Tiled display device and driving method thereof

Abstract

A tiled display device is proposed. The tiled display device includes a signal source, a processor and a plurality of displays. The signal source provides a display signal. The processor receives the display signal, and includes a detecting element. The displays display the screen according to the display signal. The adjacent two displays are arranged in tiles. Each of the displays has a display region and a boundary region, and includes a driving circuit, a plurality of pixel units and a plurality of boundary pixel units. The pixel units are located at the display region. The boundary pixel units are located at the boundary region. The detecting element generates a detecting signal according to a display state of the displays, the processor determines whether to output a compensation controlling signal according to the detecting signal, and the driving circuit adjusts the brightness of each of the boundary pixel units according to the compensation controlling signal. Thus, the tiled display device of the present disclosure can decrease the discontinuous visual effect between the displays.

Description

[Technical Field]

[0001] This disclosure relates to a display device and its driving method, and more particularly to a splicing display device and its driving method. [Previous Technology]

[0002] With the development and popularization of display device manufacturing technology, splicing multiple displays can expand the application areas of displays. For example, large display screens are used in advertising billboards, and connecting displays via flexible circuit boards allows for folding, improving portability. However, regardless of whether the display is large or small, even if the display bezel width is reduced, there is still a seam between the two displays, and the dark area formed by the seam will cause the display image to be discontinuous. Therefore, in order to improve the display effect of splicing display devices, it is necessary to make corresponding modifications and adjustments to the displays through optical compensation. [Summary of the Invention]

[0003] Therefore, this disclosure provides a splicing display device, comprising a signal source, a processor, and a plurality of displays. The signal source provides a display signal. The processor is signal-connected to the signal source and receives the display signal; the processor includes a sensing element. The displays are signal-connected to the processor and display an image according to the display signal. Adjacent displays are arranged in a splicing manner. Each of the displays has a display area and a boundary area, and includes a driving circuit, a plurality of pixel units, and a plurality of boundary pixel units. The pixel units are signal-connected to the driving circuit and located in the display area, wherein the boundary area of ​​one of the displays is closer to the adjacent display than the display area. The boundary pixel units are signal-connected to the driving circuit and located in the boundary area. The sensing element generates a sensing signal according to a display state of the displays, the processor determines whether to output a compensation control signal according to the sensing signal, and the driving circuit adjusts the brightness of the boundary pixel units according to the compensation control signal.

[0004] According to one embodiment of the present disclosure, the boundary pixel units are divided into multiple blocks, each of the blocks containing B portions of the boundary pixel units, and satisfying the following formula: B = C × D; and C ≥ 2, and D ≥ 1. C and D represent the number of columns and the number of rows of each block, respectively. The driving circuit adjusts the brightness of one of the B portions of the boundary pixel units in each block according to the compensation control signal.

[0005] According to one embodiment of the present disclosure, the spacing between two adjacent displays is the same as the width of 2A other portion of these boundary pixel units, the brightness of B portions of these boundary pixel units in each of these blocks is C×(D+A) times the brightness of these pixel units, and the brightness of the remaining boundary pixel units in each of these blocks is zero.

[0006] According to one embodiment of the present disclosure, the boundary pixel units include a first row pixel unit and a second row pixel unit, the first row pixel unit has a first brightness, the second row pixel unit has a second brightness, the pixel units have a third brightness, and the first brightness and the second brightness are both greater than the third brightness.

[0007] According to one embodiment of the present disclosure, the two first row pixel units and the two second row pixel units of adjacent displays are symmetrically arranged.

[0008] This disclosure provides a driving method for a splicing display device, comprising driving a signal source to output a display signal to a processor; driving a sensing element of the processor to sense a display state of a plurality of displays of the splicing display device and generate a sensing signal; driving the processor to determine whether to output a compensation control signal based on the sensing signal; driving a plurality of driving circuits of the displays to adjust the brightness of a plurality of boundary pixel units located in a boundary area of ​​each of the displays according to the compensation control signal; and driving the boundary pixel units of the displays and a plurality of pixel units in a display area of ​​each of the displays to display an image according to the display signal.

[0009] According to one embodiment of the present disclosure, the boundary pixel units are divided into multiple blocks, each of the blocks containing B portions of the boundary pixel units, and satisfying the following formula: B = C × D; and C ≥ 2, and D ≥ 1. C and D represent the number of columns and the number of rows of each block, respectively. The driving circuit adjusts the brightness of one of the B portions of the boundary pixel units in each block according to the compensation control signal.

[0010] According to one embodiment of the present disclosure, the spacing between two adjacent displays is the same as the width of 2A other portion of these boundary pixel units, the brightness of B other portion of these boundary pixel units in each of these blocks is C×(D+A) times the brightness of these pixel units, and the brightness of the remaining boundary pixel units in each of these blocks is zero.

[0011] According to one embodiment of the present disclosure, the boundary pixel units include a first row pixel unit and a second row pixel unit, the first row pixel unit has a first brightness, the second row pixel unit has a second brightness, the pixel units have a third brightness, and the first brightness and the second brightness are both greater than the third brightness.

[0012] According to one embodiment of the present disclosure, the two first row pixel units and the two second row pixel units of adjacent displays are symmetrically arranged.

Implementation Method

[0013] The embodiments of components and configurations described below are merely examples and are not intended to be limiting. To simplify and clearly illustrate the technical features and effects of this disclosure, the dimensions (e.g., length, width, thickness, and depth) of elements (e.g., layers, films, substrates, and regions) in the drawings are enlarged proportionally, and the number of some elements is reduced. Therefore, the description and explanation of the embodiments below are not limited to the number of elements in the drawings or the size and shape of the elements, but should cover the dimensions, shapes, and deviations from both caused by actual manufacturing processes and / or tolerances. For example, a flat surface shown in the drawings may have rough and / or non-linear characteristics, and an acute angle shown in the drawings may be rounded. Therefore, the elements presented in the drawings of this application are primarily for illustration and are not intended to precisely depict the actual shape of the elements, nor are they intended to limit the scope of the claims in this application. Furthermore, the repetition of reference numerals and / or numbers in the various examples of this disclosure does not, in itself, limit the relationship between the various embodiments and / or components discussed.

[0014] Furthermore, in this document, when a component (or unit or module, etc.) is "connected" to another component, it can mean that the component is directly connected to the other component, or it can mean that the component is indirectly connected to the other component, that is, there is another component between the component and the other component. Only when it is explicitly stated that a component is "directly connected" to another component does it mean that there is no other component between the component and the other component. The terms "first," "second," "third," etc., are only used to describe different components and do not limit the components themselves. Therefore, the first component can also be referred to as the second component. Moreover, the combination of components / units / circuits in this document is not a combination that is generally known, conventional, or customary in this field. Whether the component / unit / circuit itself is customary cannot be used to determine whether its combination relationship is easily completed by someone with ordinary knowledge in the art.

[0015] Please refer to Figure 1, which is a schematic diagram of the splicing display device 100 according to an embodiment of the present disclosure. The splicing display device 100 includes a signal source 110, a processor 120, and a plurality of displays 130a and 130b. The signal source 110 provides a display signal Sig1. The processor 120 is signal-connected to the signal source 110 and receives the display signal Sig1. The processor 120 includes a sensing element 121. The displays 130a and 130b are signal-connected to the processor 120 and display an image according to the display signal Sig1. Adjacent displays 130a and 130b are arranged in a splicing manner. Each display 130a and 130b has a display area D1 and a boundary area D2, and includes a driving circuit 131, a plurality of pixel units 132, a flexible circuit board 133, and a plurality of boundary pixel units 134. These pixel units 132 are signal-connected to the drive circuit 131 and are located in the display area D1, wherein the boundary area D2 of the display 130a is closer to the adjacent display 130b than the display area D1. The boundary pixel unit 134 is signal-connected to the drive circuit 131 and is located in the boundary area D2.

[0016] In detail, the processor 120 may be a computer device with image processing capabilities, such as, but not limited to, a central processing unit (CPU), a graphics processing unit (GPU), or an image signal processor (ISP); the sensing element 121 may be an external sensor or may be disposed inside the displays 130a and 130b, for sensing whether the displays 130a and 130b are in an independent display state or a spliced ​​display state; the number of displays 130a and 130b is at least two, and they can be spliced ​​in any direction; the boundary area D2 of the display 130a may be located on the side where the display 130a is connected to the adjacent display 130b; the display area D1 of the display 130a is farther away from the adjacent display 130b than the boundary area D2; the driving circuit 131 is used to drive the pixel unit 132 and the boundary pixel unit 134 to emit light; in some embodiments, each pixel unit 132 and each boundary pixel unit 134 may be implemented by one or more light-emitting elements, but this disclosure is not limited thereto.

[0017] Please refer to Figures 1 and 2, wherein Figure 2 is a flowchart of the driving method 200 of the splicing display device 100 according to the present disclosure embodiment. The driving method 200 of the splicing display device 100 includes steps S1, S2, S3, S4, S5, S6, and S7. Step S1 includes driving the signal source 110 to output a display signal Sig1 to the processor 120. Step S2 includes driving the sensing element 121 of the processor 120 to sense the display status of the plurality of displays 130a and 130b of the splicing display device 100 and generate a sensing signal. Step S3 includes driving the processor 120 to determine whether to output a compensation control signal based on the sensing signal. Step S4 includes the processor 120 outputting a compensation control signal. Step S5 includes driving the driving circuit 131 of the displays 130a and 130b to adjust the brightness of the plurality of boundary pixel units 134 located in the boundary area D2 of each display 130a and 130b according to the compensation control signal. Step S6 includes outputting the display signal Sig1 to the displays 130a and 130b. Step S7 includes driving the boundary pixel units 134 of the displays 130a and 130b and the plurality of pixel units 132 of the display area D1 of each display 130a and 130b to display the image according to the display signal Sig1.

[0018] Specifically, step S1 is used to transmit the display signal Sig1 of the display screen to the processor 120. Step S2 is used by the sensing element 121 to sense whether the display state of the multiple displays 130a and 130b is an independent display state or a spliced ​​display state. The independent display state means that the displays 130a and 130b are not spliced, and there is no correlation between the images displayed by the two. The spliced ​​display state means that the displays 130a and 130b each display a different part of an image. In step S3, the processor 120 determines the display state detected by the sensing signal. When the display state is an independent display state, there is no need to perform brightness compensation on the boundary area D2 of the displays 130a and 130b, and step S6 is executed; when the display state is a spliced ​​display state, step S4 is executed. Step S4 is to transmit the compensation control signal from the processor 120 to the driving circuit 131 of the displays 130a and 130b through the flexible circuit board 133. Step S5 involves performing brightness compensation on the boundary pixel units 134 of displays 130a and 130b according to the compensation control signal. Step S6 involves outputting the display signal Sig1 to displays 130a and 130b that do not require splicing. Step S7 involves driving displays 130a and 130b to display the image according to the display signal Sig1 and the compensation control signal.

[0019] Each display 130a and 130b of the splicing display device 100 typically has a bezel. Therefore, when the displays 130a and 130b are spliced ​​together, there is a splicing gap between them. In order to reduce the visual discontinuity caused by the splicing gap, one of the technical features of the splicing display device 100 is to perform brightness compensation on the boundary pixel unit 134 located in the boundary area D2. By changing the brightness of the boundary area D2, the visual discontinuity of the dark area in the gap is blurred and faded. The technical details of the brightness compensation of the boundary pixel unit 134 by the driving method 200 of the splicing display device 100 will be described in more detail below through a more detailed embodiment.

[0020] Please refer to Figures 1, 3A, and 3B, wherein Figure 3A is a partial schematic diagram of the displays 130a and 130b of the splicing display device 100 of this disclosed embodiment; Figure 3B is a timing diagram of the splicing display device 100 driving the displays 130a and 130b corresponding to Figure 3A. Figure 3A sequentially illustrates, from left to right, the pixel units 132 of a portion of the display area D1 of the display 130a, the boundary pixel units 134 of the boundary area D2 of the display 130a, the gap area D3 between the displays 130a and 130b, the boundary pixel units 134 of the boundary area D2 of the display 130b, and the brightness corresponding to the pixel units 132 of the display area D1 of the display 130b. In Figure 3A, the numbers "1", "0", and "9" in pixel unit 132 and boundary pixel unit 134 only indicate the brightness ratio between adjacent pixel units (i.e., pixel unit 132 and boundary pixel unit 134), and do not represent the actual brightness values ​​of the aforementioned pixel units. The spacing between adjacent units of displays 130a and 130b (i.e., the gap area D3) is the same as the width of 2A boundary pixel units 134. These boundary pixel units 134 are divided into multiple blocks, each block containing B boundary pixel units 134, and satisfying the following formulas (1) and (2): B=C×D (1); and C≥2, and D≥1 (2).

[0021] Wherein, C and D represent the number of columns and rows of each block, respectively. In Figure 3A, the boundary pixel units 134 of the (n-1)th and nth rows of display 130a are located in boundary area D2, and the boundary pixel units 134 of the 1st and 2nd rows of display 130b are located in boundary area D2. The driving circuit 131 adjusts the brightness of the boundary pixel units 134 located in boundary area D2 via a compensation control signal.

[0022] Taking Figure 3A as an example, the spacing between displays 130a and 130b is equal to the width of two boundary pixel units 134, that is, A equals 1. Each block contains 6 boundary pixel units 134 and consists of 3 columns and 2 rows of boundary pixel units 134, that is, B equals 6; C equals 3; D equals 2. In other embodiments disclosed herein, A may be a non-integer, and the number of columns, rows and quantities of boundary pixel units 134 in each block may be adjusted as needed under the condition of satisfying the above formulas (1) and (2), and is not limited thereto. In this way, the boundary area D2 is divided into multiple blocks, and the brightness compensation is performed on the boundary pixel units 134 adjacent to the gap area D3 between the two adjacent displays 130a and 130b, so that each block maintains the same average brightness, and the visual brightness of the boundary area D2 is reduced, so as to soften the connection between the two displays 130a and 130b.

[0023] Furthermore, the driving circuit 131 adjusts the brightness of one of the B boundary pixel units 134 in each block according to the compensation control signal. The brightness of this one of the B boundary pixel units 134 in each block is C×(D+A) times the brightness of pixel unit 132, while the brightness of the remaining boundary pixel units 134 in each block is zero. In Figure 3A, the driving circuit 131 adjusts the brightness of the 2nd and 5th boundary pixel units 134 in the nth row of display 130a and the 2nd and 5th boundary pixel units 134 in the 1st row of display 130b. In other embodiments disclosed herein, the brightness can also be adjusted from other boundary pixel units 134 in each block, and is not limited thereto.

[0024] The 3B figure drawing processor 120 sends the compensation control signal to the drive circuit 131. The boundary pixel unit 134 is compensated by the scanning signal, light emission control signal, compensation control signal and timing diagram of each row boundary pixel unit 134 output by the drive circuit 131 of the display 130a, 130b before and after compensation.

[0025] In the driving method 200 of the splicing display device 100 of the present invention, when the splicing display device 100 is selected to compensate the boundary pixel units 134 of the displays 130a and 130b according to Figure 3A, the compensation brightness of each boundary pixel unit 134 and the brightness of the pixel unit 132 can be converted into grayscale values ​​through a lookup table according to the proportional relationship between the compensation brightness of each boundary pixel unit 134 and the brightness of the pixel unit 132 in the aforementioned compensation method, and the brightness compensation ratio can be calculated according to the grayscale values.

[0026] Taking Figure 3A as an example, the brightness ratio between pixel unit 132 and the compensated boundary pixel unit 134 is 1:9. When the maximum brightness of the boundary pixel unit 134 is set to the brightest (100%), the brightness of pixel unit 132 can be estimated to be 11.11%. According to the corresponding table of brightness and grayscale of displays 130a and 130b, when the brightness of 11.11% corresponds to grayscale 94, the proportion of grayscale 94 to the maximum value of grayscale (grayscale 255) is 36.8%. Therefore, the brightness compensation ratio of Figure 3A is 36.8%. In other embodiments disclosed herein, the grayscale value corresponding to the brightness of the pixel unit may vary according to the actual specifications of the display and is not limited thereto.

[0027] Please refer to Figure 1, Figure 4A and Figure 4B, wherein Figure 4A is a partial schematic diagram of the displays 130a and 130b of the splicing display device 100 of the present disclosure embodiment; Figure 4B is a timing diagram of the splicing display device 100 driving the displays 130a and 130b corresponding to Figure 4A. Figure 4A illustrates another compensation method of the splicing display device 100, and sequentially shows from left to right the pixel units 132 of a portion of the display area D1 of the display 130a, the boundary pixel units 134 of the boundary area D2 of the display 130a, the gap area D3 between the displays 130a and 130b, the boundary pixel units 134 of the boundary area D2 of the display 130b, and the brightness corresponding to the pixel units 132 of the display area D1 of the display 130b. In Figure 3A, the numbers "1", "0", "0.5", "4", and "9" in pixel unit 132 and boundary pixel unit 134 only indicate the brightness ratio between adjacent pixel units (i.e., pixel unit 132 and boundary pixel unit 134) and do not represent the actual brightness values ​​of the aforementioned pixel units.

[0028] In Figure 4A, the boundary pixel units 134 in rows n-4, n-3, n-2, n-1, and n of display 130a are located in boundary area D2, and the boundary pixel units 134 in rows 1 to 5 of display 130b are located in boundary area D2. The brightness compensation method for the boundary pixel units 134 in rows n-1 and n of display 130a and rows 1 to 2 of display 130b is the same as that in Figure 3A, and will not be repeated. In particular, the brightness of the boundary pixel units 134 in rows n-4, n-3, and n-2 of display 130a and rows 3 to 5 of display 130b, the brightness of the second and fifth boundary pixel units 134 in row n-3 of display 130a and row 4 of display 130b is 4 times the brightness of pixel unit 132, and the brightness of the remaining boundary pixel units 134 is 0.5 times the brightness of pixel unit 132.

[0029] The fourth series drawing processor 120 sends the compensation control signal to the drive circuit 131. The boundary pixel unit 134 is compensated by the scanning signal, light emission control signal, compensation control signal and timing diagram of each row boundary pixel unit 134 output by the drive circuit 131 of the display 130a, 130b before and after compensation.

[0030] Please refer to Figure 1, Figure 5A and Figure 5B, wherein Figure 5A is a partial schematic diagram of the displays 130a and 130b of the splicing display device 100 of the present disclosure embodiment; Figure 5B is a timing diagram of the splicing display device 100 driving the displays 130a and 130b corresponding to Figure 5A. Figure 5A illustrates another compensation method of the splicing display device 100, and sequentially shows from left to right the pixel units 132 of a portion of the display area D1 of the display 130a, the boundary pixel units 134 of the boundary area D2 of the display 130a, the gap area D3 between the displays 130a and 130b, the boundary pixel units 134 of the boundary area D2 of the display 130b, and the brightness corresponding to the pixel units 132 of the display area D1 of the display 130b. In Figure 3A, the numbers "1", "0", "1.3", and "1.7" in pixel unit 132 and boundary pixel unit 134 only indicate the brightness ratio between adjacent pixel units (i.e., pixel unit 132 and boundary pixel unit 134) and do not represent the actual brightness values ​​of the aforementioned pixel units.

[0031] The boundary pixel unit 134 includes a first row of pixel units and a second row of pixel units. The first row of pixel units has a first brightness, the second row of pixel units has a second brightness, and these pixel units 132 have a third brightness. The first brightness and the second brightness are both greater than the third brightness.

[0032] In Figure 5A, the first row of pixel units can be the (n-1)th row of pixel units of display 130a and the second row of pixel units of display 130b, and the second row of pixel units can be the nth row of pixel units of display 130a and the first row of pixel units of display 130b. The first brightness is 1.3 times the third brightness, and the second brightness is 1.7 times the third brightness. The two first row of pixel units and the two second row of pixel units of displays 130a and 130b can be symmetrically arranged, but this disclosure is not limited thereto. Thus, brightness compensation is performed on the boundary pixel units 134 located in the boundary area D2 to gradually fade the seam at the splicing point of displays 130a and 130b with a gradual visual effect. In other embodiments of this disclosure, the first brightness can be the same as the second brightness, but this disclosure is not limited thereto.

[0033] The 5B figure drawing processor 120 sends the compensation control signal to the drive circuit 131. The boundary pixel unit 134 is compensated by the scanning signal, light emission control signal, compensation control signal and timing diagram of each column of boundary pixel unit 134 output by the drive circuit 131 of the display 130a, 130b before and after compensation.

[0034] Please refer to Figure 1, Figure 6A and Figure 6B, wherein Figure 6A is a partial schematic diagram of the displays 130a and 130b of the splicing display device 100 of the present disclosure embodiment; Figure 6B is a timing diagram of the splicing display device 100 driving the displays 130a and 130b corresponding to Figure 6A. Figure 6A illustrates another compensation method of the splicing display device 100, and sequentially shows from left to right the pixel units 132 of a portion of the display area D1 of the display 130a, the boundary pixel units 134 of the boundary area D2 of the display 130a, the gap area D3 between the display 130a and the display 130b, the boundary pixel units 134 of the boundary area D2 of the display 130b, and the brightness corresponding to the pixel units 132 of the display area D1 of the display 130b. In Figure 6A, the numbers "1", "1.3", "1.7", "0", and "9" in pixel unit 132 and boundary pixel unit 134 only indicate the brightness ratio between adjacent pixel units (i.e., pixel unit 132 and boundary pixel unit 134) and do not represent the actual brightness values ​​of the aforementioned pixel units.

[0035] In Figure 6A, the boundary pixel units 134 of columns n-4, n-3, n-2, n-1, and n in display 130a are located in boundary area D2, and the boundary pixel units 134 of columns 1 to 5 in display 130b are located in boundary area D2. The compensation method in Figure 6A is combined with the compensation methods in Figures 3A and 5A, and will not be described again.

[0036] The sixth series drawing processor 120 sends the compensation control signal to the drive circuit 131. The boundary pixel unit 134 is compensated by the scanning signal, light emission control signal, compensation control signal and timing diagram of each column of boundary pixel unit 134 output by the drive circuit 131 of the display 130a, 130b before and after compensation.

[0037] Please refer to Figures 1 to 7, where Figure 7 is a schematic diagram of the image displayed by the splicing display device 100 according to some embodiments of this disclosure. Figure 7 is a schematic diagram of the splicing seam when different brightness compensation methods are used to compensate for the splicing gap between two adjacent displays 130a and 130b when the gap is 300~600um (micrometers). From left to right, it includes no compensation for boundary pixel units (no compensation), 2 columns of gradient compensation for the boundary area, 3 columns of gradient compensation for the boundary area, 4 columns of gradient compensation for the boundary area, 3×3 point compensation, 3×3+3×3 gradient point compensation, 3×3+2×2 gradient point compensation, and 2×2+2×2 gradient point compensation. Among them, 2 columns of gradient compensation for the boundary area, 3 columns of gradient compensation for the boundary area, and 4 columns of gradient compensation for the boundary area correspond to the number of columns of boundary pixel units 134 adjusted for compensation according to the compensation method in Figure 5A. 3×3 point compensation corresponds to the compensation method in Figure 3A. The gradient point compensation methods 3×3+3×3, 3×3+2×2, and 2×2+2×2 correspond to the compensation methods in Figure 4A, and the number of rows and columns of each block are adjusted accordingly.

[0038] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims. [Simplified Explanation of the Diagram]

[0039] To make the above and other objects, features, advantages and embodiments of this disclosure more readily understood, the accompanying drawings are described as follows: Figure 1 is a schematic diagram of a splicing display device according to an embodiment of this disclosure; Figure 2 is a flowchart of a driving method for a splicing display device according to an embodiment of this disclosure; Figure 3A is a partial schematic diagram of the display of a splicing display device according to an embodiment of this disclosure; Figure 3B is a timing diagram of driving the display of the splicing display device corresponding to Figure 3A; Figure 4A is a partial schematic diagram of the display of a splicing display device according to an embodiment of this disclosure; Figure 4B is a timing diagram of driving the display of the splicing display device corresponding to Figure 4A; Figure 5A is a partial schematic diagram of the display of a splicing display device according to an embodiment of this disclosure; Figure 5B is a timing diagram of driving the display of the splicing display device corresponding to Figure 5A; Figure 6A is a partial schematic diagram of the display of a splicing display device according to an embodiment of this disclosure; Figure 6B is a timing diagram of driving the display of the splicing display device corresponding to Figure 6A; and Figure 7 is a schematic diagram of an image screen presented by a splicing display device according to a partial embodiment of this disclosure.

Claims

1. A splicing display device, comprising: a signal source providing a display signal; a processor signal-connected to the signal source and receiving the display signal, the processor comprising: a sensing element; and a plurality of displays signal-connected to the processor and displaying an image according to the display signal, the displays being arranged in a splicing manner adjacent to each other, wherein each of the displays has a display area and a boundary area, and comprising: a driving circuit; a plurality of pixel units signal-connected to the driving circuit and located in the display area, wherein the boundary area of ​​one of the displays is closer to the other of the adjacent displays than the display area; and a plurality of boundary pixel units signal-connected to the driving circuit and located in the boundary area; wherein... The sensing element generates a sensing signal based on a display state of the displays, the processor determines whether to output a compensation control signal based on the sensing signal, and the driving circuit adjusts the brightness of the boundary pixel units according to the compensation control signal.

2. The splicing display device as described in claim 1, wherein the boundary pixel units are divided into multiple blocks, each of the blocks comprising B portions of the boundary pixel units, and satisfying the following formula: B = C × D; and C ≥ 2, and D ≥ 1; where, C and D represent the number of columns and rows of each of the blocks, respectively. The driving circuit adjusts the brightness of one of the boundary pixel units in the B parts of each of the blocks according to the compensation control signal.

3. The splicing display device as claimed in claim 2, wherein the spacing between adjacent displays is the same as the width of 2A other portion of the boundary pixel units, the brightness of the boundary pixel units of B portions of each block is C×(D+A) times the brightness of the pixel units, and the brightness of the remaining boundary pixel units of each block is zero.

4. The splicing display device as described in claim 1, wherein the boundary pixel units include a first row pixel unit and a second row pixel unit, the first row pixel unit has a first brightness, the second row pixel unit has a second brightness, the pixel units have a third brightness, and the first brightness and the second brightness are both greater than the third brightness.

5. The splicing display device as described in claim 4, wherein the two first row pixel units and the two second row pixel units of adjacent displays are symmetrically arranged.

6. A driving method for a video wall display device, comprising: driving a signal source to output a display signal to a processor; driving a sensing element of the processor to sense a display state of a plurality of displays of the video wall display device and generate a sensing signal; driving the processor to determine whether to output a compensation control signal based on the sensing signal; driving a plurality of driving circuits of the displays to adjust the brightness of a plurality of boundary pixel units located in a boundary area of ​​each of the displays based on the compensation control signal; and driving the boundary pixel units of the displays and a plurality of pixel units in a display area of ​​each of the displays to display an image based on the display signal.

7. The driving method of the splicing display device as described in claim 6, wherein the boundary pixel units are divided into multiple blocks, each of the blocks comprising B portions of the boundary pixel units, and satisfying the following formula: B = C × D; and C ≥ 2, and D ≥ 1; where, C and D represent the number of columns and rows of each of the blocks, respectively. The driving circuit adjusts the brightness of one of the boundary pixel units in the B parts of each of the blocks according to the compensation control signal.

8. The driving method of the splicing display device as described in claim 7, wherein the spacing between adjacent displays is the same as the width of 2A other portion of the boundary pixel units, the brightness of the boundary pixel units of B portions of each block is C×(D+A) times the brightness of the pixel units, and the brightness of the remaining boundary pixel units of each block is zero.

9. The driving method of the splicing display device as described in claim 6, wherein the boundary pixel units include a first row pixel unit and a second row pixel unit, the first row pixel unit has a first brightness, the second row pixel unit has a second brightness, the pixel units have a third brightness, and the first brightness and the second brightness are both greater than the third brightness.

10. The driving method of the splicing display device as described in claim 9, wherein the two first row pixel units and the two second row pixel units of adjacent displays are symmetrically arranged.

Images