CN110459193B - Display method of display device and display device - Google Patents
Display method of display device and display device Download PDFInfo
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- CN110459193B CN110459193B CN201910802041.5A CN201910802041A CN110459193B CN 110459193 B CN110459193 B CN 110459193B CN 201910802041 A CN201910802041 A CN 201910802041A CN 110459193 B CN110459193 B CN 110459193B
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- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
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- G09G5/38—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory with means for controlling the display position
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Abstract
The embodiment of the invention provides a display method of a display device and the display device, wherein the method comprises the following steps: acquiring a first image and a second image to be displayed, wherein the first image is an image which can be viewed within the viewing range of the display device, and the second image is an image which can be viewed outside the viewing range of the display device; the first image data input to the first display panel and the second image data input to the second display panel are determined according to the first image and the second image, so that the image seen by a user on the front side of the first display panel is different from the image seen on the side of the first display panel, the purpose of peep prevention is achieved, and the peep prevention range can be flexibly adjusted according to actual conditions to meet different requirements of the user.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a display method of a display device and the display device.
Background
With the wide popularization of the internet and intelligent equipment, the life of people changes from the top to the bottom. Particularly, the mobile payment, social contact, working anytime and anywhere and the like are greatly convenient for people. But with the attendant security problems, for example, when entering a payment password, nearby people can see the entered password from the screen. For another example, when working with a computer in a public place, nearby people may see the content on the display screen, which may cause information leakage.
Disclosure of Invention
The invention aims to provide a display method of a display device and the display device, which aim to solve the problem that information leakage is possibly caused when the conventional display device displays information.
In order to achieve the above object, the present invention provides a display method of a display device, the display device including a first display panel and a second display panel which are stacked, pixels of the first display panel corresponding to pixels of the second display panel one to one, and an orthographic projection of the pixels of the first display panel on the second display panel overlapping with the corresponding pixels, the display method including:
acquiring a first image and a second image to be displayed, wherein the first image is an image which can be viewed within the viewing range of the display device, and the second image is an image which can be viewed outside the viewing range of the display device;
determining first image data input to the first display panel and second image data input to the second display panel from the first image and the second image.
Further, the determining, from the first image and the second image, first image data input to the first display panel and second image data input to the second display panel includes:
determining the first image data and the second image data according to the following expressions:
fore(u)＝raw(u)；
bear(u)＝raw(u)/fore(u)；
fore(i)＝sid(i)/bear(i+M)；
bear(i)＝raw(i)/fore(i)；
wherein 1< ═ i < M, M < ═ u < ═ n, n is the number of pixels of a preset sequence, and the preset sequence is a row or a column;
for (u) is a gray-scale value of the u-th pixel of the predetermined sequence of the first display panel;
for (i) is a gray-scale value of the ith pixel of the preset sequence of the first display panel;
bear (i + M) is the gray-scale value of the i + M th pixel of the preset sequence of the second display panel;
bear (i) is the gray-scale value of the ith pixel of the preset sequence of the second display panel;
raw (u) is a gray-scale value of the u-th pixel of the preset sequence of the first image;
raw (i) is a gray-scale value of an ith pixel of the preset sequence of the first image;
sid (i) is a gray-scale value of an ith pixel of the preset sequence of the second image.
If the value of for (i) is not greater than 255, then the value of for (i) is corrected to be β × sid (i)/bear (i + M);
if for (i) <1, modifying the value of for (i) 2 si d (i)/bear (i + M);
wherein β is 1/(α +1), α is for (i)/255.
Further, if bear (i) <1, or bear (i) >255, the value of modified for (i) is r1, and the value of bear (i) is r2, wherein raw (i) ═ r1 × r2, 1< r1< 255; 1< r2< ═ 255.
An embodiment of the present invention further provides a display device, where the display device includes a first display panel and a second display panel that are stacked, pixels of the first display panel correspond to pixels of the second display panel one to one, and an orthographic projection of a pixel of the first display panel on the second display panel coincides with a corresponding pixel, and the display device further includes:
the device comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring a first image and a second image to be displayed, the first image is an image which can be observed within the viewing range of the display device, and the second image is an image which can be observed outside the viewing range of the display device;
a determining module for determining first image data input to the first display panel and second image data input to the second display panel according to the first image and the second image.
Further, the determining module is configured to:
determining the first image data and the second image data according to the following expressions:
fore(u)＝raw(u)；
bear(u)＝raw(u)/fore(u)；
fore(i)＝sid(i)/bear(i+M)；
bear(i)＝raw(i)/fore(i)；
wherein 1< ═ i < M, M < ═ u < ═ n, n is the number of pixels of a preset sequence, and the preset sequence is a row or a column;
for (u) is a gray-scale value of the u-th pixel of the predetermined sequence of the first display panel;
for (i) is a gray-scale value of the ith pixel of the preset sequence of the first display panel;
bear (i + M) is the gray-scale value of the i + M th pixel of the preset sequence of the second display panel;
bear (i) is the gray-scale value of the ith pixel of the preset sequence of the second display panel;
raw (u) is a gray-scale value of the u-th pixel of the preset sequence of the first image;
raw (i) is a gray-scale value of an ith pixel of the preset sequence of the first image;
sid (i) is a gray-scale value of an ith pixel of the preset sequence of the second image.
If the value of for (i) is not greater than 255, then the value of for (i) is corrected to be β × sid (i)/bear (i + M);
if for (i) <1, modifying the value of for (i) 2 si d (i)/bear (i + M);
wherein β is 1/(α +1), α is for (i)/255.
Further, if bear (i) <1, or bear (i) >255, the value of modified for (i) is r1, and the value of bear (i) is r2, wherein raw (i) ═ r1 × r2, 1< r1< 255; 1< r2< ═ 255.
An embodiment of the present invention further provides a display device, including: the display device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program realizes the steps in the display method of the display device when being executed by the processor.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the display method of the display device are implemented.
In an embodiment of the present invention, the display device includes a first display panel and a second display panel which are stacked, pixels of the first display panel correspond to pixels of the second display panel one to one, and an orthographic projection of a pixel of the first display panel on the second display panel coincides with a corresponding pixel, and the display method includes: acquiring a first image and a second image to be displayed, wherein the first image is an image which can be viewed within the viewing range of the display device, and the second image is an image which can be viewed outside the viewing range of the display device; determining first image data input to the first display panel and second image data input to the second display panel from the first image and the second image. The peep-proof device can enable the image seen by the user on the front surface of the first display panel to be different from the image seen on the side surface of the first display panel, achieves the purpose of peep-proof, and can flexibly adjust the peep-proof range according to the actual situation so as to meet different requirements of the user
Drawings
Fig. 1 is a flowchart of a display method of a display device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a display device for human eye viewing according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a calculation process for a row of pixels according to an embodiment of the present invention;
FIG. 4 is a second schematic diagram of a human eye viewing display device according to an embodiment of the invention;
fig. 5 is a structural diagram of a display device according to an embodiment of the present invention;
fig. 6 is a structural diagram of another display device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a flowchart of a display method of a display device according to an embodiment of the present invention, where the display device includes a first display panel and a second display panel that are stacked, pixels of the first display panel correspond to pixels of the second display panel one to one, and a forward projection of a pixel of the first display panel on the second display panel coincides with a corresponding pixel, as shown in fig. 1, the display method includes the following steps:
The viewing range of the display device may be understood as a range of areas where the orthographic projection on the first display panel (or the second display panel) is located within the first display panel (or the second display panel). The out-of-viewing-range of the display device may be understood as a range of areas where the orthographic projection on the first display panel (or the second display panel) is located outside the first display panel (or the second display panel).
The first image may be understood as an image seen at the front of the first display panel, and the second image may be understood as an image seen at the side of the first display panel. The second image is a privacy image. When the user watches at first display panel side, the head has moved a distance relative first display panel, because there is the gap between the upper and lower two-layer display screen, not laminate together completely, consequently sees display panel from the side of first display panel and can see another image, peep-proof image promptly.
The second image may be a fixed image such that the same image is always seen when viewed from the side. The second image may also be determined according to the first image, for example, the first image is scrambled into the second image by using an image scrambling algorithm, such as Hilbert curve scrambling and random number scrambling, so that the difference between the first image and the second image is relatively large, and thus when the display panel is seen from the side, the content seen from the side will be relatively different from the first image, thereby achieving the purpose of anti-peeping. When the first image is determined from the second image, the second image may change as the first image changes.
First image data and second image data are determined from the first image and the second image. Specifically, the first image data and the second image data are determined according to the following expressions:
fore(u)＝raw(u)；
bear(u)＝raw(u)/fore(u)；
fore(i)＝sid(i)/bear(i+M)；
bear(i)＝raw(i)/fore(i)；
wherein 1< ═ i < M, M < ═ u < ═ n, n is the number of pixels of a preset sequence, and the preset sequence is a row or a column;
for (u) is a gray-scale value of the u-th pixel of the predetermined sequence of the first display panel;
for (i) is a gray-scale value of the ith pixel of the preset sequence of the first display panel;
bear (i + M) is the gray-scale value of the i + M th pixel of the preset sequence of the second display panel;
bear (i) is the gray-scale value of the ith pixel of the preset sequence of the second display panel;
raw (u) is a gray-scale value of the u-th pixel of the preset sequence of the first image;
raw (i) is a gray-scale value of an ith pixel of the preset sequence of the first image;
sid (i) is a gray-scale value of an ith pixel of the preset sequence of the second image.
As shown in fig. 2, reference numeral 1 denotes a first display panel, and reference numeral 2 denotes a second display panel. The reference numeral 11 indicates a position of human eyes, and the human eyes can see a display image after the two layers of display screens are correspondingly overlapped one by one in pixel as long as the position of the human eyes is within the width of the display screens (i.e., within the range indicated by the solid arrow) on the front surface of the display screen (i.e., the first display panel). When the human eye has appeared in the range, i.e. the position indicated by the reference numeral 22, and the human eye has appeared by the width of the display screen, the first display panel (i.e. the front screen) and the second display panel (i.e. the rear screen) are not in one-to-one correspondence, but are staggered by 1 column (or multiple columns), as indicated by the dotted arrows. The image seen by the human eye is now produced by the superposition of diagonally opposed pixels of the front and rear screens. As the human eye continues to move to the left, this tilt will continue to expand. Therefore, the image seen when the head moves to different positions can be regarded as the result that the rear screen moves left or right and then is overlapped with the front screen.
As shown in fig. 2, the position of the human eye is shown by reference numeral 22, which corresponds to the case when the rear screen is shifted one pixel to the left. The specific process of computing the first image data and the second image data from the first image (i.e., the RawImage) and the second image (i.e., the SideImage) is as follows:
in this embodiment, each line is used as a decomposition object (or each column is a decomposition object), and the line is independent from the line, that is, the calculation manner of each line is the same. The decomposition is performed in the first example of the row, and the other calculation steps are the same. As shown in the four rows of rectangles on the right side of fig. 3, each row represents a row of pixels, where:
assume that there are n pixels per row, numbered 1, 2, …, n.
raw (j) represents the gray-scale value of the jth pixel on the RawImage;
form (j) represents the gray level of the jth pixel on ForeImage (i.e. the first image data);
bear (j) represents the gray-scale value of the jth pixel on the BearImage (i.e., the second image data);
sid (j) represents the gray-scale value of the j th pixel on the SideImage; j is 1, 2, …, n.
The image superimposition viewed by the human eye on the side is indicated by the oblique arrows in fig. 3. It can be seen that the rightmost pixel for (n) of foreiamage has no corresponding pixel, so it does not need to be calculated, and can be determined by the following formula (1):
fore(n)＝raw(n) (1)
since an image seen by human eyes (i.e., an image displayed by the display device) is a result of superimposition of the first image data and the second image data, i.e., an imaging result of the p-th row and q-th column pixels (i.e., a gray-scale value of the p-th row and q-th column pixels of the first image) is: the product of the gray-scale value of the pixel at the p-th row and the q-th column of the first image data and the gray-scale value of the pixel at the p-th row and the q-th column of the second image data, therefore, the following expression can be obtained for the n-th pixel on the p-th row:
bear(n)＝raw(n)/fore(n) (2)
the calculation is performed starting from the pixel number n-1 and progressing to the left until the pixel number 1 using the following expression:
fore(i)＝sid(i)/bear(i+1) (3)
bear(i)＝raw(i)/fore(i) (4)
wherein the number of i is decreased from n-1 to 1.
And traversing each line of the RawImage and the SideImage to obtain first image data and second image data.
The above calculation method when moving a pixel to the left is that when moving M pixels to the left, M rightmost pixels of the foreiamge have no corresponding pixel, and at this time, the gray level value determination method of the M rightmost pixels of the foreiamge is as follows:
form (u) ═ raw (u); wherein M < ═ u < ═ n;
correspondingly, the gray-scale values of the rightmost M pixels of the second display panel are determined in the following manner:
bear(u)＝raw(u)/fore(u)；
since the rear panel is shifted by M pixels to the left, for the pixel with the sequence number 1< ═ i < M, the first image data is determined in the following manner:
fore(i)＝sid(i)/bear(i+M)；
bear(i)＝raw(i)/fore(i)；
and traversing each line of the RawImage and the SideImage to obtain first image data and second image data. The process only needs to traverse the first image and the second image once, and is high in speed and good in real-time performance.
The above calculation method corresponds to the case where the positions of the human eyes are on the left side of the display panel, and when the positions of the human eyes are on the right side of the display panel, the calculation method is the same as the above calculation method, except that the numbers of the pixels need to be numbered in a manner of increasing from right to left.
When the human eye moves up and down, the practical situation is considered:
(a) for example, the first position is opposite to the display screen, and the second position is required to be above or below the first position to meet the condition of vertical movement, but the position phenomenon has smaller chance.
(b) For another example, a is opposite to the display screen, and B is obliquely above or below the A, and the direction can be decomposed into horizontal displacement and vertical displacement. The horizontal direction has the peep-proof function, and even if the vertical peep-proof function is not added, the peep-proof function can be achieved on the whole.
(c) If the peep-proof function in the vertical direction is required, each column can be a decomposition object, and each column of the RawImage and the SideImage is traversed by adopting the mode to obtain the first image data and the second image data.
The correspondence between the position of the human eye and the number of pixels moved by the rear screen can be determined as follows. As shown in fig. 4, the width of each pixel is denoted as w, the height is denoted as h, the distance between two display screens is denoted as v, the distance between the human eye and the rear screen image at the position a is denoted as L, the horizontal distance from the position a to the position B is denoted as D, the human eye just sees the leftmost pixel for (1) of the foremmage at the position B, and the pixel corresponds to the BearImage and is the adjacent pixel bear (2), so that the anti-peep effect is just achieved. The position A, B is at an angle θ to the pixel bear (2). At this time, the moving distance D is calculated to obtain
D＝L*tan(θ)；
The dotted arrow in FIG. 4 passes through the top center of for (1) and the top center of bear (2), and thus has
tan(θ)＝w/(h+v)；
The following can be obtained by the above formula:
D＝L*w/(h+v)；
d represents the distance that the human eyes move to the left when the rear screen moves to the left by one pixel width w, namely the peep-proof distance corresponding to one pixel when the rear screen moves to the left. In the same way, the peep-proof distance corresponding to the M pixels is D ═ L × M × (w + v)
According to the formula, the peep-proof distance after M pixels are moved can be determined, so that the peep-proof distances can be set for different environments, then the number of pixels needing to be moved is calculated according to the peep-proof distances, and then the front screen image (namely, the first image data) and the rear screen image (namely, the second image data) are obtained through the first image and the second image.
The calculation in the above steps is the case of moving the human eyes to the left, and when the human eyes move to the right, it is equivalent to moving the rear screen to the right. Because the front and rear screen images are disordered, the peep-proof image seen on the right side is also different from the original image (namely the first image) greatly, and the peep-proof effect can be achieved.
In this embodiment, a first image and a second image to be displayed are obtained, where the first image is an image that can be viewed within a viewing range of the display device, and the second image is an image that can be viewed outside the viewing range of the display device; and determining first image data input to the first display panel and second image data input to the second display panel according to the first image and the second image, so that the image seen by a user on the front side of the first display panel is different from the image seen on the side of the first display panel, the purpose of peeping prevention is achieved, and the peeping prevention range can be flexibly adjusted according to actual conditions so as to meet different requirements of the user.
Optionally, in the process of obtaining the first image data and the second image data by calculation, since the calculation process involves division, the divisor cannot be 0 since division is involved. When the divisor is 0, 1 is added to the divisor and then the processing is performed. Since the value range of the pixel gray-scale value is 0-255, a decimal may be generated in the calculation process, which may result in a multiplied increase or decrease of the calculation result, and result in an excessively large or small data, and therefore, the calculation result needs to be corrected.
The manner of correcting the first image data may be:
if for (i) >255, modifying the value of for (i) to be β × sid (i)/bear (i + M);
if for (i) <1, modifying the value of for (i) 2 si d (i)/bear (i + M);
wherein β is 1/(α +1), α is for (i)/255.
Specifically, when for (i) >255, the rear panel moves by one pixel, the following processing is required:
calculating the amplification factor of form (i), and recording as
α＝fore(i)/255；
According to equation (3), the reduction for (i) is equal to the reduction sid (i), and thus the reduction factor
β＝1/(α+1)；
Recalculating for (i) to obtain:
fore(i)＝β*sid(i)/bear(i+1)；
since for (i) may be the denominator, it must be guaranteed that its value is greater than 0. When for (i) <1, the calculation result is multiplied, and at this time, the following expression is adopted:
fore(i)＝2*sid(i)/bear(i+1)；
if the front screen moves by M pixels, if the front screen moves by M pixels, the value of the front screen (i) is corrected to be beta + sid (i)/bear (i + M); if for (i) <1, modify the value of for (i) 2 si d (i)/bear (i + M).
The manner of correcting the second image data may be:
if bear (i) <1, or bear (i) >255, the value of revised for (i) is r1, and the value of bear (i) is r2, where raw (i) ═ r1 × r2, 1< r1< 255; 1< r2< ═ 255.
Since the value of modified bear (i) is equivalent to the value of modified for (i), this will result in more modifications. Thus when bear (i) <1, or bear (i) >255, raw (i) is decomposed into a form of multiplication of two numbers (e.g., a method of squaring), so that
raw(i)＝r1*r2，fore(i)＝r1，bear(i)＝r2；
That is, if bear (i) <1 or bear (i) >255, the value of correction for (i) is r1, the value of bear (i) is r2, the gray-scale values of the pixels at other positions are kept unchanged, and only the pixels with gray-scale values of bear (i) <1 or bear (i) >255 are corrected.
Referring to fig. 5, fig. 5 is a structural diagram of a display device according to an embodiment of the present invention, where the display device includes a first display panel and a second display panel that are stacked, pixels of the first display panel correspond to pixels of the second display panel one to one, and an orthographic projection of a pixel of the first display panel on the second display panel coincides with a corresponding pixel, as shown in fig. 5, the display device 500 includes:
an obtaining module 501, configured to obtain a first image and a second image to be displayed, where the first image is an image that can be viewed within a viewing range of the display device, and the second image is an image that can be viewed outside the viewing range of the display device;
a determining module 502, configured to determine, according to the first image and the second image, first image data input to the first display panel and second image data input to the second display panel.
Further, the determining module 502 is configured to:
determining the first image data and the second image data according to the following expressions:
fore(u)＝raw(u)；
bear(u)＝raw(u)/fore(u)；
fore(i)＝sid(i)/bear(i+M)；
bear(i)＝raw(i)/fore(i)；
wherein 1< ═ i < M, M < ═ u < ═ n, n is the number of pixels of a preset sequence, and the preset sequence is a row or a column;
for (u) is a gray-scale value of the u-th pixel of the predetermined sequence of the first display panel;
for (i) is a gray-scale value of the ith pixel of the preset sequence of the first display panel;
bear (i + M) is the gray-scale value of the i + M th pixel of the preset sequence of the second display panel;
bear (i) is the gray-scale value of the ith pixel of the preset sequence of the second display panel;
raw (u) is a gray-scale value of the u-th pixel of the preset sequence of the first image;
raw (i) is a gray-scale value of an ith pixel of the preset sequence of the first image;
sid (i) is a gray-scale value of an ith pixel of the preset sequence of the second image.
If the value of for (i) is not greater than 255, then the value of for (i) is corrected to be β × sid (i)/bear (i + M);
if for (i) <1, modifying the value of for (i) 2 si d (i)/bear (i + M);
wherein β is 1/(α +1), α is for (i)/255.
Further, if bear (i) <1, or bear (i) >255, the value of modified for (i) is r1, and the value of bear (i) is r2, wherein raw (i) ═ r1 × r2, 1< r1< 255; 1< r2< ═ 255.
As shown in fig. 5, an embodiment of the present invention further provides a display device 500, where the display device includes a first display panel and a second display panel that are stacked, pixels of the first display panel correspond to pixels of the second display panel one to one, and an orthographic projection of a pixel of the first display panel on the second display panel coincides with a corresponding pixel, and the display device 500 further includes:
an obtaining module 501, configured to obtain a first image and a second image to be displayed, where the first image is an image that can be viewed within a viewing range of the display device, and the second image is an image that can be viewed outside the viewing range of the display device;
a determining module 502, configured to determine, according to the first image and the second image, first image data input to the first display panel and second image data input to the second display panel.
Further, the determining module 502 is configured to:
determining the first image data and the second image data according to the following expressions:
fore(u)＝raw(u)；
bear(u)＝raw(u)/fore(u)；
fore(i)＝sid(i)/bear(i+M)；
bear(i)＝raw(i)/fore(i)；
wherein 1< ═ i < M, M < ═ u < ═ n, n is the number of pixels of a preset sequence, and the preset sequence is a row or a column;
for (u) is a gray-scale value of the u-th pixel of the predetermined sequence of the first display panel;
for (i) is a gray-scale value of the ith pixel of the preset sequence of the first display panel;
bear (i + M) is the gray-scale value of the i + M th pixel of the preset sequence of the second display panel;
bear (i) is the gray-scale value of the ith pixel of the preset sequence of the second display panel;
raw (u) is a gray-scale value of the u-th pixel of the preset sequence of the first image;
raw (i) is a gray-scale value of an ith pixel of the preset sequence of the first image;
sid (i) is a gray-scale value of an ith pixel of the preset sequence of the second image.
If the value of for (i) is not greater than 255, then the value of for (i) is corrected to be β × sid (i)/bear (i + M);
if for (i) <1, modifying the value of for (i) 2 si d (i)/bear (i + M);
wherein β is 1/(α +1), α is for (i)/255.
Further, if bear (i) <1, or bear (i) >255, the value of modified for (i) is r1, and the value of bear (i) is r2, wherein raw (i) ═ r1 × r2, 1< r1< 255; 1< r2< ═ 255.
It should be noted that any implementation manner in the method embodiment in the embodiment shown in fig. 1 may be implemented by the display device in the embodiment, and achieve the same beneficial effects, and will not be described herein again.
In this embodiment, a first image and a second image to be displayed are obtained, where the first image is an image that can be viewed within a viewing range of the display device, and the second image is an image that can be viewed outside the viewing range of the display device; and determining first image data input to the first display panel and second image data input to the second display panel according to the first image and the second image, so that the image seen by a user on the front side of the first display panel is different from the image seen on the side of the first display panel, the purpose of peeping prevention is achieved, and the peeping prevention range can be flexibly adjusted according to actual conditions so as to meet different requirements of the user.
Referring to fig. 6, fig. 6 is a structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 6, the display device 600 includes: a memory 601, a processor 602, and a computer program stored on the memory 601 and executable on the processor 602, wherein,
the processor 602 is configured to read the computing program in the memory 601, and execute the following processes: acquiring a first image and a second image to be displayed, wherein the first image is an image which can be viewed within the viewing range of the display device, and the second image is an image which can be viewed outside the viewing range of the display device;
determining first image data input to the first display panel and second image data input to the second display panel from the first image and the second image.
Further, the processor 602, when executing the determining of the first image data input to the first display panel and the second image data input to the second display panel according to the first image and the second image, specifically executes:
determining the first image data and the second image data according to the following expressions:
fore(u)＝raw(u)；
bear(u)＝raw(u)/fore(u)；
fore(i)＝sid(i)/bear(i+M)；
bear(i)＝raw(i)/fore(i)；
wherein 1< ═ i < M, M < ═ u < ═ n, n is the number of pixels of a preset sequence, and the preset sequence is a row or a column;
for (u) is a gray-scale value of the u-th pixel of the predetermined sequence of the first display panel;
for (i) is a gray-scale value of the ith pixel of the preset sequence of the first display panel;
bear (i + M) is the gray-scale value of the i + M th pixel of the preset sequence of the second display panel;
bear (i) is the gray-scale value of the ith pixel of the preset sequence of the second display panel;
raw (u) is a gray-scale value of the u-th pixel of the preset sequence of the first image;
raw (i) is a gray-scale value of an ith pixel of the preset sequence of the first image;
sid (i) is a gray-scale value of an ith pixel of the preset sequence of the second image.
If the value of for (i) is not greater than 255, then the value of for (i) is corrected to be β × sid (i)/bear (i + M);
if for (i) <1, modifying the value of for (i) 2 si d (i)/bear (i + M);
wherein β is 1/(α +1), α is for (i)/255.
Further, if bear (i) <1, or bear (i) >255, the value of modified for (i) is r1, and the value of bear (i) is r2, wherein raw (i) ═ r1 × r2, 1< r1< 255; 1< r2< ═ 255.
It should be noted that any implementation manner in the method embodiment in the embodiment shown in fig. 1 may be implemented by the display device in the embodiment, and achieve the same beneficial effects, and will not be described herein again.
In this embodiment, a first image and a second image to be displayed are obtained, where the first image is an image that can be viewed within a viewing range of the display device, and the second image is an image that can be viewed outside the viewing range of the display device; and determining first image data input to the first display panel and second image data input to the second display panel according to the first image and the second image, so that the image seen by a user on the front side of the first display panel is different from the image seen on the side of the first display panel, the purpose of peeping prevention is achieved, and the peeping prevention range can be flexibly adjusted according to actual conditions so as to meet different requirements of the user.
The embodiment of the invention also provides a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the steps in the display method of the display device provided by the embodiment of the invention are realized.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A display method of a display device, wherein the display device comprises a first display panel and a second display panel which are arranged in a stacked manner, pixels of the first display panel correspond to pixels of the second display panel one by one, and an orthographic projection of the pixels of the first display panel on the second display panel is overlapped with the corresponding pixels, the display method comprising:
acquiring a first image and a second image to be displayed, wherein the first image is an image which can be viewed within the viewing range of the display device, and the second image is an image which can be viewed outside the viewing range of the display device;
determining first image data input to the first display panel and second image data input to the second display panel from the first image and the second image;
wherein, the orthographic projection of the viewing range of the display device on the first display panel is positioned in the first display panel, or the orthographic projection of the viewing range of the display device on the second display panel is positioned in the second display panel; the orthographic projection of the display device outside the viewing range on the first display panel is positioned outside the first display panel, or the orthographic projection of the display device on the second display panel is positioned outside the second display panel.
2. The method according to claim 1, wherein determining first image data input to the first display panel and second image data input to the second display panel from the first image and the second image comprises:
determining the first image data and the second image data according to the following expressions:
fore(u)＝raw(u)；
bear(u)＝raw(u)/fore(u)；
fore(i)＝sid(i)/bear(i+M)；
bear(i)＝raw(i)/fore(i)；
wherein 1< ═ i < M, M < ═ u < ═ n, n is the number of pixels of a preset sequence, and the preset sequence is a row or a column;
for (u) is a gray-scale value of the u-th pixel of the predetermined sequence of the first display panel;
for (i) is a gray-scale value of the ith pixel of the preset sequence of the first display panel;
bear (i + M) is the gray-scale value of the i + M th pixel of the preset sequence of the second display panel;
bear (i) is the gray-scale value of the ith pixel of the preset sequence of the second display panel;
raw (u) is a gray-scale value of the u-th pixel of the preset sequence of the first image;
raw (i) is a gray-scale value of an ith pixel of the preset sequence of the first image;
sid (i) is a gray-scale value of an ith pixel of the preset sequence of the second image.
3. The display method of a display device according to claim 2,
if for (i) >255, modifying the value of for (i) to be β × sid (i)/bear (i + M);
if for (i) <1, modifying the value of for (i) 2 si d (i)/bear (i + M);
wherein β is 1/(α +1), α is for (i)/255.
4. The display method of a display device according to claim 2,
if bear (i) <1, or bear (i) >255, the value of the correction for (i) is r1, the value of bear (i) is r2,
wherein raw (i) ═ r1 × r2, 1< r1< ═ 255; 1< r2< ═ 255.
5. A display device, comprising a first display panel and a second display panel which are stacked, wherein pixels of the first display panel correspond to pixels of the second display panel one to one, and an orthographic projection of the pixels of the first display panel on the second display panel coincides with the corresponding pixels, the display device further comprising:
the device comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring a first image and a second image to be displayed, the first image is an image which can be observed within the viewing range of the display device, and the second image is an image which can be observed outside the viewing range of the display device;
a determination module configured to determine first image data input to the first display panel and second image data input to the second display panel from the first image and the second image;
wherein, the orthographic projection of the viewing range of the display device on the first display panel is positioned in the first display panel, or the orthographic projection of the viewing range of the display device on the second display panel is positioned in the second display panel; the orthographic projection of the display device outside the viewing range on the first display panel is positioned outside the first display panel, or the orthographic projection of the display device on the second display panel is positioned outside the second display panel.
6. The display device of claim 5, wherein the determining module is configured to:
determining the first image data and the second image data according to the following expressions:
fore(u)＝raw(u)；
bear(u)＝raw(u)/fore(u)；
fore(i)＝sid(i)/bear(i+M)；
bear(i)＝raw(i)/fore(i)；
wherein 1< ═ i < M, M < ═ u < ═ n, n is the number of pixels of a preset sequence, and the preset sequence is a row or a column;
for (u) is a gray-scale value of the u-th pixel of the predetermined sequence of the first display panel;
for (i) is a gray-scale value of the ith pixel of the preset sequence of the first display panel;
bear (i + M) is the gray-scale value of the i + M th pixel of the preset sequence of the second display panel;
bear (i) is the gray-scale value of the ith pixel of the preset sequence of the second display panel;
raw (u) is a gray-scale value of the u-th pixel of the preset sequence of the first image;
raw (i) is a gray-scale value of an ith pixel of the preset sequence of the first image;
sid (i) is a gray-scale value of an ith pixel of the preset sequence of the second image.
7. The display device according to claim 6,
if for (i) >255, modifying the value of for (i) to be β × sid (i)/bear (i + M);
if for (i) <1, modifying the value of for (i) 2 si d (i)/bear (i + M);
wherein β is 1/(α +1), α is for (i)/255.
8. The display device according to claim 6,
if bear (i) <1, or bear (i) >255, the value of the correction for (i) is r1, the value of bear (i) is r2,
wherein raw (i) ═ r1 × r2, 1< r1< ═ 255; 1< r2< ═ 255.
9. A display device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps in the display method of the display device according to any one of claims 1 to 4.
10. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements the steps in the display method of the display apparatus according to any one of claims 1 to 4.
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