LED Screen Display Method, Display Screen, Device, Electronic Device and Storage Medium

Abstract

The present application relates to the field of information security technology. Specifically, it relates to an LED screen display method, a display screen, a device, an electronic device, and a storage medium. The LED screen display method is used to prevent others from obtaining a complete picture by taking pictures. The LED screen display method includes the following steps: obtaining the refreshed pictures of each row in each frame of the LED screen; generating a plurality of local gray-scale information by scattering the total gray-scale information of each row of the refreshed pictures according to the gray-scale levels; alternately refreshing the local gray-scale information of each row in sequence according to the inter-row order until the refresh display of one frame of the picture is completed. By scattering the total gray-scale information of each row of the refreshed pictures according to the gray-scale levels to generate a plurality of local gray-scale information, and alternately refreshing the local gray-scale information of each row in sequence according to the inter-row order after recombination, the present application refreshes the refreshed picture of one row multiple times to increase the refresh frequency, improve the visual effect of the picture, and at the same time make it impossible for the camera device to obtain a complete image, thereby realizing the anti-photographing effect of the LED screen.

Description

Technical Field

[0001] This application relates to the field of information security technology. Specifically, it relates to an LED screen display method, a display screen, a device, an electronic device, and a storage medium. Background Art

[0002] With the increasing power of shooting devices and shooting functions, the difficulty of taking pictures has become lower. However, due to the popularity of photography technology and the convenience of taking pictures, while bringing convenience to people, it also brings many security risks. Therefore, it is necessary to propose an LED anti-photography scheme to protect the privacy of users.

[0003] Existing LED anti-photography methods usually add information such as watermarks to the screen to reduce the imaging effect of shooting, or detect the signals of secretly taking pictures devices to prevent secretly taking pictures. However, the above-mentioned schemes are all passive anti-secretly taking pictures methods and cannot fundamentally solve the problem of preventing secretly taking pictures.

[0004] In response to the above problems, there is currently no effective technical solution. Summary of the Invention

[0005] The purpose of this application is to provide an LED screen display method, a display screen, a device, an electronic device, and a storage medium, aiming to solve the problem that it is impossible to fundamentally prevent secretly taking pictures of the LED screen.

[0006] In a first aspect, this application provides an LED screen display method for preventing others from obtaining a complete picture through taking pictures. The LED screen display method includes the following steps:

[0007] Obtain the refreshed pictures of each row in each frame of the LED screen. The refreshed picture is composed of a plurality of gray-scale information;

[0008] Scatter the total gray-scale information of each row of the refreshed picture according to the gray-scale level to generate a plurality of local gray-scale information;

[0009] Alternately refresh the local gray-scale information of each row in sequence according to the row order until the refresh display of one frame of the picture is completed.

[0010] This application scatters the total gray-scale information of each row of the refreshed picture according to the gray-scale level to generate a plurality of local gray-scale information, and then alternately refreshes the local gray-scale information of each row in sequence according to the row order, so as to scatter and reorganize the single-row refreshed picture into a picture composed of a plurality of local gray-scale information. By refreshing one row of the refreshed picture multiple times, the gray-scale refresh frequency is increased, the visual effect of the picture is improved, and at the same time, the total gray-scale information of the picture is scattered and reorganized, so that the camera device cannot obtain a complete image, thereby realizing the anti-photography effect of the LED screen.

[0011] Optionally, for an LED screen display method proposed in this application, the step of splitting the total grayscale information of each row of the refreshed screen into multiple local grayscale information according to the grayscale levels includes the following steps:

[0012] Split the total grayscale information of each row of the refreshed screen into multiple grayscale information according to the grayscale levels;

[0013] Randomly arrange all the grayscale information of each row of the refreshed screen to generate multiple first local grayscale information.

[0014] In this application, by splitting and randomly arranging the total grayscale information of each row of the refreshed screen, the grayscale of the screen is not arranged from the lowest grayscale level to the highest grayscale level in the original grayscale level order, and a row of the refreshed screen is reorganized into multiple first local grayscale information for refreshing. Different from the conventional line-by-line refreshing method, it makes the imaging device unable to obtain a clear image when imaging.

[0015] Optionally, for an LED screen display method proposed in this application, the step of splitting the total grayscale information of each row of the refreshed screen into multiple local grayscale information according to the grayscale levels includes the following steps:

[0016] Split at least one grayscale information in each row of the refreshed screen to obtain multiple fragmented grayscale information;

[0017] Randomly reorganize the multiple fragmented grayscale information and the multiple grayscale information to generate multiple second local grayscale information.

[0018] In this application, by further disassembling at least one grayscale information in the refreshed screen, each row of the refreshed screen is reorganized by multiple fragmented grayscale information and multiple grayscale information, further disrupting the refreshed screen and further preventing the imaging device from capturing a clear and complete image of the LED screen.

[0019] Optionally, for an LED screen display method proposed in this application, the difference between the number of grayscale information of the local grayscale information with the largest number of grayscale information and the local grayscale information with the smallest number of grayscale information is greater than or equal to 2.

[0020] Optionally, for an LED screen display method proposed in this application, each local grayscale information generated by splitting is arranged from the lowest grayscale level to the highest grayscale level in the grayscale level order.

[0021] A method for LED screen display proposed in this application generates multiple local grayscale information by dispersing the total grayscale information of each row of the refreshed picture according to the grayscale level, and then alternately refreshes each local grayscale information in the row order, thus changing the original line-by-line refresh into multiple refreshes of a single-line picture, thereby increasing the grayscale refresh frequency, improving the visual effect of the picture, and at the same time dispersing and reorganizing the total grayscale information of the picture, so that the camera device cannot obtain a complete image, thereby achieving the anti-photographing effect of the LED screen.

[0022] In a second aspect, this application provides a display screen, which includes multiple display areas. Each display area is controlled by an independent driving IC for display, and the refresh directions of adjacent display areas are different. Each display area uses the LED screen display method as described in the first aspect for refresh display.

[0023] In this application, the display of each display area is controlled by an independent driving IC. By controlling the driving ICs of two adjacent display areas, the refresh directions of two adjacent display areas are made different. And because the total grayscale information of the refreshed picture of each display area is dispersed, the picture obtained by the camera device during shooting is divided into different display areas, and the pictures displayed in different display areas are different, so that a complete picture cannot be obtained.

[0024] Optionally, for a display screen proposed in this application, each display area uses any one of the refresh directions of horizontal refresh, reverse horizontal refresh, vertical refresh, reverse vertical refresh, and skip-line refresh for picture refresh display.

[0025] A display screen provided in this application controls the refresh directions of display areas through multiple independent driving ICs, so that different display areas are refreshed in different refresh directions. In each display area, the total grayscale information of each row of the refreshed picture is dispersed according to the grayscale level to generate multiple local grayscale information, and after reorganization, the local grayscale information of each row is alternately refreshed in the row order, thereby increasing the grayscale refresh frequency by refreshing a single row of the refreshed picture multiple times, improving the visual effect of the picture, and at the same time dispersing and reorganizing the total grayscale information of the picture, so that the camera device cannot obtain a complete image, thereby achieving the anti-photographing effect of the LED screen.

[0026] In a third aspect, this application provides an LED screen display device for preventing others from obtaining a complete picture by taking pictures. An LED screen display device includes:

[0027] An acquisition module, which is used to acquire each row of the refreshed pictures of each frame of the LED screen;

[0028] A local grayscale information generation module: The local grayscale information generation module is used to disperse the total grayscale information of each row of the refreshed picture according to the grayscale level to generate multiple local grayscale information;

[0029] A refresh module, which is used to sequentially refresh the local grayscale information of each row in row order until the refresh display of a frame of picture is completed.

[0030] An LED screen display device provided by the present application generates multiple local grayscale information by dispersing the total grayscale information of each row of the refreshed picture according to the gray level, and then alternately refreshes the local grayscale information of each row in row order, thereby changing the original line-by-line refresh into multiple refreshes of a single row of the refreshed picture, so as to improve the gray level refresh frequency and the visual effect of the picture. At the same time, the total grayscale information of the picture is dispersed and reorganized, so that the camera device cannot obtain a complete image, thereby realizing the anti-theft shooting effect of the LED screen.

[0031] In a fourth aspect, an electronic device provided by the present application includes a processor and a memory. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the steps in a method for displaying an LED screen provided in the first aspect as described above are run.

[0032] In a fifth aspect, a storage medium provided by the present application stores a computer program. When the computer program is executed by a processor, the steps in a method for displaying an LED screen provided in the first aspect as described above are run.

[0033] As can be seen from the above, a method for displaying an LED screen, a display screen, a device, an electronic device, and a storage medium provided by the present application disperse the total grayscale information of each row of the refreshed picture according to the gray level and randomly reorganize it to obtain multiple local grayscale information. After reorganization, the local grayscale information of each row is alternately refreshed in row order, so as to improve the gray level refresh frequency by refreshing a single row of the refreshed picture multiple times and improve the visual effect of the picture. At the same time, the total grayscale information of the picture is dispersed and reorganized, so that the camera device cannot obtain a complete image, thereby realizing the anti-theft shooting effect of the LED screen. Moreover, the LED display screen controls the refresh direction of the display area through multiple independent driving ICs, so that different display areas are refreshed in different refresh directions, and the picture obtained by the camera device during imaging is divided into different areas and the content displayed in each area cannot obtain a complete picture, further enhancing the anti-theft shooting effect.

[0034] Other features and advantages of the present application will be described in the subsequent specification, and part of them will become obvious from the specification or be understood by implementing the present application. The objectives and other advantages of the present application can be realized and obtained through the structures specifically pointed out in the written specification and the drawings. Description of the Drawings

[0035] Figure 1 It is a flowchart of the steps of a method for displaying an LED screen provided by an embodiment of the present application.

[0036] Figure 2 A flowchart of an implementation manner of the step of generating a plurality of local gray-scale information by scattering the total gray-scale information of each row of the refreshed picture according to the gray-scale levels in an LED screen display method provided by an embodiment of the present application.

[0037] Figure 3 For Figure 2 A schematic diagram of the generation of a plurality of first local gray-scale information of the steps shown.

[0038] Figure 4 A flowchart of another implementation manner of the step of generating a plurality of local gray-scale information by scattering the total gray-scale information of each row of the refreshed picture according to the gray-scale levels in an LED screen display method provided by an embodiment of the present application.

[0039] Figure 5 For Figure 4 A schematic diagram of the generation of a plurality of second local gray-scale information of the steps shown.

[0040] Figure 6 A schematic diagram of the imaging effect of a camera device for controlling the refresh direction of a plurality of independent driving ICs of a display screen provided by an embodiment of the present application.

[0041] Figure 7 A schematic structural diagram of an LED screen display device provided by an embodiment of the present application.

[0042] Figure 8 A schematic structural diagram of an electronic device provided by an embodiment of the present application.

[0043] Label description: 1. First gray-scale information; 2. Second gray-scale information; 3. Third gray-scale information; 4. Fourth gray-scale information; 5. Fifth gray-scale information; 1a. First fragment gray-scale information; 1b. Second fragment gray-scale information; 4a. Third fragment gray-scale information; 4b. Fourth fragment gray-scale information; 100. Acquisition module; 200. Local gray-scale information generation module; 300. Refresh module; 91. Processor; 92. Memory; 93. Communication bus. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0045] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0046] In general, LED anti-theft camera methods usually include adding watermarks and other information to the picture to reduce the imaging effect of the shooting, or detecting the signal of the hidden camera device to prevent the occurrence of hidden camera. The above solutions are all passive anti-theft camera methods and cannot fundamentally solve the problem of preventing hidden camera behavior.

[0047] First, refer to Figure 1 , Figure 1 A flowchart of a method for displaying an LED screen according to an embodiment of the present invention is provided. Figure 1 The LED screen display method shown is used to prevent others from obtaining a complete picture by taking a photo. The LED screen display method includes the following steps:

[0048] S100, obtaining refresh images of each row of each frame of the LED screen, where the refresh images are composed of multiple grayscale information;

[0049] S200: Scatter the total grayscale information of each refreshed image row according to the grayscale level to generate a plurality of local grayscale information (for ease of description, different embodiments herein use the term "first local grayscale information" and "second local grayscale information" for distinction);

[0050] S300 , refreshing the local grayscale information of each row alternately in sequence according to the row order until the refresh display of one frame of the picture is completed.

[0051] Specifically, the above-mentioned total grayscale information, local grayscale information, grayscale information, and fragment grayscale information respectively represent different grayscale values, among which the total grayscale information represents the grayscale value of the refreshed screen, and the grayscale values represented by the local grayscale information, grayscale information, and fragment grayscale information are all smaller than the grayscale value represented by the total grayscale information, and the grayscale value represented by the total grayscale information is equal to the sum of the grayscale values represented by multiple local grayscale information.

[0052] Specifically, in the above-mentioned step S200, the total grayscale information of each row of the refreshed screen is broken up according to the grayscale level. The number of the multiple grayscale information after the breakup and the grayscale values represented by the corresponding grayscale information do not change. It can be understood that the breakup step is only to break up the multiple grayscale information from a combined state into a free and independent state, so as to facilitate the subsequent recombination and arrangement of the multiple grayscale information into multiple local grayscale information.

[0053] Generally, the screen display of an LED screen usually refreshes the screen line by line for each line of the refreshed screen. The grayscale information of the refreshed screen for each line is arranged in ascending order of grayscale level. After refreshing each line of the refreshed screen, a complete display screen can be obtained.

[0054] Specifically, the imaging device is usually a digital single-lens reflex camera, a web camera, or a mobile phone. These devices all use a CMOS sensor, and most CMOS sensors use a rolling shutter. The pixels in the CMOS sensor are not all exposed to light simultaneously, but each row of the sensor (usually a horizontal row, but can be vertical) is exposed to light sequentially. The first row is enabled to collect light first, and then the second row is enabled after a short time, and so on. After a row is exposed within the set shutter time, the light collection for that row will be disabled. Subsequently, each row will be disabled in turn. The same selected shutter time is used for each row, but the start and end times of each row are staggered. The result is a band of enabled pixels. The width of the band of pixels in the sensing area that moves downward defines the shutter speed, that is, the imaging device obtains a band of pixels for each row and finally combines multiple bands of pixels to obtain a complete image.

[0055] Specifically, the traditional method of refreshing the screen of an LED screen is to refresh the screen line by line until each line of the refreshed screen is refreshed, and then the refresh of one frame of the screen is completed. For example, if there are 4 lines of refreshed screens in the screen of an LED screen, after sequentially refreshing the 4 lines, the refresh of one frame of the screen is completed.

[0056] In this embodiment, the total grayscale information of one line of the refreshed screen is broken up into multiple local grayscale information and randomly arranged and combined. After refreshing one of the local grayscale information in each line of the refreshed screen, switch to the next line and refresh one of the local grayscale information in the next line. After completing one cycle, return to the first line of the refreshed screen and refresh the next local grayscale information, and so on until the refresh of one frame of the screen is completed. For example, if there are 4 lines of refreshed screens in the screen of an LED screen and there are 4 local grayscale information in each line of the refreshed screen, after refreshing the local grayscale information 16 times, the refresh of one frame of the screen is completed.

[0057] Furthermore, by increasing the number of times of refreshing the screen, the original method of refreshing by superimposing grayscale levels line by line is changed to displaying and superimposing the content of one line of the refreshed screen in 4 times of refreshing, thereby increasing the refresh rate of the screen and improving the visual effect on the human eye.

[0058] Generally, the PWM dimming of an LED is achieved by very quickly turning the LED on and off. When the light is always on, the LED light source is in a full-output state. When the light is off, the LED light source is in an off state. When the light is in a half-on and half-off state, our eyes see it emitting light at 50% brightness. As long as the pulses are fast enough, our eyes will convert the pulses into an apparently constant brightness level. During the exposure process of a camera device, if the display mode of the LED screen is the original mode, the LED pulse-width modulation timing can make the LED energized and the currently enabled pixel rows receive light to obtain an image. In this embodiment, since the total gray-level information of the refreshed image of the LED screen is scattered and reorganized, the single-row refreshed image is refreshed multiple times, thereby increasing the refresh rate of the LED screen. Since the gray levels of each local gray-level information are different, the local gray-level information with a high gray level has a relatively high PWM dimming frequency, so the brightness of the high-gray-level part is relatively high, while the local gray-level information with a low gray level has a relatively low PWM dimming frequency. Therefore, the brightness of the low-gray-level part is relatively low, resulting in a brightness difference between the local gray-level information of different gray levels after being refreshed. In addition, for a camera device using a CMOS sensor, the interval of each shutter corresponds to refreshing one row of the refreshed image. In this application, since one row of the refreshed image is reorganized into multiple local gray-level information and refreshed multiple times, it is impossible to complete multiple refreshes within one shutter cycle to display a complete image, so the image captured by the camera device is an image with alternating light and dark. The bright part is the gray level refreshed during one shutter cycle, and the dark part is the gray level not refreshed during one shutter cycle.

[0059] A method for displaying an LED screen proposed in an embodiment of this application scatters the total gray-level information of each row of the refreshed image according to gray levels to generate multiple local gray-level information, and after reorganization, alternately refreshes the local gray-level information of each row in the order between rows, thereby scattering the total gray-level information of the single-row refreshed image to obtain multiple local gray-level information and randomly reorganizing them, changing the original row-by-row refresh to multiple refreshes of the single-row refreshed image, thereby increasing the gray-level refresh frequency and improving the visual effect of the image. At the same time, the total gray-level information of the image is scattered and reorganized, so that the camera device cannot obtain a complete image, thereby realizing the anti-photography effect of the LED screen.

[0060] In some preferred embodiments, referring to Figure 2 , Figure 2 is a flowchart of an embodiment of the step of scattering the total gray-level information of each row of the refreshed image according to gray levels to generate multiple local gray-level information in a method for displaying an LED screen provided by an embodiment of this application. This step includes the following steps:

[0061] S210. Scatter the total gray-level information of each row of the refreshed image according to gray levels to generate multiple gray-level information;

[0062] S211. Randomly arrange all the gray-scale information of each row of the refreshed screen to generate multiple first local gray-scale information.

[0063] Specifically, in this application, the screen of the LED screen is divided into multiple frames, each frame is composed of several sub-frames, each sub-frame is composed of several row control times, and each row control time is composed of several time slices.

[0064] Specifically, each row control time corresponds to refreshing one row of the refreshed screen, and the gray-scale information of each row of the refreshed screen is arranged in ascending order of gray-scale level from low gray-scale level to high gray-scale level. In this embodiment, referring to Figure 3 , Figure 3 FIG. is a conversion schematic diagram of an embodiment of the step of generating multiple local gray-scale information by scattering the total gray-scale information of each row of the refreshed screen in the LED screen display method provided in the application embodiment. From Figure 3It can be obtained that each bar block is gray-scale information corresponding to a gray-scale value, and the length of the gray-scale information represents the magnitude of the gray-scale value. Among them, the first gray-scale information 1, the second gray-scale information 2, the third gray-scale information 3, the fourth gray-scale information 4, and the fifth gray-scale information 5 respectively represent gray-scale information of different gray-scale values. Arranging all the gray-scale information together forms the total gray-scale information. In this embodiment, the number of the fifth gray-scale information 5 is 8. In this embodiment, the total gray-scale information of the refreshed picture in each row is broken up by gray-scale levels to obtain multiple gray-scale information, and then the multiple gray-scale information is randomly combined and arranged to obtain multiple first partial gray-scale information. Specifically, each row of the refreshed picture is composed of two or more first partial gray-scale information, and each first partial gray-scale information is composed of at least one gray-scale information. By breaking up the refreshed picture in each row, the gray-scale information of the picture is not arranged in the original order of gray-scale levels from low gray-scale level to high gray-scale level, and the refreshed picture in one row is reorganized into multiple first partial gray-scale information for refreshing. In this embodiment, the total gray-scale information is composed of 12 gray-scale information. By breaking up the total gray-scale information and randomly arranging and combining it into multiple gray-scale information, and then randomly arranging and combining the multiple gray-scale information, 4 first partial gray-scale information are obtained. Different from the conventional line-by-line refreshing method, since the gray-scale values of different first partial gray-scale information are different, when the imaging device forms an image, the brightness of the high-gray-scale part is higher and the brightness of the low-gray-scale part is lower, so that the imaging device generates an alternately bright and dark picture when forming an image, and a clear picture cannot be obtained. Specifically, in this embodiment, the refreshing method of the LED screen is that each row of the refreshed picture is composed of at least two first partial gray-scale information, and each time a complete first partial gray-scale information is refreshed. When refreshing the picture, first refresh a first partial gray-scale information in the refreshed picture of the first row, then switch to the refreshed picture of the next row to refresh a first partial gray-scale information. After refreshing a round, return to the refreshed picture of the first row to refresh the next first partial gray-scale information, and then switch to the gray-scale picture of the next row, and so on, until all the first partial gray-scale information is refreshed, that is, the refreshing display of one frame of the picture in the LED screen is completed.

[0065] In some preferred embodiments, referring to Figure 4 , Figure 4 is another flowchart of the implementation manner of the step of breaking up the total gray-scale information of the refreshed picture in each row by gray-scale levels to generate multiple partial gray-scale information in the LED screen display method provided by the embodiment of the present application. This step includes the following steps:

[0066] S220. Split at least one gray-scale information in the refreshed picture of each row to obtain multiple fragmented gray-scale information;

[0067] S221. Randomly recombine the multiple fragmented gray-scale information and the multiple gray-scale information to generate multiple second partial gray-scale information.

[0068] Specifically, referring to Figure 5 , Figure 5 which is a conversion schematic diagram of another implementation manner of the step of generating a plurality of local gray-scale information by disassembling the total gray-scale information of each row of the refreshed picture according to gray levels in an LED screen display method provided by an embodiment of the present application. As Figure 5 shown, each bar-shaped block is gray-scale information corresponding to a gray value, and the length of the gray-scale information represents the magnitude of the gray value. Among them, the first gray-scale information 1, the second gray-scale information 2, the third gray-scale information 3, the fourth gray-scale information 4, and the fifth gray-scale information 5 respectively represent gray-scale information with different gray values. Arranging all the gray-scale information together forms the total gray-scale information. In this embodiment, the number of the fifth gray-scale information 5 is 8. To further improve the anti-photographing effect, in this embodiment, the gray-scale information of the refreshed picture is fragmented and disassembled, so that the total gray-scale information of each row of the refreshed picture is composed of a plurality of fragmented gray-scale information and a plurality of gray-scale information. Then, the fragmented gray-scale information and the gray-scale information are randomly recombined to obtain a plurality of second local gray-scale information, thereby further scrambling the refreshed picture and further preventing the imaging device from capturing a clear and complete picture in the LED screen. In this embodiment, the total gray-scale information is composed of 12 gray-scale information. Among them, the first gray-scale information 1 is disassembled into a first fragmented gray-scale information 1a and a second fragmented gray-scale information 1b, the fourth gray-scale information 4 is disassembled into a third fragmented gray-scale information 4a and a fourth fragmented gray-scale information 4b. Finally, the fragmented gray-scale information and the gray-scale information are randomly recombined to obtain 4 second local gray-scale information.

[0069] Specifically, compared with steps S210 and S211, in this step, the refreshed picture is fragmented and split on the basis of random sorting, so that the number of the fragmented gray-scale information is greater than the number of the gray-scale information in steps S210 and S211, making the distribution of the recombined second local gray-scale information more disordered than the gray-scale distribution of the first local gray-scale information. Thus, when the imaging device forms an image, the light and dark alternate more frequently, improving the anti-photographing effect of the LED screen.

[0070] Optionally, in some embodiments, the total gray-scale information of the refreshed picture is disassembled into a plurality of fragmented gray-scale information with the same length, and then randomly recombined to obtain the second local gray-scale information. To improve the anti-photographing effect, preferably, in this embodiment, the total gray-scale information of the refreshed picture is disassembled into a plurality of fragmented gray-scale information with different lengths, making the length of the second local gray-scale information after random recombination uneven, resulting in a phenomenon of low gray and low refresh for the refreshed picture. This phenomenon has no impact on the visual perception of the human eye, but when the imaging device forms an image, due to the different lengths of each second local gray-scale information, a picture with an alternating distribution of light and dark will be generated.

[0071] In some preferred embodiments, for an LED screen display method proposed in this application, the difference between the number of gray-scale information of the local gray-scale information with the largest number of gray-scale information and the local gray-scale information with the smallest number of gray-scale information is greater than or equal to 2.

[0072] Optionally, in some embodiments, in some examples, if the difference between the number of gray-scale information of the local gray-scale information with the largest number of gray-scale information and the local gray-scale information with the smallest number of gray-scale information is less than 2, the number of gray-scale values obtained during each refresh is similar, which may result in similar magnitudes of the gray-scale values for each refresh, making the bright and dark stripes less obvious when the imaging device takes an image, thereby reducing the anti-photography effect. Therefore, preferably, in this embodiment, the difference between the number of gray-scale information of the local gray-scale information with the largest number of gray-scale information and the local gray-scale information with the smallest number of gray-scale information is set to be greater than or equal to 2, so that the number of gray-scale information refreshed each time is not equal, thereby making the difference between the gray-scale values obtained for each refresh larger, and ultimately making the bright and dark stripes obvious in the image obtained by the imaging device when taking an image, thereby improving the anti-photography effect of the LED display screen image.

[0073] In some preferred embodiments, for an LED screen display method proposed in this application, the gray-scale information in each generated local gray-scale information is arranged in ascending order of gray-scale level from the lowest gray-scale level to the highest gray-scale level.

[0074] Specifically, in the general display method of an LED screen, the gray-scale information for refreshing the screen is arranged in ascending order of gray-scale level. To ensure that the refreshed screen can be normally displayed to the human eye and prevent affecting the visual perception of the human eye, in this embodiment, the gray-scale information in each generated local gray-scale information is also arranged in ascending order of gray-scale level from the lowest gray-scale level to the highest gray-scale level.

[0075] In a second aspect, a display screen proposed in this embodiment includes a plurality of display areas. Referring to Figure 6 , Figure 6 is a schematic diagram of the imaging effect of a camera device controlled by multiple independent driving ICs for refreshing directions of a display screen provided in an embodiment of this application. As Figure 6 shown, each display area is controlled for display by an independent driving IC, and the refreshing directions of adjacent display areas are different. Each display area uses the LED screen display method in the first aspect for refreshing and displaying.

[0076] Specifically, the refreshing direction of the display screen is the arrangement direction of the refreshed screen for each row. For example, if the refreshing direction is horizontal refreshing, the refreshed screen is arranged from left to right along the lowest gray-scale level to the highest gray-scale level; if the refreshing direction is reverse horizontal refreshing, the refreshed screen is arranged from right to left along the lowest gray-scale level to the highest gray-scale level, and so on. Different refreshing directions correspond to different arrangement directions of the refreshed screen.

[0077] Specifically, in this embodiment, different independent driving ICs can control the selection of different refresh screen recombination methods and / or control different refresh directions.

[0078] Optionally, if the independent driving IC only controls the recombination method of the refresh screen, the refresh directions of each display area are the same. By using the LED screen display method of the first aspect, the recombination methods of the refresh screens of each display area are different, so that the degree of light and dark interleaving of each screen is different. Finally, the image obtained by the imaging device has multiple areas, and the light and dark stripes of each display area are inconsistent.

[0079] Optionally, if the independent driving IC only controls the refresh direction and the recombination method of the refresh screen is the same, the image obtained by the imaging device has multiple display areas. The light and dark stripes of each display area are relatively uniform, but the light and dark stripe directions of adjacent display areas are inconsistent.

[0080] Preferably, in this embodiment, the independent driving IC controls both the recombination method of the refresh screen and the refresh direction, so that in the image obtained by the imaging device, there are multiple display areas, the degree of light and dark stripe interleaving of each display area is inconsistent, and the light and dark stripe directions of adjacent display areas are inconsistent, thereby making the image captured by the imaging device more chaotic and improving the anti-photographing effect of the LED screen.

[0081] A display screen proposed in an embodiment of the present application controls the refresh direction of a display area through multiple independent driving ICs, so that different display areas are refreshed in different refresh directions. In each display area, the total gray-level information of each row of the refresh screen is scattered and randomly recombined according to gray levels to obtain multiple local gray-level information. After recombination, the local gray-level information of each row is alternately refreshed in the order of rows, thereby scattering the total gray-level information of a single-row refresh screen to generate multiple local gray-level information, and refreshing the single-row refresh screen in multiple times, so as to improve the gray-level refresh frequency and the visual effect of the screen. At the same time, the total gray-level information of the screen is scattered and recombined, so that the imaging device cannot obtain a complete image, thereby realizing the anti-photographing effect of the LED screen.

[0082] Specifically, the driving IC displays the picture by driving and refreshing each row of the refreshed image row by row. In some embodiments, displaying the picture by using the LED screen display method proposed in the first aspect will cause the imaging device to display a light and dark interleaved picture during imaging. On this basis, each display area is individually controlled by an independent driving IC, so that the gray-level refresh directions of each area are different, so that the picture obtained by the imaging device is divided into multiple different areas, and the light and dark stripe directions displayed in different areas are different.

[0083] Optionally, the gray-scale refreshing method is randomly selected in different display areas for screen refreshing. Specifically, in this embodiment, steps S210 and S211 are one of the gray-scale refreshing methods, and steps S220 and S221 are another gray-scale refreshing method. Since the selection probability of each gray-scale refreshing direction is the same, it may cause the displayed images in adjacent areas to be continuous images, thus affecting the anti-photography effect. Preferably, in this embodiment, it is set that the selected gray-scale refreshing directions of adjacent display areas are different to ensure that in the image formed by the imaging device, the directions of the light and dark stripes in adjacent display areas are different, making it more difficult to distinguish the screen content, thereby improving the anti-photography effect.

[0084] In some preferred embodiments, each display area uses any one of the refreshing directions such as horizontal refreshing, reverse horizontal refreshing, vertical refreshing, reverse vertical refreshing, and line skipping refreshing for screen refreshing display.

[0085] Specifically, multiple gray-scale refreshing directions can be preset, such as horizontal refreshing, reverse horizontal refreshing, vertical refreshing, reverse vertical refreshing, line skipping refreshing, and oblique refreshing. Specifically, the oblique refreshing can also be divided into 30° inclined refreshing, 45° inclined refreshing, and 60° inclined refreshing.

[0086] Specifically, by controlling different refreshing directions, the screen obtained by the imaging device is as Figure 6 shown, having multiple display areas, and the directions of the light and dark stripes in adjacent display areas are inconsistent, making it difficult to distinguish the screen content of the image formed by the imaging device, thereby realizing the anti-photography function of the LED screen.

[0087] In a third aspect, referring to Figure 7 , Figure 7 is a schematic structural diagram of an LED screen display device provided by an embodiment of the present application. Figure 7 As shown in the schematic structural diagram of an LED screen display device for preventing others from obtaining a complete screen by taking pictures, an LED screen display device includes:

[0088] An acquisition module 100, and the acquisition module 100 is used to acquire the refreshing screens of each row of each frame of the LED screen;

[0089] A local gray-scale information generation module 200: The local gray-scale information generation module 200 is used to break up the total gray-scale information of each row of the refreshing screen into multiple local gray-scale information according to the gray levels;

[0090] A refreshing module 300, and the refreshing module 300 is used to alternately refresh the local gray-scale information of each row in sequence according to the row order until the refreshing display of one frame of the screen is completed.

[0091] An LED screen display device proposed in an embodiment of the present application divides the total gray-scale information of each row of the refreshed picture by gray levels, randomly reorganizes it to obtain multiple local gray-scale information, and then alternately refreshes the local gray-scale information of each row in the order of rows. As a result, the total gray-scale information of a single row of the refreshed picture is broken up and reorganized into multiple local gray-scale information. By refreshing a row of the refreshed picture multiple times, the gray-scale refresh frequency is increased, improving the visual effect of the picture. At the same time, the total gray-scale information of the picture is broken up and reorganized, making it impossible for a camera device to obtain a complete image, thus achieving the anti-photographing effect of the LED screen.

[0092] Specifically, in this embodiment, the acquisition module 100 acquires each row of the refreshed picture of each frame of the LED screen. The gray-scale information of the refreshed picture is arranged in ascending order of gray levels. Subsequently, through the local gray-scale information generation module 200, the total gray-scale information in the refreshed picture is broken up and randomly reorganized to obtain multiple local gray-scale information. Finally, the local gray-scale information is refreshed row by row in sequence until all the local gray-scale information of each row is refreshed, obtaining a complete display picture. This picture appears as an alternating bright and dark picture in the image captured by the camera device, but is a normal display picture in the human eye and does not affect the visual perception effect of the human eye.

[0093] In a fourth aspect, referring to Figure 8 , Figure 8 An electronic device provided by the present application includes: a processor 91 and a memory 92. The processor 91 and the memory 92 are interconnected and communicate with each other through a communication bus 93 and / or other forms of connection mechanisms (not shown). The memory 92 stores a computer program executable by the processor 91. When the electronic device runs, the processor 91 executes the computer program to perform any optional implementation manner of the above embodiments to achieve the following functions: acquiring each row of the refreshed picture of each frame of the LED screen; dividing the total gray-scale information of each row of the refreshed picture by gray levels to generate multiple local gray-scale information; alternately refreshing the local gray-scale information of each row in the order of rows until the refresh display of a frame of the picture is completed.

[0094] In a fifth aspect, the present application provides a storage medium on which a computer program is stored. When the computer program is executed by the processor 91, it performs the method in any optional implementation manner of the above embodiments to achieve the following functions: acquiring an original image and extracting the feature information of the original image, encrypting and generating encrypted data information according to the feature information and the copyright information corresponding to the original image, and steganographically hiding the encrypted data information in the original image, or achieving the following functions: acquiring each row of the refreshed picture of each frame of the LED screen; dividing the total gray-scale information of each row of the refreshed picture by gray levels to generate multiple local gray-scale information; alternately refreshing the local gray-scale information of each row in the order of rows until the refresh display of a frame of the picture is completed.

[0095] As can be seen from the above, a method for LED screen display, a display screen, a device, an electronic device and a storage medium provided by the present application scatter each row of refreshed images by gray level and randomly reorganize them to obtain a plurality of local gray level information. After reorganization, the local gray level information of each row is alternately refreshed in the order between rows, so that the single-row refreshed image is scattered and reorganized into a composition of a plurality of local gray level information. By refreshing a row of refreshed images in multiple times, the gray level refresh frequency is increased, the visual effect of the image is improved, and at the same time, the total gray level information of the image is scattered and reorganized, so that the camera device cannot obtain a complete image, thereby realizing the anti-photographing effect of the LED screen. Moreover, the LED display screen controls the refresh direction of the display area through a plurality of independent driving ICs, so that different display areas are refreshed in different refresh directions, and the images obtained by the camera device during imaging are divided into different areas and the content displayed in each area cannot obtain a complete image, further enhancing the anti-photographing effect.

[0096] In the embodiments provided by the present application, it should be understood that the disclosed device and method can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of units is only a logical function division, and there may be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection to each other can be through some communication interfaces, and the indirect coupling or communication connection of the device or unit can be in electrical, mechanical or other forms.

[0097] In addition, the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0098] Furthermore, in each embodiment of the present application, the various functional modules can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.

[0099] In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0100] The above are only the embodiments of the present application and are not intended to limit the protection scope of the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An LED screen display method for preventing others from obtaining a complete picture by taking pictures, characterized in that, The LED screen display method includes the following steps: Obtain the refreshed images of each row in each frame of the LED screen, where the refreshed image is composed of a plurality of gray-scale information; Scatter the total gray-scale information of each row of the refreshed image according to gray levels to generate a plurality of local gray-scale information; Alternately refresh the local gray-scale information of each row in sequence according to the row order until the refresh display of one frame of the image is completed; The step of scattering the total gray-scale information of each row of the refreshed image according to gray levels to generate a plurality of local gray-scale information includes the following steps: Split at least one of the gray-scale information in each row of the refreshed image to obtain a plurality of fragmented gray-scale information; Randomly recombine the plurality of fragmented gray-scale information and the plurality of gray-scale information to generate a plurality of second local gray-scale information.

2. The LED screen display method according to claim 1, characterized in that, The difference between the number of gray-scale information of the local gray-scale information with the largest number of gray-scale information and the local gray-scale information with the smallest number of gray-scale information is greater than or equal to 2.

3. The LED screen display method according to claim 1, characterized in that, The gray-scale information in each of the locally generated gray-scale information is arranged in ascending order of gray level from low gray level to high gray level.

4. A display screen, characterized in that, The display screen includes a plurality of display areas, each display area is controlled by an independent driving IC for display, the refresh directions of adjacent display areas are different, and each display area is refreshed and displayed by using the LED screen display method according to any one of claims 1-3.

5. The display screen according to claim 4, characterized in that, Each display area performs picture refresh display in any one of the refresh directions of horizontal refresh, reverse horizontal refresh, vertical refresh, reverse vertical refresh, and skip-line refresh.

6. An LED screen display device for preventing others from obtaining a complete picture by taking pictures, characterized in that, The LED screen display device includes: An acquisition module (100), where the acquisition module (100) is used to acquire the refreshed images of each row in each frame of the LED screen; A local gray-scale information generation module (200): The local gray-scale information generation module (200) is used to scatter the total gray-scale information of each row of the refreshed image according to gray levels to generate a plurality of local gray-scale information; A refresh module (300), where the refresh module (300) is used to alternately refresh the local gray-scale information of each row in sequence according to the row order until the refresh display of one frame of the image is completed; Scattering the total gray-scale information of each row of the refreshed image according to gray levels to generate a plurality of local gray-scale information includes: Split at least one of the gray-scale information in each row of the refreshed image to obtain a plurality of fragmented gray-scale information; Randomly recombine the plurality of fragmented gray-scale information and the plurality of gray-scale information to generate a plurality of second local gray-scale information.

7. An electronic device, characterized in that, It includes a processor (91) and a memory (92), and the memory (92) stores computer-readable instructions. When the computer-readable instructions are executed by the processor (91), the steps in the method according to any one of claims 1-3 are run.

8. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor (91), the steps in the method according to any one of claims 1-3 are run.

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