CN107680543B - Anti-peeping security display method, security display method with anti-cheating effect and security display system - Google Patents
Anti-peeping security display method, security display method with anti-cheating effect and security display system Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract
The invention provides a peep-proof safety display method, which comprises the following steps: receiving a secret image to generate an auxiliary image, alternately displaying the secret image and the auxiliary image at a fixed refresh frequency through a display module to present a pure-color gray image seen by naked eyes, and controlling the opening and closing of a shutter type synchronous glasses at the same frequency to capture the secret image only. The invention also provides a safety display method with an anti-counterfeiting effect, which comprises the following steps: receiving an initial secret image and a camouflage image, generating a secret image and an auxiliary image by utilizing a gamma conversion and brightness modulation method, alternately displaying the secret image and the auxiliary image at a fixed refreshing frequency through a display module to present a camouflage image seen by naked eyes, and controlling the opening and closing of a shutter type synchronous glasses at the same frequency as the display module to capture only the secret image. The invention also provides a safety display system.
Description
Technical Field
The present invention relates to the field of security display, and in particular, to a security display method for preventing peeping, a security display method with an anti-spoofing effect, and a security display system.
Background
Currently, human society has entered the information age, and information has become an indispensable important component in our lives. But the acquisition, grasping and processing of information is not free from the increasingly advanced display technology. Current mainstream display technologies include: liquid Crystal Display (LCD), organic light-Emitting Diode (OLED), and projection Display (LCD). Among them, the LCD is the most popular display technology in the present day due to its advantages of high technology maturity and low manufacturing cost; the OLED has been widely paid attention and supported in recent years, and has outstanding advantages in terms of display effect and power consumption due to its extremely high contrast ratio due to its self-luminous property; the projection display technology is mainly suitable for public occasions due to high brightness and convenient carrying.
Display devices are currently the main way for people to obtain information. Information leakage caused by peeping and peeping of the display device brings serious threats to personal privacy protection and national security, so that the safety display device with the peeping prevention function has wide market demands in occasions with high security requirements.
The current mainstream security display system is mainly based on the improvement of the liquid crystal display panel. An early anti-peeping liquid crystal display system is shown in fig. 1, and includes a liquid crystal panel 101 and polarized glasses 102. Wherein the liquid crystal panel 101 includes: a backlight 1011, a polarizer 1012, and a liquid crystal layer 1013, which are sequentially stacked. The polarizing axes of the polarizing glasses 102 and the polarizer 1012 are perpendicular to each other. Compared with the conventional liquid crystal display, the liquid crystal panel 101 has only a lower polarizer and lacks an upper polarizer, so that the display system is white when viewed by naked eyes, and display information can be acquired only when the polarized glasses 102 are worn. The system is only suitable for wearing polarized glasses, and can not meet the requirements of common working people, so that the application range is narrow.
In order to meet two requirements of common display and safe display of a display, a Chinese patent with the patent application number of 2016108848732, namely 'peep-proof liquid crystal display panel and working method thereof', invents a multifunctional peep-proof liquid crystal display system. As shown in fig. 2, the system includes a two-layer liquid crystal display panel 201 and polarized glasses 202. Wherein the double-layer liquid crystal display panel 201 includes: a backlight 2011, a first polarizer 2012, a first liquid crystal layer 2013, a second polarizer 2014 and a second liquid crystal layer 2015 which are sequentially overlapped together. In the normal display mode, the backlight 2011, the first polarizer 2012, the first liquid crystal layer 2013 and the second polarizer 2014 form a conventional liquid crystal display panel, and the second liquid crystal layer 2015 does not affect the brightness of the bottom layer, so that the general population can view display information without wearing polarized glasses. In the secure display mode, the second polarizer 2014 allows all light passing through the first liquid crystal layer 2013 to pass through, so that the display system is white in a naked eye state; the polarization axes of the second polarizer 2014 and the polarized glasses 202 are perpendicular to each other, and the polarization direction of the bottom light is controlled by the second liquid crystal layer 2015, so that only the user wearing the polarized glasses can obtain the display information. The system can simultaneously meet two requirements of common display and safe display, but the display system uses double-layer liquid crystal, the manufacturing process is complex, and the cost is increased.
Disclosure of Invention
The invention aims to provide a peep-proof safety display method, which generates a pure-color gray image under the effect of persistence of vision through the generated auxiliary image and the secret image, and plays a role in peep-proof safety display. And a security display method with a spoofing effect is also provided, wherein a designated disguised image is generated under the persistence of vision effect through the generated auxiliary image and the secret image, so that the security display effect of a spoofed peeper is realized. The display system has the advantages that the safety requirement of peeping prevention can be met, the effect of deceiving a peeper can be achieved by providing a camouflage image, the safety of the display system is further enhanced, complex processes such as double-layer liquid crystal are not needed, and the manufacturing cost is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
a peep-proof safety display method comprises the following steps:
receiving a secret image to be protected;
generating an auxiliary image according to the secret image;
alternately displaying the secret image and the auxiliary image at a fixed refreshing frequency through a display module to present a pure-color gray image seen by naked eyes;
a shutter type synchronous glasses controls opening and closing at the same frequency as the display module to capture only the secret image.
Further, the shutter type synchronization glasses maintain the same frequency as the display module according to a synchronization signal.
Further, the algorithm for generating the auxiliary image is a ═ 1-Sγ)1/γWhere A is the auxiliary image, S is the secret image, and γ is the gamma value of the display module.
Further, the frequency is greater than or equal to 120 Hz.
A method for displaying security with spoofing effect, comprising the steps of:
receiving an initial secret image to be protected and a disguised image;
generating a secret image and an auxiliary image by utilizing a gamma conversion and brightness modulation method according to the initial secret image and the camouflage image;
alternately displaying the secret image and the auxiliary image at a fixed refreshing frequency through a display module to present a disguised image seen by naked eyes;
a shutter type synchronous glasses controls opening and closing at the same frequency as the display module to capture only the secret image.
Further, the shutter type synchronization glasses maintain the same frequency as the display module according to a synchronization signal.
Further, the steps of the gamma conversion and brightness modulation method include:
the initial secret image and the camouflage image are gamma-transformed from a grey-scale view to a luminance view SL、MLThe formula is as follows: sL＝Sγ，ML＝Mγ(ii) a Wherein S is an initial secret image, M is a camouflage image, and gamma is a gamma value of the display module;
the luminance view S with luminance space at (0,1)L、MLTransformation by luminance space into luminance view S 'with luminance space located at (1/3, 2/3)'L、M′L；
Generating a luminance view A of the auxiliary image by a luminance differenceL＝2M′L-S′L；
The brightness view S'LAnd ALGenerating the brightness modulated secret image and the auxiliary image by an inverse gamma transformation, by the formula: s '(S)'L)1/γ，A＝(AL)1/γ(ii) a Where S' is the secret image and A is the auxiliary image.
Further, the frequency is greater than or equal to 120 Hz.
A secure display system comprising a display body and shutter-type synchronization glasses, the display body comprising:
the mode control module is used for selecting a peep-proof display mode or a camouflage display mode;
the image input module controls the input of the display image according to the mode selected by the mode control module;
the image processing module is used for carrying out corresponding image processing on the display image according to the mode selected by the mode control module;
the signal synchronization module transmits a synchronization signal according to the mode selected by the mode control module;
the display module is a Liquid Crystal Display (LCD), an organic light emitting diode display (OLED) or a projector device with the refreshing frequency of more than or equal to 120 Hz;
the shutter type synchronous glasses receive the synchronous signals sent by the signal synchronization module so as to control the opening and closing of the lenses.
Further, the two-sided lenses of the shutter type synchronous glasses have the same synchronous mode.
Further, the mode control module is also used for selecting a common display mode.
According to the anti-peeping safe display method, the auxiliary image is generated and alternately displayed on the display module and the secret image according to a certain refreshing frequency, so that a pure-color gray image can be observed by naked eyes, and the effect of superposition of the secret image and the auxiliary image under the effect of human eye visual persistence is substantial; when the synchronous glasses are worn, the protected secret image can be watched, so that the watching is not influenced, the peeping of other people can be prevented, and the purpose of safe display is achieved.
The secure display method with the spoofing effect provided by the invention generates the alternate display of the secret image and the auxiliary image at a certain refreshing frequency by processing the initial secret image and the camouflage image, so that a given camouflage image can be observed by naked eyes of people, and the secure display method with the spoofing effect is the superposition effect of the secret image and the auxiliary image after brightness modulation under the visual persistence effect of human eyes; when the synchronous glasses are worn, the secret image after brightness modulation can be watched, so that the watching is not influenced, and other people can be deceived visually by using the camouflage image, and the purpose of safe display is achieved.
The safety display system provided by the invention can meet the common display requirement and can realize the safety requirement of peeping prevention by selecting three modes, can provide a camouflage image to realize the effect of deceiving a peeper, further enhances the safety of the display system, does not need to use complex processes such as double-layer liquid crystal and the like, and reduces the manufacturing cost.
Drawings
Fig. 1 is a schematic structural diagram of a conventional peep-proof liquid crystal display system in the prior art.
Fig. 2 is a schematic structural diagram of a double-layer peep-proof liquid crystal display system improved in the prior art.
Fig. 3 is a flow chart of a peep-proof security display method according to the present invention.
Fig. 4 is a flowchart illustrating a security display method with spoofing according to the present invention.
FIG. 5 is a flow chart of a gamma conversion and brightness modulation method.
Fig. 6 is a schematic structural diagram of the security display system of the present invention.
Detailed Description
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
The present embodiment provides a peep-proof security display method, and fig. 3 is a flowchart thereof, including the steps of:
1) receiving a secret image S to be protected;
2) using A ═ 1-S from the secret image Sγ)1/γGenerating an auxiliary image A;
3) alternately displaying the secret image and the auxiliary image through a display module at a fixed refresh frequency which is greater than or equal to 120Hz to present a pure-color gray image seen by naked eyes;
4) a shutter type synchronous glasses keeps controlling opening and closing at the same frequency according to a synchronous signal to capture only the secret image S information.
The present embodiment further provides a method for displaying security with spoofing effect, and fig. 4 is a flowchart thereof, including the steps of:
1) receiving an initial secret image S to be protected and a disguised image M;
2) generating a secret image S' and an auxiliary image A by utilizing a gamma conversion and brightness modulation method according to the initial secret image S and the camouflage image M;
3) alternately displaying the secret image S 'and the auxiliary image A through a display module at a fixed refresh frequency which is greater than or equal to 120Hz to present a disguised image M' seen by naked eyes;
4) a shutter type synchronous glasses controls opening and closing at the same frequency according to a synchronous signal to capture only the secret image S' information.
The above method for generating the secret image S' and the auxiliary image a by using the gamma conversion and the brightness modulation method according to the initial secret image S and the disguised image M is shown in fig. 5, and comprises the following steps:
1) the initial secret image S and the camouflage image M are converted from a gray level view to a brightness view through gamma conversion, SL＝Sγ，ML＝MγWherein γ is a gamma value of the display device;
2) luminance view S with luminance space at (0,1)L,MLLuminance spatial transformation to a luminance view S 'with luminance space located at (1/3, 2/3)'L,M′L；
3) Then generating a brightness view A of the auxiliary image through brightness differenceL＝2M′L-S′L；
4) Finally, luminance view S'LAnd ALGenerating a brightness modulated secret image S 'and an auxiliary image A through inverse gamma conversion, wherein the formula is S ═ S'L)1/γ，A＝(AL)1/γ(ii) a The secret image S 'and the auxiliary image a can be recognized as the luminance-modulated disguised image M' by human eyes under the persistence of vision effect, thereby realizing an effect of spoofing a peeper.
The embodiment further provides a security display system, which has anti-peeping and anti-spoofing effects, and the structure of the security display system is as shown in fig. 6, including: a display main body 301 and shutter type synchronization glasses 302. Wherein the display main body 302 includes:
the mode control module is used for selecting a common display mode, an anti-peeping display mode or a disguised display mode;
an image input module for controlling the input of the display image according to the mode selected by the mode control module;
the image processing module is used for carrying out corresponding processing on the display image according to the mode selected by the mode control module;
a signal synchronization module, which transmits synchronization signals according to the mode selected by the mode control module; the display module can be an LCD, OLED or projector device with a refresh frequency of 120Hz or more.
The shutter-type synchronous glasses 302 receive the synchronous signal sent from the signal synchronization module and control the opening and closing of the lenses, wherein the two lenses have the same synchronization mode, i.e. open simultaneously or close simultaneously.
The system can realize the anti-peeping safety display effect by combining the anti-peeping safety display method, and the working process is as follows:
1) when the mode control module selects the peep-proof display mode;
2) the image input module controls to input the protected secret image S;
3) the image processing module generates an auxiliary image A (1-S) by calculation according to the secret image Sγ)1/γGamma is the gamma value of the display equipment, and S and A are sent to the display module;
4) the display module drives the LCD, the OLED or the projection equipment to display in turn according to the sequence by the S and the A at a fixed refreshing frequency f which is more than or equal to 120 Hz;
5) the signal synchronization module sends a synchronization signal at the same frequency f as the display device;
6) the shutter type synchronous glasses receive the synchronous signal, drive the glasses to open and close at the frequency f, allow the secret image S to pass through, and prevent the auxiliary image A from passing through.
In this mode: the secret image S and the auxiliary image A are superposed into a pure-color gray image under the effect of human eye visual persistence, so that secret information cannot be observed under the condition of naked eyes of a person; while the secret image S can be viewed from the display when acted upon by the synchronization glasses 302.
The system can realize the safety display effect of the cheating by combining the safety display method with the cheating effect, and the working process is as follows:
1) when the mode control module selects the disguised display mode;
2) the image input module controls and inputs a protected initial secret image S and an image M for disguised display; the image processing module calculates and generates a secret image S 'and an auxiliary image A which are subjected to brightness modulation according to the initial secret image S and the camouflage image M, and sends the secret image S' and the auxiliary image A to the display module;
3) the display module drives the LCD, the OLED or the projection equipment to display the secret image S' and the auxiliary image A alternately according to the sequence by a fixed refreshing frequency f which is more than or equal to 120 Hz;
4) the signal synchronization module sends a synchronization signal at the same frequency f as the display device;
5) the shutter type synchronous glasses receive the synchronous signal, drive the glasses to open and close at the frequency f, allow S' to pass through and prevent A from passing through.
In this mode: the brightness modulated camouflage image information can be observed from the display main body under the condition of naked eyes, and is substantially the superposition effect of S' and A under the effect of human visual persistence; when the synchronous glasses are worn, the secret image information S' after brightness modulation can be viewed from the display.
In addition, the system also provides a common display function, and the working process is as follows:
1) the mode control module selects a common display mode;
2) the image input module controls to input and display an image S;
3) the image processing module sends the display image S to the display module;
4) the display module drives an LCD, an OLED or a projection device to display at a normal refreshing frequency;
5) the signal synchronization module does not send a synchronization signal;
6) shutter-type synchronous glasses allow all light signals to pass through.
In this mode: the shutter type synchronous glasses can be worn by people and the same display information can be observed from the display main body under the condition of naked eyes, and the shutter type synchronous glasses are suitable for the condition that images do not need to be protected and are peeped.
The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and a person skilled in the art can modify the technical solution of the present invention or substitute the same without departing from the spirit and scope of the present invention, and the scope of the present invention should be determined by the claims.
Claims (5)
1. A method for displaying security with spoofing effect, comprising the steps of:
receiving an initial secret image to be protected and a disguised image;
generating a secret image and an auxiliary image by utilizing a gamma conversion and brightness modulation method according to the initial secret image and the camouflage image;
alternately displaying the secret image and the auxiliary image at a fixed refreshing frequency through a display module to present a disguised image seen by naked eyes;
a shutter type synchronous glasses controls opening and closing at the same frequency as the display module to capture only the secret image.
2. The method as claimed in claim 1, wherein the shutter-type glasses maintain the same frequency as the display module according to a synchronization signal.
3. The method as claimed in claim 1, wherein the gamma conversion and brightness modulation method comprises:
the initial secret image and the camouflage image are gamma-transformed from a grey-scale view to a luminance view SL、MLThe formula is as follows: sL＝Sγ，ML＝Mγ(ii) a Where S is the initial secret image, M is the camouflage image, and γ is the displayGamma value of the module;
the luminance view S with luminance space at (0,1)L、MLTransformation by luminance space into luminance view S 'with luminance space located at (1/3, 2/3)'L、M′L；
Generating a luminance view A of the auxiliary image by a luminance differenceL＝2M′L-S′L；
The brightness view S'LAnd ALGenerating the brightness modulated secret image and the auxiliary image by an inverse gamma transformation, by the formula: s '(S)'L)1/γ，A＝(AL)1/γ(ii) a Where S' is the secret image and A is the auxiliary image.
4. The method as claimed in claim 1, wherein the frequency is 120Hz or higher.
5. A secure display system comprising a display body and shutter-type synchronization glasses, the display body comprising:
the mode control module is used for selecting an anti-peeping display mode or a disguising display mode and selecting a common display mode;
the image input module is used for controlling and inputting the protected secret image S when the image input module is in the peep-proof display mode; when in the disguised display mode, the control device is used for controlling and inputting a protected initial secret image S and an image M for disguised display; when in the normal display mode, the display control module is used for controlling the input of the display image S;
the image processing module is used for calculating and generating an auxiliary image A according to the secret image S when the image processing module is in the peep-proof display mode; when in the disguised display mode, the device is used for calculating and generating a secret image S' and an auxiliary image A which are subjected to brightness modulation according to the initial secret image S and the disguised image M; when the display module is in the common display mode, the display module is used for sending the display image S to the display module;
the signal synchronization module is used for sending a synchronization signal at the same frequency f as the display equipment when the display equipment is in the peep-proof display mode or the camouflage display mode; when in the normal display mode, the device is used for not sending the synchronous signal;
the display module is used for driving the LCD, the OLED or the projection equipment to display in turn according to the sequence by using the S and the A at a fixed refreshing frequency f which is more than or equal to 120Hz in an anti-peeping display mode; when the device is in the disguised display mode, the device is used for driving the LCD, the OLED or the projection equipment to display the secret image S' and the auxiliary image A in turn according to the sequence by the fixed refreshing frequency f which is more than or equal to 120 Hz; when the display device is in the common display mode, the display device is used for driving the LCD, the OLED or the projection device to display at a normal refreshing frequency;
when the system is in the peep-proof display mode, the shutter type synchronous glasses receive the synchronous signals, drive the glasses to open and close at the frequency f, allow the secret image S to pass through and prevent the auxiliary image A from passing through; when the glasses are in a camouflage display mode, the shutter type synchronous glasses receive the synchronous signals, drive the glasses to open and close at the frequency f, allow S' to pass through and prevent A from passing through; when in the normal display mode, the shutter-type synchronous glasses allow all light signals to pass through.
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| CN109543474A (en) * | 2018-11-30 | 2019-03-29 | 努比亚技术有限公司 | A kind of method for controlling mobile terminal and mobile terminal |
| CN111312073B (en) * | 2020-02-25 | 2022-08-12 | 深圳市隆利科技股份有限公司 | Peep-proof display screen and electronic equipment |
| CN112599079A (en) * | 2020-12-17 | 2021-04-02 | 郑州胜龙信息技术股份有限公司 | Display information protection method and LED display system |
| CN112599068A (en) * | 2020-12-17 | 2021-04-02 | 王鹏 | White display control method of color display screen |
| CN112687240A (en) * | 2020-12-18 | 2021-04-20 | 郑州胜龙信息技术股份有限公司 | Display information protection method, display and display equipment |
| CN113268786B (en) * | 2021-07-19 | 2022-02-25 | 军事科学院系统工程研究院网络信息研究所 | Peep-proof display method based on visual persistence time domain chopping |
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