How to operate the display panel and the display panel

Abstract

The present invention provides an operation method of a display panel and a display panel. The operation method comprises the following steps: setting a display screen to include encrypted data and an encrypted border surrounding the encrypted data; making the difference between the grayscale value of the encrypted data and the grayscale value of the encrypted border greater than a preset value; and driving a pixel array to display the display screen.

Description

Technical Field

[0001] The present invention relates to an operation method of a display panel and a display panel, and in particular to an operation method of a display panel capable of photographing displayed encrypted data and a display panel. Background Art

[0002] The encrypted data can be embedded in the digital data in the form of a watermark to protect the aforementioned digital data. Generally speaking, the encrypted data has a high grayscale value and a low grayscale value that are different from the digital data or the background data, and switches between the aforementioned different grayscale values ​​according to a specific refresh frequency to form a flickering effect. The grayscale value difference between the current encrypted data and other data must be greater than a certain difference in order for the encrypted data to be captured by the camera together with the aforementioned data. However, when the aforementioned grayscale value difference increases, the grayscale value range that can be set for the encrypted data will decrease. Summary of the invention

[0003] The embodiment of the present invention provides an operating method of a display panel, which enables a display screen to be photographed to reduce the risk of the displayed data being stolen or peeped, and also avoids reducing the grayscale value range that can be set for encrypted data.

[0004] The operating method of the embodiment of the present invention includes the following steps: setting the display screen to include encrypted data and an encrypted border surrounding the encrypted data; making the difference between the grayscale value of the encrypted data and the grayscale value of the encrypted border greater than a preset value; and driving the pixel array to display the display screen.

[0005] Another embodiment of the present invention provides a display panel. The display panel includes a pixel array and a timing controller. The timing controller is coupled to the pixel array. The timing controller executes the aforementioned operation method.

[0006] Based on the above, the operating method of the display panel and the display panel of the embodiment of the present invention can highlight the display effect of the encrypted data by encrypting the border, and the display screen can be completely captured by the camera without increasing the grayscale value difference between the encrypted data and the remaining data in the display screen. Therefore, the risk of the display screen being stolen or peeped can be reduced, and at the same time, the reduction of the grayscale value range that can be set for the encrypted data can be avoided.

[0007] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a flow chart of an operating method of a display panel according to an embodiment of the present invention.

[0009] Figure 2is a block diagram of a display panel according to an embodiment of the present invention.

[0010] Figure 3 is a flow chart of an operating method of a display panel according to another embodiment of the present invention.

[0011] Figure 4 is a schematic diagram of a display screen according to an embodiment of the present invention.

[0012] The reference numerals are as follows:

[0013] 200: Display panel

[0014] 210: Pixel array

[0015] 220: Timing controller

[0016] 400: Display screen

[0017] BG: General data

[0018] E1_1~E1_2: Encrypted data

[0019] E2_1~E2_2: Encrypted border

[0020] S110~S130, S310~S370: Steps DETAILED DESCRIPTION

[0021] Some embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The referenced element symbols in the following description will be regarded as the same or similar elements when the same element symbols appear in different drawings. These embodiments are only part of the present invention and do not disclose all possible implementation methods of the present invention. More specifically, these embodiments are only examples in the claims of the present invention.

[0022] Figure 1 is a flow chart of an operation method of a display panel according to an embodiment of the present invention. Figure 1 , the display panel can perform the following steps S110 to S130 to operate. In this embodiment, the display panel can be, for example, a light-emitting diode (LED) or an organic light-emitting diode (OLED) to provide a display function. In some embodiments, the display panel can be, for example, a liquid crystal display (LCD) and a display panel that uses a cold cathode fluorescent lamp (CCFL) or a light-emitting diode as a backlight device to provide a display function.

[0023] In this embodiment, steps S110 to S130 may be applied to the following exemplary situations: In this embodiment, the display panel may display a display screen with encrypted data according to usage requirements.

[0024] In step S110, the display panel may set a display screen to include encrypted data and an encrypted border surrounding the encrypted data. In this embodiment, the encrypted data and the encrypted border may be, for example, a watermark (or digital watermark) to indicate the ownership of the general data. The encrypted data and the encrypted border may overlap with the general data to form a display screen to protect the general data.

[0025] In this embodiment, the encrypted data may be, for example, encrypted text or an encrypted graphic. In this embodiment, the encrypted border may be, for example, a bottom frame graphic, or a border graphic extending outward from the encrypted data to surround the encrypted data. In other words, the encrypted border may be any geometric figure surrounding the encrypted data.

[0026] In step S120, the display panel can make the difference between the grayscale value of the encrypted data and the grayscale value of the encrypted border greater than a preset value. In this embodiment, the grayscale value of the encrypted data is greater than the grayscale value of the encrypted border. In some embodiments, the grayscale value of the encrypted data is less than the grayscale value of the encrypted border.

[0027] It should be noted that there is a minimum difference between the grayscale value of the encrypted data and the grayscale value of the encrypted border (i.e., the aforementioned preset value) so that the human eye and / or a machine (e.g., a camera) can distinguish the encrypted data, the encrypted border, and / or the general data. On the other hand, since the encrypted data is already distinguishable from the encrypted border and / or the general data, the grayscale value of the encrypted data does not need to be increased or decreased to a certain difference value based on the general data so that the encrypted data can be distinguished from the general data. In this way, the encrypted border can avoid the reduction of the grayscale value range that can be set for the encrypted data.

[0028] In step S130 , the display panel may drive a pixel array in the display panel to display a display image.

[0029] It is worth mentioning that the encrypted border can highlight the display effect of the encrypted data. In this way, the display panel does not need to change the grayscale value of the encrypted data to make the grayscale value between the encrypted data and the general data greater than a certain difference, so that the display screen (including the encrypted data) can be captured by the camera in its entirety to reduce the risk of the display screen being stolen or peeped. In addition, since the grayscale value of the encrypted data does not need to be changed, it can avoid reducing the grayscale value range that can be set for the encrypted data.

[0030] Figure 2 is a block diagram of a display panel according to an embodiment of the present invention. Figure 2 The display panel 200 includes a pixel array 210 and a timing controller 220. The pixel array 210 is coupled to the timing controller 220. In this embodiment, the display panel 200 can refer to Figure 1 The related description of the display panel in the embodiment can be deduced by analogy, so it will not be repeated here.

[0031] In the present embodiment, the pixel array 210 includes a plurality of light-emitting units. The number and arrangement of these light-emitting units can be arranged and set according to actual needs. In the present embodiment, the light-emitting unit of the pixel array 210 may be, for example, a light-emitting diode (LED), a micro-LED, an organic light-emitting diode (OLED), an inorganic light-emitting diode (ILED), a sub-millimeter light-emitting diode (Mini-LED), a micro-LED (Micro-LED), an electroluminescence (EL) unit, a laser diode (Laser Diode) or other types of light-emitting units, and the present embodiment is not limited thereto.

[0032] In the present embodiment, the timing controller 220 can control the pixel array 210. The timing controller 220 can be, for example, a central processing unit (CPU), or other programmable general-purpose or special-purpose microprocessors (Microprocessors), digital signal processors (Digital Signal Processors, DSPs), programmable controllers, application specific integrated circuits (Application Specific Integrated Circuits, ASICs), programmable logic devices (Programmable Logic Devices, PLDs) or other similar devices or combinations of these devices, which can load and execute related firmware or software to achieve control functions.

[0033] In this embodiment, the timing controller 220 may execute the following steps: Figure 1 The operating method shown in the embodiment. Regarding the implementation details of the above-mentioned operating method, Figure 1 The embodiments and multiple implementations have been described in detail and will not be repeated here.

[0034] Figure 3 is a flow chart of an operating method of a display panel according to another embodiment of the present invention. Figure 4is a schematic diagram of a display screen according to an embodiment of the present invention. Figure 3 as well as Figure 4 The display panel can perform the following steps S310 to S370 to operate so that the display panel displays the display screen 400. In this embodiment, the display panel can refer to Figure 1 The display panel and / or Figure 2 The relevant description of the display panel 200 of the embodiment can be deduced by analogy, and thus will not be repeated here.

[0035] In step S310 , the display panel may set the display image 400 to include the encrypted data and the encrypted border surrounding the encrypted data.

[0036] In the present embodiment, the encrypted data may include a plurality of encrypted data E1_1 to E1_2. The encrypted border may include a plurality of encrypted borders E2_1 to E2_2 surrounding each encrypted data E1_1 to E1_2. That is, each encrypted data E1_1 to E1_2 and each corresponding encrypted border E2_1 to E2_2 may be, for example, a watermark. The encrypted data E1_1 to E1_2 and the corresponding encrypted borders E2_1 to E2_2 may be dispersedly arranged in the display screen 400 to overlap with the general data BG (and / or background data) to form the display screen 400 to protect the general data BG. The number and arrangement of the encrypted data E1_1 to E1_2 and the surrounding encrypted data E1_1 to E1_2 are merely examples and are not limited thereto.

[0037] It should be noted that the grayscale values ​​of the encrypted data E1_1 and E1_2 are different. The grayscale values ​​of the encrypted borders E2_1 and E2_2 are different. The grayscale value of the encrypted data E1_1 can be the same as the grayscale value of the encrypted border E2_2 (for example, the first grayscale value). The grayscale value of the encrypted data E1_2 can be the same as the grayscale value of the encrypted border E2_1 (for example, the second grayscale value). In this embodiment, the display panel can switch the watermark to the encrypted data E1_1 (having the first grayscale value) and the corresponding encrypted border E2_1 (having the second grayscale value) according to the refresh frequency, or switch to the encrypted data E1_2 (having the second grayscale value) and the corresponding encrypted border E2_2 (having the first grayscale value) to form a flickering effect.

[0038] In this embodiment, the encrypted border E2_1 can be any geometric figure surrounding the encrypted data E1_1. In this embodiment, the minimum distance between the encrypted border E2_1 and the encrypted data E1_1 is greater than a preset width. For example, when the encrypted border E2_1 is a bottom frame figure (e.g. Figure 4The minimum spacing between the outer frame and the inner frame of the encrypted border E2_1 (i.e., the border adjacent to the encrypted data E1_1) is greater than the preset width. For another example, in some embodiments, when the encrypted border E2_1 is a border graphic extending outward from the encrypted data E1_1 to surround the encrypted data E1_1 (e.g., an "X"-shaped border), the width of the encrypted border E2_1 is greater than the preset width.

[0039] In this embodiment, the encrypted data E1_2 and the encrypted border E2_2 can refer to the related description of the encrypted data E1_1 and the encrypted border E2_1 and be deduced by analogy, so they are not repeated here and in the following embodiments.

[0040] It should be noted that in this embodiment, the aforementioned preset width is the distance covering three adjacent pixel units in the pixel array, so that the encrypted border E2_1 is different from the encrypted data E1_1. In this embodiment, the aforementioned pixel unit can be, for example, a single-color or multi-color unit composed of a single or multiple light-emitting units.

[0041] In step S320, the display panel can make the difference between the grayscale value of the encrypted data E1_1, E1_2 and the grayscale value of the corresponding encrypted borders E2_1, E2_2 greater than a preset value. In this embodiment, the grayscale value of the encrypted data E1_1 is less than the grayscale value of the encrypted border E2_1. The grayscale value of the encrypted data E1_2 is greater than the grayscale value of the encrypted border E2_2.

[0042] It should be noted that the minimum difference between the grayscale value of the encrypted data E1_1 and the grayscale value of the encrypted border E2_1 (i.e., the aforementioned preset value) is equal to (or substantially equal to) 20 grayscales. In other words, the difference between the penetration rate (corresponding to the grayscale value) of the encrypted data E1_1 and the penetration rate of the encrypted border E2_1 is (substantially) above 20%. In this embodiment, since the grayscale value difference between the encrypted data E1_1 and the encrypted border E2_1 exceeds 20 grayscales, the human eye can distinguish the encrypted data E1_1 in the display screen 400, and the camera can also capture the encrypted data E1_1.

[0043] In step S330 , the display panel may set the display image 400 to include the general data BG overlapping the encrypted data E1_1 , E1_2 and the encrypted borders E2_1 , E2_2 .

[0044] In step S340 , the display panel may make the grayscale value of the general data BG between the grayscale values ​​of the encrypted data E1_1 , E1_2 and the grayscale values ​​of the corresponding encrypted borders E2_1 , E2_2 .

[0045] For example, in the present embodiment, the grayscale value of the general data BG is 245, for example. The grayscale value of the encrypted data E1_1 is 235, for example, and the grayscale value of the encrypted border E2_1 is 255, for example. The grayscale value of the encrypted data E1_2 is 255, for example, and the grayscale value of the encrypted border E2_2 is 235, for example. It should be noted that, in the present embodiment, the difference between the encrypted data E1_1 and the encrypted border E2_1 is 20 grayscales. The difference between the encrypted data E1_1 and the general data BG is 10 grayscales, so the grayscale value of the encrypted data E1_1 does not need to be increased or decreased by a certain difference (for example, 20 grayscales) relative to the general data BG to be highlighted by the encrypted border E2_1, and the grayscale value range that can be set for the encrypted data E1_1 can be avoided from being reduced.

[0046] In this embodiment, the grayscale value of the general data BG is equal to the average of the grayscale value of the encrypted data E1_1 and the grayscale value of the encrypted border E2_1. The grayscale value of the general data BG is equal to the average of the grayscale value of the encrypted data E1_2 and the grayscale value of the encrypted border E2_2. In other words, the energy sum of the encrypted data E1_1 and the encrypted border E2_1 is equal to the energy sum of the general data BG, so that the encrypted data E1_1 and the encrypted border E2_1 can be embedded in the general data BG in the form of a watermark.

[0047] In some embodiments, in step S350, the display panel may set the display image 400 to include an additional encryption border (not shown) surrounding the encryption borders E2_1 and E2_2. Figure 4 ). The additional encrypted border may be, for example, a bottom frame graphic, or a frame graphic extending outward from the encrypted border E2_1 to surround the encrypted border E2_1. In other words, the additional encrypted border may be any geometric figure surrounding the encrypted border E2_1, and forming a multi-layered border with the encrypted border E2_1. The encrypted border E2_2 may refer to the relevant description of the encrypted border E2_1 and be deduced by analogy, so it will not be repeated here and in the following embodiments.

[0048] In some embodiments, there may be multiple encrypted borders E2_1, and there may also be multiple additional encrypted borders surrounding the encrypted border E2_1. In some embodiments, one encrypted border E2_1 surrounds the encrypted data E1_1. The remaining multiple encrypted borders E2_1 surround each additional encrypted border in sequence, so as to intersperse with these additional encrypted borders and surround each other to form multiple layers of borders.

[0049] In some embodiments, in step S360, the display panel can make the difference between the grayscale values ​​of the encrypted borders E2_1 and E2_2 and the grayscale values ​​of the corresponding additional encrypted borders greater than a preset value. In some embodiments, the grayscale value of the encrypted border E2_1 is less than the grayscale value of the additional encrypted border surrounding the encrypted border E2_1. The grayscale value of the encrypted border E2_2 is greater than the grayscale value of the additional encrypted border surrounding the encrypted border E2_2.

[0050] It should be noted that the minimum difference between the grayscale value of the encrypted border E2_1 and the grayscale value of the corresponding additional encrypted border (i.e., the aforementioned preset value) is equal to (or substantially equal to) 20 grayscales. In other words, the difference between the penetration rates (corresponding to the grayscale values) of the aforementioned two is (substantially) above 20%. In some embodiments, since the grayscale value difference between the encrypted data E1_1 and the encrypted border E2_1 exceeds 20 grayscales, and the grayscale value difference between the encrypted border E2_1 and the corresponding additional encrypted border also exceeds 20 grayscales, the human eye can distinguish the encrypted data E1_1 in the display screen 400, and the camera can also capture the encrypted data E1_1.

[0051] In step S370 , the display panel may drive a pixel array in the display panel to display a display picture 400 .

[0052] In summary, the operating method of the display panel and the display panel of the embodiment of the present invention can highlight the display effect of the encrypted data by encrypting the border, and the display screen including the encrypted data can be completely captured by the camera to reduce the risk of the display screen being stolen or peeped. In some embodiments, the grayscale value range of the encrypted data can be avoided from being reduced by making the difference between the grayscale value of the encrypted border and the encrypted data greater than a preset value. In some embodiments, the display effect of the encrypted data can be highlighted by adding an encrypted border and an encrypted border.

[0053] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Those skilled in the art may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the appended claims.

Claims

1. A method for operating a display panel, comprising: Setting a display frame to include encrypted data and an encrypted border surrounding the encrypted data; Make the difference between the grayscale value of the encrypted data and the grayscale value of the encrypted frame greater than a preset value; driving a pixel array to display the display image; Setting the display frame to include general data overlapping the encrypted data and the encrypted border; and The grayscale value of the general data is made between the grayscale value of the encrypted data and the grayscale value of the encrypted frame. 2 . The operating method of a display panel as claimed in claim 1 , wherein the grayscale value of the general data is equal to an average value of the grayscale value of the encrypted data and the grayscale value of the encrypted frame. 3 . The operating method of the display panel as claimed in claim 1 , wherein the preset value is equal to 20 gray levels. 4 . The method for operating a display panel as claimed in claim 1 , wherein a minimum distance between the encrypted border and the encrypted data is greater than a preset width. 5 . The method for operating a display panel as claimed in claim 4 , wherein the preset width is a distance covering three adjacent pixel units in the pixel array.

6. An operating method for a display panel as described in claim 1, wherein the encrypted data includes multiple encrypted data, the encrypted border includes multiple encrypted borders surrounding each of the encrypted data, the grayscale values ​​of the multiple encrypted data are different, and the difference between the grayscale value of each of the encrypted data and the corresponding grayscale value of each of the encrypted borders is greater than the preset value.

7. The method for operating a display panel according to claim 1, further comprising: Setting the display frame to include an additional encrypted border surrounding the encrypted border; The difference between the grayscale value of the encrypted border and the grayscale value of the additional encrypted border is made greater than the preset value.

8. The method for operating a display panel as claimed in claim 7, wherein the number of the encrypted border and the additional encrypted border are both multiple, one of the multiple encrypted borders surrounds the encrypted data, and the other of the multiple encrypted borders surround each of the additional encrypted borders in sequence.

9. A display panel, comprising: a pixel array; as well as A timing controller is coupled to the pixel array and is used to execute the operating method as claimed in claim 1.

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