition, that is, N=1;

[0129] If k>a+n and k≤a+2n, it means that the upper boundary of the handwritten content covers 2 backlight partitions above the target partition, that is, N=2;

[0130] And so on.

[0131] At this time, it can be obtained that if k>a+(N-1)*n and k≤a+N*n, it means that the upper boundary of the handwritten content covers N backlight partitions above the target partition. At this time, N=1,2,3...... After transformation, it can be obtained that (ka) / n≤N<(ka) / n+1, N takes the integer part, at this time, N=1,2,3...... Based on the transformed content, it can be obtained that N=(ka) / n and N takes the integer part. That is, the technical means described in step 3232 is obtained.

[0132] Step 3233: Based on the number of each first partition and the number of each second partition, determine other backlight partitions covered by the handwritten content, and add the other covered backlight partitions as new target partitions in the target partition list.

[0133] For example, after obtaining the number of each first partition, it is possible to determine how many partitions the handwritten content covers in the vertical direction. For example, Fig. 9 , the handwritten content 74 is a rectangle, and the backlight partition 75 is the target partition containing the touch coordinates. The number of first partitions in the upper direction is 2, and the number of first partitions in the lower direction is 2. At this time, it can be determined that the handwritten content covers 2+2+1=5 backlight partitions in the vertical direction. Similarly, after obtaining the number of each second partition, it can be determined how many backlight partitions the handwritten content covers in the horizontal direction. For example, refer to Fig. 9, the handwritten content covers 1+1+1=3 backlight partitions in the horizontal direction. At this time, the total number of target partitions covered by the handwritten content is 5×3=15, and the 15 target partitions are arranged in 5 rows and 3 columns, and the target partition containing the touch coordinates is located in the center. Based on this arrangement, other target partitions can be determined.

[0134] Alternatively, the two first partition numbers and the two second partition numbers are combined in pairs, and then four combinations can be obtained. Then, new target partitions can be determined based on the four combinations. For example, refer to Fig. 9 , the number of the first partitions in the upward direction is 2, and the number of the second partitions in the right direction is 1. At this time, it can be determined that starting from the target partition containing the touch coordinates, a total of three rows of partitions are covered upward (including the target partition), and a total of two columns of partitions are covered to the right (including the target partition). Then, taking the target partition containing the touch coordinates as the target partition at the bottom left, a target partition with three rows and two columns can be obtained, that is, a total of 3×2=6 partitions can be used as target partitions, one of which is the target partition containing the touch coordinates, and five are newly determined target partitions. Under the other three combinations, each target partition can also be obtained in the above manner, and under different combinations, there may be repeated target partitions. At this time, deduplication can be performed to ensure that the new target partition finally obtained does not contain repeated target partitions.

[0135] After obtaining the new target partition, the new target partition can be added to the target partition list.

[0136] Step 330, refresh the target partition according to the backlight value corresponding to the target partition, and refresh the backlight partitions except the target partition according to the preset backlight refresh rule and the backlight value corresponding to each backlight partition except the target partition. The backlight value corresponding to each backlight partition is determined according to the display content of the display screen.

[0137] This step may refer to the relevant description of step 230, except that in this step, each target partition in the target partition list is refreshed at the same time. After refreshing, the target partition list may be cleared, and the corresponding target partition may be added to the target partition list based on the touch coordinates and arrangement information received again.

[0138] In the above, the touch coordinates corresponding to the handwriting operation and the size information of the handwritten content corresponding to the handwriting operation are received through the partition backlight control system. Then, according to the size information, the touch coordinates and the arrangement information of the partition backlight, all the target partitions that provide backlight for the handwritten content can be determined. Then, the target partition is refreshed based on the backlight value of the target partition, and the technical means of continuing to refresh other backlight partitions except the target partition according to the original backlight refresh rule solves the technical problem in the related technology that when the user performs handwriting operation on the display screen, the partition backlight refreshes frame by frame, causing the backlight partition refresh to be significantly delayed from the handwritten content display. In addition, by obtaining the size information of the handwritten content, when the handwritten content covers multiple backlight partitions, all the target partitions covered by the handwritten content can be determined, ensuring that all the target partitions corresponding to the handwritten content are refreshed, that is, ensuring the accuracy of the backlight refresh, and improving the user's handwriting experience. In addition, by calculating the first distance and the second distance and combining the length values ​​of each side in the backlight partition, the multiple backlight partitions covered by the handwritten content can be accurately determined, thereby ensuring the backlight refresh effect.

[0139] Fig.10 A flowchart of another partition backlight control method provided by an embodiment of the present application. The partition backlight control method is based on the aforementioned partition backlight control method, combined with the display brightness of the handwritten content, to determine the reasonable backlight brightness when the target partition is refreshed. Specifically, refer to Fig.10 The partition backlight control method includes steps 410 to 450:

[0140] Step 410: Receive the touch coordinates corresponding to the handwriting operation, the size information of the handwriting content corresponding to the touch coordinates, and the display brightness of the handwriting content.

[0141] Currently, the size information of handwritten content mainly refers to the display area of ​​the handwritten content (ie, the area of ​​the shape of the handwritten content).

[0142] The display brightness of handwritten content can be understood as the brightness value set for handwritten content when the application software that responds to the handwriting operation in the main system displays the handwritten content. The display brightness can be set by the application software itself or by the user. In one embodiment, the display brightness is determined based on the RGB value when the handwritten content is displayed. For example, the average value of the R value, G value, and B value of the handwritten content is used as the display brightness of the handwritten content. Among them, the value range of the R value, G value, and B value is not currently limited. Currently, the higher the R value, G value, and B value, the greater the corresponding display brightness. When the application software that responds to the handwriting operation receives the touch coordinates corresponding to the handwriting operation, it can instruct the main system to send the display brightness, size information, and touch coordinates to the partition backlight control system together.

[0143] Step 420: Obtain a target partition list according to the touch coordinates, the size information, and the arrangement information of the plurality of backlight partitions. The target partition list includes at least one target partition, and the at least one target partition is used to provide backlight for the handwritten content.

[0144] This process may refer to step 320 .

[0145] Step 430: Convert the display brightness into a first backlight brightness value suitable for the backlight partition.

[0146] It can be understood that display brightness refers to the brightness when displaying handwritten content, which is determined according to the RGB value of the handwritten content. The application software that responds to the handwriting operation cannot clearly understand the determination rules of the partition backlight control system when determining the backlight brightness. Therefore, the display brightness and the backlight brightness can be considered as data under different systems, with different determination methods. Therefore, the display brightness cannot be directly used as the backlight brightness. Based on this, in one embodiment, after the partition backlight control system obtains the display brightness, it converts the display brightness into the backlight brightness suitable for the partition backlight control system. Currently, the backlight brightness (i.e., the backlight value) obtained based on the display brightness conversion is recorded as the first backlight brightness value.

[0147] In one embodiment, when determining the first backlight brightness, this step may specifically include: dividing the display brightness by a preset maximum display brightness, and multiplying the result of the division by the maximum backlight brightness to obtain a first backlight brightness value suitable for the backlight partition.

[0148] The preset maximum display brightness is related to the number of bits (binary bits) of the R value, G value and B value. For example, when the number of bits of the R value, G value and B value is 12 bits, the maximum values ​​of the R value, G value and B value are all 4095. At this time, the average value of the three is 4095, which is the maximum display brightness that can be achieved when the handwritten content is currently displayed. In one embodiment, the preset maximum display brightness is pre-stored in the partition backlight control system. Alternatively, the main system sends the display brightness and the preset maximum display brightness to the partition backlight control system for use by the partition backlight control system.

[0149] The maximum backlight brightness refers to the maximum value of the backlight brightness that can be provided currently. For example, when the number of bits representing the backlight brightness in binary format is 10, it indicates that the maximum value of the backlight brightness (ie, the maximum backlight brightness) is 1023.

[0150] In one embodiment, the calculation formula of the first backlight brightness value is: R'=(R / Rmax)*R'max, where R' represents the first backlight brightness value, R represents the display brightness, Rmax represents the maximum display brightness, and R'max represents the maximum backlight brightness. That is, there is a proportional relationship between the backlight brightness and the corresponding display brightness. For example, the maximum display brightness is 4095, the maximum backlight brightness is 1023, and the display brightness is 1000. At this time, the calculated first backlight brightness value is approximately equal to 250.

[0151] Step 440: Determine the backlight value corresponding to the target partition according to the second backlight brightness value currently used by the target partition, the first backlight brightness value, the coordinate area of ​​the target partition, and the display area.

[0152] Exemplarily, the backlight brightness currently used by the target partition is recorded as the second backlight brightness value, and the second backlight brightness value can also be understood as the backlight value corresponding to the target partition in the currently used partition backlight type. If the currently used partition backlight type is still being calculated, then the backlight value of the target partition in the partition backlight type used in the previous refresh can be used as the second backlight brightness value. If there is no previous refresh at present, then the second backlight brightness value can be determined to be zero.

[0153] The backlight value when the target partition provides backlight for the handwritten content, that is, the backlight value corresponding to the current target partition, can be obtained according to the first backlight brightness value, the second backlight brightness value, the display area and the coordinate area of ​​the target partition.

[0154] Among them, the coordinate area of ​​the target partition refers to the area of ​​the coordinate range corresponding to the target partition in the coordinate system, which can also be understood as the area of ​​the target partition. Currently, the coordinate areas of each backlight partition are equal. Optionally, the coordinate area can be determined according to the arrangement information. For example, the total number of backlight partitions is determined according to the number of rows and columns of the partitioned backlight, and the total area of ​​all partitions is determined according to the total coordinate range. After that, the total area is divided by the total number to obtain the coordinate area of ​​each backlight partition. For another example, the coordinate area of ​​the partition is calculated according to the length value of each side in the backlight partition (used when determining the target partition).

[0155] In one embodiment, when there are multiple target partitions, the area occupied by the handwritten content in each target partition may be different, and different areas have different effects on the backlight brightness of the target partition. For example, the closer the area occupied by the handwritten content in the target partition is to the coordinate area of ​​the target partition, the greater the effect of the first backlight brightness value on the second backlight brightness value. Therefore, it is necessary to first determine the area occupied by the handwritten content in each target partition, and then determine the brightness value corresponding to the target partition in combination with the occupied area. Based on this, in the embodiment, after step 420, it also includes: determining the sub-display area of ​​the handwritten content in each target partition according to the size information, the coordinate range of each backlight partition, and the target partition list. Correspondingly, step 440 may specifically include: determining the backlight value corresponding to the target partition according to the second backlight brightness value currently used by the target partition, the first backlight brightness value, the coordinate area of ​​the target partition, and the sub-display area corresponding to the target partition.

[0156] Among them, the area occupied by the handwritten content in each target partition is recorded as the sub-display area. At this time, each target partition has a corresponding sub-display area, and the sub-display area can be the coordinate area of ​​the target partition, or it can be smaller than the coordinate area of ​​the target partition. Among them, the sub-display area can be obtained based on the existing geometric calculation method. For example, when the shape of the handwritten content is a rectangle, the area it covers in each target partition is also a rectangle. At this time, the corresponding sub-display area can be determined according to the length of the side of the area covered by the handwritten content in each target partition. It can be understood that the step of determining the sub-display area and step 430 can be performed simultaneously or successively, and there is no limitation at present.

[0157] After that, the sub-display area can be used to calculate the backlight value corresponding to the target partition when refreshing the target partition. In one embodiment, when determining the backlight value corresponding to the target partition according to the second backlight brightness value currently used by the target partition, the first backlight brightness value, the coordinate area of ​​the target partition, and the sub-display area corresponding to the target partition, the steps 441 to 443 may be included:

[0158] Step 441: Calculate the backlight brightness difference between the first backlight brightness value and the second backlight brightness value currently used by the target partition.

[0159] The backlight brightness difference may reflect the difference between the backlight brightness required for displaying handwritten content and the backlight brightness currently used.

[0160] Step 442: Divide the backlight brightness difference by the area ratio to obtain a division result, where the area ratio is the ratio of the sub-display area corresponding to the target partition to the coordinate area of ​​the target partition.

[0161] The division result can be reflected as a relative value of the backlight brightness that needs to be adjusted when providing backlight for handwritten content based on the second backlight brightness value. The division result is determined by the backlight brightness difference and the ratio of the sub-display area to the coordinate area. At this time, the larger the ratio of the sub-display area to the coordinate area, the closer the division result is to the backlight brightness difference.

[0162] Step 443: Calculate the backlight brightness sum of the division result and the second backlight brightness value, and determine the backlight brightness sum as the backlight value corresponding to the target partition.

[0163] By adding the division result representing the relative value of the backlight brightness adjustment to the second backlight brightness value, the backlight value corresponding to the target partition when refreshing the target partition can be obtained.

[0164] At this time, when refreshing the target partition, the calculation formula of the backlight value corresponding to the target partition is: L = L0 + (R'-L0) * S / S0, where L represents the backlight value corresponding to the target partition, L0 represents the second backlight brightness value, R' represents the first backlight brightness value, S represents the sub-display area, and S0 represents the coordinate area of ​​the target partition. Fig.11 , the target partition 77 contains all the handwritten content 76, that is, the sub-display area is equal to the display area of ​​the handwritten content. At this time, the backlight value corresponding to the target partition can be understood as the backlight brightness obtained after an object with the first backlight brightness value and an area equal to the display area is pasted on the coordinate area with the second backlight brightness value.

[0165] Optionally, after obtaining the backlight value corresponding to each target partition, the backlight value may be written into a backlight brightness list, in which the backlight value corresponding to each target partition is recorded.

[0166] Step 450, refresh the target partition according to the backlight value corresponding to the target partition, and refresh the backlight partitions except the target partition according to the preset backlight refresh rule and the backlight value corresponding to each backlight partition except the target partition. The backlight value corresponding to each backlight partition is determined according to the display content of the display screen.

[0167] Exemplarily, the target partition is refreshed based on the backlight value corresponding to the target partition so that the target partition provides the backlight value. It is understandable that after determining the backlight value corresponding to the target partition, the currently used partition backlight type can be updated, in which the target partition uses the newly calculated backlight value.

[0168] In the above, the touch coordinates corresponding to the handwriting operation, the size information of the handwriting content corresponding to the handwriting operation, and the display brightness of the handwriting content are received through the partition backlight control system. Then, according to the size information, touch coordinates, and the arrangement information of the partition backlight, all target partitions that provide backlight for the handwriting content can be determined, and the backlight value when the target partition provides backlight for the handwriting content is determined in combination with the display brightness of the handwriting content. Then, the target partition is refreshed based on the backlight value of the target partition, and the technical means of continuing to refresh other backlight partitions except the target partition according to the original backlight refresh rule solves the technical problem in the related art that when the user performs handwriting operation on the display screen, the partition backlight refreshes frame by frame, causing the backlight partition refresh to be significantly delayed from the display of the handwriting content. In addition, the display brightness of the handwriting content, the second backlight brightness value of the target partition, the display area of ​​the handwriting content, and the coordinate area of ​​the target partition can obtain the backlight value suitable for the handwriting content, and the target partition is refreshed according to the backlight value. When the handwriting content is displayed on the display screen, the corresponding backlight brightness is more suitable for the handwriting content, thereby improving the display effect of the handwriting content. At this time, the speed of calculating the backlight value in combination with the display brightness of the handwritten content is faster than the speed of obtaining the backlight value in combination with the image corresponding to the display content containing the handwritten content, further avoiding the phenomenon that the handwritten content is displayed first and the backlight follows.

[0169] Fig.12 A schematic diagram of the structure of a partition backlight control device provided by an embodiment of the present application. Fig.12 The partition backlight control device includes: a first receiving unit 501, a target determining unit 502 and a first refreshing unit 503.

[0170] Among them, the first receiving unit 501 is used to receive the touch coordinates corresponding to the handwriting operation. The target determination unit 502 is used to determine the target partition corresponding to the handwriting operation according to the touch coordinates and the arrangement information of multiple backlight partitions, each backlight partition provides backlight to the corresponding display area in the display screen, and there is at least one target partition. The first refresh unit 503 is used to refresh the target partition according to the backlight value corresponding to the target partition, and refresh the backlight partitions except the target partition according to the preset backlight refresh rules and the backlight value corresponding to each backlight partition except the target partition. The backlight value corresponding to each backlight partition is determined according to the display content of the display screen.

[0171] In one embodiment of the present application, when the first receiving unit 501 receives the touch coordinates corresponding to the handwriting operation, it is also used to receive the size information of the handwritten content corresponding to the touch coordinates. The target determination unit 502 is specifically used to: obtain a target partition list according to the touch coordinates, the size information and the arrangement information of the multiple backlight partitions, the target partition list includes at least one target partition, and the at least one target partition is used to provide backlight for the handwritten content.

[0172] In one embodiment of the present application, the target determination unit 502 includes: a first partition determination subunit, which is used to determine the backlight partition containing the touch coordinates according to the arrangement information of multiple backlight partitions, and add the backlight partition containing the touch coordinates as a target partition in the target partition list; a distance calculation subunit, which is used to respectively determine the first distance between each edge in the target partition and the touch coordinates, and determine the second distance between the touch coordinates and the edge of the handwritten content according to the size information; a second partition determination subunit, which is used to determine other backlight partitions covered by the handwritten content according to the first distance, the second distance and the length values ​​of each edge in the backlight partition, and add the other covered backlight partitions as new target partitions in the target partition list.

[0173] In one embodiment of the present application, the second partition determination subunit includes: a distance difference calculation subunit, which is used to calculate the distance difference between the second distance and the first distance; a partition quantity calculation subunit, which is used to divide the corresponding distance difference by the length value of the vertical side in the backlight partition and round up to obtain the corresponding first partition quantity when the first distance corresponds to the horizontal edge in the target partition, and divide the corresponding distance difference by the length value of the horizontal side in the backlight partition and round up to obtain the corresponding second partition quantity when the first distance corresponds to the vertical edge in the target partition; a partition determination subunit, which is used to determine other backlight partitions covered by the handwritten content based on each first partition quantity and each second partition quantity, and add the other covered backlight partitions as new target partitions in the target partition list.

[0174] In one embodiment of the present application, it also includes: a distance comparison unit, which is used for, when the first distance corresponds to the horizontal edge of the target partition, if the second distance is greater than the first distance, executing an operation of dividing the corresponding distance difference by the length value of the vertical edge in the backlight partition and performing a rounding operation to obtain the corresponding number of first partitions, and if the second distance is less than or equal to the first distance, determining that the number of first partitions is zero; when the first distance corresponds to the vertical edge of the target partition, if the second distance is greater than the first distance, executing an operation of dividing the corresponding distance difference by the length value of the horizontal edge in the backlight partition and performing a rounding operation to obtain the corresponding number of second partitions, and if the second distance is less than or equal to the first distance, determining that the number of second partitions is zero.

[0175] In one embodiment of the present application, the size information includes the display area of ​​the handwritten content, and when the first receiving unit 501 receives the size information of the handwritten content corresponding to the touch coordinates, it is also used to receive the display brightness of the handwritten content. Accordingly, the partition backlight control device also includes: a brightness conversion unit, which is used to convert the display brightness into a first backlight brightness value suitable for the backlight partition before refreshing the target partition according to the backlight value corresponding to the target partition; a brightness determination unit, which is used to determine the backlight value corresponding to the target partition according to the second backlight brightness value currently used by the target partition, the first backlight brightness value, the coordinate area of ​​the target partition, and the display area.

[0176] In one embodiment of the present application, the brightness conversion unit is specifically used to: divide the display brightness by the preset maximum display brightness, and multiply the result of the division by the maximum backlight brightness to obtain a first backlight brightness value suitable for the backlight partition.

[0177] In one embodiment of the present application, the partition backlight control device further includes: a sub-area determination unit, which is used to determine the sub-display area of ​​the handwritten content in each target partition according to the size information, the coordinate range of each backlight partition and the target partition list after obtaining the target partition list according to the touch coordinates, size information and the arrangement information of the multiple backlight partitions. Correspondingly, the brightness determination unit is specifically used to determine the backlight value corresponding to the target partition according to the second backlight brightness value currently used by the target partition, the first backlight brightness value, the coordinate area of ​​the target partition and the sub-display area corresponding to the target partition.

[0178] In one embodiment of the present application, the brightness determination unit includes: a brightness difference calculation subunit, used to calculate the backlight brightness difference between a first backlight brightness value and a second backlight brightness value currently used by a target partition; a division subunit, used to divide the backlight brightness difference by an area ratio to obtain a division result, wherein the area ratio is the ratio of a sub-display area corresponding to the target partition to a coordinate area of ​​the target partition; an addition subunit, used to calculate the backlight brightness sum of the division result and the second backlight brightness value, and determine the backlight brightness sum as the backlight value corresponding to the target partition.

[0179] The partition backlight control device provided in the embodiment of the present application is included in a partition backlight control system and can be used to execute the partition backlight control method provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0180] It is worth noting that in the embodiment of the above-mentioned partitioned backlight control device, the various units and modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0181] Fig.13 This is a schematic diagram of a partition backlight control system provided by an embodiment of the present application. Fig.13 As shown, the interactive tablet includes a processor 60, a memory 61, and a plurality of backlight partitions 62. The number of the processor 60 can be one or more. Fig.13 In the figure, a processor 60 and two backlight partitions 62 are taken as an example; the processor 60 and the memory 61, and the multiple backlight partitions 62 can be connected via a bus or other means. Fig.13 The example of connecting through bus is taken in the following.

[0182] The memory 61, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the partition backlight control method in the embodiment of the present application (for example, the first receiving unit 501, the target determination unit 502, and the first refresh unit 503 in the partition backlight control device). The processor 60 executes various functional applications and data processing of the partition backlight control system by running the software programs, instructions and modules stored in the memory 61, that is, realizes the above-mentioned partition backlight control method.

[0183] The processor 60 may be a processor with data processing function such as a microcontroller unit (MCU) or a field programmable gate array (FPGA). When the processor has a storage function, the processor can also be used as a memory, that is, the processor and the memory are integrated in one physical entity.

[0184] At present, the zoned backlight control system may further include backlight zones 62 for providing backlight. Each backlight zone 62 includes a plurality of LEDs of the same number.

[0185] The above-mentioned partition backlight control system includes a partition backlight control device, which can be used to execute any partition backlight control method and has corresponding functions and beneficial effects.

[0186] One embodiment of the present application also provides a display device, which includes the aforementioned partition backlight control system. The display device may also include a main system and a touch system. The touch system and the partition backlight control system are both located in the display screen of the display device, and the main system can determine the display content of the display screen. Currently, the workflow of the main system, the touch system, and the partition backlight control can refer to the relevant description in the aforementioned embodiment, and has corresponding functions and beneficial effects.

[0187] One embodiment of the present application also provides a storage medium containing computer executable instructions, which, when executed by a processor of the partition backlight control system, are used to perform relevant operations in the partition backlight control method provided in any embodiment of the present application, and have corresponding functions and beneficial effects.

[0188] Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products.

[0189] Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the functions in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including an instruction device, which implements the functions specified in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide for implementing the process in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0190] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0191] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0192] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A partition backlight control method, characterized in that: include: Receive the touch coordinates corresponding to the handwriting operation; Determine a target partition corresponding to the handwriting operation according to the touch coordinates and arrangement information of a plurality of backlight partitions, each of the backlight partitions providing backlight to a corresponding display area in the display screen, and there is at least one target partition; Refresh the target partition according to the backlight value corresponding to the target partition, and refresh the backlight partitions except the target partition according to the preset backlight refresh rule and the backlight value corresponding to each backlight partition except the target partition, and the backlight value corresponding to each backlight partition is determined according to the display content of the display screen.

2. The partition backlight control method according to claim 1, characterized in that: The receiving of the touch coordinates corresponding to the handwriting operation also includes: Receiving size information of handwritten content corresponding to the touch coordinates; Determining a target partition corresponding to the handwriting operation according to the touch coordinates and arrangement information of the plurality of backlight partitions includes: A target partition list is obtained according to the touch coordinates, the size information and arrangement information of the plurality of backlight partitions, wherein the target partition list includes at least one target partition, and the at least one target partition is used to provide backlight for the handwritten content.

3. The partition backlight control method according to claim 2, characterized in that: The step of obtaining a target partition list according to the touch coordinates, the size information, and the arrangement information of the plurality of backlight partitions includes: Determine a backlight partition including the touch coordinates according to arrangement information of a plurality of backlight partitions, and add the backlight partition including the touch coordinates as a target partition in a target partition list; respectively determining a first distance between each edge in the target partition and the touch coordinates, and determining a second distance between the touch coordinates and an edge of the handwritten content according to the size information; Other backlight partitions covered by the handwritten content are determined according to the first distance, the second distance and the length values ​​of each side in the backlight partition, and the other backlight partitions covered are added as new target partitions in the target partition list.

4. The partition backlight control method according to claim 3, characterized in that: The determining, according to the first distances, the second distances, and the length values ​​of the sides in the backlight partitions, other backlight partitions covered by the handwritten content, and adding the other covered backlight partitions as new target partitions to the target partition list includes: Calculate the distance difference between the second distance and the first distance; When the first distance corresponds to the horizontal side of the target partition, the corresponding distance difference is divided by the length of the vertical side of the backlight partition and the integer operation is performed to obtain the corresponding first partition quantity; when the first distance corresponds to the vertical side of the target partition, the corresponding distance difference is divided by the length of the horizontal side of the backlight partition and the integer operation is performed to obtain the corresponding second partition quantity; Based on the number of each of the first partitions and the number of each of the second partitions, other backlight partitions covered by the handwritten content are determined, and the other covered backlight partitions are added as new target partitions in the target partition list.

5. The partition backlight control method according to claim 4, characterized in that: Also includes: When the first distance corresponds to the horizontal side of the target partition, if the second distance is greater than the first distance, performing an operation of dividing the corresponding distance difference by the length of the vertical side of the backlight partition and performing a rounding operation to obtain the corresponding number of first partitions, and if the second distance is less than or equal to the first distance, determining that the number of first partitions is zero; When the first distance corresponds to the vertical edge in the target partition, if the second distance is greater than the first distance, the corresponding distance difference is divided by the length value of the horizontal edge in the backlight partition and rounded to obtain the corresponding number of second partitions; if the second distance is less than or equal to the first distance, the number of second partitions is determined to be zero.

6. The partition backlight control method according to claim 2, characterized in that: The size information includes the display area of ​​the handwritten content, The receiving of the size information of the handwritten content corresponding to the touch coordinates also includes: receiving the display brightness of the handwritten content; Before refreshing the target partition according to the backlight value corresponding to the target partition, the method includes: Converting the display brightness into a first backlight brightness value suitable for a backlight partition; A backlight value corresponding to the target partition is determined according to a second backlight brightness value currently used by the target partition, the first backlight brightness value, a coordinate area of ​​the target partition, and the display area.

7. The partition backlight control method according to claim 6, characterized in that: The converting the display brightness into a first backlight brightness value suitable for the backlight partition comprises: The display brightness is divided by a preset maximum display brightness, and the result of the division is multiplied by the maximum backlight brightness to obtain a first backlight brightness value suitable for the backlight partition.

8. The partition backlight control method according to claim 6, characterized in that: After obtaining the target partition list according to the touch coordinates, the size information and the arrangement information of the plurality of backlight partitions, the method further includes: Determine a sub-display area of ​​the handwritten content in each of the target partitions according to the size information, the coordinate range of each of the backlight partitions, and the target partition list; The determining the backlight value corresponding to the target partition according to the second backlight brightness value currently used by the target partition, the first backlight brightness value, the coordinate area of ​​the target partition, and the display area includes: The backlight value corresponding to the target partition is determined according to the second backlight brightness value currently used by the target partition, the first backlight brightness value, the coordinate area of ​​the target partition, and the sub-display area corresponding to the target partition.

9. The partition backlight control method according to claim 8, characterized in that: The determining the backlight value corresponding to the target partition according to the second backlight brightness value currently used by the target partition, the first backlight brightness value, the coordinate area of ​​the target partition, and the sub-display area corresponding to the target partition includes: Calculate a backlight brightness difference between the first backlight brightness value and a second backlight brightness value currently used by the target partition; Dividing the backlight brightness difference by the area ratio to obtain a division result, wherein the area ratio is a ratio of the sub-display area corresponding to the target partition to the coordinate area of ​​the target partition; A backlight brightness sum of the division result and the second backlight brightness value is calculated, and the backlight brightness sum is determined as the backlight value corresponding to the target partition.

10. A partition backlight control device, characterized in that: include: A first receiving unit, used for receiving touch coordinates corresponding to a handwriting operation; a target determination unit, configured to determine a target partition corresponding to the handwriting operation according to the touch coordinates and arrangement information of a plurality of backlight partitions, each of the backlight partitions providing backlight to a corresponding display area in the display screen, and there is at least one target partition; A first refresh unit is used to refresh the target partition according to the backlight value corresponding to the target partition, and to refresh the backlight partitions other than the target partition according to a preset backlight refresh rule and the backlight value corresponding to each backlight partition except the target partition, and the backlight value corresponding to each backlight partition is determined according to the display content of the display screen.

11. A partition backlight control system, characterized in that: include: one or more processors, memory, and a plurality of backlight partitions; The backlight partition is used to provide backlight to the corresponding display area in the display screen; The memory is used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the partition backlight control method as described in any one of claims 1-9.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the partition backlight control method as described in any one of claims 1 to 9 is implemented.

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