TWI838113B - Display device - Google Patents

Abstract

A display device includes a display panel and a controller. The display panel is configured for displaying a frame, the frame includes a pattern area and a first area, the first area is adjacent to the pattern area, and the first area includes a number of first blocks. The controller is configured for: at a first time point, controlling adjacent a first one and a second one of the first blocks to display a first gray-scale brightness and a second gray-scale brightness different from the first gray-scale brightness respectively; at the second time point, controlling adjacent the first one and the second one of the first blocks to display a third gray-scale brightness and a fourth gray-scale brightness different from the third gray-scale brightness respectively. The first gray-scale brightness and the third gray-scale brightness are different, an average value of the first gray-scale brightness and the third gray-scale brightness is equal to a background grayscale brightness, and an average value of the second gray-scale brightness and the fourth gray-scale brightness is equal to the background grayscale brightness.

Description

Display device

This disclosure relates to a display device.

The display device can display a picture according to a digital signal, and the picture contains all the information of the digital signal. However, based on confidentiality or privacy considerations, the user hopes that a secret information in the display picture will not be displayed from the display device (the naked eye cannot observe the secret information of the display picture), but also hopes that the picture taken by the display picture can present the secret information (the naked eye can observe the secret information of the picture). Therefore, how to propose a display device that can meet the confidentiality or privacy requirements is one of the goals of the industry in this field.

Therefore, the present disclosure proposes a display device that can improve the aforementioned known problems.

An embodiment of the present disclosure proposes a display device. The display device includes a display panel and a controller. The display panel is used to display a screen, and the screen includes a pattern area and a first area, the first area is adjacent to the pattern area, and the first area includes a plurality of first blocks. The controller is used to: at a first time point, control a first and a second adjacent to these first blocks to respectively display a first grayscale brightness and a second grayscale brightness that are different; and, at a second time point, control the first and the second to respectively display a third grayscale brightness and a fourth grayscale brightness that are different. The first grayscale brightness is different from the third grayscale brightness, the average value of the first grayscale brightness and the third grayscale brightness is equal to a background grayscale brightness, and the average value of the second grayscale brightness and the fourth grayscale brightness is equal to the background grayscale brightness.

Another embodiment of the present disclosure provides a display device. The display device includes a display panel and a controller. The display panel is used to display a picture, and the picture includes a pattern area and a first area, the first area is adjacent to the pattern area, and the pattern area includes a plurality of pattern blocks. The controller is used to: at a first time point, control a first, a second, and a third of these pattern blocks to respectively display a first pattern grayscale brightness, a second pattern grayscale brightness, and a third pattern grayscale brightness; at a second time point, control the first, the second, and the third to respectively display a fourth pattern grayscale brightness, a fifth pattern grayscale brightness, and a sixth pattern grayscale brightness; and, at a third time point, control the first, the second, and the third to respectively display a seventh pattern grayscale brightness, an eighth pattern grayscale brightness, and a ninth pattern grayscale brightness. The grayscale brightness of the first pattern, the grayscale brightness of the second pattern, and the grayscale brightness of the third pattern are different, and the average value of the grayscale brightness of the first pattern, the grayscale brightness of the second pattern, and the grayscale brightness of the third pattern is equal to the grayscale brightness of the background. The grayscale brightness of the fourth pattern, the grayscale brightness of the fifth pattern, and the grayscale brightness of the sixth pattern are different, and the average value of the grayscale brightness of the fourth pattern, the grayscale brightness of the fifth pattern, and the grayscale brightness of the sixth pattern is equal to the background grayscale brightness. The grayscale brightness of the seventh pattern, the grayscale brightness of the eighth pattern, and the grayscale brightness of the ninth pattern are different, and the average value of the grayscale brightness of the seventh pattern, the grayscale brightness of the eighth pattern, and the grayscale brightness of the ninth pattern is equal to the background grayscale brightness.

In order to better understand the above and other aspects of this disclosure, the following is a specific example, and the attached drawings are used to explain in detail as follows:

100: Display device

110: Display panel

120: Controller

F: Screen

F1, F2, F3: Pattern area

F11, F21, F41: Pattern block

F21a: Third party

F21b: The fourth person

G11, G21: First gray level brightness

G12, G22: Second gray level brightness

G13, G23: Third gray level brightness

G14, G24: Fourth gray level brightness

G15: Fifth gray level brightness

G16: Sixth gray level brightness

G17: Seventh gray level brightness

G18: Eighth gray level brightness

GB: Background grayscale brightness

GF11, GF21: Brightness of the first pattern grayscale

GF12, GF22: Second pattern grayscale brightness

GF13, GF23: Third pattern grayscale brightness

GF14, GF24: Fourth pattern grayscale brightness

M1,M2,M3: Zone 1

M11,M21: first block

M11a, N11a: The first

M11b, N11b: The second one

N1, N2: Second Zone

N11, N21: The second block

P1: Pixels

Figure 1 is a schematic diagram of a display device according to an embodiment of the present disclosure.

Figure 2A is a partial schematic diagram of the screen displayed by the display device in Figure 1 at the first time point.

Figure 2B is a schematic diagram showing the screen of Figure 2A at the second time point.

Figure 3A is a partial schematic diagram of a screen displayed by a display device at a first time point according to another embodiment of the present invention.

Figure 3B is a schematic diagram showing the screen of Figure 3A at the second time point.

Figure 4A is a partial schematic diagram of a screen displayed by a display device at a first time point according to another embodiment of the present invention.

Figure 4B is a schematic diagram showing the screen of Figure 4A at the second time point.

Figure 5A is a partial schematic diagram of a screen displayed by a display device at a first time point according to another embodiment of the present invention.

Figure 5B is a schematic diagram showing the screen of Figure 5A at the second time point.

Figure 5C is a schematic diagram showing the screen of Figure 5A at the third time point.

Figure 6A shows the grayscale brightness changes of the pattern block at different time points in Figures 5A to 5C.

Figure 6B shows the average grayscale brightness of the pattern blocks in Figures 5A to 5C at different time points.

In the drawings, the thickness of layers, films, panels, regions, etc., is exaggerated for clarity. Throughout the specification, the same figure reference numerals represent the same elements. It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to another element, or an intermediate element may also exist. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intermediate elements. As used herein, "connected" may refer to physical and/or electrical connections. Furthermore, "electrical connection" or "coupling" may be the presence of other elements between two elements.

The terms used herein are for the purpose of describing specific embodiments only and are not limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms, including "at least one". " or "means" and/or". As used herein, the term "and/or" includes any and all combinations of one or more of the relevant listed items. It should also be understood that when used in this specification, the term "includes" and/or "includes" specifies the presence of the features, regions, wholes, steps, operations, elements, and/or parts, but does not exclude the presence or addition of one or more other features, regions, wholes, steps, operations, elements, parts, and/or combinations thereof.

Additionally, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element, as shown in the figures. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in one figure is flipped, then the elements described as being on the "lower" side of other elements will be oriented on the "upper" side of the other elements. Thus, the exemplary term "lower" can include both "lower" and "upper" orientations, depending on the particular orientation of the figure. Similarly, if the device in one figure is flipped, then the elements described as being "below" or "beneath" other elements will be oriented as being "above" other elements. Thus, the exemplary term "below" or "beneath" can include both "upper" and "lower" orientations.

As used herein, "approximately", "approximately", or "substantially" includes the stated value and the average value within an acceptable deviation range of a particular value determined by a person of ordinary skill in the art, taking into account the measurement in question and the specific amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "approximately" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, "approximately", "approximately", or "substantially" as used herein can select a more acceptable deviation range or standard deviation based on the optical properties, etching properties, or other properties, and can apply to all properties without using one standard deviation.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by ordinary technicians in the field to which the present invention belongs. It will be further understood that those terms as defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and the present invention, and will not be interpreted as an idealized or overly formal meaning unless expressly defined as such in this document.

Please refer to Figures 1 to 2B. Figure 1 is a schematic diagram of a display device 100 according to an embodiment of the present disclosure. Figure 2A is a partial schematic diagram of a screen F displayed by the display device 100 of Figure 1 at a first time point. Figure 2B is a schematic diagram of the screen F of Figure 2A at a second time point. The display device 100 can be applied to various products with display requirements, such as laptops, tablet computers, desktop computers, and home appliances.

As shown in FIG. 1, the display device 100 includes a display panel 110 and a controller 120. As shown in FIG. 2A, the display panel 110 is used to display a screen F, and the screen F includes a first area M1 (e.g., the annular thick frame area surrounding the pattern area F1 shown in FIG. 2A), a second area N1 (e.g., the area surrounded by the pattern area F1 shown in FIG. 2A) and at least one pattern area F1 (e.g., the non-section area shown in FIG. 2A, the area between the first area M1 and the second area N1). The first area M1 is adjacent to the pattern area F1. The first area M1 includes a plurality of first blocks M11. The controller 120 is used to: at a first time point, as shown in FIG. 2A, control the adjacent first M11a and second M11b in the first blocks M11 to respectively display different first grayscale brightness (grayscale value) G11 and second grayscale brightness G12; and at a second time point, as shown in FIG. 2B, control the first M11a and second M11b to respectively display different third grayscale brightness G13 and fourth grayscale brightness G14. The first grayscale brightness G11 is different from the third grayscale brightness G13, and the average value of the first grayscale brightness G11 and the third grayscale brightness G13 is substantially equal to the background grayscale brightness GB, and the average value of the second grayscale brightness G12 and the fourth grayscale brightness G14 is substantially equal to the background grayscale brightness GB. Through the grayscale change design of the first area M1, the contrast (grayscale difference) between the first area M1 and the pattern area F1 can be increased, so that the camera (not shown) can clearly identify the grayscale changes of the picture F at two points in time and can capture a clear pattern area F1.

As shown in FIG. 2A , the background grayscale brightness GB is, for example, the display grayscale brightness of one of the pixels adjacent to the first region M1 (for example, the pixel P1 in FIG. 2A ). The background grayscale brightness GB of different regions in the frame F may be different.

Although Figure 1 shows the appearance of the pattern area F1 and the first area M1, the scanning frequency of the screen may be greater than the flicker frequency that the human eye can discern, making it difficult or impossible for the human eye to discern the flicker changes of the pattern area F1 and the first area M1 at two points in time.

The aforementioned first M11a and second M11b are any two adjacent ones in several or all first blocks M11. In the embodiment, at a time point, the grayscale brightness of any two adjacent ones in several or all first blocks M11 of the first area M1 is different, so that the first area M1 is a mosaic pattern area. The mosaic pattern area can reduce the recognition of the pattern area F1 by the human eye. In addition, a first block M11 can correspond to one or some of the several pixels of the display panel 110. In addition, the first time point and the second time point in this article respectively represent any two adjacent ones of several time points in the display process of the screen F, wherein the time interval between the two adjacent time points can be determined according to the screen scanning frequency, and the embodiment of the present invention is not limited.

In addition, the two grayscale brightnesses of a block of the mosaic pattern area (e.g., the first one M11a) at two time points are respectively a higher grayscale brightness (e.g., the third grayscale brightness G13) and a lower grayscale brightness (e.g., the first grayscale brightness G11), wherein the higher grayscale brightness and the lower grayscale brightness are determined according to the background grayscale brightness GB. For example, a set of higher grayscale brightness and lower grayscale brightness corresponding to the background grayscale brightness GB can be obtained by looking up a table, a curve or an equation.

In this embodiment, the pattern area F1 is, for example, text, letters, symbols, numbers, or other patterns consisting of straight lines, curves, or a combination thereof. The pattern area F1 can also be called a watermark. The first area M1 is adjacent to the outer edge of the pattern area F1, and its shape can conform to the shape of the outer edge of the pattern area F1. In one embodiment, the first area M1 can be adjacent to at least a portion of the entire outer contour of the pattern area F1. In another embodiment, the first area M1 can be adjacent to the inner edge of the pattern area F1, and its shape can conform to the shape of the inner edge of the pattern area F1, and the first area M1 can be adjacent to at least a portion of the entire inner contour of the pattern area F1.

In one embodiment, the average value of the first grayscale brightness G11 and the third grayscale brightness G13 is substantially equal to the background grayscale brightness GB. Therefore, visually, the displayed grayscale of the first area M1 at two points in time is substantially equal to the background grayscale brightness GB, making it difficult for the human eye to discern the grayscale change of the first area M1 at two points in time. In one embodiment, the first grayscale brightness G11 and the third grayscale brightness G13 may be substantially equal, for example, the first grayscale brightness G11 and the third grayscale brightness G13 are both equal to the background grayscale brightness GB. In another embodiment, the first grayscale brightness G11 and the third grayscale brightness G13 may be different, and the average value of the first grayscale brightness G11 and the third grayscale brightness G13 is substantially equal to the background grayscale brightness GB. In summary, as long as the average value of the first grayscale brightness G11 and the third grayscale brightness G13 is roughly equal to the background grayscale brightness GB, the third grayscale brightness G13 can be greater than, less than or equal to the first grayscale brightness G11.

In one embodiment, the average value of the second grayscale brightness G12 and the fourth grayscale brightness G14 is substantially equal to the background grayscale brightness GB. Thus, visually, the display grayscale of the first area M1 at two points in time is substantially equal to the background grayscale brightness GB, making it difficult for the human eye to discern the grayscale change of the first area M1 at two points in time. In one embodiment, the second grayscale brightness G12 and the fourth grayscale brightness G14 may be substantially equal, for example, the second grayscale brightness G12 and the fourth grayscale brightness G14 are both equal to the background grayscale brightness GB. In another embodiment, the second grayscale brightness G12 and the fourth grayscale brightness G14 may be different, and the average value of the second grayscale brightness G12 and the fourth grayscale brightness G14 is substantially equal to the background grayscale brightness GB. In summary, as long as the average value of the second grayscale brightness G12 and the fourth grayscale brightness G14 is roughly equal to the background grayscale brightness GB, the second grayscale brightness G12 can be greater than, less than or equal to the fourth grayscale brightness G14.

As shown in Figures 2A and 2B, the pattern area F1 includes several pattern blocks F11. The controller 120 is further used to: at a first time point, as shown in Figure 2A, control each pattern block F11 to display a first pattern grayscale brightness GF11, and at a second time point, as shown in Figure 2B, control each pattern block F11 to display a third pattern grayscale brightness GF13, wherein the first pattern grayscale brightness GF11 is different from the third pattern grayscale brightness GF13. In one embodiment, the average value of the first pattern grayscale brightness GF11 and the third pattern grayscale brightness GF13 is substantially equal to the background grayscale brightness GB. In this way, visually, the display grayscale of the pattern area F1 at two time points is substantially equal to the background grayscale brightness GB, making it difficult for the human eye to recognize the grayscale change of the pattern area F1 at two time points.

As shown in Figures 2A and 2B, the second area N1 is adjacent to the pattern area F1, for example, adjacent to the inner edge of the pattern area F1, and its shape can conform to the shape of the inner edge of the pattern area F1. In one embodiment, the second area N1 is adjacent to at least a portion of the entire inner contour of the pattern area F1. The aforementioned pattern area F1 is located between the second area N1 and the first area M1. In another embodiment, the second area N1 can be adjacent to the outer edge of the pattern area F1, and its shape can conform to the shape of the outer edge of the pattern area F1, and the second area M2 can be adjacent to at least a portion of the entire outer contour of the pattern area F1.

As shown in FIGS. 2A and 2B , the second area N1 includes a plurality of second blocks N11. The controller 120 is used to: at a first time point, as shown in FIG. 2A , control the adjacent first N11a and second N11b in the second blocks N11 to respectively display the fifth grayscale brightness G15 and the sixth grayscale brightness G16; and at a second time point, as shown in FIG. 2B , control the first N11a and the second N11b to respectively display the seventh grayscale brightness G17 and the eighth grayscale brightness G18. The fifth grayscale brightness G15 is different from the seventh grayscale brightness G17. The average value of the fifth grayscale brightness G15 and the seventh grayscale brightness G17 is substantially equal to the background grayscale brightness GB, and the average value of the sixth grayscale brightness G16 and the eighth grayscale brightness G18 is substantially equal to the background grayscale brightness GB. Through the grayscale change design of the second area N1 and the pattern area F1, the contrast between the second area N1 and the pattern area F1 can be increased, so that the camera (not shown) can clearly identify the grayscale change of the picture F at two points in time, and can capture a clear pattern area F1.

The relationship between the fifth grayscale brightness G15, the sixth grayscale brightness G16, the seventh grayscale brightness G17 and the eighth grayscale brightness G18 can be similar or the same as the relationship between the first grayscale brightness G11, the second grayscale brightness G12, the third grayscale brightness G13 and the fourth grayscale brightness G14, which will not be elaborated here.

In an embodiment, at any time point, the grayscale brightness of any two adjacent ones of several or all second blocks N11 of the second area N1 is different, so that the second area N1 is a mosaic pattern area. In addition, a second block N11 may correspond to one or some of the digital pixels of the display panel 110.

Through the grayscale design of the first area M1, the pattern area F1 and the second area N1, the contrast of the pattern area F1 compared to the first area M1 and the second area N1 can be increased, so that the camera (not shown) can clearly identify the grayscale changes of the picture F at two points in time and can capture a clearer pattern area F1.

Please refer to Figures 3A-3B. Figure 3A is a partial schematic diagram of a screen F displayed by a display device at a first time point according to another embodiment of the present invention, and Figure 3B is a schematic diagram of screen F of Figure 3A at a second time point.

Different from the pattern area F1 in FIG. 2A, the pattern area F2 in this embodiment is a mosaic pattern area.

As shown in FIG. 3A , the screen F of this embodiment includes a first area M2 (e.g., the thick-framed annular area surrounding the pattern area F2 shown in FIG. 3A ), a second area N2 (e.g., the area surrounded by the pattern area F2 shown in FIG. 3A ) and at least one pattern area F2 (e.g., the non-section area shown in FIG. 3A , the area between the first area M2 and the second area N2 ). The pattern area F2 includes a plurality of pattern blocks F21 . In this embodiment, the controller 120 is used to: at a first time point, as shown in FIG. 3A , control the adjacent third party F21a and fourth party F21b in these pattern blocks F21 to respectively display different first pattern grayscale brightness GF21 and second pattern grayscale brightness GF22; and, at a second time point, as shown in FIG. 3B , the third party F21a and fourth party F21b to respectively display different third pattern grayscale brightness GF23 and fourth pattern grayscale brightness GF24. In this embodiment, the first pattern grayscale brightness GF21 is different from the third pattern grayscale brightness GF23, and the average value of the first pattern grayscale brightness GF21 and the third pattern grayscale brightness GF23 is equal to the background grayscale brightness GB, and the average value of the second pattern grayscale brightness GF22 and the fourth pattern grayscale brightness GF24 is equal to the background grayscale brightness GB. In this way, through the grayscale change design of the pattern area F1, the contrast between the first area M1 and the pattern area F1 can be increased, so that the camera (not shown) can clearly identify the grayscale change of the picture F at two points in time, and can capture a clear pattern area F2.

In this embodiment, the second pattern grayscale brightness GF22 and the fourth pattern grayscale brightness GF24 are substantially equal. In another embodiment, the second pattern grayscale brightness GF22 and the fourth pattern grayscale brightness GF24 may be different. However, as long as the average value of the second pattern grayscale brightness GF22 and the fourth pattern grayscale brightness GF24 is equal to the background grayscale brightness GB, the second pattern grayscale brightness GF22 may be greater than, equal to, or less than the second pattern grayscale brightness GF22.

In addition, the average values of the first pattern grayscale brightness GF21 and the second pattern grayscale brightness GF22 are not equal to the background grayscale brightness GB, and the average values of the third pattern grayscale brightness GF23 and the fourth pattern grayscale brightness GF24 are not equal to the background grayscale brightness GB.

The average value of the second pattern grayscale brightness GF22 and the fourth pattern grayscale brightness GF24 is equal to the background grayscale brightness GB. Thus, visually, the displayed grayscale of the pattern area F2 at two points in time is roughly equal to the background grayscale brightness GB, making it difficult for the human eye to discern the grayscale changes of the pattern area F2 at two points in time.

As shown in FIG. 3A, the first area M2 includes a plurality of first blocks M21. In this embodiment, the controller 120 is used to: at a first time point, as shown in FIG. 3A, control each first block M21 to display the first grayscale brightness G21; and at a second time point, as shown in FIG. 3B, control each first block M21 to display the third grayscale brightness G23. In one embodiment, the first grayscale brightness G21 and the third grayscale brightness G23 are different, but can also be substantially equal. As long as the average value of the first grayscale brightness G21 and the third grayscale brightness G23 is substantially equal to the background grayscale brightness GB, the first grayscale brightness G21 can be greater than, equal to, or less than the third grayscale brightness G23.

As shown in FIG. 3A, the second area N2 includes a plurality of second blocks N21. In this embodiment, the controller 120 is used to: at a first time point, as shown in FIG. 3A, control each second block N21 to display the fifth grayscale brightness G25; and at a second time point, as shown in FIG. 3B, control each second block N21 to display the seventh grayscale brightness G27. In one embodiment, the fifth grayscale brightness G25 and the seventh grayscale brightness G27 are substantially equal, but may also be substantially different. As long as the average value of the fifth grayscale brightness G25 and the seventh grayscale brightness G27 is substantially equal to the background grayscale brightness GB, the first grayscale brightness G21 may be greater than, equal to, or less than the third grayscale brightness G23.

Please refer to Figures 4A-4B. Figure 4A is a partial schematic diagram of a screen F displayed by a display device at a first time point according to another embodiment of the present invention, and Figure 4B is a schematic diagram of screen F of Figure 4A at a second time point.

As shown in FIG. 4A, the screen F of this embodiment includes a first area M3 (e.g., the thick annular frame area surrounding the pattern area F2 shown in FIG. 4A), a second area N2 (e.g., the area surrounded by the pattern area F2 shown in FIG. 4A) and at least one pattern area F2 (e.g., the non-section area shown in FIG. 4A, the area between the first area M3 and the second area N2). The screen F of this embodiment has the same or similar features as the screen F of FIG. 3A, and one of the differences is that the first area M3 of this embodiment is a mosaic pattern area. As shown in FIG. 4A, the first area M3 has a grayscale design similar to or the same as the first area M1 of FIG. 2A, which will not be repeated here.

Please refer to Figures 5A-5C and 6A-6B. Figure 5A shows a partial schematic diagram of the display screen F displayed by the display device 100 at a first time point according to another embodiment of the present invention. Figure 5B shows a schematic diagram of the screen F of Figure 5A at a second time point. Figure 5C shows a schematic diagram of the screen F of Figure 5A at a third time point. Figure 6A shows a schematic diagram of the grayscale brightness change of the pattern block at different time points of Figures 5A-5C. Figure 6B shows a schematic diagram of the average grayscale brightness of the pattern block at different time points of Figures 5A-5C.

As shown in Figure 5A, the frame F includes at least one pattern area F4 and a first area (or "background area") M4, wherein the pattern area F4 includes a plurality of pattern blocks F41.

The controller 120 is used to: as shown in FIG. 5A, at a first time point T1, control the first F41a, the second F41b and the third F41c of the pattern blocks F41 to display different first pattern grayscale brightness GF41, second pattern grayscale brightness GF42 and third pattern grayscale brightness GF43 respectively; as shown in FIG. 5B, at a second time point T2, control the first F41a, the second F41b and the third F41c to display different first pattern grayscale brightness GF41, second pattern grayscale brightness GF42 and third pattern grayscale brightness GF43 respectively; The three F41cs respectively display the fourth pattern grayscale brightness GF44, the fifth pattern grayscale brightness GF45 and the sixth pattern grayscale brightness GF46; and, as shown in Figure 5C, at the third time point T3, the first F41a, the second F41b and the third F41c are controlled to respectively display the seventh pattern grayscale brightness GF47, the eighth pattern grayscale brightness GF48 and the ninth pattern grayscale brightness GF49.

As shown in Figures 5A to 5C, the first F41a surrounds the second F41b and the third F41c, and the second F41b surrounds the third F41c. In other embodiments, one of the first F41a, the second F41b, and the third F41c surrounds the other two of the first F41a, the second F41b, and the third F41c.

As shown in FIGS. 5A to 5C, the first pattern grayscale brightness GF41, the second pattern grayscale brightness GF42 and the third pattern grayscale brightness GF43 are different, and the average value of the first pattern grayscale brightness GF41, the second pattern grayscale brightness GF42 and the third pattern grayscale brightness GF43 is equal to the background grayscale brightness GB, the fourth pattern grayscale brightness GF44, the fifth pattern grayscale brightness GF45 and the sixth pattern grayscale brightness GF46 are different, and the The average value of the fourth pattern grayscale brightness GF44, the fifth pattern grayscale brightness GF45 and the sixth pattern grayscale brightness GF46 is equal to the background grayscale brightness GB, the seventh pattern grayscale brightness GF47, the eighth pattern grayscale brightness GF48 and the ninth pattern grayscale brightness GF49 are different, and the average value of the seventh pattern grayscale brightness GF47, the eighth pattern grayscale brightness GF48 and the ninth pattern grayscale brightness GF49 is equal to the background grayscale brightness GB.

As shown in Figures 5A to 5C, the grayscale brightness of two pattern blocks F41 at two adjacent time points is different.

As shown in Figure 6A, the frame F of Figure 5A lasts for the first time interval △T1, the frame F of Figure 5B lasts for the second time interval △T2, and the frame F of Figure 5C lasts for the third time interval △T3. The first time interval △T1, the second time interval △T2, and the third time interval △T3 are, for example, 1/360 seconds, but may also be longer or shorter. The sum of the first time interval △T1, the second time interval △T2, and the third time interval △T3 is a cycle, such as 1/120 seconds.

The dotted line in FIG. 6A represents the grayscale brightness of the known screen, and the bold line in FIG. 6A represents the grayscale brightness of the screen displayed by the display device 100. Taking the same pattern block F41c as an example, compared with the grayscale brightness change of the known screen, the difference between the third pattern grayscale brightness GF43 in FIG. 5A, the sixth pattern grayscale brightness GF46 in FIG. 5B, and the ninth pattern grayscale brightness GF49 in FIG. 5C is smaller, so the flicker value is smaller.

As shown in Figure 6B, for the same pattern block, the average value of the grayscale brightness of Figures 5A to 5C is also equal to the background grayscale brightness GB. In this way, visually, the displayed grayscale of the pattern area at two points in time is roughly equal to the background grayscale brightness GB, making it difficult for the human eye to discern the grayscale changes of the pattern area at two points in time.

As shown in Figures 5A to 5C, the grayscale brightness of the first pattern GF41, the grayscale brightness of the fourth pattern GF44 and the grayscale brightness of the seventh pattern GF47 are different, the grayscale brightness of the second pattern GF42, the grayscale brightness of the fifth pattern GF45 and the grayscale brightness of the eighth pattern GF48 are different, and the grayscale brightness of the third pattern GF43, the grayscale brightness of the sixth pattern GF46 and the grayscale brightness of the ninth pattern GF49 are different.

As shown in Figures 5A to 5C, the first pattern grayscale brightness GF41, the fifth pattern grayscale brightness GF45 and the ninth pattern grayscale brightness GF49 are substantially equal, the second pattern grayscale brightness GF42, the sixth pattern grayscale brightness GF46 and the seventh pattern grayscale brightness GF47 are substantially equal, and the third pattern grayscale brightness GF43, the fourth pattern grayscale brightness GF44 and the eighth pattern grayscale brightness GF48 are substantially equal.

As shown in FIGS. 5A to 5C , the first region M4 complements the pattern region F4. The first region M4 has similar or identical features to the pattern region F4. For example, the first region M4 includes a plurality of first blocks M41. As shown in FIG. 5A , at a first time point, the first M41a, the second M41b and the third M41c of these first blocks M41 are respectively the first grayscale brightness G41, the second grayscale brightness G42 and the third grayscale brightness G43; as shown in FIG. 5B , at a second time point, the first M41a, the second M41b and the third M41c of these first blocks M41 are respectively the fourth grayscale brightness G44, the fifth grayscale brightness G45 and the sixth grayscale brightness G46; as shown in FIG. 5C , at a third time point, the first M41a, the second M41b and the third M41c of these first blocks M41 are respectively the seventh grayscale brightness G47, the eighth grayscale brightness G48 and the ninth grayscale brightness G49. In one embodiment, the first grayscale brightness G41, the second grayscale brightness G42 and the third grayscale brightness G43 are different, and the average value of the first grayscale brightness G41, the second grayscale brightness G42 and the third grayscale brightness G43 is equal to the background grayscale brightness GB, the fourth grayscale brightness G44, the fifth grayscale brightness G45 and the sixth grayscale brightness G46 are different, and the average value of the fourth grayscale brightness G44, the fifth grayscale brightness G45 and the sixth grayscale brightness G46 is equal to the background grayscale brightness GB, the seventh grayscale brightness G47, the eighth grayscale brightness G48 and the ninth grayscale brightness G49 are different, and the average value of the seventh grayscale brightness G47, the eighth grayscale brightness G48 and the ninth grayscale brightness G49 is equal to the background grayscale brightness GB.

As shown in Figures 5A to 5C, the first grayscale brightness G41, the fourth grayscale brightness G44 and the seventh grayscale brightness G47 are different, the second grayscale brightness G42, the fifth grayscale brightness G45 and the eighth grayscale brightness G48 are different, and the third grayscale brightness G43, the sixth grayscale brightness G46 and the ninth grayscale brightness G49 are different. In another embodiment, the first grayscale brightness G41, the fifth grayscale brightness G45 and the ninth grayscale brightness G49 are substantially equal, the second grayscale brightness G42, the sixth grayscale brightness G46 and the seventh grayscale brightness G47 are substantially equal, and the third grayscale brightness G43, the fourth grayscale brightness G44 and the eighth grayscale brightness G48 are substantially equal.

As shown in Figures 5A to 5C, along the horizontal direction, the grayscale brightness of any two adjacent first blocks is different. Similarly, along the vertical direction, the grayscale brightness of any two adjacent first blocks is different.

As shown in Table 1 below, the number of pixels contained in each first block M41 of Figure 5A. In Table 1, "O" indicates good shooting effect, "X" indicates poor shooting effect, and "△" indicates acceptable shooting effect. The number of pixels is represented by a matrix. The more pixels each first block M41 has, the better the shooting effect (the clearer the pattern area is captured), but the higher the flicker value. If the flicker value is equal to or less than 19, it is acceptable. The number of pixels for good shooting effect is 10×10 and 20×20.

In summary, the embodiment of the present invention provides a display device, which can display a picture, the picture includes at least one pattern area, at least one first area and at least one second area, wherein each pattern area is located between the corresponding first area and second area. In another embodiment, the picture can omit the second area. At least one of the pattern area, the first area and the second area can be a mosaic pattern area. The mosaic pattern area includes a plurality of blocks, wherein the two grayscale brightness of two adjacent blocks is different, and the average value of the two grayscale brightness of a block at two time points is substantially equal to the background grayscale brightness. In this way, visually, the display grayscale of the pattern area at two time points is substantially equal to the background grayscale brightness, making it difficult for human eyes to recognize the grayscale change of the pattern area at two time points. In addition, the mosaic pattern area can also reduce the human eye's recognition of the pattern area.

According to the Flicker test (e.g., Flicker@L128), the flicker value of the screen displayed by the display device of the embodiment of the present invention is 2.3, which is lower than the flicker value of 4.8 of the screen displayed by the conventional display device (without mosaic design and without internal and external grayscale difference), and also lower than the flicker value of 4.7 of the screen displayed by the conventional display device (without mosaic design). The lower the flicker value, the lower the recognition of the pattern area (flicker) by the human eye; conversely, the higher the recognition of the pattern area by the human eye, the more uncomfortable the human eye feels.

Since the mosaic pattern area increases the contrast (grayscale difference) with the surrounding area, the camera can capture a clearer appearance of the pattern area. In one embodiment, the two grayscale brightnesses of a block of the mosaic pattern area at two points in time are respectively a higher grayscale brightness and a lower grayscale brightness, wherein the higher grayscale brightness and the lower grayscale brightness are determined according to the background grayscale brightness. For example, by looking up a table, a curve or an equation, the higher grayscale brightness and the lower grayscale brightness corresponding to the background grayscale brightness are obtained.

In summary, although the present disclosure has been disclosed as above by the embodiments, it is not intended to limit the present disclosure. Those with ordinary knowledge in the technical field to which the present disclosure belongs can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the scope defined by the attached patent application.

F: Screen

F1: Pattern area

F11: Pattern block

G11: First gray level brightness

G12: Second gray level brightness

G15: Fifth gray level brightness

G16: Sixth gray level brightness

GF11: First pattern grayscale brightness

M1: Zone 1

M11: Block 1

M11a, N11a: The first

M11b, N11b: The second one

N1: Zone 2

N11: Second block

P1: Pixels

Claims (9)

A display device includes: a display panel for displaying a picture, the picture including a pattern area and a first area, the first area adjacent to the pattern area, the first area including a plurality of first blocks; and a controller for: at a first time point, controlling a first and a second adjacent to the first blocks to respectively display a first grayscale brightness and a second grayscale brightness that are different; and at a second time point, controlling the first and the second to respectively display a third grayscale brightness and a fourth grayscale brightness that are different; wherein the first A grayscale brightness is different from the third grayscale brightness, the average value of the first grayscale brightness and the third grayscale brightness is equal to a background grayscale brightness, and the average value of the second grayscale brightness and the fourth grayscale brightness is equal to the background grayscale brightness; wherein the pattern area includes a plurality of pattern blocks; the controller is further used to: at the first time point, control each of the pattern blocks to display a pattern grayscale brightness; at the second time point, control each of the pattern blocks to display another pattern grayscale brightness, wherein the pattern grayscale brightness is different from the other pattern grayscale brightness. A display device as described in claim 1, wherein the second grayscale brightness and the fourth grayscale brightness are substantially equal. A display device as described in claim 1, wherein the second grayscale brightness is different from the fourth grayscale brightness, and the average value of the second grayscale brightness and the fourth grayscale brightness is equal to the background grayscale brightness. The display device as described in claim 1, wherein the pattern area includes a plurality of pattern blocks; the controller is further used to: at the first time point, control a third party and a fourth party adjacent to the pattern blocks to respectively display a first pattern grayscale brightness and a second pattern grayscale brightness; at the second time point, the third party and the fourth party respectively display a third pattern grayscale brightness and a fourth pattern grayscale brightness. A display device as described in claim 4, wherein the average value of the grayscale brightness of the first pattern and the grayscale brightness of the second pattern is not equal to the grayscale brightness of the background, and the average value of the grayscale brightness of the third pattern and the grayscale brightness of the fourth pattern is not equal to the grayscale brightness of the background. A display device as described in claim 1, wherein the screen further includes a second area, the second area is adjacent to one of an outer edge and an inner edge of the pattern area, and the first area is adjacent to the other of the outer edge and the inner edge of the pattern area. A display device as described in claim 1, wherein the first area is a first mosaic pattern area, and the screen further includes a second mosaic pattern area, which is located between the first mosaic pattern area and the second mosaic pattern area. A display device as described in claim 1, wherein the first area is adjacent to at least a portion of the entire outer contour of the pattern area. A display device as described in claim 1, wherein the first block corresponds to one or some of the plurality of pixels of the display panel.