CN115310151A - Display information protection method and device - Google Patents
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- CN115310151A CN115310151A CN202210973709.4A CN202210973709A CN115310151A CN 115310151 A CN115310151 A CN 115310151A CN 202210973709 A CN202210973709 A CN 202210973709A CN 115310151 A CN115310151 A CN 115310151A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/82—Protecting input, output or interconnection devices
- G06F21/84—Protecting input, output or interconnection devices output devices, e.g. displays or monitors
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels
Abstract
The embodiment of the invention relates to a display information protection method and a device, wherein the method comprises the following steps: displaying a first target image and a second target image on the same display terminal; controlling the brightness change of the display terminal when the first target image is displayed to be a first brightness range, and controlling the brightness change of the display terminal when the second target image is displayed to be a second brightness range; and controlling the average brightness value of the display terminal when the display terminal displays the first target image to be first brightness, and controlling the average brightness value of the display terminal when the display terminal displays the second target image to be second brightness. According to the technical scheme of the embodiment of the invention, the displayed target image is scrambled and then displayed by adopting different display brightness, and the synchronous receiving device is controlled to receive the target image, so that the target image to be displayed cannot be seen or shot from the display terminal by naked eyes or a shooting device, the safety of information display is improved, and the leakage of display information is fundamentally prevented.
Description
Technical Field
The embodiment of the invention relates to the technical field of image display, in particular to a display information protection method and device.
Background
Generally, when a user uses various display terminals (such as a notebook computer, a desktop monitor, a conference machine, etc.), the user sometimes wants to view and use important contents displayed on a screen only by himself, so as to prevent an onlooker from viewing the displayed contents unintentionally or intentionally. It is therefore desirable to provide a display terminal having a display information safeguard function to meet a specific need of a user.
In view of the above requirements, the current applications are more peep-proof treatments for computer displays, mobile phone screens, projectors, and the like. The peep-proof film is additionally arranged on the display surface, so that the front visible screen information and the side invisible screen information are realized, and the screen content can be prevented from being seen clearly by people beside the display screen. The principle is that the visual angle of the screen is narrowed to about 30 degrees by controlling the angle of the light. Obviously, the peep-proof treatment can only prevent information leakage to a certain extent, and has obvious limitation. The principle of the technology is that some information and marks which are not easily recognized by human eyes are added in a picture displayed by a terminal by adopting a technical means, and the marks correspond to electronic equipment for displaying the contents and have uniqueness. If the related content is shot and leaked, the corresponding equipment can be used for identifying the equipment from which the information is leaked from the picture, so that investigation and evidence collection of related departments are facilitated. However, this method can only be used as an aid for a remedy after a while, and cannot fundamentally prevent information leakage.
Disclosure of Invention
Based on the foregoing situation in the prior art, an object of the embodiments of the present invention is to provide a method and an apparatus for protecting display information, which implement protection of display information fundamentally by performing scrambling processing on a display target image and displaying with different display luminances.
To achieve the above object, according to an aspect of the present invention, there is provided a display information protection method, the method including:
displaying a first target image and a second target image on the same display terminal, wherein the first target image is an image to be displayed, and the second target image is an image formed by scrambling the first target image in real time according to the first target image;
controlling the brightness change of the display terminal when displaying the first target image to be a first brightness range, and controlling the brightness change of the display terminal when displaying the second target image to be a second brightness range, wherein the second brightness range is larger than or equal to the first brightness range;
and controlling the average brightness value of the display terminal when the display terminal displays the first target image to be first brightness, and controlling the average brightness value of the display terminal when the display terminal displays the second target image to be second brightness, wherein the second brightness is greater than the first brightness, and the first brightness and the second brightness are both in a second brightness range.
Further, the method further comprises:
controlling the first brightness to be a preset value;
the second luminance is controlled to a time-varying value.
Further, the method further comprises:
controlling the first brightness to be a preset value;
the second brightness is controlled to a value varying with the display area.
Further, the method further comprises:
controlling the first brightness to be a time-varying value at a time-varying rate of t 1 ；
Controlling the second brightness to be a time-varying value at a time-varying rate t 2 ；
Wherein, t 1 <t 2 。
Further, the method further comprises:
controlling the first brightness to be a value varying with the display area at a rate of change l 1 ；
Controlling the second brightness to be a value varying with the display area at a rate of change l 2 ；
Wherein l 1 <l 2 。
Further, the method further comprises:
when the display terminal displays the first target image, synchronously receiving the display content of the display terminal;
and when the display terminal displays the second target image, closing the display content of the receiving display terminal.
Further, the displaying the first target image and the second target image on the same display terminal includes:
simultaneously displaying a first target image and a second target image on the same display terminal, and displaying the first target image and the second target image in an interlaced manner, wherein odd-row pixels display the first target image, and even-row pixels display the second target image; alternatively, the first and second liquid crystal display panels may be,
and simultaneously displaying a first target image and a second target image on the same display terminal, and displaying the first target image and the second target image in alternate columns, wherein odd-column pixels display the first target image, and even-column pixels display the second target image.
Further, the displaying the first target image and the second target image on the same display terminal includes:
the first target image and the second target image are displayed alternately in a cycle in time.
According to another aspect of the present invention, there is provided a display information protection apparatus including:
the display control device is used for displaying a first target image and a second target image on the same display terminal, wherein the first target image is an image to be displayed, and the second target image is an image formed by scrambling the first target image;
the brightness control device is used for controlling the brightness change of the display terminal when the first target image is displayed to be a first brightness range and the brightness change of the display terminal when the second target image is displayed to be a second brightness range, and the second brightness range is larger than or equal to the first brightness range;
the brightness control device is further configured to control the average brightness value when the display terminal displays the first target image to be a first brightness, and the average brightness value when the display terminal displays the second target image to be a second brightness, where the second brightness is greater than the first brightness, and both the first brightness and the second brightness are within a second brightness range.
Further, the device also comprises a synchronous receiving device, which is used for synchronously receiving the display content of the display terminal when the display terminal displays the first target image; and when the display terminal displays the second target image, closing the display content of the receiving display terminal.
In summary, an embodiment of the present invention provides a display information protection method and device, where the method includes: displaying a first target image and a second target image on the same display terminal, wherein the first target image is an image to be displayed, and the second target image is an image formed by scrambling the first target image; controlling the brightness change of the display terminal when displaying the first target image to be a first brightness range, and controlling the brightness change of the display terminal when displaying the second target image to be a second brightness range, wherein the second brightness range is larger than or equal to the first brightness range;
and controlling the average brightness value of the display terminal when the display terminal displays the first target image to be first brightness, and controlling the average brightness value of the display terminal when the display terminal displays the second target image to be second brightness, wherein the second brightness is greater than the first brightness, and the first brightness and the second brightness are both in a second brightness range. According to the technical scheme of the embodiment of the invention, the displayed target image is scrambled and then displayed by adopting different display brightness, and the synchronous receiving device is controlled to receive the target image, so that the target image to be displayed cannot be seen or shot from the display terminal by naked eyes or a shooting device, the safety of information display is improved, and the leakage of display information is fundamentally prevented.
Drawings
Fig. 1 is a flowchart of a display information protection method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the alternate cyclic display of a first target image and a second target image in time.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings in combination with the embodiments. It is to be understood that these descriptions are only illustrative and are not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
It is to be understood that unless otherwise defined, technical or scientific terms used in one or more embodiments of the present invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in one or more embodiments of the invention are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
The technical scheme of the invention is explained in detail in the following with reference to the attached drawings. In an embodiment of the present invention, a method for protecting display information is provided, and fig. 1 shows a flowchart of the method 100 for protecting display information, where the method includes the following steps:
s102, displaying a first target image and a second target image on the same display terminal, wherein the first target image is an image to be displayed, and the second target image is an image formed by scrambling the first target image in real time according to the characteristics of the first image. The display terminal in the embodiment of the invention can be any one of a mobile phone, a notebook computer, a desktop computer display, a television and a conference all-in-one machine, and can also be other common display terminals. The first target image is an image to be displayed, that is, an image desired to be displayed, and the image may be a text image or a pattern image, and may be a static image or a dynamic image. The second target image is an image formed by scrambling the first target image, for example, the scrambling method includes dividing the first target image into units, disordering the arrangement order of the units, and rearranging and combining the units to generate the second target image.
According to some embodiments, the first target image is divided into a matrix of cells, and each pixel cell in the pixel array of the display terminal corresponds to each element of the matrix when displayed on the display terminal. For example, the first target images are respectively the matrix HM 1 ：
Wherein h is 1 l 1 Content displayed by the 1 st row and 1 st column pixels in the pixel array of the display terminal, h 1 l 2 The display content of the pixels in the 1 st row and the 2 nd column, \ 8230; \ 8230;, and so on, has M rows and N columns.
The display content of the second target image can be obtained by translating the display content of the first target image, and the second target image is obtained by applying the translation to the first target image HM 1 The second target image HM is realized by performing up-down translation between rows, left-right translation between columns, or both translation between rows and columns on the display content 2 And generating display content.
For example by fitting a matrix HM of the first target image 1 And circularly translating the upper line and the lower line by 1 line to generate a matrix HM of a second target image 2 Comprises the following steps:
for example by fitting a matrix HM of the first target image 1 Left and right columns are cyclically shifted by 1 column to generate a matrix HM of the second target image 2 Comprises the following steps:
for example by a matrix HM of the first target image 1 And circularly translating the upper line and the lower line by 1 line and circularly translating the left line and the right line by 1 line to generate a matrix HM of a second target image 2 Comprises the following steps:
when the up-and-down translation between rows, the left-and-right translation between columns, and the simultaneous translation of rows and columns are performed according to the above method, the number of rows and columns for translation and the number of rows and columns for translation intervals can be determined according to actual needs, and are not listed here.
Displaying the first target image and the second target image on the same display terminal, which may be implemented as follows:
and simultaneously displaying a first target image and a second target image on the same display terminal, and displaying the first target image and the second target image in an interlaced manner, wherein odd-row pixels display the first target image, and even-row pixels display the second target image. For example a first target image matrix HM 1 Comprises the following steps:
second target image matrix HM 2 Comprises the following steps:
at this time, for example, the first row pixel display matrix HM of the display terminal 1 The contents of the first row of (c):
[h 1 l 1 h 1 l 2 h 1 l 3 …… h 1 l N ]
second row pixel display matrix HM of the display terminal 2 The contents of the second line of (1):
[h 1 l N h 1 l 1 h 1 l 2 …… h 1 l N ]
third row pixel display matrix HM of display terminal 1 The contents of the third line of (c):
[h 3 l 1 h 3 l 2 h 3 l 3 …… h 3 l N ]
fourth row pixel display matrix HM of display terminal 2 The fourth line of (2):
[h 3 l N h 3 l 1 h 3 l 2 …… h 3 l N ]
and the like until the contents of the first target image and the second target image are all displayed.
Alternatively, the first target image and the second target image may be displayed in alternate columns, the first target image may be displayed by pixels in odd-numbered columns, and the second target image may be displayed by pixels in even-numbered columns. The specific display mode is the same as the above interlaced display, and is not described herein again.
According to some embodiments, the first target image and the second target image are displayed on the same display terminal, and the first target image and the second target image may be displayed alternately and circularly in time. Fig. 2 shows a schematic diagram of alternately displaying the first target image and the second target image in a time cycle, as shown in fig. 2, in the timing chart Ts1, for the first target image TX1 and the second target image TX2, both are displayed at a frame rate of displaying 40 frames per second, and within a time period of 1 second, the duration of each frame is normally 25ms, when the two images are alternately displayed in a cycle, each frame corresponding to the first target image TX1 can only display 12.5ms, and each frame corresponding to the second target image TX2 can only display 12.5ms, so that the two images are alternately displayed in time, and it can be seen that the frame rates of the first target image TX1 and the second target image TX2 are the same. The frame rates of the first target image TX1 and the second target image TX2 may also be different. In addition, in order to improve the definition of the corresponding target image, a method of prolonging the duration of a single-frame picture can be adopted for the corresponding target image.
And S104, controlling the brightness of the display terminal to be changed into a first brightness range when the first target image is displayed, and controlling the brightness of the display terminal to be changed into a second brightness range when the second target image is displayed, wherein the second brightness range is larger than or equal to the first brightness range. For example, the mode of the display terminal when the target image is normally displayed is a normal mode, the display luminance variation range in the normal mode is a normal luminance range, the mode when the scrambled image is displayed is a scrambling mode, the luminance variation when the first target image is displayed in the scrambling mode is a first luminance range, the luminance variation when the second target image is displayed is a second luminance range, the second luminance range is greater than or equal to the first luminance range, and both the first luminance range and the second luminance range are greater than the normal luminance range. By enlarging the variation range of the display brightness of the display terminal in the scrambling mode, images displayed in the scrambling mode can not be easily distinguished by naked eyes. For brightness control of a display terminal, generally speaking, a computer video signal is in an RGB format, and three colors each occupy 8 bits, for a total of 24 bits. Firstly, converting an RGB signal format of a pixel point in a first target image into a YUV (4); UV is the chroma, 8 bits each, and 24 bits in total. The value of Y ranges from 0 to 255. This time is:
Y＝(0.257*R)+(0.504*G)+(0.098*B)+16
C r ＝V＝(0.439*R)-(0.368*G)-(0.071*B)+128
C b ＝U＝-(0.148*R)-(0.291*G)+(0.439*B)+128
s106, controlling the average brightness value of the display terminal when the first target image is displayed to be first brightness, controlling the average brightness value of the display terminal when the second target image is displayed to be second brightness, wherein the second brightness is larger than the first brightness, and the first brightness and the second brightness are both in a second brightness range. In this step, the luminance values at the time when the first target image and the second target image are displayed on the display terminal are further controlled. The average value of the brightness when the display terminal displays the target image can be calculated by the following method: setting the original brightness of a pixel M (i, j) in the target image, wherein the i, j is the coordinate of a pixel point in the image, as Y M (i, j); and in the scrambling mode, the brightness of the corresponding pixel point in the target image is adjusted to be Y M ' (i, j). The same can mark the brightness values of 3 × 3 dots centered on M dots in turn. Usually, the brightness of a certain pixel in an image is correlated with the brightness of surrounding pixels, and at this time, the (weighted) average brightness value in a certain area around the certain pixel is calculated
The change relation of the regional brightness can be reflected more accurately.
The calculation of the luminance average value may also be performed by labeling the luminance values of 5 × 5 dots centering on the M dot, the luminance values of 7 × 7 dots, or the luminance values of more dots.
The first brightness and the second brightness in this step can be controlled in the following ways:
s1061, controlling the first brightness to be a preset value; the second brightness is controlled to a time-varying value. For example, let the first brightness be k 1 The second brightness is k 2 Then k is 1 K, K being a preset luminance value, within the first luminance range; k is a radical of formula 2 = g (t), g (t) is a function which changes with time t, can be a function which changes linearly, and can also be a function which changes nonlinearly. That is, the display luminance when the second target image is displayed may be changed with time, may be changed to be brighter with time, may be changed to be darker with time, and the rate of change of the change may be a constant value or a change value, and the range of the final change should be within the second luminance range.
S1062, controlling the first brightness to be a preset value; the second brightness is controlled to a value varying with the display area. For example, let the first brightness be k 1 The second brightness is k 2 Then k is 1 K, K being a preset luminance value, within the first luminance range; k is a radical of formula 2 And = f (l), where f (l) is a function that varies with the display area l, and may be a function that varies linearly or a function that varies non-linearly, that is, the display luminance when the second target image is displayed varies with the display area. The display area l may be a row or a column of a pixel array of the display terminal, and when l represents a row of the pixel array, the display brightness of the display terminal changes sequentially with the row number of the pixel array when displaying the second target image; when l represents a column of the pixel array, the display brightness of the display terminal changes sequentially with the number of columns of the pixel array when the display terminal displays the second target image. The display area l may be a divided area in which the pixel array of the display terminal divides the display image according to a predetermined rule.For example, a region with a close color may be divided into one region, or a region that does not change in consecutive frames in a moving image may be used as a background region, and a region that changes may be used as a foreground region. After such display area division, when the display terminal displays the second target image, the display brightness changes with different areas.
S1063, controlling the first brightness to be a value changing along with time, wherein the rate of change along with time is a first rate of change t 1 (ii) a Controlling the second brightness to be a time-varying value at a second time-varying rate t 2 (ii) a Wherein, t 1 <t 2 . For example, let the first brightness be k 1 The second brightness is k 2 Then k is 1 ＝g 1 (t)，k 2 ＝g 2 (t)，g 1 (t) and g 2 (t) is a function of time t. When g is 1 (t) and g 2 (t) are all linearly varying functions, i.e. a first rate of change t 1 And a second rate of change t 2 Are all constant, t 1 <t 2 。g 1 (t) and g 2 (t) may also be both functions that vary non-linearly, or one may be a function that varies linearly and the other a function that varies non-linearly.
S1064, controlling the first brightness to be a value varying with the display area, wherein the variation rate with the display area is a first variation rate l 1 (ii) a Controlling the second brightness to be a value varying with the display area, and the rate of change with the display area to be a second rate of change l 2 (ii) a Wherein l 1 <l 2 . For example, let the first brightness be k 1 The second brightness is k 2 Then k is 1 ＝f 1 (l)；k 2 ＝f 2 (l)，f 1 (l) And f 2 (l) The display brightness is a function varying with the display area l, and may be a function varying linearly or a function varying nonlinearly, that is, the display brightness when the first target image and the second target image are displayed varies with the display area. When both are linearly varying functions, l 1 <l 2 。f 1 (t) and f 2 (t) may also be both functions which vary non-linearly, or one of them may be linearOne function of variation and the other function of non-linear variation. The display area l can be a row or a column of a pixel array of the display terminal, and when l represents the row of the pixel array, the display brightness of the display terminal is sequentially changed along with the row number of the pixel array when the display terminal displays a target image; when l represents a column of the pixel array, the display luminance of the display terminal changes in sequence with the number of columns of the pixel array when displaying the target image. The display area l may be a divided area in which the pixel array of the display terminal divides the display image according to a predetermined rule. For example, a region with a close color may be divided into one region, or a region that does not change in consecutive frames in a moving image may be used as a background region, and a region that changes may be used as a foreground region. After such display area division, when the display terminal displays the target image, the display brightness changes with different areas.
The method of the embodiment of the invention also comprises the following steps: when the display terminal displays the first target image, synchronously receiving the display content of the display terminal; and when the display terminal displays the second target image, closing the display content of the receiving display terminal. The display image may be received by a synchronization receiving device, such as synchronization glasses. When the first target image is displayed, controlling two lenses of the synchronous glasses to be synchronously opened, and at the moment, displaying light on a terminal screen to be watched through the two lenses; and when the display terminal displays the second target image, controlling the two lenses of the synchronous glasses to be synchronously closed, and at the moment, the light of the screen of the display terminal is blocked by the two lenses and is not watched. So that only the normal first target image display contents can be seen through the synchronization glasses. Therefore, the first target image, namely the normal image can be observed through the synchronous glasses when the first target image is displayed within the display time corresponding to the first target image. When the second target image, i.e. the scrambled image, is displayed within the corresponding display time, the scrambling cannot be observed by the synchronization glasses, because the control signal sent to the synchronization glasses during the time of displaying the second target image causes the synchronization glasses to close and the display content of the second target image cannot be seen. Therefore, after wearing the synchronous glasses, the user sees only the first target image, i.e., the normal image. For the shooting device or direct visual observation, the display terminal displays the first target image and the second target image, namely the normal image and the scrambled image, which are presented as the disordered images on the whole, so that the normal images cannot be obtained, the shooting and peeping prevention effects are achieved, or the shot pictures have no visual value.
An embodiment of the present invention further provides a display information protection apparatus, including:
the display control device is used for displaying a first target image and a second target image on the same display terminal, wherein the first target image is an image to be displayed, and the second target image is an image formed by scrambling the first target image; the brightness control device is used for controlling the brightness change of the display terminal when the first target image is displayed to be a first brightness range and the brightness change of the display terminal when the second target image is displayed to be a second brightness range, and the second brightness range is larger than or equal to the first brightness range;
the brightness control device is further configured to control the average brightness value when the display terminal displays the first target image to be a first brightness, and the average brightness value when the display terminal displays the second target image to be a second brightness, where the second brightness is greater than the first brightness, and both the first brightness and the second brightness are within a second brightness range.
According to some embodiments, the display control means may comprise scrambled image generation means for generating the scrambled second target image in real time in dependence on a characteristic of the first target image to be displayed.
The synchronous receiving device is used for synchronously receiving the display content of the display terminal when the display terminal displays the first target image; and when the display terminal displays the second target image, closing the display content of the receiving display terminal. The synchronous receiving device is, for example, synchronous glasses, the synchronous glasses and the brightness control device are interconnected through wireless or wired communication, the synchronous glasses receive wireless communication signals from the brightness control device, and opening actions of lenses of the synchronous glasses are synchronously controlled to be matched with display of the first target image, including opening time synchronization, frequency adaptation and the like. Preferably, the wireless communication signal is a direct sequence spread spectrum signal or a frequency hopping signal which is encrypted and/or has anti-interference capability, so that the wireless communication signal can effectively and reliably carry out synchronous control on the synchronous glasses, and the synchronous glasses are prevented from being interfered and working failure is avoided.
The specific functions and operations of the respective modules in the above-described display information protection apparatus have been described in detail in the display information protection method of the above-described embodiment, and therefore, a repetitive description thereof will be omitted herein.
In summary, the embodiments of the present invention relate to a method and an apparatus for protecting display information, where the method includes: displaying a first target image and a second target image on the same display terminal, wherein the first target image is an image to be displayed, and the second target image is an image formed by scrambling the first target image; controlling the brightness change of the display terminal when the first target image is displayed to be a first brightness range, and controlling the brightness change of the display terminal when the second target image is displayed to be a second brightness range, wherein the second brightness range is larger than or equal to the first brightness range; and controlling the average brightness value of the display terminal when the display terminal displays the first target image to be first brightness, and controlling the average brightness value of the display terminal when the display terminal displays the second target image to be second brightness, wherein the second brightness is greater than the first brightness, and the first brightness and the second brightness are both in a second brightness range. According to the technical scheme of the embodiment of the invention, the displayed target image is scrambled and then displayed by adopting different display brightness, and the synchronous receiving device is controlled to receive the target image, so that the target image to be displayed cannot be seen or shot by naked eyes or a shooting device from the display terminal, the safety of information display is improved, and the leakage of display information is fundamentally prevented.
It should be understood that the discussion of any embodiment above is merely exemplary, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to those examples; features from the above embodiments, or from different embodiments, may also be combined, steps may be implemented in any order, and there are many other variations of the different aspects of one or more embodiments of the invention as described above, which are not provided in detail for the sake of brevity. The foregoing detailed description of the invention is merely exemplary in nature and is not intended to limit the invention. Therefore, any modifications, equivalents, improvements and the like which are made without departing from the spirit and scope of the present invention shall be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A method for protecting display information, the method comprising:
displaying a first target image and a second target image on the same display terminal, wherein the first target image is an image to be displayed, and the second target image is an image formed by scrambling the first target image in real time according to the first target image;
controlling the brightness change of the display terminal when displaying the first target image to be a first brightness range, and controlling the brightness change of the display terminal when displaying the second target image to be a second brightness range, wherein the second brightness range is larger than or equal to the first brightness range;
and controlling the average brightness value of the display terminal when the display terminal displays the first target image to be first brightness, and controlling the average brightness value of the display terminal when the display terminal displays the second target image to be second brightness, wherein the second brightness is greater than the first brightness, and the first brightness and the second brightness are both in a second brightness range.
2. The method of claim 1, further comprising:
controlling the first brightness to be a preset value;
the second luminance is controlled to a time-varying value.
3. The method of claim 1, further comprising:
controlling the first brightness to be a preset value;
the second brightness is controlled to a value varying with the display area.
4. The method of claim 1, further comprising:
controlling the first brightness to be a time-varying value at a time-varying rate t 1 ；
Controlling the second brightness to be a time-varying value at a time-varying rate of t 2 ；
Wherein, t 1 <t 2 。
5. The method of claim 1, further comprising:
controlling the first brightness to be a value varying with the display area at a rate of change l 1 ；
Controlling the second brightness to be a value varying with the display area at a rate of change l 2 ；
Wherein l 1 <l 2 。
6. The method according to any one of claims 2-5, further comprising:
when the display terminal displays the first target image, synchronously receiving the display content of the display terminal;
and when the display terminal displays the second target image, closing the display content of the receiving display terminal.
7. The method of claim 6, wherein displaying the first target image and the second target image on the same display terminal comprises:
simultaneously displaying a first target image and a second target image on the same display terminal, and displaying the first target image and the second target image in an interlaced manner, wherein odd-numbered pixels display the first target image, and even-numbered pixels display the second target image; alternatively, the first and second electrodes may be,
and simultaneously displaying the first target image and the second target image on the same display terminal, and displaying the first target image and the second target image in alternate columns, wherein odd-numbered columns of pixels display the first target image, and even-numbered columns of pixels display the second target image.
8. The method of claim 6, wherein displaying the first target image and the second target image on the same display terminal comprises:
the first target image and the second target image are displayed alternately in a cycle in time.
9. A display information protection apparatus, comprising:
the display control device is used for displaying a first target image and a second target image on the same display terminal, wherein the first target image is an image to be displayed, and the second target image is an image formed by scrambling the first target image;
the brightness control device is used for controlling the brightness change of the display terminal when the first target image is displayed to be a first brightness range and the brightness change of the display terminal when the second target image is displayed to be a second brightness range, and the second brightness range is larger than or equal to the first brightness range;
the brightness control device is further configured to control the average brightness value when the display terminal displays the first target image to be a first brightness, and the average brightness value when the display terminal displays the second target image to be a second brightness, where the second brightness is greater than the first brightness, and both the first brightness and the second brightness are within a second brightness range.
10. The apparatus according to claim 9, further comprising a synchronous receiving means for synchronously receiving the display contents of the display terminal when the display terminal displays the first target image; and when the display terminal displays the second target image, closing the display content of the receiving display terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210973709.4A CN115310151A (en) | 2022-08-15 | 2022-08-15 | Display information protection method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210973709.4A CN115310151A (en) | 2022-08-15 | 2022-08-15 | Display information protection method and device |
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| CN202210973709.4A Pending CN115310151A (en) | 2022-08-15 | 2022-08-15 | Display information protection method and device |
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