Candid photography prevention privacy protection display implementation method based on LED display screen

Abstract

The invention discloses an LED display screen-based secret photography prevention privacy protection display implementation method, which comprises the following steps of: 1, inputting picture information, 2, setting high frequency, 3, shunting the picture information, 4, generating a picture B, 5, overlapping the pictures, 6, playing the pictures, and 7, displaying the pictures. The overlapped combined pictures are played at the same time; the design of the display screen and the modulator is utilized, the pattern A and the pattern B are displayed on the same display screen at the same time, and the pattern B is an interference pattern which is invisible to naked eyes but sensitive to a camera, so that the content on the display can be directly seen by the naked eyes of people; and other people can be prevented from capturing contents on the display by using a camera with an electronic sensor, so that the contents can be protected from secret photography, special equipment such as a peep-proof film or special glasses is not needed, and the device is convenient and practical.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-secret photography, and in particular to a method for realizing anti-secret photography privacy protection display based on an LED display screen. Background Art

[0002] With the development of science and technology, the importance of information security has become increasingly prominent. It is necessary to keep the content on the display confidential to prevent others from secretly photographing it with cameras.

[0003] Solutions of existing technologies: One existing solution is to use an anti-peep film, which can limit the content on the display to a certain angle range, so that the content on the display can only be seen at a specific angle. However, the drawback of this method is that other people can also see the content on the display if they are within the allowed angle range. Another solution is to use polarized light technology, which changes the polarization direction of light so that only people wearing special glasses can see the content on the display. However, the drawback of this method is that everyone needs to wear special glasses, which is not convenient in practical applications. In addition, neither of these two methods can effectively prevent the content on the display from being captured by a camera with an electronic sensor. Therefore, how to ensure that the content of the display is invisible to anyone while ensuring information security is a problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a method for realizing anti-secret photography privacy protection display based on an LED display screen, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for realizing anti-secret photography privacy protection display based on LED display screen, the method comprising the following steps:

[0006] The first step is to input the picture information and store the pictures in the display screen separately, which are divided into one picture and two pictures;

[0007] The second step is to set the high frequency. The high frequency of the picture frequency is set through the modulator inside the display.

[0008] The third step is to split the picture information, store the first picture as display A picture, and send the second picture to the modulator for processing;

[0009] The fourth step is to generate a B picture, transmit the information of the two pictures to the modulator, process the two pictures with high frequency through the modulator, and output a B picture formed by high frequency;

[0010] The fifth step is to overlap the pictures, overlapping the picture A and the picture B to form a combined picture;

[0011] The sixth step is to play the pictures and play the overlapping combined pictures simultaneously.

[0012] Preferably, the display screen is an LED display screen.

[0013] Preferably, the B pattern is used to prevent the A pattern from being secretly photographed, and the A pattern is pattern data that needs to be displayed.

[0014] Preferably, the display ratio of the A pattern and the B pattern is 1:1, and the positions of the A pattern and the B pattern are adjacent.

[0015] Preferably, the modulator is a spatial light modulator, which can adjust the phase and intensity of light in real time according to an input signal to generate a desired B pattern.

[0016] Preferably, the frequency of the B pattern is greater than 1000 cycles per millimeter.

[0017] Preferably, the B pattern is in a grid shape.

[0018] Preferably, the B pattern may also be in a corrugated shape.

[0019] Preferably, the privacy film is used to limit the viewing angle.

[0020] Technical effects and advantages of the present invention:

[0021] The present invention utilizes the design of a display screen and a modulator to simultaneously display two patterns A and B on the same display screen, wherein pattern B is an interference pattern that is invisible to the naked eye but sensitive to a camera. This allows people to directly see the content on the display with their naked eyes, and prevents others from capturing the content on the display with a camera with an electronic sensor, thereby protecting the content from being secretly photographed. At the same time, there is no need to use special equipment, such as a privacy film or special glasses, and the device is convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention provides Figure 1A method for realizing anti-secret-photography privacy protection display based on an LED display screen is shown, and the method comprises the following steps:

[0025] The first step is to input the picture information and store the pictures in the display screen separately, which are divided into one picture and two pictures;

[0026] The second step is to set the high frequency. The high frequency of the picture frequency is set through the modulator inside the display.

[0027] The third step is to split the picture information, store the first picture as display A picture, and send the second picture to the modulator for processing;

[0028] The fourth step is to generate a B picture, transmit the information of the two pictures to the modulator, process the two pictures with high frequency through the modulator, and output a B picture formed by high frequency;

[0029] The fifth step is to overlap the pictures, overlapping the picture A and the picture B to form a combined picture;

[0030] The sixth step is to play the pictures and play the overlapping combined pictures simultaneously.

[0031] Specifically, the display screen is an LED display screen.

[0032] Furthermore, the display screen adopts an LED display screen with a brightness of 1000 nits, a contrast ratio of 3000:1 and a response time of 5ms. Thus, the display screen has the advantages of high brightness, high contrast and fast response, and is suitable for displaying dynamic images.

[0033] Specifically, pattern B is used to prevent pattern A from being secretly photographed, pattern A is the pattern information that needs to be displayed, the display ratio of pattern A and pattern B is 1:1, pattern A and pattern B are adjacent, pattern B is in a grid shape, and pattern B can also be in a wavy shape.

[0034] Furthermore, pattern A is normally visible display content, such as text, pictures, etc., and pattern B is a pattern processed by a modulator. Pattern B is invisible to the naked eye but interferes with camera shooting. Its shape can be a subtle grid or wavy shape. The display ratio of pattern A and pattern B is 1:1, and their positions are adjacent. In this way, flexible control of the visibility and confidentiality of the displayed content can be achieved. By adjusting the display ratio and position of patterns A and B, flexible control of the visibility and confidentiality of the displayed content can be achieved. For example, when confidentiality is required, the ratio of pattern B can be increased so that the entire display content area of ​​pattern A is covered by pattern B, thereby preventing the display content of pattern A from being secretly photographed by a camera, thereby playing a role in preventing secret photography and privacy protection. Alternatively, the position of pattern B can be moved so that the content of a specific area of ​​pattern A can be covered to prevent the content of that area from being secretly photographed by a camera.

[0035] Specifically, the modulator is a spatial light modulator, which can adjust the phase and intensity of light in real time according to an input signal to generate a desired B pattern, and the frequency of the B pattern is greater than 1000 cycles per millimeter.

[0036] Furthermore, the human visual system has limitations on the visibility of patterns, including the ability to resolve high-frequency patterns. Generally, the frequency of high-frequency patterns that can be resolved by the human eye depends on many factors, including the level of vision, the resolution of the display device, and the optical conditions. Under the standard vision of the human eye, the frequency that can be resolved is 50-100 cycles per millimeter. The modulator is an existing spatial light modulator, referred to as SLM, which is a technology that can convert electrical signals into spatial distribution of optical signals. The transmitted pattern can be used to generate the required high-frequency pattern through the spatial light modulator, so the B pattern frequency formed by the modulator is The frequency is much greater than 100 cycles per millimeter, so the retina of the human eye will blur or become invisible to the high-frequency B pattern. Therefore, when the human eye watches the display screen, it will not affect the viewing of the A content. Before the display screen plays the picture pattern, it needs to overlap the A pattern and B pattern and play them together. Therefore, when the A picture is played, when the camera is secretly shooting, the B pattern that is invisible to the human eye will be photographed together. When the camera captures the high-frequency B pattern, when the spatial frequency of the high-frequency B pattern is close to or close to the sampling frequency of the camera sensor, moiré fringes will be generated. This is a The interference effect is manifested as periodic interference fringes in the captured image. The moiré fringes will distort the real high-frequency details in the image, causing additional interference textures or distortion in the image. If the frequency of the high-frequency B pattern exceeds the resolution range of the camera, the image may appear blurred or distorted. The insufficient resolution of the camera will cause the details of the high-frequency B pattern to be unable to be accurately presented, and the image will become unclear or blurred, thereby blocking the coverage area of ​​the A pattern. At the same time, the frame rate limit of the camera may affect the ability to capture high-frequency patterns, especially when the pattern changes rapidly. Therefore, the low-frame-rate camera cannot capture the rapidly changing high-frequency B pattern, resulting in motion blur or image distortion in the image captured by the camera. Finally, the brightness or contrast of the B pattern can be adjusted, so that the brightness and contrast of the B pattern are increased to exceed the saturation of the camera sensor. Therefore, sensor saturation will cause overexposure of the highlight area in the image, loss of details or color distortion, affecting the image quality, and failing to accurately record all light intensity information. The anti-sneak photography privacy protection of the display screen is achieved in the above manner. This method does not require the use of special equipment, such as special glasses, thereby achieving the effect of being both convenient and practical, and reducing costs.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for realizing anti-secret photography privacy protection display based on LED display screen, characterized in that: The method includes the following steps: The first step is to input the picture information and store the pictures in the display screen separately, which are divided into one picture and two pictures; The second step is to set the high frequency. The high frequency of the picture frequency is set through the modulator inside the display. The third step is to split the picture information, store the first picture as display A picture, and send the second picture to the modulator for processing; The fourth step is to generate a B picture, transmit the information of the two pictures to the modulator, process the two pictures with high frequency through the modulator, and output a B picture formed by high frequency; The fifth step is to overlap the pictures, overlapping the picture A and the picture B to form a combined picture; The sixth step is to play the pictures and play the overlapping combined pictures simultaneously.

2. According to claim 1, a method for realizing anti-secret photography privacy protection display based on LED display screen is characterized in that: The display screen is an LED display screen.

3. The method for realizing anti-secret photography privacy protection display based on LED display screen according to claim 1, characterized in that: The B pattern is used to prevent the A pattern from being secretly photographed, and the A pattern is the pattern data that needs to be displayed.

4. The method for realizing anti-secret photography privacy protection display based on LED display screen according to claim 1, characterized in that: The display ratio of the A pattern and the B pattern is 1:1, and the positions of the A pattern and the B pattern are adjacent.

5. The method for realizing anti-secret photography privacy protection display based on LED display screen according to claim 1, characterized in that: The modulator is a spatial light modulator, which can adjust the phase and intensity of light in real time according to an input signal to generate a required B pattern.

6. The method for realizing anti-secret photography privacy protection display based on LED display screen according to claim 5, characterized in that: The frequency of the B pattern is greater than 1000 cycles per millimeter.

7. The method for realizing anti-secret photography privacy protection display based on LED display screen according to claim 1, characterized in that: The B pattern is in a grid shape.

8. The method for realizing anti-secret photography privacy protection display based on LED display screen according to claim 1, characterized in that: The B pattern may also be in a corrugated shape.

Images