Display device, controller and system

Abstract

The display device is a daisy-chained display device in a display chain constituting at least a part of a tiled display, and includes: a display unit that displays an image corresponding to the display device in the display chain based on an image signal of a chain image supplied to and displayed by the display chain; a first interface unit for acquiring, from one end side of the display chain, a first image signal including an image signal of a part of the chain image; and a second interface unit for acquiring a second image signal from the other end side of the display chain, the second image signal including an image signal of the remaining part of the chain image, and a display processing unit for causing the display unit to display its corresponding image based on the first image signal and / or the second image signal.

Description

Technical Field

[0001] The present disclosure relates to a display device, a controller, and a system. Background Art

[0002] For example, as known in Patent Document 1, in a tiled display, a plurality of display devices each including a display are daisy-chained. When a controller supplies a video signal to the display chain, the video signal is input to the display device, and video based on the video signal is displayed.

[0003] Citation List

[0004] Patent Document

[0005] Patent Document 1: JP 2017-207580 A Summary of the Invention

[0006] Technical Problem

[0007] When a failure such as disconnection occurs in the display chain, the video signal does not reach the display device in the stage after the disconnection. Patent Document 1 proposes a method in which the controller switches the transmission direction of the video signal when a failure notification is received from the display device. The video display may be interrupted due to the time required for the switching of the controller or the like.

[0008] Aspects of the present invention suppress interruption of video display.

[0009] Solution to the Problem

[0010] A display device according to an aspect of the present disclosure is daisy-chained in a display chain configuring at least a part of a tiled display, and the display device includes: a display unit that displays video corresponding to the own display device in the display chain based on a video signal of a chain video supplied to and displayed by the display chain; a first interface unit that acquires a first video signal including a video signal of a part of the chain video from one end side of the display chain; a second interface unit that acquires a second video signal including the remaining part of the chain video from the other end side of the display chain; and a display processing unit that causes the display unit to display corresponding video based on at least one of the first video signal and the second video signal.

[0011] A controller according to one aspect of the present disclosure provides a video signal to a display chain including a plurality of daisy-chained display devices and configures at least a part of a tiled display. The controller includes: a first interface unit connected to one end of the display chain and configured to provide a first video signal, the first video signal including a video signal of a part of a chain video to be displayed by the display chain; and a second interface unit connected to the other end of the display chain and configured to provide a second video signal including a video signal of the remaining part of the chain video.

[0012] A system according to one aspect of the present disclosure includes a first controller and a second controller that provide video signals to a display chain including a plurality of daisy-chained display devices and configure at least a part of a tiled display. The first controller includes a first interface unit connected to one end of the display chain and configured to provide a first video signal, the first video signal including a video signal of a part of a chain video to be displayed by the display chain, and the second controller includes a second interface unit connected to the other end of the display chain and configured to provide a second video signal to the other end of the display chain, the second video signal including a video signal of the remaining part of the chain video. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a diagram showing an example of a schematic configuration of a system according to an embodiment.

[0014] Figure 2 is a diagram showing an example of a schematic configuration of a system according to an embodiment.

[0015] Figure 3 is a diagram showing an example of a schematic configuration of a display device.

[0016] Figure 4 is a diagram showing an example of a displayed video.

[0017] Figure 5 is a diagram showing an example of a schematic configuration of a system.

[0018] Figure 6 is a diagram showing an example of a displayed video.

[0019] Figure 7 is a diagram showing an example of a displayed video.

[0020] Figure 8 is a diagram showing an example of a displayed video.

[0021] Figure 9 is a diagram showing an example of a schematic configuration of a display device.

[0022] Figure 10 This is a diagram showing an example of a schematic configuration of a display device.

[0023] Figure 11 This is a diagram showing an example of a change in a video signal.

[0024] Figure 12 This is a diagram showing an example of a change in a video signal.

[0025] Figure 13 This is a diagram showing an example of a change in a video signal. Detailed Description of Embodiments

[0026] Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In addition, in the embodiments described below, the same reference numerals are assigned to the same elements, and redundant descriptions are omitted.

[0027] The present disclosure will be explained in the order of the items described below.

[0028] 0. Introduction

[0029] 1. Embodiments

[0030] 2. Variations

[0031] 3. Examples of Effects

[0032] 0. Introduction

[0033] A tiled display includes a plurality of display devices, each corresponding to a tiled portion. The display devices display video based on a video signal provided from a controller. In order to provide a video signal from one controller to a large number of display devices, a configuration in which a plurality of display devices are connected in a chained manner (cascaded connection) is generally used. This configuration is also referred to as a display chain. For example, the controller provides a video signal to one end of the display chain. When a failure such as an open circuit occurs in the display chain, the video signal does not reach the display device at the stage after the open circuit, and the corresponding display device cannot display the video.

[0034] Patent Document 1 discloses a method in which a controller that has received a failure notification from a display device provides a video signal to the other end of the display chain to switch the transmission direction of the video signal. However, in the method of Patent Document 1, since the controller receives a failure notification from the display device and changes the transmission direction of the video signal, there is a high possibility of a delay from the failure to the display recovery and an interruption of the video display. In the case of two-way communication in which transmission and reception are separated, twice the bandwidth of one-way communication is required to handle the change in the transmission direction.

[0035] For example, at least some of the above problems are solved by the disclosed technology. As will be explained in detail below, for example, half of the video signal is supplied (forward supply) to one end of the display chain, and the remainder is supplied (reverse supply) to the other end of the display chain. The display device displays a video based on these two video signals without malfunction, and in the event of a malfunction, displays a video based on only one video signal by supplementing the video based on one video signal with the other video signal. Since no intervention by the controller is required, disconnection of video display can be suppressed. Even in a unidirectional video signal transmission path, redundancy can be achieved without increasing the bandwidth. There is a higher possibility of cost reduction compared to the case of using a bidirectional transmission path.

[0036] 1. Embodiment

[0037] Figure 1 and Figure 2 FIG. 9 is a diagram showing an example of a schematic configuration of a system according to an embodiment. The system 100 is a system configured to display video (e.g., a display system) and includes a controller 1 and a tiled display 2. The controller 1 and the tiled display 2 are configured to communicate with each other such that at least data can be transmitted from the controller 1 to the tiled display 2. An example of the data is a video signal, and for example, a video transmission cable is used for transmission. An example of the video transmission cable is a LAN cable or the like. For example, a full-duplex communication system such as 10GBASE-T Ethernet (registered trademark) can be used.

[0038] The controller 1 controls the tiled display 2. An example of the control is to control video display through the tiled display 2, and more specifically, includes providing (transmitting) a video signal from the controller 1 to the tiled display 2. The controller 1 includes, for example, a processor, a storage device, etc. not shown in the figure, and is designed to implement the functions of the controller 1 described below. This design can be a software design or can be a hardware design.

[0039] The tiled display 2 includes a plurality of display devices 3 arranged in a tiled shape. One display device 3 includes a display unit corresponding to one tile block in the tiled display 2 and peripheral elements (such as components and parts) related to the display. Such a display device 3 is also referred to as a chassis or the like. The plurality of display devices 3 can cooperate with each other to display one video as a whole.

[0040] As Figure 2 shown, the tiled display 2 includes at least one display chain 30. In Figure 2In the example shown, the tiled display 2 includes a plurality of display chains 30, and two of the plurality of display chains 30 are added with marks similar to the display chain 30-1 and the display chain 30-2. When not particularly distinguished, the display chains 30-1 and 30-2 are simply referred to as the display chain 30. This also applies to other elements distinguished by symbols.

[0041] The display chain 30 includes a plurality of display devices 3 in a daisy chain. In other words, the display devices 3 are in a daisy chain and used in the display chain 30. When the tiled display 2 includes only one display chain 30, the number of display devices 3 included in the tiled display 2 is the same as the number of display devices 3 included in the display chain 30. The daisy chain connection is also referred to as a cascade connection or the like.

[0042] One end of the display chain 30 is referred to and shown as one end 30a. The other end of the display chain 30 is referred to and shown as the other end 30b. Within a non-contradictory range, one end 30a of the display chain 30 can be understood as indicating the display device 3 located closest to the one end 30a side in the display chain 30. The other end 30b of the display chain 30 can be understood as indicating the display device 3 located closest to the other end 30b in the display chain 30.

[0043] The controller 1 supplies the video signal to be displayed by the display chain 30 to the display chain 30. The video signal supplied to the display chain 30 is referred to and shown as the video signal VS in the drawings. The video displayed by the display chain 30 based on the video signal VS is also called the "chain video".

[0044] The video signals VS supplied to the display chain 30-1 and the display chain 30-2 are referred to and shown as the video signal VS-1 and the video signal VS-2, so that the video signals VS can be distinguished.

[0045] The video signal VS includes the video signal VS1 and the video signal VS2. The video signal VS1 is the first video signal of the video signal including a part (e.g., half) of the chain video of the display chain 30. The video signal VS2 is the second video signal of the video signal including the remaining part (e.g., the remaining half) of the chain video of the display chain 30.

[0046] In one embodiment, the video signal VS1 may include the video signal of one of the odd rows and the even rows of the chain video. The video signal VS2 may include the video signal of the other row. For example, the row direction corresponds to the lateral direction (horizontal direction) of the display device 3. In the following description, unless otherwise specified, the video signal VS1 includes the video signal of the odd rows, and the video signal VS2 includes the video signal of the even rows.

[0047] The controller 1 supplies the video signal VS1 to one end 30a of the display chain 30. The video signal VS1 is input to the display device 3 closest to the one end 30a, and is transmitted to the display device 3 via the display device 3 at the subsequent stage (the other end 30b side). The input and transmission are repeated, and the video signal VS1 is input to the display devices 3 daisy-chained between the one end 30a and the other end 30b of the display chain 30.

[0048] The controller 1 supplies the video signal VS2 to the other end 30b of the display chain 30. The video signal VS2 is input to the display device 3 closest to the other end 30b, and is transmitted to the display device 3 via the display device 3 at the subsequent stage (the one end 30a side). The input and transmission are repeated, and the video signal VS2 is input to the display devices 3 daisy-chained between the other end 30b and the one end 30a of the display chain 30.

[0049] The controller 1 includes an interface unit 11( Figure 2 ). The interface unit 11 may include a port in the controller 1 connected to the video transmission cable. When the video transmission cable is a LAN cable, the port is a LAN port, and the interface unit 11 provides an interface conforming to, for example, the RJ45 standard.

[0050] The interface unit 11 includes an interface unit 11-1 and an interface unit 11-2. The interface unit 11-1 is connected to one end 30a of the display chain 30 (via the video transmission cable) and is used to supply the video signal VS1. The interface unit 11-2 is connected to the other end 30b of the display chain 30 (via the video transmission cable) and is used to supply the video signal VS2. In addition, as will be described in detail below, the display device 3 also has an interface unit connected to the video transmission cable. In Figure 2 the interface unit is marked and shown as the interface unit IF.

[0051] The display chain 30 displays the display chain video based on the video signal VS supplied from the controller 1. Specifically, the display device 3 in the display chain 30 displays the video corresponding to its own display device (position) in the display chain 30 based on the video signal VS supplied to the display chain 30. Also refer to Figure 3 for the description.

[0052] Figure 3This is a diagram showing an example of the schematic configuration of a display device. The display device 3 has an interface unit IF, an input processing unit 4, a buffer 5, a display processing unit 6, and a display unit 7. The input processing unit 4, the buffer 5, and parts of the display processing unit 6 in the display device 3 include, for example, a processor, a storage device, etc. not shown in the figure, and are designed to implement various functions explained below. This design can be a software design or a hardware design. As described above, the video signal VS, more specifically the video signal VS1 and the video signal VS2, are input to the display device 3.

[0053] The interface unit IF is used to acquire the video signal VS input to the display device 3. The interface unit IF includes a port to which the transmission cable of the video signal VS in the display device 3 is connected. When the video transmission cable is a LAN cable, this port is a LAN port, and the interface unit IF provides an interface conforming to the RJ45 standard, for example.

[0054] The interface unit IF includes an interface unit IF-1 and an interface unit IF-2. The interface unit IF-1 is used to acquire the video signal VS1 from one end 30a side of the display chain 30( Figure 1 )). The interface unit IF-2 is used to acquire the video signal VS2 from the other end 30b side of the display chain 30.

[0055] For example, when the video transmission cable supports unidirectional transmission, the display device 3 is connected to the front and rear display devices 3 through two video transmission cables. The interface unit IF of the display device 3 is configured such that a total of 4 video transmission cables are connected to the interface unit IF. When the video transmission cable supports bidirectional transmission, the display device 3 is connected to the front and rear display devices 3 through one video transmission cable. The interface unit IF of the display device 3 is configured such that a total of two video transmission cables are connected to the interface unit IF.

[0056] The input processing unit 4 processes the video signal VS acquired by the interface unit IF. The input processing unit 4 includes an input processing unit 4-1 and an input processing unit 4-2. The input processing unit 4-1 processes the video signal VS1. The input processing unit 4-2 processes the video signal VS2. Note that the acquisition of the video signal VS by the interface unit IF and the input of the video signal VS to the display device 3 are understood to have the same meaning within a non-contradictory range, and acquisition and input can be appropriately replaced.

[0057] The input processing unit 4 includes a detection unit 41. The detection unit 41 detects an abnormality in the video signal VS. The detection unit 41 of the input processing unit 4-1 is referred to and shown as the detection unit 41-1. The detection unit 41 of the input processing unit 4-2 is referred to and shown as the detection unit 41-2. The detection unit 41-1 detects an abnormality in the video signal VS1 (for example, no input). The detection unit 41-2 detects an abnormality in the video signal VS2 (for example, no input).

[0058] The method for detecting an abnormality by the detection unit 41 is not particularly limited. Various known methods capable of detecting an abnormality in a normal video signal can be used. For example, when there is no input of the video signal VS1, the detection unit 41-1 can determine that the video signal VS1 has an abnormality and detect the abnormality of the video signal VS1. When the signal strength of the video signal VS1 is quite low (for example, lower than a predetermined threshold), the detection unit 41-1 can determine that the video signal VS1 has an abnormality and detect the abnormality of the video signal VS1. Similarly, the detection unit 41-2 can also detect an abnormality in the video signal VS2 when the video signal VS2 is not input. When the signal strength of the video signal VS2 is quite low, the detection unit 41-2 can detect the abnormality of the video signal VS2.

[0059] Note that the above abnormalities of the video signal VS1 and the video signal VS2 can be caused by a failure in the display chain 30. Examples of the failure are disconnection and the like. In the display device 3 closer to the other end 30b side of the display chain 30 than the abnormality occurrence part (fault part) ( Figure 2 ), an abnormality in the video signal VS1 is detected. In the display device 3 closer to the one end 30a side of the display chain 30 than the abnormality occurrence part, an abnormality in the video signal VS2 is detected.

[0060] The detection results of the detection unit 41-1 and the detection results of the detection unit 41-2 are sent (notified) to the display unit 7.

[0061] It should be noted that the video signals VS1 and VS2 input to the display device 3 are not only processed by the input processing unit 4-1 and the input processing unit 4-2, but also transmitted to the display device 3 in a later stage. The display device 3 may also include a functional block (for example, an output processing unit) having such a transmission function.

[0062] The buffer 5 temporarily stores (holds) the video signal VS acquired by the interface unit IF. The buffer 5 includes a buffer 5-1 and a buffer 5-2. The buffer 5-1 stores the video signal VS1. The buffer 5-2 stores the video signal VS2. The video signal VS is read from the buffer 5 according to the video display timing.

[0063] The display processing unit 6 and the display unit 7 are explained together. The display processing unit 6 performs display processing based on the processing result of the input processing unit 4 (more specifically, the detection result of the detection unit 41) and the video signal VS acquired by the interface unit IF (more specifically, the video signal VS stored in the buffer 5). The display unit 7 displays a video corresponding to its own display device (position) in the display chain 30 according to the display processing of the display processing unit 6. Unless otherwise specifically stated, the operations of the display unit 7 described below can be understood to be performed under the display processing of the display processing unit 6.

[0064] As described above, the display unit 7 is a display equivalent to one tile block in the tiled display 2. An example of the display unit 7 is an LED (light-emitting diode) display. Not only LEDs can be used, but also various known displays can be used.

[0065] The display of the display unit 7 is controlled by the display processing unit 6. The display processing unit 6 causes the display unit 7 to display a video corresponding to its own display device based on at least one of the video signal VS1 and the video signal VS2. Also refer to Figure 4 for the description.

[0066] Figure 4 is a diagram showing an example of a display video. When neither the video signal VS1 nor the video signal VS2 is abnormal, the display processing unit 6 causes the display unit 7 to display a video based on both the video signal VS1 and the video signal VS2. In this example, the video based on the video signal VS1 is displayed in odd-numbered rows, and the video based on the video signal VS2 is displayed in even-numbered rows.

[0067] When an abnormality exists in one of the video signal VS1 and the video signal VS2, the display processing unit 6 does not use the video signal with the abnormality in that one, and causes the display unit 7 to display a video based on the video signal without abnormality in the other. That is, the display processing unit 6 causes the pixels in the display unit 7 that should display the video of the abnormal one of the video signal VS1 and the video signal VS2 to display the video of the other video signal without abnormality.

[0068] Specifically, when the video signal VS1 generates an abnormality, the display processing unit 6 causes the display unit 7 to display the video based on the video signal VS2. In this example, the video based on the video signal VS2 is displayed on both odd-numbered rows and even-numbered rows. For example, the pixel values of corresponding (adjacent) pixels in two rows are set to be the same. The same video based on the same video signal VS2 is displayed on two adjacent odd-numbered and even-numbered lines.

[0069] When the video signal VS2 is abnormal, the display processing unit 6 causes the display unit 7 to display a video based on the video signal VS1. In this example, the video based on the video signal VS1 is displayed on both odd-numbered lines and even-numbered lines. For example, the pixel values of corresponding (adjacent) pixels in two lines are set to be the same. The same video based on the same video signal VS1 is displayed on two lines of an odd-numbered line and an even-numbered line adjacent to each other.

[0070] In the system 100 described above, the video signal VS1 is supplied to one end 30a of the display chain 30 and the video signal VS2 is supplied to the other end 30b of the display chain 30. The display device 3 displays a video based on the video signal of the other party without abnormality in the case where one of the video signal VS1 and the video signal VS2 is abnormal. For example, since the intervention of the controller in Patent Document 1 is not required, interruption of video display can be suppressed. Even in a one-way video signal transmission path, redundancy can be achieved without increasing the bandwidth. Compared with the case of using a two-way transmission path, the possibility of cost reduction is higher.

[0071] As described above, a full-duplex communication scheme (such as 10GBASE-T Ethernet) can be used for video transmission. Even in this case, compared with the transmission direction of the same video (simple backup) in Patent Document 1, there is an advantage that the bandwidth can be bisected (or a video with a double bit rate can be transmitted) by transmitting the bisected video (split video signal) from both sides. Even when a video signal is transmitted by full-duplex communication, in the method of the prior art, only one direction is used and the effective bandwidth is doubled because two directions are used in this scheme. Since both the one-way transmission scheme and the full-duplex communication scheme can ensure a double effective bandwidth compared with the technology of Patent Document 1, there are the following advantages: for example, a video can be transmitted to a larger number of display devices 3 and a higher-quality image can be transmitted.

[0072] 2. Modification Example

[0073] The disclosed technology is not limited to the above-described embodiments. Some modifications are explained.

[0074] <First Modification Example>

[0075] In one embodiment, the system 100 may include a plurality of controllers. By making the controllers redundant, interruption of video display can be suppressed even when a failure occurs in a part of the controllers. This is described with reference to Figure 5 for explanation.

[0076] Figure 5 is a diagram showing an example of a schematic configuration of a system. In this example, the system 100 includes a controller 1-1 and a controller 1-2.

[0077] In controllers 1-1 and 1-2, controller 1-1 includes interface unit 11-1. Controller 1-1 is the first controller that provides video signal VS1 to one end 30a of display chain 30. In controllers 1-1 and 1-2, controller 1-2 includes interface unit 11-2. Controller 1-2 is the second controller that provides video signal VS2 to the other end 30b of display chain 30.

[0078] Since the operation of display device 3 in display chain 30 is as described above, the explanation of this operation is omitted. Even if controller 1-1 malfunctions and video signal VS1 is no longer supplied to display chain 30, display device 3 displays video based on video signal VS2. Conversely, even if controller 1-2 malfunctions and video signal VS2 is no longer provided to display chain 30, display device 3 displays video based on video signal VS1. Therefore, even if one of controllers 1-1 and 1-2 fails, video display can be prevented from being interrupted.

[0079] Redundantize the output frequency band (signal frequency band) of the controllers, that is, each of controllers 1-1 and 1-2 is half of the output frequency band of the controller before redundancy, and the number of display devices 3 that can be connected is doubled. If the number of controllers before redundancy is two or more, redundancy can be achieved without increasing the number of controllers.

[0080] <Second Modified Example>

[0081] In the above embodiment, an example is given in which video signal VS is divided into a video signal of odd rows and a video signal of even rows, one being video signal VS1 and the other being video signal VS2. However, other video signals VS can be divided.

[0082] For example, video signal VS1 can include the video signal of one of the odd columns and even columns of the chained video. Video signal VS2 can include the video signal of the other column. The column direction corresponds to, for example, the longitudinal direction (vertical direction) of display device 3. Similarly refer to Figure 6 for description.

[0083] Figure 6 is a diagram showing an example of the displayed video. In this example, video signal VS1 includes the video signal of odd columns, and video signal VS2 includes the video signal of even columns. When neither video signal VS1 nor video signal VS2 is abnormal, the video based on video signal VS1 is displayed in odd columns, and the video based on video signal VS2 is displayed in even columns. When an abnormality occurs in video signal VS1, the video based on video signal VS2 is displayed in both odd and even columns. When video signal VS2 is abnormal, the video based on video signal VS1 is displayed in both odd and even columns.

[0084] Alternatively, the video signal VS1 may include the video signal of one of the odd frames and the even frames of the chained video. The video signal VS2 may include the video signal of the other frame. The odd frame and the even frame correspond to the video (image) of one frame alternately displayed on the time axis. Similarly refer to Figure 7 for description.

[0085] Figure 7 is a diagram showing an example of displaying a video. In this example, the video signal VS1 includes the video signal of the odd frame, and the video signal VS2 includes the video signal of the even frame. When neither the video signal VS1 nor the video signal VS2 is abnormal, the video based on the video signal VS1 is displayed in the odd frame, and the video based on the video signal VS2 is displayed in the even frame. When an abnormality occurs in the video signal VS1, the video based on the video signal VS2 is displayed in both the odd frame and the even frame. When the video signal VS2 is abnormal, the video based on the video signal VS1 is displayed in both the odd frame and the even frame.

[0086] For example, the video signal VS1 may include the video signal of one of the first pixel and the second pixel alternately located in each of the row direction and the column direction of the display unit 7. The video signal VS2 may include the video signal of the other pixel of the first pixel and the second pixel alternately located in each of the row direction and the column direction of the display unit 7. It can also be said that the first pixel and the second pixel are positioned in a checkerboard pattern. For example, the first pixel displays a video in a checkerboard pattern, and the second pixel displays a video in an inverted checkerboard pattern. Similarly refer to Figure 8 for description.

[0087] Figure 8 is a diagram showing an example of displaying a video. In this example, the video signal VS1 includes the video signal of the first pixel, and the video signal VS2 includes the video signal of the second pixel. When neither the video signal VS1 nor the video signal VS2 is abnormal, the video based on the video signal VS1 is displayed in the first pixel, and the video based on the video signal VS2 is displayed in the second pixel. When an abnormality occurs in the video signal VS1, the video based on the video signal VS2 is displayed in both the first pixel and the second pixel. When an abnormality exists in the video signal VS2, the video based on the video signal VS1 is displayed in both the first pixel and the second pixel.

[0088] For example, when using the above video signal VS1 and video signal VS2, it is also possible to suppress the interruption of video display. The possibility of flexible design adjusted according to the system configuration of the system 100 and the like increases.

[0089] <Third Variant Example>

[0090] In one embodiment, the display processing unit 6 may also supplement (pixel complementation) the pixels in the pixels of the display unit 7 that should display video based on one video signal in which an abnormality exists in the video signal VS1 and the video signal VS2 with the pixel values of the other video signal without an abnormality. As an example, a case where the video signal VS1 includes a video signal of odd rows and the video signal VS2 includes a video signal of even rows will be described.

[0091] In the case where an abnormality occurs in the video signal VS1, the pixel values of the pixels that should display the video signal VS1 (pixels of odd rows) are supplemented with the pixel values of the pixels that should display the video based on the video signal VS2 (pixels of even rows). For example, the pixel value of an odd row is set to the average value of the pixel values of the even rows on both sides of the odd row. In addition, in the case where there are pixels of even rows only on one side of the odd row, the pixel value of the odd row may also be set to, for example, the same value as the pixel value of the even row.

[0092] In the case where an abnormality occurs in the video signal VS2, the pixel values of the pixels that should display the video signal VS2 (pixels of even rows) are supplemented with the pixel values of the pixels that should display the video based on the video signal VS1 (pixels of odd rows). For example, the pixel value of an even row is set to the average value of the pixel values of the odd rows on both sides of the even row. In addition, in the case where there are pixels of odd rows only on one side of the even row, the pixel value of the even row may also be set to, for example, the same value as the pixel value of the odd row.

[0093] When the video signal VS1 includes a video signal of even rows and the video signal VS2 includes a video signal of odd rows, the same description as above can be made. This also applies to the case where the video signal VS1 includes a video signal of one of odd columns and even columns and the video signal VS2 includes a video signal of the other column. This also applies to the case where the video signal VS1 includes a video signal of one of odd frames and even frames and the video signal VS2 includes a video signal of the other frame. When the video signal VS1 includes a video signal of one pixel of the first pixel and the second pixel (in a checkerboard pattern) and the video signal VS2 includes a video signal of the other pixel, this also applies. In this case, pixel complementation can be performed using the pixel values on both sides in the row direction and the column direction. More specifically, the pixel values on both sides in the direction (tilt direction) between the row direction and the column direction can also be used for pixel complementation. Thus, the effect of pixel complementation can be further enhanced.

[0094] By performing pixel complementation, for example, compared with the case of using the pixel values of other pixels as they are without performing pixel complementation, the quality (image quality) of the video can be further improved.

[0095] <Fourth Modification Example>

[0096] In one embodiment, the video signal VS provided by the controller 1 to the display chain 30 may include an error detection code. The detection unit 41 of the input processing unit 4 can perform abnormality detection of the video signal VS using the error detection code included in the video signal VS. Refer to Figure 9 An explanation thereof will be given.

[0097] Figure 9 FIG. is a diagram showing an example of a schematic configuration of a display device. Each of the video signal VS1 and the video signal VS2 provided to the display device 3 includes an error detection code. The error detection code included in the video signal VS1 is referred to as an error detection code EC1. The error detection code included in the video signal VS2 is referred to as an error detection code EC2.

[0098] The detection unit 41 of the input processing unit 4 of the display device 3 includes an error detection circuit 411. The error detection circuit 411 of the detection unit 41-1 is referred to and shown as an error detection circuit 411-1. The error detection circuit 411 of the input processing unit 4-2 is referred to and shown as an error detection circuit 411-2.

[0099] The error detection circuit 411-1 detects an abnormality of the video signal VS1 based on the error detection code EC1 included in the video signal VS1. For example, when a large number of code errors that cannot withstand code correction are found, it is determined that the video signal VS1 has an abnormality. The abnormality of the video signal VS1 is detected.

[0100] The error detection circuit 411-2 detects an abnormality of the video signal VS2 based on the error detection code EC2 included in the video signal VS2. For example, when a large number of code errors that cannot withstand code correction are found, it is determined that the video signal VS2 has an abnormality. The abnormality of the video signal VS2 is detected.

[0101] For example, the above error detection circuit 411-1 and error detection circuit 411-2 can be used to detect abnormalities of the video signal VS1 and the video signal VS2. In addition, when no other abnormality detection unit is prepared outside the display device 3 (such as a video transmission cable, etc.), as described above, it is also possible to detect abnormalities of the video signal VS1 and the video signal VS2, and it is possible to suppress interruption of video display.

[0102] <Fifth Modification Example>

[0103] In one embodiment, information regarding the presence or absence of an abnormality in each of the video signal VS1 and the video signal VS2 (e.g., the abnormality detection result of the video signal VS described below) can be notified to the controller 1 from at least one of the plurality of display devices 3 included in the display chain 30. The controller 1 can receive the notification from the display device 3, specify the abnormality occurrence portion in the display chain 30 based on the received notification, and change the video signal VS1 and the video signal VS2 based on the specified result. Refer to Figures 10 to 13 This will be described.

[0104] Figure 10 is a diagram showing an example of the schematic configuration of a display device. The input processing unit 4 of the display device 3 includes a notification unit 42. The notification unit 42 of the input processing unit 4-1 is referred to and shown as the notification unit 42-1. The notification unit 42 of the input processing unit 4-2 is referred to and shown as the notification unit 42-2.

[0105] The notification unit 42-1 notifies the controller 1 of the detection result of the detection unit 41-1, more specifically, the presence or absence of an abnormality in the video signal VS1. The notification unit 42-2 notifies the controller 1 of the detection result of the detection unit 41-2, more specifically, the presence or absence of an abnormality in the video signal VS2.

[0106] For the notification from the notification unit 42 to the controller 1, for example, a transmission path (video transmission cable) for the video signal VS can be used. In this case, for example, in the display device 3, a signal representing the detection result of the detection unit 41 can be superimposed on the video signal VS and transmitted to the display device 3 at the last stage, and can be transmitted from the display device 3 at the last stage to the controller 1. A communication line provided separately from the video transmission cable (e.g., a communication line having a lower speed than the video transmission cable) can be used to notify the controller 1 through the notification unit 42.

[0107] The controller 1 specifies the abnormality occurrence portion in the display chain 30 based on the notification from the notification unit 42 of the display device 3. In addition, in the following description, the abnormality occurrence unit is set as a cut-off portion.

[0108] Figures 11 to 13 is a diagram showing an example of the change in the video signal. Six display devices 3 configuring the display chain 30 are shown. The display devices 3 are referred to and shown as display devices 3-1 to 3-6 so as to be distinguishable. The display devices 3-1 to 3-6 are connected in a daisy chain in sequence between one end 30a and the other end 30b of the display chain 30.

[0109] As Figure 11As shown, first, the video signal VS1 includes the video signals of the odd lines of the chained video, that is, the video signals of the odd lines of the video displayed by each of the display devices 3-1 to 3-6. The video signal VS2 includes the video signals of the even lines of the chained video, that is, the video signals of the even lines of the video displayed by each of the display devices 3-1 to 3-6.

[0110] As shown by the white arrow, in this example, a disconnection occurred between the display device 3-4 and the display device 3-5. Only the video signal VS1 (the video signal of the odd lines) among the video signals VS1 and VS2 is input to the display devices 3-1 to 3-4. Only the video signal VS2 (the video signal of the even lines) among the video signals VS1 and VS2 is input to the display devices 3-5 and 3-6. The display devices 3-1 to 3-4 display the video based on the video signal VS1. The display devices 3-5 and 3-6 display the video based on the video signal VS2.

[0111] Each of the display devices 3-1 to 3-6 notifies the controller 1 of the abnormality of the video signals VS1 and VS2. The controller 1 designates the abnormality occurrence part based on the notifications from each of the display devices 3-1 to 3-6. For example, the display devices 3-1 to 3-4 notify the controller 1 that there is an abnormality in the video signal VS2. The display devices 3-5 and 3-6 notify the controller 1 that there is an abnormality in the video signal VS1. From these notifications, it can be known that there is an abnormality in sending the video signal VS1 from the display device 3-4 to the display device 3-5, and there is an abnormality in sending the video signal VS2 from the display device 3-5 to the display device 3-4. Thus, the controller 1 designates the part between the display device 3-4 and the display device 3-5 as the abnormality occurrence part.

[0112] When at least one display device 3 is set closer to one end 30a side of the display chain 30 than the abnormality occurrence part, the controller 1 provides a video signal from the interface unit 11-1 for at least a part of the display device 3 that is set closer to one end 30a side of the display chain 30 than the abnormality occurrence part, and the video signal is included in the video signals VS1 and VS2. When at least one display device 3 is set closer to the other end 30b side of the display chain 30 than the abnormality occurrence part, the controller 1 provides a video signal from the interface unit 11-2 for at least a part of the display device 3 that is set closer to the other end 30b side of the display chain 30 than the abnormality occurrence part, and the video signal is included in the video signals VS1 and VS2.

[0113] Specifically, for example, the controller 1 changes and provides the video signal VS1 and the video signal VS2 based on the abnormality occurrence portion specified according to the notification from the notification unit 42 of the display device 3. The controller 1 changes the video signal VS1 and the video signal VS2 such that the video signals of at least some of the display devices 3 located closer to one end 30a side of the display chain 30 than the disconnection portion in the video signal VS2 are not included in the video signal VS2 but are included in the video signal VS1. The controller 1 changes the video signal VS1 and the video signal VS2 such that the video signals of at least a part of the display devices 3 located closer to the other end 30b side of the display chain 30 than the disconnection portion in the video signal VS1 are not included in the video signal VS1 but are included in the video signal VS2. The display device 3 acquires, in one of the interface units IF-1 and IF-2, the video signal corresponding to its own display device included in the video signal VS1 and the video signal VS2 before the change. The display processing unit 6 of the display device 3 causes the display unit 7 to display a video corresponding to the video signal according to the video signal corresponding to its own display device.

[0114] In Figure 12 In the illustrated example, the video signal VS1 and the video signal VS2 are changed such that the video signals of the display devices 3-3 and 3-4 in the video signal VS2, that is, the video signals of the even rows of the display devices 3-3 and 3-4 are not included in the video signal VS2 but are included in the video signal VS1. The display devices 3-3 and 3-4 are arranged closer to one end 30a side of the display chain 30 than the abnormality occurrence portion in the display chain 30. Therefore, in the display devices 3-3 and 3-4, the interface unit IF-1 of the interface units IF-1 and IF-2 acquires the video signal corresponding to its own display device included in the video signal VS1 and the video signal VS2 before the change. The video signal VS1 and the video signal VS2 are changed such that the video signals of the display devices 3-5 and 3-6 in the video signal VS1, that is, the video signals of the odd rows of the display devices 3-5 and 3-6 are not included in the video signal VS1 but are included in the video signal VS2. The display devices 3-5 and 3-6 are arranged closer to the other end 30b side of the display chain 30 than the abnormality occurrence portion in the display chain 30. Therefore, in the display devices 3-5 and 3-6, the interface unit IF-2 of the interface units IF-1 and IF-2 acquires the video signal corresponding to its own display device included in the video signal VS1 and the video signal VS2 before the change.

[0115] As described above, in Figure 12In the illustrated example, the video signal VS1 is changed to include the video signals of the odd-numbered lines of display devices 3-1 to 3-4 and the video signals of the even-numbered lines of display devices 3-3 and 3-4. The video signal VS2 is changed to include the video signals of the even-numbered lines of display devices 3-5 and 3-6 and the video signals of the odd-numbered lines of display devices 3-5 and 3-6. The video signals of the odd-numbered lines and the even-numbered lines are input to display devices 3-3 to 3-6. Display devices 3-3 to 3-6 return to display (normal display) when there is no abnormality in both the video signal VS1 and the video signal VS2. Therefore, the quality (image quality) of the displayed video is improved.

[0116] Figure 13 An example of a timing chart is shown. Since the specific content of each process is as described above, detailed descriptions are appropriately omitted.

[0117] Time t0 represents the state before the disconnection occurs. The video signal VS1 provided by the controller 1 to the display chain 30 includes the video signals of the odd-numbered lines of display devices 3-1 to 3-6. The video signal VS2 includes the video signals of the even-numbered lines of display devices 3-1 to 3-6. Each of display devices 3-1 to 3-6 displays a video (normal display) based on the video signal VS1 and the video signal VS2.

[0118] At time t1, a disconnection occurs between display device 3-4 and display device 3-5. Only the video signal VS1 (the video signal of the odd-numbered lines) among the video signal VS1 and the video signal VS2 is input to display devices 3-1 to 3-4. In this example, display devices 3-1 to 3-4 use the video signal of the odd-numbered lines to supplement the video of the even-numbered lines and display the video. Only the video signal VS2 (the video signal of the even-numbered lines) among the video signal VS1 and the video signal VS2 is input to display devices 3-5 and 3-6. In this example, display devices 3-5 and 3-6 use the video signal of the odd-numbered lines to supplement the video of the even-numbered lines and display the video.

[0119] From time t2 to time t7, an abnormality is notified from the display device 3 to the control device 1. Display devices 3-1 to 3-4 notify the controller 1 of the abnormality of the video signal VS2. Display devices 3-5 and 3-6 notify the controller 1 of the abnormality of the video signal VS1.

[0120] At time t8 and time t9, the controller 1 changes the video signal VS1 and the video signal VS2 based on the notification from the display device 3. In this example, at time t8, the video signal VS1 is changed to include the video signals of the odd-numbered lines of the display devices 3-1 to 3-4 and the video signals of the even-numbered lines of the display devices 3-3 and 3-4. The display devices 3-3 and 3-4 display a video (normal display) based on the video signals of the odd-numbered lines and the video signals of the even-numbered lines. At time t9, the video signal VS2 is changed to include the video signals of the even-numbered lines of the display devices 3-5 and 3-6 and the video signals of the odd-numbered lines of the display devices 3-5 and 3-6. The display devices 3-5 and 3-6 display a video (normal display) based on the video signals of the odd-numbered lines and the video signals of the even-numbered lines.

[0121] For example, when a disconnection occurs as described above, the quality of the displayed video of at least a part of the display device 3 can be improved by changing the video signal VS1 and the video signal VS2 according to the disconnected part.

[0122] 3. Examples of effects

[0123] For example, as explained below, the techniques explained above are specified. One of the disclosed techniques is the display device 3. As illustrated with reference to Figures 1 to 4 etc., the display device 3 is in daisy chain in the display chain 30 that configures at least a part of the tiled display 2. The display device 3 includes a display unit 7 that displays, based on a video signal VS of a chain video provided to and displayed by the display chain 30, a video corresponding to the position of its own display device in the display chain 30, an interface unit IF-1 (first interface unit) for acquiring a video signal VS1 (first video signal) including a part of the video signal of the chain video from one end 30a side of the display chain 30, an interface unit IF-2 (second interface unit) for acquiring a video signal VS2 (second video signal) including the remaining part of the video signal of the chain video from the other end 30b side of the display chain 30, and a display processing unit 6 that causes the display unit 7 to display a video corresponding to the video signal according to at least one of the video signal VS1 and the video signal VS2. For example, even when there is no abnormality in both the video signal VS1 and the video signal VS2, the display processing unit 6 may cause the display unit 7 to display a video based on both the video signal VS1 and the video signal VS2, and when there is an abnormality in one of the video signal VS1 and the video signal VS2, the display processing unit 6 may cause the display unit 7 to display a video based on the video signal of the other party without abnormality. Therefore, interruption of video display can be suppressed.

[0124] For example, as illustrated with reference to Figures 1 to 4As described in [references], the display processing unit 6 can cause the pixels in the display unit 7 that should display a video based on one video signal (one of the video signals VS1 and VS2) with an abnormality to display a video based on the other video signal (the other of the video signals VS1 and VS2) without an abnormality. Alternatively, the display processing unit 6 can also add the pixels in the display unit 7 that should display a video based on an abnormality of one video signal (one of the video signals VS1 and VS2) to the pixel values that do not display an abnormality of the other video signal (the other of the video signals VS1 and VS2). For example, as described above, even when there is an abnormality in one of the video signals VS1 and VS2, a video can be displayed based on the other video signal without an abnormality.

[0125] As referenced Figure 4 and Figures 6 to 8 etc., the video signal VS1 can include a video signal of one of the odd and even rows of the chained video, and the video signal VS2 can include a video signal of the other rows. The video signal VS1 can include a video signal of one of the odd and even columns of the chained video, and the video signal VS2 can include a video signal of the other column. The video signal VS1 can include a video signal of one of the odd and even frames of the chained video, and the video signal VS2 can include a video signal of the other frame. The video signal VS1 can include a video signal of the chained video corresponding to one of the first pixel and the second pixel that are alternately located in the row direction and the column direction of the display unit 7 of the display device 3 connected in the display chain 30, and the video signal VS2 can include a video signal of the chained video corresponding to the other of the first pixel and the second pixel. For example, such various video signals VS1 and VS2 can be used.

[0126] As referenced Figure 9 etc., the display device 3 can include an error detection circuit 411 (error detection circuits 411-1 and 411-2) that detects the presence or absence of an abnormality in each of the video signals VS1 and VS2 based on error detection codes (error detection code EC1 and error detection code EC2) included in each of the video signals VS1 and VS2. For example, as described above, the abnormalities in the video signals VS1 and VS2 can be detected.

[0127] As referenced Figures 10 to 13As described above, the controller 1 may include a notification unit 42 (notification units 42-1 and 42-2), and the notification unit 42 supplies a video signal VS to the display chain 30 of the controller 1 to notify the presence or absence of an abnormality in each of the video signals VS1 and VS2. The display device 3 can acquire, in one of the interface units IF-1 and IF-2, the video signal corresponding to its own display device included in the video signals VS1 and VS2, and provide the video signal based on the notification from the notification unit 42. The display processing unit 6 can cause the display unit 7 to display a video corresponding to the video signal based on the video signal corresponding to its own display device. When its own display device is set to be closer to one end 30a side of the display chain 30 than the abnormality-occurring portion in the display chain 30, the interface unit IF-1 can acquire the video signal corresponding to its own display device included in the video signals VS1 and VS2. When its own display device is set to be closer to the other end 30b side of the display chain 30 than the abnormality-occurring portion in the display chain 30, the interface unit IF-2 can acquire the video signal corresponding to its own display device included in the video signals VS1 and VS2. For example, by performing such notification and using the video signal provided based on the notification, the quality of the displayed video of at least a part of the display device 3 can be improved.

[0128] Reference Figures 1 to 4 The controller 1 described above is also one of the disclosed technologies. The controller 1 supplies a video signal VS to a display chain 30 including a plurality of daisy-chained display devices 3 and configured to tile at least a part of the display 2. The controller 1 includes an interface unit 11-1 (first interface unit) and an interface unit 11-2 (second interface unit). The interface unit 11-1 is connected to one end 30a of the display chain 30 and is configured to provide a video signal VS1 (first video signal) including a part of the chain video displayed by the display chain 30, and the interface unit 11-2 is connected to the other end 30b of the display chain 30 and is configured to provide a video signal VS2 (second video signal) including the remaining part of the chain video. For example, the controller 1 can supply the video signal VS1 to one end 30a of the display chain 30 and supply the video signal VS2 to the other end 30b of the display chain 30. As described above, such a controller 1 can also suppress interruption of video display.

[0129] As reference Figures 10 to 13As described above, the controller 1 can receive from at least one of the display devices 3 included in the display chain 30 a notification of the presence or absence of an abnormality in each of the video signal VS1 and the video signal VS2. Based on this notification, the controller 1 can provide, from at least one of the interface unit 11-1 and the interface unit 11-2, a video signal corresponding to at least one display device 3 included in at least one of the video signal VS1 and the video signal VS2. Based on this notification, the controller 1 can specify an abnormality occurrence portion in the display chain 30, and when at least one display device 3 is arranged closer to one end 30a side of the display chain 30 than the abnormality occurrence portion, provide a video signal from the interface unit 11-1 to at least a part of the display device 3, the display device 3 being arranged closer to one end 30a side of the display chain 30 than the abnormality occurrence portion, the video signal being included in the video signal VS1 and the video signal VS2, and when at least one display device 3 is arranged closer to the other end 30b side of the display chain 30 than the abnormality occurrence portion, provide a video signal from the interface unit 11-2 to at least a part of the display device 3 arranged closer to the other end 30b side of the display chain 30 than the abnormality occurrence portion, the video signal being included in the video signal VS1 and the video signal VS2. For example, by receiving such a notification, determining an abnormality occurrence unit based on this notification, and providing a video signal, the quality of the displayed video of at least a part of the display device 3 can be improved.

[0130] Reference Figures 1 to 4 The system 100 described above, etc., is also one of the disclosed technologies. The system 100 includes a controller 1-1 (first controller) and a controller 1-2 (second controller), which supply video signals to a display chain 30 including a plurality of display devices 3 in a daisy chain and configure at least a part of the tiled display 2. The controller 1-1 includes an interface unit 11-1 (first interface unit), and the interface unit 11-1 is connected to one end 30a of the display chain 30 and is used to provide a video signal VS1 (first video signal) including a part of the chain video displayed through the display chain 30. The controller 1-2 (second controller) includes an interface unit 11-2 (second interface unit), and the interface unit 11-2 is connected to the other end 30b of the display chain 30 and is used to provide a video signal VS2 (second video signal) including the remaining part of the chain video to the other end 30b of the display chain 30. As described above, such a system 100 can also suppress interruption of video display. By making the controllers redundant with the controller 1-1 and the controller 1-2, even when one of the controllers fails, interruption of video display can be suppressed.

[0131] It should be noted that the effects described in this disclosure are only exemplary and are not limited by the disclosed content. There may be other effects.

[0132] Although the embodiments of the present disclosure have been described above, the technical scope of the present disclosure is not limited to the embodiments described above per se. Various changes are possible without departing from the gist of the present disclosure. Components in different embodiments and modifications can be appropriately combined.

[0133] It should be noted that the present technology can also adopt the following configurations.

[0134] (1) A display device in a display chain for configuring at least a part of a tiled display, the display device including:

[0135] a display unit that displays a video corresponding to its own display device in the display chain based on a video signal of a chain video provided to and displayed by the display chain;

[0136] a first interface unit that acquires a first video signal from one end side of the display chain, the first video signal including a video signal of a part of the chain video;

[0137] a second interface unit that acquires a second video signal including a video signal of the remaining part of the chain video from the other end side of the display chain; and

[0138] a display processing unit that causes the display unit to display a corresponding video based on at least one of the first video signal and the second video signal.

[0139] (2) The display device according to (1), wherein

[0140] the display processing unit

[0141] when neither the first video signal nor the second video signal has an abnormality, causes the display unit to display a video based on both the first video signal and the second video signal, and

[0142] in the case where one of the first video signal and the second video signal has an abnormality, causes the display unit to display a video based on the other video signal without an abnormality.

[0143] (3) The display device according to (2), wherein

[0144] the display processing unit causes pixels in the display unit that should display a video based on one abnormal video signal to display a video based on the other non-abnormal video signal.

[0145] (4) The display device according to (2), wherein

[0146] the display processing unit supplements pixels in the display unit that should display a video based on the one abnormal video signal with pixel values of the other video signal without an abnormality.

[0147] (5) The display device according to any one of (1) to (4), wherein,

[0148] The first video signal includes a video signal of one of the odd and even lines of the chained video, and

[0149] The second video signal includes a video signal of the other of the odd and even lines of the chained video.

[0150] (6) The display device according to any one of (1) to (4), wherein,

[0151] The first video signal includes a video signal of one of the odd and even columns of the chained video, and

[0152] The second video signal includes a video signal of the other of the odd and even columns of the chained video.

[0153] (7) The display device according to any one of (1) to (4), wherein,

[0154] The first video signal includes a video signal of one of the odd and even frames of the chained video, and

[0155] The second video signal includes a video signal of the other of the odd and even frames of the chained video.

[0156] (8) The display device according to any one of (1) to (4), wherein,

[0157] The first video signal includes a video signal corresponding to one of the first pixel and the second pixel of the chained video, the first pixel and the second pixel being alternately located in each of the row direction and the column direction of the display unit of the display devices connected in the display chain; and

[0158] The second video signal includes a video signal of the chained video corresponding to the other pixel of the first pixel and the second pixel.

[0159] (9) The display device according to any one of (1) to (8), further comprising:

[0160] A detection circuit that detects whether there is an abnormality in each of the first video signal and the second video signal based on error detection codes included in each of the first video signal and the second video signal.

[0161] (10) The display device according to any one of (1) to (9), further comprising:

[0162] A notification unit that notifies a controller that provides video signals to the display chain whether there is an abnormality in each of the first video signal and the second video signal.

[0163] (11) The display device according to (10), wherein,

[0164] One of the first interface unit and the second interface unit acquires a video signal corresponding to its own display device included in the first video signal and the second video signal, provides the video signal based on the notification from the notification unit, and

[0165] The display processing unit causes the display unit to display the corresponding video based on the video signal corresponding to the own display device.

[0166] (12) The display device according to (11), wherein,

[0167] When its own display device is arranged closer to one end side of the display chain than the abnormal occurrence part in the display chain, the first interface unit acquires a video signal corresponding to its own display device included in the first video signal and the second video signal, and

[0168] When its own display device is arranged closer to the other end side of the display chain than the abnormal occurrence part in the display chain, the second interface unit acquires a video signal corresponding to its own display device included in the first video signal and the second video signal.

[0169] (13) A controller that provides a video signal to a display chain including a plurality of daisy-chained display devices and configures at least a part of a tiled display, the controller including:

[0170] A first interface unit, connected to one end of the display chain and for providing a first video signal, the first video signal including a video signal of a part of the chain video to be displayed by the display chain; and

[0171] A second interface unit, connected to the other end of the display chain and for providing a second video signal including the remaining part of the chain video.

[0172] (14) The controller according to (13), wherein,

[0173] The first video signal is provided to one end of the display chain, and the second video signal is provided to the other end of the display chain.

[0174] (15) The controller according to (13) or (14), wherein,

[0175] The first video signal includes a video signal of one of the odd rows and the even rows of the chain video, and

[0176] The second video signal includes a video signal of the other of the odd rows and the even rows of the chain video.

[0177] (16) The controller according to (13) or (14), wherein,

[0178] The first video signal includes a video signal of one of the odd-numbered columns and the even-numbered columns of the chained video, and

[0179] The second video signal includes a video signal of the other of the odd-numbered columns and the even-numbered columns of the chained video.

[0180] (17) The controller according to (13) or (14), wherein,

[0181] The first video signal includes a video signal of one of the odd-numbered frames and the even-numbered frames of the chained video, and

[0182] The second video signal includes a video signal of the other of the odd-numbered frames and the even-numbered frames of the chained video.

[0183] (18) The controller according to (13) or (14), wherein,

[0184] The first video signal includes the video signal of the chained video, the video signal of the chained video corresponding to one of the first pixel and the second pixel, the first pixel and the second pixel alternately located in each of the row direction and the column direction of the display unit of the display devices connected in the display chain; and

[0185] The second video signal includes the video signal of the chained video corresponding to the other of the first pixel and the second pixel.

[0186] (19) The controller according to any one of (13) to (18), wherein,

[0187] Receive a notification related to whether there is an abnormality in each of the first video signal and the second video signal from at least one of the display devices included in the display chain.

[0188] (20) The controller according to (19), wherein

[0189] Based on the notification, provide a video signal corresponding to at least one of the display devices included in at least one of the first video signal and the second video signal from the first interface unit and the second interface unit.

[0190] (21) The controller according to (19) or (20), wherein,

[0191] Based on the notification, specify the portion where an abnormality occurs in the display chain,

[0192] When at least one display device is arranged closer to one end side of the display chain than the abnormal occurrence portion, a video signal for at least a part of the display device arranged closer to one end side of the display chain than the abnormal occurrence portion is provided from the first interface unit, the video signal being included in the first video signal and the second video signal, and

[0193] When at least one display device is arranged closer to the other end side of the display chain than the abnormal occurrence portion, a video signal for at least a part of the display device arranged closer to the other end side of the display chain than the abnormal occurrence portion is provided from the second interface unit, the video signal being included in the first video signal and the second video signal.

[0194] (22) A system, comprising

[0195] A first controller and a second controller, the first controller and the second controller providing video signals to a display chain including a plurality of daisy-chained display devices and configuring at least a part of a tiled display, wherein

[0196] The first controller includes a first interface unit, the first interface unit being connected to one end of the display chain and for providing a first video signal, the first video signal including a video signal of a part of the chain video displayed by the display chain, and

[0197] The second controller includes a second interface unit, the second interface unit being connected to the other end of the display chain and for supplying a second video signal including the remaining part of the chain video to the other end of the display chain.

[0198] List of reference numerals

[0199] 100 System

[0200] 1 Controller

[0201] 2 Tiled display

[0202] 3 Display device

[0203] 30 Display chain

[0204] 30a One end

[0205] 30b The other end

[0206] 4 Input processing unit

[0207] 41 Detection unit

[0208] 411 Error detection circuit

[0209] 42 Notification unit

[0210] 5 Buffer

[0211] 6 Display processing unit

[0212] 7 Display unit

[0213] IF Interface unit

[0214] VS Video signal

[0215] VS1 Video signal (first video signal)

[0216] VS2 Video signal (second video signal)

[0217] EC1 Error detection code

[0218] EC2 Error detection code.

Claims

1. A display device that is daisy-chained in a display chain configuring at least a part of a tiled display, the display device comprising: a display unit that displays a video corresponding to its own display device in the display chain based on a video signal of a chain video provided to and displayed by the display chain; a first interface unit that acquires a first video signal from one end side of the display chain, the first video signal including a video signal of a part of the chain video; a second interface unit that acquires a second video signal from the other end side of the display chain, the second video signal including a video signal of the remaining part of the chain video; and a display processing unit that causes the display unit to display a corresponding video based on at least one of the first video signal and the second video signal.

2. The display device according to claim 1, wherein the display processing unit when neither the first video signal nor the second video signal has an abnormality, causes the display unit to display a video based on both the first video signal and the second video signal, and when one of the first video signal and the second video signal has an abnormality, causes the display unit to display a video based on the other video signal that has no abnormality.

3. The display device according to claim 2, wherein the display processing unit causes pixels among the pixels of the display unit that should display a video based on the one video signal having an abnormality to display a video based on the other video signal that has no abnormality.

4. The display device according to claim 2, wherein the display processing unit supplements pixels among the pixels of the display unit that should display a video based on the one video signal having an abnormality with pixel values of the other video signal that has no abnormality.

5. The display device according to claim 1, wherein the first video signal includes a video signal of one of the odd rows and the even rows of the chain video, and the second video signal includes a video signal of the other of the odd rows and the even rows of the chain video.

6. The display device according to claim 1, wherein the first video signal includes a video signal of one of the odd columns and the even columns of the chain video, and the second video signal includes a video signal of the other of the odd columns and the even columns of the chain video.

7. The display device according to claim 1, wherein the first video signal includes a video signal of one of the odd frames and the even frames of the chain video, and the second video signal includes a video signal of the other of the odd frames and the even frames of the chain video.

8. The display device according to claim 1, wherein the first video signal includes a video signal corresponding to one of a first pixel and a second pixel that are alternately located in each of the row direction and the column direction of the display unit of the display device connected in the display chain; and The second video signal includes a video signal corresponding to the other pixel of the first pixel and the second pixel in the chained video.

9. The display device according to claim 1, further comprising: A detection circuit that detects whether there is an abnormality in each of the first video signal and the second video signal based on error detection codes included in each of the first video signal and the second video signal.

10. The display device according to claim 1, further comprising: A notification unit that notifies the controller whether there is an abnormality in each of the first video signal and the second video signal, and the controller provides the video signal to the display chain.

11. The display device according to claim 10, wherein One of the first interface unit and the second interface unit acquires a video signal corresponding to the own display device included in the first video signal and the second video signal, the video signal is provided based on the notification from the notification unit, and the display processing unit causes the display unit to display the corresponding video based on the video signal corresponding to the own display device.

12. The display device according to claim 11, wherein When the own display device is set to be closer to one end side of the display chain than the abnormal occurrence part in the display chain, the first interface unit acquires a video signal corresponding to the own display device included in the first video signal and the second video signal, and When the own display device is set to be closer to the other end side of the display chain than the abnormal occurrence part in the display chain, the second interface unit acquires a video signal corresponding to the own display device included in the first video signal and the second video signal.

13. A controller that provides a video signal to a display chain, the display chain includes a plurality of display devices in a daisy chain and is configured to tile at least a part of a display, the controller includes: A first interface unit connected to one end of the display chain and configured to provide a first video signal, the first video signal includes a video signal of a part of the chained video to be displayed by the display chain; And A second interface unit connected to the other end of the display chain and configured to provide a second video signal, the second video signal includes a video signal of the remaining part of the chained video.

14. The controller according to claim 13, wherein The first video signal is provided to the one end of the display chain, and the second video signal is provided to the other end of the display chain.

15. The controller according to claim 13, wherein The first video signal includes a video signal of one of the odd rows and the even rows of the chained video, and The second video signal includes a video signal of the other of the odd rows and the even rows of the chained video.

16. The controller according to claim 13, wherein The first video signal includes a video signal of one of the odd columns and the even columns of the chained video, and The second video signal includes a video signal of the other one of the odd columns and the even columns of the chained video.

17. The controller according to claim 13, wherein, the first video signal includes a video signal of one of the odd frames and the even frames of the chained video, and the second video signal includes a video signal of the other one of the odd frames and the even frames of the chained video.

18. The controller according to claim 13, wherein, the first video signal includes a video signal corresponding to one of a first pixel and a second pixel of the chained video, the first pixel and the second pixel being alternately located in each of a row direction and a column direction of a display unit of a display device connected in the display chain; and the second video signal includes a video signal corresponding to the other one of the first pixel and the second pixel of the chained video.

19. The controller according to claim 13, wherein, notifications regarding whether there is an abnormality in each of the first video signal and the second video signal are received from at least one of the display devices included in the display chain.

20. The controller according to claim 19, wherein, based on the notifications, video signals corresponding to at least one of the display devices included in the first video signal and the second video signal are provided from at least one of the first interface unit and the second interface unit.

21. The controller according to claim 19, wherein, based on the notifications, a portion where an abnormality occurs in the display chain is specified, when at least one of the display devices is set to be closer to the one end side of the display chain than the portion where the abnormality occurs, video signals of at least a part of the display devices that are set to be closer to the one end side of the display chain than the portion where the abnormality occurs are provided from the first interface unit, the video signals being included in the first video signal and the second video signal, and when at least one of the display devices is set to be closer to the other end side of the display chain than the portion where the abnormality occurs, video signals of at least a part of the display devices that are set to be closer to the other end side of the display chain than the portion where the abnormality occurs are provided from the second interface unit, the video signals being included in the first video signal and the second video signal.

22. A system, comprising a first controller and a second controller, the first controller and the second controller providing video signals to a display chain, the display chain including a plurality of display devices in a daisy chain and configured to tile at least a part of a display, wherein, the first controller includes a first interface unit, the first interface unit being connected to one end of the display chain and configured to provide a first video signal, the first video signal including a video signal of a part of a chained video to be displayed by the display chain, and The second controller includes a second interface unit, the second interface unit being connected to the other end of the display chain and being configured to supply a second video signal to the other end of the display chain, the second video signal including a video signal of the remaining part of the chain video.

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