Display system, display unit, and control method

Abstract

This display system is provided with an image data transmitter for transmitting image data, and a plurality of display units that each display, on a display section, partial image data of a preset area corresponding to the own display unit among the image data transmitted by the image data transmitter. Each of the plurality of display units sets two of input / output ports of the own display unit as a main-path input port and a main-path output port for connecting to display units positioned in the preceding and subsequent stages of the own display unit, sets an input / output port other than the main-path input port and the main-path output port as a sub-path input port or a sub-path output port for connecting to a display unit different from the display units positioned in the preceding and subsequent stages of the own display unit, and receives the image data by switching to the sub-path input port when the image data cannot be received through the main-path input port.

Claims

1. A display system comprising: an image data transmitter for transmitting image data; and a plurality of displays for displaying a portion of the image data transmitted by the image data transmitter that corresponds to a preset local display; each of the plurality of displays has at least three input / output ports to communicate the image data transmitted from the image data transmitter, and the image data can be transmitted via a cascaded main path through the input / output ports, and the image data can also be transmitted via a secondary path connected by a different path from the main path; each of the plurality of displays has two of the input / output ports of the local display set as a main path input port and a main path output port for connecting to displays located before and after the local display, and the input / output ports other than the main path input port and the main path output port set as secondary path input ports or secondary path output ports for connecting to displays different from the displays located before and after the local display; and a signal processing unit that switches to the secondary path input port to receive the image data when the image data cannot be received via the main path input port.

2. The display system according to claim 1, wherein the signal processing unit outputs the received image data from the main path output port and the sub-path output port; if the image data cannot be received from the main path input port, it sends a request to transmit the image data to the destination of the sub-path output port, changes the setting of the input / output port that sent the transmission request to an image input port and receives the image data; and if a request to transmit the image data is received from the sub-path input port, it changes the setting of the input / output port that received the transmission request to an image output port and transmits the received image data.

3. The display system according to claim 2, wherein when the signal processing unit receives the image data from the main path input port, it switches to the main path input port to receive the image data and returns the changed input / output port setting to the previous setting.

4. The display system according to claim 3, wherein, when the signal processing unit receives the image data from the main path input port, if the number of times the port receiving the image data is switched from the main path input port is greater than or equal to a threshold, the system maintains the reception of the image data from the switched input / output port and the setting of the changed input / output port.

5. The display system according to any one of claims 1 to 4, wherein each of the plurality of indicators is set with identification information defined for the indicator according to the order of the main path, and the signal processing unit sets an input / output port to the sub-path input port when the identification information of the connection destination of the remaining input / output ports other than the main path input port and the main path output port indicates an upstream of the main path than the identification information of the indicator, and sets an input / output port to the sub-path output port when the identification information of the connection destination of the remaining input / output ports other than the main path input port and the main path output port indicates a downstream of the main path than the identification information of the indicator.

6. The display system according to any one of claims 1 to 4, wherein each of the plurality of displays has three input / output ports, the plurality of displays are arranged in a matrix, and the sub-path input port or sub-path output port provided on the display is located opposite to the sub-path input port or sub-path output port of the preceding display.

7. The display system according to any one of claims 1 to 4, wherein the signal processing unit transmits an abnormality notification, including information indicating the self-indicator, to the image data transmitter when it is unable to receive the image data from the main path input port.

8. A display system comprising: an image data transmitter that transmits image data; and a plurality of displays that display a portion of the image data transmitted by the image data transmitter that corresponds to a preset local display; each of the plurality of displays has at least three input / output ports to communicate the image data transmitted from the image data transmitter, and the image data can be transmitted via a cascaded main path through the input / output ports, and the image data can be transmitted via a secondary path connected by a different path from the main path; when an image data transmission error occurs in the main path, each of the displays after the point of occurrence of the transmission error in the main path recognizes that it cannot receive the image data in the main path; at least one of the displays after the point of occurrence receives the image data from a display connected to its local display by the secondary path and receiving the image data in the main path; and after at least one has received the image data, each of the displays after the point of occurrence receives the image data in the secondary path or the main path.

9. The display system according to claim 8, wherein, among the display units after the point of occurrence, the first display unit is modified to receive the image data via the sub-path if the display unit connected to itself via the sub-path is receiving the image data via the main path.

10. A display unit for a display system comprising an image data transmitter that transmits image data, and a plurality of displays that display a portion of the image data transmitted by the image data transmitter that corresponds to a preset local display unit, wherein each of the plurality of displays has at least three input / output ports to communicate the image data transmitted from the image data transmitter, and the image data can be transmitted via a cascaded main path through the input / output ports, and the image data can be transmitted via a secondary path connected by a path different from the main path, and two of the input / output ports of the local display unit are set as a main path input port and a main path output port for connecting to displays located before and after the local display unit, and the input / output ports other than the main path input port and the main path output port are set as secondary path input ports or secondary path output ports for connecting to displays different from the displays located before and after the local display unit, and the display unit includes a signal processing unit that switches to the secondary path input port to receive the image data when the image data cannot be received via the main path input port.

11. A control method for a display system comprising an image data transmitter that transmits image data, and a plurality of displays that display a portion of the image data transmitted by the image data transmitter that corresponds to a preset local display, wherein each of the plurality of displays has at least three input / output ports to communicate the image data transmitted from the image data transmitter, and can transmit the image data via a cascaded main path through the input / output ports, and can transmit the image data via a secondary path connected by a path different from the main path, and each of the plurality of displays is equipped with a signal processing unit that receives the image data and displays the portion of the image data on the display, two of the input / output ports of the local display are set as main path input ports and main path output ports for connecting to displays located before and after the local display, and the input / output ports other than the main path input ports and main path output ports are set as secondary path input ports or secondary path output ports for connecting to displays different from the displays located before and after the local display, A control method for receiving image data by switching to the secondary input port when the signal processing unit is unable to receive the image data via the main input port.

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