CN111190296A - Peep-proof method for display - Google Patents
- ️Fri May 22 2020
CN111190296A - Peep-proof method for display - Google Patents
Peep-proof method for display Download PDFInfo
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- CN111190296A CN111190296A CN202010117091.2A CN202010117091A CN111190296A CN 111190296 A CN111190296 A CN 111190296A CN 202010117091 A CN202010117091 A CN 202010117091A CN 111190296 A CN111190296 A CN 111190296A Authority
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- China Prior art keywords
- display
- image
- display screen
- peep
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- 2020-02-25 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1323—Arrangements for providing a switchable viewing angle
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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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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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a peep-proof method for a display. Presetting a first integrated image for display in a front-view area and a second integrated image for display in a peep-proof view angle; calculating a first image displayed by a first display screen and a second image displayed by a second display screen according to the corresponding relation between pixel units of the first display screen and pixel units displayed by the second display screen; calculating pixel parameters of the first display screen and the second display screen according to the first image and the second image so as to meet gray scale requirements; adjusting the positions of the pixels of the second display screen according to the calculated pixel parameters and the corresponding relation of the first display screen and the second display screen; the first image and the second image are superimposed in 3D space such that the first integrated image is generated in an area of emmetropia and the second integrated image is generated in an area of non-emmetropia.
Description
Technical Field
The invention relates to a display device, in particular to a peep-proof method for a display.
Background
Due to the wide viewing angle (wide viewing angle) of liquid crystal displays such as vertical alignment (VA mode) liquid crystal displays, when a user uses a personal display in a public place, private data in the display may be peeped by a neighboring person. Due to the diversification of the demands, people need to meet the display requirements of the peep-proof display state and also need to realize the display capability of the common display state, which puts higher requirements on the development of related display equipment.
It has therefore been proposed in the prior art that asymmetric turning films can be used in conjunction with a plurality of light sources to provide a usable or desired light output distribution. In particular, the display device of patent WO2015/153329a2 presents a peep-proof display device, as shown in fig. 1. A layer of 107 light control film material is added in the backlight module, and the
backlight sources101 and 102 are matched to respectively realize the switching between a normal display mode and a peep-proof display mode. When the
backlight101 is turned on, light enters from the
side surface103 of the film material to form a
light beam105, and peep-proof display is performed; when the
backlight source102 is turned on, light enters from the
side104 of the film material to form a
light beam106, which is displayed at a normal viewing angle, so that a user can see a correct signal at a normal viewing angle, and cannot see the correct signal at a large viewing angle (i.e., an oblique viewing angle) due to signal interference. However, in the scheme provided by the patent, the manufacturing difficulty of the light
control film material107 is high, and because the stray light of the backlight light is high, the finally formed peeping-proof viewing angle is large, and the peeping-proof effect cannot reach an ideal state. In addition, in such a privacy protection method, since the additional sub-pixels are required to display the interference signals, the brightness of the display panel is sacrificed, and the contrast is also sacrificed.
Disclosure of Invention
The invention mainly solves the technical problem of providing a display peep-proof method, and aims to realize that a target image can be generated by overlapping in a front view angle region through overlapping a plurality of images in a 3D space, and a mixed peep-proof display image can be generated by overlapping in the peep-proof angle region, so that the display content of the target image cannot be identified at angles except the front view angle.
According to the embodiment of the invention, the invention adopts a technical scheme that a first integrated image is preset for display in a front-view area, and a second integrated image is preset for display in a peep-proof view angle; calculating a first image displayed by a first display screen and a second image displayed by a second display screen according to the corresponding relation between pixel units of the first display screen and pixel units displayed by the second display screen; calculating pixel parameters of the first display screen and the second display screen according to the first image and the second image so as to meet gray scale requirements; adjusting the positions of the pixels of the second display screen according to the calculated pixel parameters and the corresponding relation of the first display screen and the second display screen; the first image and the second image are superimposed in 3D space such that the first integrated image is generated within an area of emmetropia and a second integrated image is generated within a non-emmetropia area; wherein the first display screen and the second display screen are not on the same plane, they are stacked in the vertical direction, and the pixel units of the respective display screens correspond.
In a preferred embodiment, the display source comprises a first display screen and a second display screen, wherein the first display screen is provided with an optical filter for displaying color signals; and the second display screen is arranged below the first display screen, is not provided with an optical filter and is used for displaying the gray scale signals. Specifically, the panel of the first display screen is provided with a filter for displaying RGB color information, and the panel of the second display screen is free of a filter structure and only performs gray scale display. The display driving chip and the image processing chip generate a first image and a second image according to the original image and the peep-proof display effect through a splitting algorithm and transmit the first image and the second image to the display screen for displaying. When the screen is viewed from different viewing angles, the viewed image content is the result of the multiplication of pixels on the first display screen and pixels on the second display screen. Due to the difference of the gray scale values of the pixels, the difference of the result of superposition multiplication of the pixels is large, and meanwhile, the assignment of the pixels on the first display screen and the second display screen is obtained through an image processing algorithm so as to ensure that the display content of the image after superposition of the pixels at the positive viewing angle and the peep-proof viewing angle meets the requirement of the peep-proof viewing angle.
According to the light field superposition of the spatial pixels, assuming that the brightness of the front-view image is g (x, y) and the brightness of the side-view image is f (x, y), the corresponding position on the screen can be calculated, and the difference of the images seen by the viewer from different angles can be expressed as:
Δd(x,y)＝g(x,y)－f(x,y)＝ga1*fb1－ga1*fb2。
therefore, according to an image processing algorithm, pixel values of pixel points on the first display screen and the second display screen are calculated, and the light field superposition effect of different visual angles is achieved.
In a preferred embodiment, the first display panel is provided with a first polarizing plate, and the second display panel is provided with an upper polarizing plate and a lower polarizing plate, and a polarization direction of the first polarizing plate is orthogonal to a polarization direction of the upper polarizing plate.
In a preferred embodiment, during the first integrated image display process, the display image of the second display screen is a continuous driving signal or a pulse driving signal.
In a preferred embodiment, during the first integrated image display process, the display image of the first display screen is a pulse-type driving signal.
In a preferred embodiment, the second display screen loads an HDR luminance image for HDR display of the first unified image. The display peep-proof method can switch the normal display mode and the peep-proof display mode and has HDR display function. When the display screen is in the peep-proof display mode, the first display screen and the second display screen are respectively loaded with peep-proof image contents, and a peep-proof display effect is formed through the corresponding relation of pixels; when in the HDR display mode, the first screen loads an actual display image, the second screen loads an HDR brightness image, and the HDR picture display effect is realized by the superposition of the brightness of the two screens.
In a preferred embodiment, the distance between the first display screen and the second display screen is adjusted to adjust the superposition effect of the first image and the second image in the 3D space.
In a preferred embodiment, the first display image of the first display screen and the second display image of the second display screen have the same gray scale, and the first display image is independent of the information of the first integrated image.
In a preferred embodiment, the first display image of the first display screen and the second display image of the second display screen have the same gray scale, and the first display image is related to the information of the first integrated image.
Drawings
The invention and its advantages will be better understood by studying the following detailed description of specific embodiments, given by way of non-limiting example, and illustrated in the accompanying drawings, in which:
fig. 1 is a peep-proof display device of a prior art.
Fig. 2 is a flowchart of a display peeping prevention method according to embodiment 1 of the present invention.
Fig. 3 is a sectional view of a peep-proof display screen using the display peep-proof method according to embodiment 1 of the present invention, showing a structural example of the peep-proof display screen.
Fig. 4 is an exploded view of a peep-proof display panel using the display peep-proof method according to embodiment 1 of the present invention, showing the pixel cell correspondence and general optical principle of the first display panel and the second display panel of the peep-proof display panel.
Fig. 5 is a front view of a privacy screen using the privacy method of the display device of embodiment 1 of the present invention, showing the privacy display optical principle of the privacy screen.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements throughout, the principles of the present invention are illustrated in an appropriate environment. The following description is based on illustrated embodiments of the invention and should not be taken as limiting the invention with regard to other embodiments that are not detailed herein.
The word "embodiment" is used herein to mean serving as an example, instance, or illustration. In addition, the articles "a" and "an" as used in this specification and the appended claims may generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Further, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise direct contact of the first and second features through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Example 1
First, a display peeping prevention method according to embodiment 1 of the present invention will be described with reference to fig. 2 to 5, which includes the steps of: presetting a first integrated image for display in a front-view area and a second integrated image for display in a peep-proof view angle; calculating a first image displayed by a first display screen and a second image displayed by a second display screen according to the corresponding relation between pixel units of the first display screen and pixel units displayed by the second display screen; calculating pixel parameters of the first display screen and the second display screen according to the first image and the second image so as to meet gray scale requirements; adjusting the positions of the pixels of the second display screen according to the calculated pixel parameters and the corresponding relation of the first display screen and the second display screen; the first image and the second image are superimposed in 3D space such that the first integrated image is generated within an area of emmetropia and a second integrated image is generated within a non-emmetropia area; wherein the first display screen and the second display screen are not on the same plane, they are stacked in the vertical direction, and the pixel units of the respective display screens correspond.
The first image displayed by the
first display screen201 and the second image displayed by the
second display screen202 are superimposed in 3D space such that a first unified image V1 is generated in the frontal viewing area of the privacy screen and a second unified image V2 is generated in the non-frontal viewing area of the privacy screen. The pixel units of the
first display screen201 correspond to the pixel units displayed by the
second display screen202.
As shown in fig. 3, the
first display screen201 has a filter 2011 for displaying color information, and the
second display screen202 has no filter. The panel of the
first display201 has a filter 2011 for displaying RGB color information, and the panel of the
second display202 has no filter structure, and only performs gray scale display. The display driving
chip203 and the
image processing chip204 generate a first image and a second image according to the original image and the peep-proof display effect through a splitting algorithm and transmit the first image and the second image to the display screen for displaying. As shown in fig. 4, when the screen is viewed from different viewing angles, the viewed image content is the result of multiplication of pixels on the
first display screen201 and pixels on the
second display screen202. Due to the difference of the gray scale values of the pixels, the difference of the result of the superposition multiplication of each pixel is large, and meanwhile, the assignment of each pixel on the
first display screen201 and the
second display screen202 is obtained through an image processing algorithm so as to ensure that the display content of the image after the superposition of the pixels at the positive viewing angle and the peep-proof viewing angle meets the requirement of the peep-proof viewing angle.
According to the light field superposition of the spatial pixels, assuming that the brightness of the front-view image is g (x, y) and the brightness of the side-view image is f (x, y), the corresponding position on the screen can be calculated, and the difference of the images seen by the viewer from different angles can be expressed as:
Δd(x,y)＝g(x,y)－f(x,y)＝ga1*fb1－ga1*fb2。
therefore, according to an image processing algorithm, pixel values of pixel points on the
first display screen201 and the
second display screen202 are calculated, so that the light field superposition effect of different viewing angles is realized.
Embodiment 1 shows a spatial distribution of privacy display in fig. 5, and the required
privacy viewing angle400 is calculated according to the spatial position correspondence, and is usually set to ± 30 °. The second unified image V2, typically a cluttered display, is displayed in privacy mode in the
area401 outside of the privacy-greater angle. According to the relative relationship between the
first display screen201 and the
second display screen202 in the embodiment, it can be found that the viewing angle is within the peep-
proof viewing angle400 to satisfy the requirement of superimposing to generate the normal display image, i.e. the first integrated image V1.
The
first display panel201 is provided with a first
polarizing plate2012, the
second display panel202 is provided with an upper polarizing plate 2021 and a lower
polarizing plate2022, and the polarization direction of the first
polarizing plate2012 is orthogonal to the polarization direction of the upper polarizing plate 2021.
The
first display panel201 includes a liquid crystal panel, and the first polarizer is disposed on an upper layer of the liquid crystal panel.
The display driving of the
second display screen202 is a continuous driving. The display driving of the
first display screen201 is pulse driving.
The
second display screen202 adopts gray scale display. The privacy display screen of the embodiment can switch between the normal display mode and the privacy display mode, and has an HDR display function. When the display screen is in the peep-proof display mode, the
first display screen201 and the
second display screen202 respectively load peep-proof image contents, and a peep-proof display effect is formed through the pixel corresponding relation; when in the HDR display mode, the first screen loads an actual display image, the second screen loads an HDR brightness image, and the HDR picture display effect is realized by the superposition of the brightness of the two screens.
The display mode of the peep-proof display screen in the embodiment is a spatial frequency domain superposition mode. According to the light field superposition of the display information, the generated first integrated image V1 and the second integrated image V2 satisfy a multiplication algorithm, that is, the content of a single pixel point seen by the viewer at different positions is a result of multiplication of corresponding pixel points of the first integrated image V1 and the second integrated image V2, and the content of the display image received by the viewer is luminance information obtained by multiplying the first image and the second image. Adjusting the distance between the first display screen and the second display screen to adjust the superposition effect of the first image and the second image in the 3D space.
Example 2
Only the differences between embodiment 2 and embodiment 1 will be described below, and the descriptions of the similarities will be omitted. The display mode of the peep-proof display method is a time-frequency domain superposition mode.
The display drive of the
second display screen202 is a pulse drive. The
first display screen201 and the
second display screen202 display the first image and the second image, respectively, in two consecutive frame times by the timing controller of the
image processing chip204, so that the two images satisfy an addition operation, and finally form the first integrated image V1 seen by the viewer in the
privacy viewing angle400 and the second integrated image V2 seen in the
area401.
While the invention has been described above with reference to certain embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the various embodiments of the present disclosure may be used in any combination, provided that there is no structural conflict, and the combination is not exhaustively described in this specification for brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A method of privacy display, comprising:
presetting a first integrated image for display in a front-view area and a second integrated image for display in a peep-proof view angle;
calculating a first image displayed by a first display screen and a second image displayed by a second display screen according to the corresponding relation between pixel units of the first display screen and pixel units displayed by the second display screen;
calculating pixel parameters of the first display screen and the second display screen according to the first image and the second image so as to meet gray scale requirements;
adjusting the positions of the pixels of the second display screen according to the calculated pixel parameters and the corresponding relation of the first display screen and the second display screen;
the first image and the second image are superimposed in 3D space such that the first integrated image is generated within an area of emmetropia and a second integrated image is generated within a non-emmetropia area;
wherein the first display screen and the second display screen are not on the same plane, they are stacked in the vertical direction, and the pixel units of the respective display screens correspond.
2. The display privacy method of claim 1, wherein: the first display screen is provided with an optical filter and is used for displaying color signals;
and the second display screen is arranged below the first display screen, is not provided with an optical filter and is used for displaying the gray scale signals.
3. The display privacy method of claim 2, wherein: the first display screen is provided with a first polaroid, the second display screen is provided with an upper polaroid and a lower polaroid, and the polarization direction of the first polaroid is orthogonal to the polarization direction of the upper polaroid.
4. The display privacy method of claim 3, wherein: the first display screen comprises a liquid crystal panel, and the first polaroid is arranged on the upper layer or the lower layer of the liquid crystal panel.
5. The display privacy method of claim 2, wherein: in the first integrated image display process, the display image of the second display screen is a continuous driving signal or a pulse driving signal.
6. The display privacy method of claim 5, wherein: in the first integrated image display process, the display image of the first display screen is a pulse type driving signal.
7. The display privacy method of claim 6, wherein: the second display screen loads an HDR luminance image for HDR display of the first unified image.
8. The display privacy method of claim 2, wherein: adjusting the distance between the first display screen and the second display screen to adjust the superposition effect of the first image and the second image in the 3D space.
9. The display privacy method of claim 2, wherein: the first display image of the first display screen and the second display image of the second display screen have the same gray scale, and the first display image is unrelated to the information of the first integrated image.
10. The display privacy method of claim 2, wherein: the first display image of the first display screen and the second display image of the second display screen have the same gray scale, and the first display image is related to the information of the first integrated image.
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| CN202010117091.2A CN111190296A (en) | 2020-02-25 | 2020-02-25 | Peep-proof method for display |
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| CN202010117091.2A CN111190296A (en) | 2020-02-25 | 2020-02-25 | Peep-proof method for display |
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Cited By (1)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113536403A (en) * | 2021-07-19 | 2021-10-22 | 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 interference hiding |
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