CN113536403A - Peep-proof display method based on visual persistence interference hiding - Google Patents
Peep-proof display method based on visual persistence interference hiding Download PDFInfo
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Abstract
The screen image to be displayed is replaced by the interference white screen at equal frame intervals, the polarizer array is covered in front of the screen of the display to enable the screen image and the polarization direction of the interference white screen to be orthogonal in a time-varying mode and hide the screen image based on a visual persistence phenomenon, screen data are specially used for a user to filter the interference white screen by using polarization glasses to read the screen image, the interference white screen and the polarization direction of the glasses are enabled to be orthogonal in a time-varying mode randomly by using a wireless communication real-time sharing synchronous modulation signal, and the peep-proof display effect that no people except the screen data specially used for the user can obtain the screen information is achieved. The invention effectively utilizes the persistence phenomenon of vision to realize the white light hiding of the screen image, can effectively prevent the screen data from being specially used for the peeping action right behind the user, further realizes the dynamically adjustable screen protection through the interaction of the wireless channel synchronous signals, and provides a simple, convenient, easy and reliable technical means for preventing the visual hackers in the mobile office environment.
Description
Technical Field
The invention belongs to the interdisciplinary field of optoelectronics, display optics, visual optics and wireless communication, in particular to an anti-peeping display technology which replaces screen images by using interference white screens at equal frame intervals, tunes the polarization direction in real time, drives orthogonal synchronization to filter the interference white screens by using polarization adjustable glasses and a key interfering the white screen direction, and prevents a peeper from seeing the screens clearly by virtue of a persistence of vision phenomenon, and particularly relates to an anti-peeping display method based on persistence of vision interference hiding.
Background
In recent years, unprotected display devices have become the primary target for visual hacking, accounting for 52% of privacy disclosure events originating from cell phone and computer screens. In view of the difficulty in working in public places and the fact that the screen data is dedicated to the user and cannot pay attention to the surrounding situation all the time, the anti-peep display technology which only allows the screen data to be read by the user has important practical value.
The peep-proof screen widely adopted at present is mainly based on the ultra-fine shutter technology, and only the screen can be seen clearly in a certain view field range in front of the display screen, and only the black screen can be seen in other positions. However, the peep-proof screen based on the ultra-fine louver technology can only realize the function of side peep-proof rather than the function of full peep-proof, and has no defense capability for peepers, cameras and telescopes with screen data specially provided for users right behind.
Disclosure of Invention
Based on the problems in the prior art, the technical problem to be solved by the invention is how to achieve the effect of preventing non-cooperative people from peeping the screen.
Aiming at the defects in the prior art, the invention aims to provide a peep-proof display method based on persistence of vision interference hiding, which is characterized in that a screen image to be displayed is randomly disassembled into two frames of complementary images, and the two frames of spatially staggered images are combined into a fuzzy image for output through dual-polarization display array display. The screen data is specially used for a user to compensate the light field difference of the two frames of images by using binocular parallax compensation glasses, so that the information acquired by two eyes can be completely synthesized into a screen image; the wireless communication means is used for sharing the key for the binocular parallax compensation glasses and the display array, so that the spatial offset of the display array can be compensated by the binocular parallax compensation glasses in real time, and the anti-peeping display effect that no one except screen data for a user can see the screen clearly is achieved.
In order to achieve the effect, the peep-proof display method based on the persistence of vision interference hiding replaces a screen image to be displayed with an interference white screen image, or inserts the interference white screen frame in the middle of the screen image frame, covers a polarizer array in front of a screen, randomly changes the polarization direction according to a frame refresh rate to ensure that the polarization directions of the screen image and the interference white screen become orthogonal in time, filters the interference white screen and clearly views the screen image through polarization glasses which are specially worn by a user by screen information, provides synchronous control for the glasses polarization and the polarizer array through a wireless communication means, and randomly adjusts the polarization directions of the polarization glasses and the interference white screen to ensure that the polarization directions of the polarization glasses and the interference white screen are orthogonal in real time;
the persistence of vision hides the screen image and replaces the screen image of every other frame with the interference white screen, or inserts the interference white screen into the screen image time sequence of the adjacent frame directly, produce the screen image and interfere the interference image that the white screen displays alternately.
Preferably, the method specifically comprises:
s101, changing a display refreshing mode, replacing a screen image to be displayed with an interference white screen according to a certain frame interval, and covering a polarizer array in front of the display to ensure that the light field polarization directions corresponding to the screen image and the interference white screen are kept orthogonal;
s102, the screen data is specially used for a user to wear the polarized glasses, the polarization direction is parallel to the screen image and orthogonal to the interference white screen, and the interference white screen is effectively filtered;
s103, the polarization controller of the polarized glasses and the polarizer array in front of the screen interact synchronous modulation signals through a wireless communication channel, so that screen data are guaranteed to be specially used for a user to see the screen all the time, and a peeper cannot know the content of the synchronous modulation signals.
Preferably, in the step S101, under the influence of persistence of vision, no matter the screen data is dedicated to the user or the viewer, the user can only see the interference image and cannot read the hidden screen image.
Preferably, the method is used for anyone to see a blurred image with an aliasing screen image and a disturbing white screen under the action of persistence of vision.
Preferably, the method specifically comprises:
generating an interference image, modifying a screen display mode through a software algorithm, replacing screen images of alternate frames with interference white screens or directly inserting the interference white screens into a time sequence of screen images of adjacent frames to generate interference images alternately displayed by the screen images and the interference white screens, and adjusting the polarization direction in real time by utilizing a polarizer array to ensure that the light field polarization directions corresponding to the screen images and the interference white screens are always orthogonal;
step two, completing the analysis and extraction of the screen image, wherein the polarization direction of the polarization glasses which are specially worn by the user is orthogonal and vertical to the polarization direction of the interference white screen, the screen image passes through the polarization glasses and the interference white screen under certain attenuation to be attenuated by the maximum extinction ratio, and the screen image can be clearly seen by the user;
and thirdly, utilizing the synchronous modulation module and the wireless communication module to randomly and synchronously adjust the polarization directions of the interference white screen and the polarized glasses in real time, so that the interference white screen and the polarized glasses are always kept in orthogonal synchronization, the polarized glasses keep the maximum value of the extinction ratio clock of the interference white screen, screen data are ensured to be specially used for a user to see the screen undisturbed all the time, a peeper always sees an interference image containing the interference white screen under the influence of a visual persistence phenomenon, and finally, an anti-peeping display effect is realized.
Preferably, the polarizer array has high transmittance in the whole visible light band, the embedded microstructures convert the transmitted light field into linear polarization, and the polarization direction can be tuned at high speed.
Preferably, the polarization glasses have a high transmittance in all visible light bands, and realize an analyzer function in which the maximum transmittance is achieved by linearly polarizing light in one direction and linearly polarizing light in the orthogonal direction is blocked by the maximum extinction ratio, and the polarization direction can be modulated.
Preferably, the synchronous modulation module embedded in the screen end or the glasses generates synchronous modulation signals in real time, and an information transmission mechanism is established through the wireless communication module to distribute random number sequences for the polarizer array and the polarized glasses; the polarizer array reads the random number sequence, compiles the random number sequence into a polarization direction distribution sequence according to a certain rule, and controls the polarization direction of the interference white screen.
The system for realizing the peep-proof display method based on the persistence of vision interference hiding comprises a polarizer array, a display, polarized glasses, a synchronous modulation module, a wireless communication module, an interference image generation module, a screen image analysis and extraction module and a polarization direction orthogonal synchronization module, wherein,
the interference image generation module is used for replacing a screen image to be displayed with an interference white screen image, or inserting an interference white screen frame in the middle of the screen image frame, covering a polarizer array in front of the screen, and randomly changing the polarization direction according to the frame refresh rate to ensure that the polarization directions of the screen image and the interference white screen become orthogonal in time varying mode;
the screen image analyzing and extracting module is used for filtering interference white screens and clearly seeing the screen images through polarized glasses which are specially worn by a user through screen data;
and the polarization direction orthogonal synchronization module is used for providing synchronous control for the glasses polarization and the polarizer array through a wireless communication means, and randomly adjusting the polarization directions of the polarization glasses and the interference white screen to ensure that the polarization glasses and the interference white screen are orthogonal in real time.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the above-mentioned method.
A computer program product comprising computer programs/instructions which, when executed by a processor, implement the steps of the above-described method.
The invention effectively utilizes the persistence phenomenon of vision to realize the white light hiding of the screen image, can effectively prevent the screen data from being specially used for the peeping action right behind the user, further realizes the dynamically adjustable screen protection through the interaction of the wireless channel synchronous signals, and provides a simple, convenient, easy and reliable technical means for preventing the visual hackers in the mobile office environment.
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In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a schematic view of the working principle of the peep-proof display based on the disturbance hiding of persistence of vision.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The invention provides an embodiment of a peep-proof display method based on persistence of vision interference hiding, which is characterized in that an interference white screen image is used for replacing a screen image to be displayed, or an interference white screen frame is inserted in the middle of a screen image frame, a polarizer array is covered in front of a screen, the polarization direction is randomly changed according to a frame refresh rate so that the polarization directions of the screen image and the interference white screen become orthogonal in time, the interference white screen is filtered and seen clearly through polarization glasses which are specially worn by a user through screen data, synchronous control is provided for the polarization of the glasses and the polarizer array through a wireless communication means, and the polarization directions of the polarization glasses and the interference white screen are randomly adjusted so that the polarization directions of the polarization glasses and the interference white screen are orthogonal in real time.
The invention provides an embodiment of a peep-proof display method based on persistence of vision interference hiding, which specifically comprises the following steps:
s101, firstly, generating an interference image, namely replacing a screen image to be displayed with the interference white screen image (the frame refresh rate is not changed at this moment), or inserting the interference white screen frame in the middle of the screen image frame (the frame refresh rate is doubled at this moment), covering a polarizer array in front of a screen, and randomly changing the polarization direction according to the frame refresh rate to ensure that the polarization directions of the screen image and the interference white screen become orthogonal when time goes wrong;
s102, analyzing and extracting the screen image, namely filtering interference white screen and clearly seeing the screen image through polarized glasses which are specially worn by a user through screen data;
s103, orthogonal synchronization of polarization directions, namely, synchronous control is provided for the glasses polarization and the polarizer array through a wireless communication means, the polarization directions of the polarization glasses and the interference white screen are randomly adjusted to enable the polarization glasses and the interference white screen to be orthogonal in real time, at the moment, screen data are specially used for a user to see display information all the time without interference, and a peeper cannot read the display information under the influence of the interference white screen changing in polarization.
The invention provides an embodiment of a peep-proof display method based on persistence of vision interference hiding, which comprises the following steps:
s1, repeatedly displaying an image to be displayed on a screen according to a certain frame updating rate, and replacing the image to be displayed by an interference white screen or other interference pictures according to the sequence of every other frame, wherein the frame updating rate is kept unchanged; or the interference white screen is inserted into the middle of the adjacent frames of the screen image, and the frame updating rate is doubled at the moment;
s2, covering a polarizer array in front of the screen, and modulating the polarization direction according to the frame update rate to enable the polarization direction of the screen image to be orthogonal to the polarization direction of the interference white screen adjacent to the screen image;
s3, continuously projecting interference images including screen images and interference white screens;
s4, the screen data is specially used for the user to wear the polarized glasses, and the polarization direction is orthogonal to the polarization direction of the interference white screen and parallel to the polarization direction of the screen image.
S5, a synchronous modulation module generates synchronous modulation signals, wherein one path of signals is compiled and converted into interference white screen polarization directions which are randomly distributed; and the other path of the interference signal is sent to the polarized glasses through the wireless communication module and is compiled and converted into the orthogonal direction of the interference white screen polarization direction.
And S6, the synchronous modulation module is continuously updated, and the polarization directions of the interference white screen and the polarization glasses are randomly changed but always kept orthogonal.
In some embodiments, the screen data is dedicated for the user to see the screen image clearly all the time, and the viewer can only see the interference image under the influence of the persistence of vision; even if a peeper can filter the interference white screen by using the analyzer, the orthogonal synchronization with the polarization direction of the interference white screen cannot be kept due to the loss of the synchronous modulation link, namely, clear screen images cannot be stably seen for a long time.
As shown in fig. 1, the present invention provides an embodiment of a peep-proof display method based on persistence of vision interference concealment, which shows a peep-proof display principle of a peep-proof display technology based on persistence of vision interference concealment:
1. repeatedly displaying the image to be displayed on the screen according to a certain frame updating rate, and replacing the image to be displayed by the interference white screen (or other interference pictures) according to the sequence of every other frame, wherein the frame updating rate is kept unchanged; or the interference white screen is inserted into the middle of the adjacent frames of the screen image, and the frame updating rate is doubled at the moment;
2. covering a polarizer array in front of the screen, and modulating the polarization direction according to the frame update rate to ensure that the polarization direction of the screen image is orthogonal to the polarization direction of the interference white screen adjacent to the screen image;
3. continuously displaying the interference images (i.e. screen image and interference white screen), no matter the screen data is dedicated to the user or peep to see the screen content;
4. the screen data is specially used for the user to wear the polarized glasses, the polarization direction is orthogonal to the polarization direction of the interference white screen (namely parallel to the polarization direction of the screen image), the interference white screen is restrained by the maximum extinction ratio, and the screen data is specially used for the user to clearly see the screen image;
5. the synchronous modulation module generates synchronous modulation signals, wherein one path of signals is compiled and converted into interference white screen polarization directions which are randomly distributed; the other path is sent to the polarized glasses through the wireless communication module and is converted into the orthogonal direction interfering the polarization direction of the white screen through compiling; the synchronous modulation module is updated continuously, and the polarization directions of the interference white screen and the polarization glasses are changed randomly but are always kept orthogonal. At this time, the screen data is dedicated for the user to see the screen image clearly all the time, and the peeper can only see the interference image under the influence of the persistence of vision; even if a peeper can filter the interference white screen by using the analyzer, the orthogonal synchronization with the polarization direction of the interference white screen cannot be kept due to the loss of the synchronous modulation link, namely, clear screen images cannot be stably seen for a long time.
The invention provides an embodiment of a peep-proof display method based on persistence of vision interference hiding, which comprises the following steps:
s101, generating an interference image, modifying a screen display mode through a software algorithm, replacing screen images of alternate frames with interference white screens, or directly inserting the interference white screens into a time sequence of screen images of adjacent frames to generate interference images alternately displayed by the screen images and the interference white screens, and adjusting the polarization direction in real time by utilizing a polarizer array to ensure that the light field polarization directions corresponding to the screen images and the interference white screens are always orthogonal;
s102, analyzing and extracting the screen image, wherein the polarization direction of the polarization glasses worn by the user is orthogonal and vertical to the polarization direction of the interference white screen, the screen image passes through the polarization glasses and the interference white screen under certain attenuation to be attenuated by the maximum extinction ratio, and the screen image can be clearly seen by the user;
s103, the synchronous modulation module and the wireless communication module are utilized to randomly and synchronously adjust the polarization directions of the interference white screen and the polarized glasses in real time, so that the interference white screen and the polarized glasses are always kept in orthogonal synchronization, namely, the polarized glasses keep the maximum value of the extinction ratio clock of the interference white screen, screen data are ensured to be specially used for a user to see the screen undisturbed all the time, a peeper always sees an interference image containing the interference white screen under the influence of a visual persistence phenomenon, and finally, the peep-proof display effect is achieved.
The invention provides an embodiment of a peep-proof display method based on visual persistence interference hiding, which is characterized in that an interference white screen is used for replacing a screen image to be displayed at equal frame intervals, a polarizer array is covered in front of a display screen to enable the screen image and the polarization direction of the interference white screen to be orthogonal in a time-varying mode and hide the screen image based on the visual persistence phenomenon, screen data are specially used for a user to filter the interference white screen by using polarization glasses to read the screen image, the interference white screen and the polarization direction of glasses are enabled to be orthogonal in a time-varying mode randomly by using a wireless communication real-time sharing synchronous modulation signal, and the peep-proof display effect that no one except the screen data is specially used for the user can not obtain the screen information is achieved.
In some embodiments, the persistence-of-vision hiding screen image replaces screen images of alternate frames with the disturbing white screen, or directly inserts the disturbing white screen into the time series of screen images of adjacent frames, to generate a disturbing image in which the screen images and the disturbing white screen are alternately displayed, and when anyone sees under the effect of persistence of vision, a blurred image in which the screen images and the disturbing white screen are aliased.
In some embodiments, the interference white screen can be replaced by other interference pictures, without limiting the specific means for modifying the screen display mode and without limiting the specific technical parameters such as the frame update rate and the insertion position of the interference white screen.
In some embodiments, the polarizer array has high transmittance in the whole visible light band, the embedded microstructures convert the transmitted light field into linear polarization, the polarization direction can be tuned at high speed, and the substrate material, the microstructures, the regulation and control mode and the transmittance parameters of the polarizer are not limited.
In some embodiments, the polarized glasses have higher transmittance in the whole visible light band, and can realize the function of an analyzer, namely, the highest transmittance passes through a certain direction of linear polarization, the highest extinction ratio blocks the linear polarization in the orthogonal direction, and the polarization direction can be modulated.
In some embodiments, the polarized eyewear materials include, but are not limited to, liquid crystals, titanium dioxide, and other visible band high transmittance two-dimensional layered materials, and the polarization modulation driving means include, but are not limited to, electro-optical, thermo-optical means.
In some embodiments, a synchronous modulation module embedded in the screen end or in the glasses in the synchronous modulation generates synchronous modulation signals in real time, and an information transmission mechanism is established through the wireless communication module to distribute random number sequences for the polarizer array and the polarized glasses.
In some embodiments, the polarizer array in synchronous modulation reads the random number sequence, compiles the random number sequence into a polarization direction distribution sequence according to a certain rule, and controls the polarization direction of the interference white screen.
In some embodiments, the polarization glasses in synchronous modulation read the random number sequence, compile the random number sequence into a polarization direction distribution sequence according to a corresponding rule, and control the polarization direction.
In some embodiments, the interference white screen and the polarization direction of the polarization glasses are controlled to randomly change in real time and keep orthogonal and vertical all the time through real-time synchronous modulation in synchronous modulation.
In some embodiments, the synchronous modulation and wireless communication specific implementation, protocol type, interface definition, refresh frequency, etc. are not limited. The specific implementation of the system-wide clock synchronization is not limited.
The invention provides a system embodiment for realizing the peep-proof display method based on the persistence of vision interference hiding, which comprises a polarizer array, a display, polarized glasses, a synchronous modulation module, a wireless communication module, an interference image generation module, a screen image analysis and extraction module and a polarization direction orthogonal synchronization module, wherein,
the interference image generation module is used for replacing a screen image to be displayed with an interference white screen image, or inserting an interference white screen frame in the middle of the screen image frame, covering a polarizer array in front of the screen, and randomly changing the polarization direction according to the frame refresh rate to ensure that the polarization directions of the screen image and the interference white screen become orthogonal in time varying mode;
the screen image analyzing and extracting module is used for filtering interference white screens and clearly seeing the screen images through polarized glasses which are specially worn by a user through screen data;
and the polarization direction orthogonal synchronization module is used for providing synchronous control for the glasses polarization and the polarizer array through a wireless communication means, and randomly adjusting the polarization directions of the polarization glasses and the interference white screen to ensure that the polarization glasses and the interference white screen are orthogonal in real time.
The invention also provides an embodiment of a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the above-mentioned method.
The invention also provides an embodiment of a computer program which, when executed by a processor, implements the above method.
Compared with the prior art, the invention has the following advantages:
firstly, the invention provides an anti-peeping display technology capable of working for a long time, and provides a long-acting screen protection mechanism for screen data special for users;
secondly, the invention solves the technical shortages of the traditional peep-proof display technology in the aspects of peepers, cameras, telescopes and the like right behind the protective screen;
thirdly, the invention further reduces the possibility that a peeper reads screen information through an analyzer by orthogonal synchronization of the polarization glasses and the interference white screen;
in addition, the invention effectively utilizes the phenomenon of persistence of vision, and only needs simple operations of modifying a screen display mode through software, modulating a polarizer array at a low speed, realizing clock synchronization and key distribution through wireless communication and the like to finish peep-proof display, thereby providing important thought reference for peeping and blackening of electronic equipment in a mobile office environment.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, 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 disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A peep-proof display method based on visual persistence interference hiding replaces a screen image to be displayed with an interference white screen image, or an interference white screen frame is inserted in the middle of the screen image frame, a polarizer array covers the front of a screen, the polarization direction is randomly changed according to a frame refresh rate to enable the polarization direction of the screen image and the polarization direction of the interference white screen to become orthogonal in time varying mode, the interference white screen is filtered and clearly seen through polarization glasses which are specially worn by a user through screen information, synchronous control is provided for the polarization of the glasses and the polarizer array through a wireless communication means, and the polarization directions of the polarization glasses and the interference white screen are randomly adjusted to enable the polarization directions of the polarization glasses and the interference white screen to be orthogonal in real time;
the persistence of vision hides the screen image and replaces the screen image of every other frame with the interference white screen, or inserts the interference white screen into the screen image time sequence of the adjacent frame directly, produce the screen image and interfere the interference image that the white screen displays alternately.
2. The peep-proof display method based on persistence of vision interference concealment according to claim 1, comprising:
s101, changing a display refreshing mode, replacing a screen image to be displayed with an interference white screen according to a certain frame interval, and covering a polarizer array in front of the display to ensure that the light field polarization directions corresponding to the screen image and the interference white screen are kept orthogonal;
s102, the screen data is specially used for a user to wear the polarized glasses, the polarization direction is parallel to the screen image and orthogonal to the interference white screen, and the interference white screen is effectively filtered;
s103, the polarization controller of the polarized glasses and the polarizer array in front of the screen interact synchronous modulation signals through a wireless communication channel, so that screen data are guaranteed to be specially used for a user to see the screen all the time, and a peeper cannot know the content of the synchronous modulation signals.
3. The anti-peeping display method according to claim 2, wherein the step S101 is performed under the influence of persistence of vision, whether the screen data is dedicated to the user or the peeper can only see the interference image and cannot read the screen image hidden therein.
4. The privacy-preserving display method based on persistence of vision interference concealment according to claim 1, wherein the blurred image obtained by aliasing the screen image and the interference white screen is seen by anyone under the effect of persistence of vision.
5. The peep-proof display method based on persistence of vision interference concealment according to claim 1 or 2, comprising:
generating an interference image, modifying a screen display mode through a software algorithm, replacing screen images of alternate frames with interference white screens or directly inserting the interference white screens into a time sequence of screen images of adjacent frames to generate interference images alternately displayed by the screen images and the interference white screens, and adjusting the polarization direction in real time by utilizing a polarizer array to ensure that the light field polarization directions corresponding to the screen images and the interference white screens are always orthogonal;
step two, completing the analysis and extraction of the screen image, wherein the polarization direction of the polarization glasses which are specially worn by the user is orthogonal and vertical to the polarization direction of the interference white screen, the screen image passes through the polarization glasses and the interference white screen under certain attenuation to be attenuated by the maximum extinction ratio, and the screen image can be clearly seen by the user;
and thirdly, utilizing the synchronous modulation module and the wireless communication module to randomly and synchronously adjust the polarization directions of the interference white screen and the polarized glasses in real time, so that the interference white screen and the polarized glasses are always kept in orthogonal synchronization, the polarized glasses keep the maximum value of the extinction ratio clock of the interference white screen, screen data are ensured to be specially used for a user to see the screen undisturbed all the time, a peeper always sees an interference image containing the interference white screen under the influence of a visual persistence phenomenon, and finally, an anti-peeping display effect is realized.
6. The privacy-preserving display method based on persistence of vision interference concealment according to claim 1, wherein the polarizer array has high transmittance in the whole visible light band, the embedded microstructures convert the transmitted light field into linear polarization, and the polarization direction can be tuned at high speed.
7. The peep-proof display method based on persistence of vision interference hiding according to claim 1, wherein the polarized glasses have high transmittance in the whole visible light band, and the polarization direction can be modulated by realizing the function of an analyzer, that is, the highest transmittance passes through a certain direction of linear polarization and the highest extinction ratio blocks the orthogonal direction of linear polarization.
8. The peep-proof display method based on persistence of vision interference concealment according to claim 1, wherein the synchronous modulation module embedded in the screen end or in the glasses generates synchronous modulation signals in real time, and establishes an information transmission mechanism through the wireless communication module to distribute random number sequences for the polarizer array and the polarized glasses; the polarizer array reads the random number sequence, compiles the random number sequence into a polarization direction distribution sequence according to a certain rule, and controls the polarization direction of the interference white screen.
9. A system for realizing the peep-proof display method based on persistence of vision interference hiding according to claims 1-8, comprising a polarizer array, a display, polarized glasses, a synchronous modulation module and a wireless communication module, and further comprising an interference image generation module, a screen image analysis and extraction module and a polarization direction orthogonal synchronization module, wherein,
the interference image generation module is used for replacing a screen image to be displayed with an interference white screen image, or inserting an interference white screen frame in the middle of the screen image frame, covering a polarizer array in front of the screen, and randomly changing the polarization direction according to the frame refresh rate to ensure that the polarization directions of the screen image and the interference white screen become orthogonal in time varying mode;
the screen image analyzing and extracting module is used for filtering interference white screens and clearly seeing the screen images through polarized glasses which are specially worn by a user through screen data;
and the polarization direction orthogonal synchronization module is used for providing synchronous control for the glasses polarization and the polarizer array through a wireless communication means, and randomly adjusting the polarization directions of the polarization glasses and the interference white screen to ensure that the polarization glasses and the interference white screen are orthogonal in real time.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method of any one of claims 1 to 8.
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