KR20170028810A - Display apparatus and Method for controlling the display apparatus thereof - Google Patents

Abstract

Provided are a display device and a control method thereof. The display device comprises: an image input part performing communication with an external device; and a processor which determines resolution of image content received through the image input part, determines bandwidth for transmitting the received image content to another display device based on the determined resolution, determines a process mode for transmitting the received image content to another display device, and controls the image input part to transmit the processed image content depending on the determined process mode to another display device based on the determined bandwidth.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a display apparatus and a control method thereof,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a display device and a control method thereof, and more particularly, to a display device such as a video wall having a plurality of display devices, in which a display device minimizes signal loss To a display device for fast transmission to another display device and a control method thereof.

Modern display devices include high resolution LFD (Large Format Display), such as multiple full-high definition (FHD) resolution or ultra high definition (UHD) resolution, for use in hospitals, corporate receptions, The use of display systems such as video walls is increasing.

LFD can realize visual effect that various media can be moved together by assembling video wall in various forms using several panels. The video wall is constructed by arranging a matrix of a plurality of digital displays so as to display one large image or a plurality of images. At this time, the display device receives high-resolution image contents such as FHD and UHD from an external source device and transmits the image contents to another plurality of display devices at a high speed. A malfunction of a display device such as a distortion of an image displayed on a screen due to signal loss of image contents transmitted from a display device to another display device may occur during high-speed transmission of the image.

Conventionally, a display interface such as DP1.2 (Display Port 1.2) is used when an LFD video wall (Large Format Display Video) for displaying high-resolution (FHD and UHD) image contents is implemented. DP1.2 prevents malfunction of the display device due to signal loss occurring in the process of transferring image contents from an external source device to a display device or from a display device to another display device.

However, when the resolution input to the display device is UHD, the display device implemented with DP1.2 recognizes the input UHD resolution in the form of four divided FHD data. Therefore, the display device implemented with DP1.2 does not recognize the UHD original data when receiving the UHD image contents from the external source device.

In addition, the display device reduces the bandwidth in the process of recognizing the inputted UHD image contents in the form of FHD (reduced bandwidth). At this time, a bit rate (High Bit Rate) applicable to the UHD is manually input to transmit the processed UHD image contents from the display device to another display device.

Therefore, when the display device recognizes the original data of the input high definition (UHD) image and constructs a video wall for transmitting the data to another display device, the signal loss of the UHD original data input to the display device loss is minimized and transmitted to other display devices quickly.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device and a method of controlling the same that minimize a signal loss of a high-resolution image content received from an external device and quickly transmit the signal to another display device.

According to an aspect of the present invention, there is provided a method of controlling display of a plurality of display devices, the method comprising: receiving high-resolution image content from the outside; Determining a resolution of the received image content; Determining a bandwidth for transmitting the received video content to another display device based on the determined resolution, and determining a processing mode for transmitting the received video content to the another display device; And transmitting the image content processed according to the determined processing mode to the other display device based on the determined bandwidth.

An image processing step of processing the received image contents; And displaying at least a portion of the processed image content, wherein the processing mode further includes a bypass for passing the received image content to the another display device without parsing the received image content, Mode and a repackaging mode for restoring the processed image content and transmitting the restored image content to the other display device.

The determining step may determine one of the bypass mode and the repackaging mode based on the arrangement order of the display devices.

Here, the repackaging mode may be periodically operated in a predetermined arrangement order of the display device and the other display device.

The method of claim 1, further comprising: determining a signal loss rate of the processed video content, wherein determining the processing mode comprises: determining one of the bypass mode and the repackaging mode according to the determined signal loss rate have.

The determining of the processing mode may include determining the repackaging mode if the signal loss rate is greater than or equal to a predetermined value and determining the bypass mode if the signal loss rate is less than a predetermined value.

The step of determining the bandwidth determines the bandwidth as a first bit rate (HBR1) if the resolution of the received video content is the first resolution, If the resolution of the image content is the second resolution, the bandwidth can be determined as the second bit rate (High Bit Rate 2, HBR2).

The receiving step receives the processed image content through a display interface for transmitting to another display device, and the display interface may include a receiving (Rx) terminal and a transmitting (Tx) terminal.

The display device and the other display device may be included in a videowall displaying the processed image content.

According to another aspect of the present invention, there is provided a display device including: an image input unit for performing communication with an external device; Determining a resolution of the high-resolution image content received through the image input unit, determining a bandwidth for transmitting the received image content to another display device based on the determined resolution, A processor for controlling the image input unit to transmit the image content processed in accordance with the determined processing mode to the other display device based on the determined bandwidth, .

The image processing apparatus may further include: an image processing unit for processing the received image contents; And a display unit for displaying at least a part of the processed image contents, wherein the processing mode includes a bypass mode for passing the received image content to the other display device without parsing the received image content, And a display device including a repackaging mode in which the processed image contents are reconstructed and transmitted to the other display device.

The processor may determine one of the bypass mode and the repackaging mode based on the arrangement order of the display devices.

In addition, the repackaging mode may be periodically operated in a predetermined arrangement order of the display device and the other display device.

The processor may determine a signal loss rate of the received image content, and determine one of the bypass mode and the repackaging mode according to the determined signal loss rate.

Also, the processor may determine the repackaging mode when the signal loss rate is equal to or greater than a predetermined value, and may determine the bypass mode if the signal loss rate is less than a predetermined value.

If the resolution of the received image content is the first resolution, the processor determines that the bandwidth is a first bit rate (High Bit Rate 1, HBR1), and if the resolution of the received image content is 2 resolution, the bandwidth can be determined as a second bit rate (High Bit Rate 2, HBR2).

Also, the image input unit may include a display interface for transmitting the processed image contents to another display device, and the display interface may include a receive (Rx) terminal and a transmit (Tx) terminal.

The display device and the other display device may be included in a video wall displaying the processed image contents.

According to various embodiments of the present invention as described above, a display device included in a video wall can minimize signal loss of image contents received from an external device and transmit the signal to another display device at high speed.

1 illustrates a display system, in accordance with an embodiment of the present invention,
2 is a block diagram schematically showing a configuration of a display device according to an embodiment of the present invention;
FIG. 3 is a block diagram showing details of the configuration of a display device according to an embodiment of the present invention;
4A and 4B are diagrams illustrating a method of determining a bandwidth according to an input resolution according to an embodiment of the present invention;
5A and 5B are diagrams illustrating a method of processing image content according to an input resolution, according to an embodiment of the present invention;
6 is a flowchart illustrating a method of operating a processor of a display device according to an embodiment of the present invention,
7 is a sequence diagram for explaining a control method of a display system according to an embodiment of the present invention.

These embodiments are capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that it is not intended to limit the scope of the specific embodiments but includes all transformations, equivalents, and alternatives falling within the spirit and scope of the disclosure disclosed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the embodiments of the present invention,

The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the claims. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprising ", or" comprising ", and the like, are not intended to preclude the presence or addition of features, numbers, steps, operations, elements, parts, or combinations thereof described in the specification .

In the embodiment, 'module' or 'sub' performs at least one function or operation, and may be implemented in hardware or software, or a combination of hardware and software. In addition, a plurality of 'modules' or a plurality of 'parts' may be integrated into at least one module except for 'module' or 'module' which need to be implemented by specific hardware, and implemented by at least one processor (not shown) .

Hereinafter, the present invention will be described in more detail with reference to the drawings. 1 is a diagram illustrating a display system in accordance with an embodiment of the present invention. 1, the display system 10 includes a plurality of display devices 100-1 to 100-8 connected to each of the display devices 100- 1 to 100-8.

At this time, the external source device 50 may be implemented as an electronic device such as a computer, a host device, or other display devices 100-1 through 100-8. In addition, the display system 10 includes an LFD video format (Large Format Display Video) in which a plurality of full high definition (FHD) and ultra high definition (UHD) resolution display devices 100 are connected in a loop- . ≪ / RTI > However, the above-described example is merely an example, and can be implemented in various display systems that display one image using a plurality of display devices 100. [

At this time, the plurality of display apparatuses 100-1 to 100-8 can display the high-resolution image contents (FHD image, UHD image, etc.) at high speed on the entire display device 100, Lt; / RTI > need not be lost. If each of the signal data received by the plurality of display devices 100-1 to 100-8 is significantly different, the viewer who views the display system 10 can view the distorted image. Therefore, in order to reduce the distortion or loss of each signal value input to the plurality of display apparatuses 100-1 to 100-8, the plurality of display apparatuses 100-1 to 100-8 can display the respective image contents There is a need to control.

Specifically, in the embodiment of the present invention, the display apparatus 100 determines (FHD and UHD) the resolution of the image content input from the external source device 50, and outputs the received image content based on the determined resolution It is possible to determine a bandwidth for transmission to the other display device 100. [ The bandwidth can be determined as a first bit rate (High Bit Rate 1, HBR1) when the resolution of the image content received by the display device 100 from the external source device 50 is the first resolution. On the other hand, when the resolution of the image content received from the external source device 50 is the second resolution, the bandwidth of the display device 100 can be determined as the second bit rate (High Bit Rate 2, HBR2).

Then, the display device 100 can determine a processing mode for transmitting the image contents received from the external source device 50 to the other display devices 100-1 to 100-8. The processing mode may be a bypass mode or a repackaging mode. The bypass mode is a mode in which the first display device 100-1 does not parse the image content received from the external source device 50 and transmits the parsed image content to the second display device 100-2 at a determined bit rate through mode to reduce the on time. On the other hand, in the repackaging mode, when the first display device 100-1 transmits the image content received from the external source device 50 to the second display device 100-2 at the determined bit rate, Is restored and transmitted. The repackaging mode has an advantage of restoring the lost signal although the on-time is longer than the bypass mode.

The processing mode of the display apparatus 100 is a mode in which the plurality of display apparatuses 100-1 to 100-8 are arranged in a video wall composed of an array of matrices, One of the repackaging modes can be determined.

The repackaging mode may be determined to operate periodically in a predetermined arrangement order among the display devices 100-1 to 100-8 to prevent signal loss of the image processed in the display device 100 or to recover the lost signal have.

The bypass mode and the repackaging mode can be determined according to the signal loss rate of the image content processed by the display device 100 regardless of the arrangement position in the video wall of the display device 100. [ That is, when the signal loss rate of the video content processed by the first display device 100-1 is equal to or greater than a predetermined value, the processing mode restores the signal loss of the processed video image and transmits it to the second display device 100-2 Repackaging mode. On the other hand, when the signal loss rate of the video content processed by the first display device 100-1 is less than a preset value, the processing mode does not parse the processed video image and transmits it to the second display device 100-2 or pass-through mode.

Referring to FIG. 1, the first display device 100-1 receives a high-resolution image from the external source device 50 and determines the resolution (for example, FHD or UHD) of the input image content. The first display device 100-1 determines a bandwidth for transmitting the image content received from the external source device 50 to the second display device 100-2 based on the determined resolution. The first display device 100-1 determines a processing mode for transmitting the image content received from the external source device 50 to the second display device 100-2, And transmits the processed image content to the second display device 100-2 according to the determined processing mode.

The second display device 100-2 receives the image content processed by the first display device 100-1. The second display device 100-2 determines the resolution of the image received from the first display device 100-1. The second display device 100-2 determines a bandwidth for transmitting the image content received from the first display device 100-1 to the third display device 100-3 based on the determined resolution . The second display device 100-2 determines a processing mode for transmitting the image content received from the first display device 100-1 to the third display device 100-3, And transmits the processed image content to the third display device 100-3 according to the determined processing mode.

Therefore, in the above-described embodiments of the present invention, the plurality of display apparatuses 100-1 to 100-8 constituting the video wall are respectively connected to the external source apparatus 50 or other display apparatuses 100-1 to 100-8 Resolution image, and determines the resolution of the input image. Each of the display devices 100-1 to 100-8 determines the bandwidth for transmitting the received image to the other display devices 100-1 to 100-8 based on the determined resolution, Determines the processing mode for transmitting the content to the other display devices 100-1 to 100-8, and determines the processing mode determined by the display devices 100-1 to 100-8 based on the determined bandwidth To the other display devices 100-1 to 100-8.

According to the various embodiments of the present invention as described above, the display apparatus 100 included in the video wall minimizes the signal loss of the image contents received from the external source apparatus 10, To 100-8).

2 is a block diagram briefly showing a configuration of a display device 100 according to an embodiment of the present invention. As shown in FIG. 2, the display apparatus 100 includes an image input unit 110 and a processor 120.

The image input unit 110 performs communication with the external source device 50. Particularly, the video input unit 110 can receive the video content from the external source device 50. At this time, the external source device may be implemented as, for example, a computer, a host device, or another display device.

The image input unit 110 includes a display interface for transmitting the image content received by the first display device 100-1 from the external source device 50 to the second display device 100-2 And the display interface may include a receive (Rx) terminal and a transmit (Tx) terminal.

The processor 120 controls the overall function of the display device 100 to process the image content received from the external source device 50. [ In particular, the processor 120 determines the resolution of the image content input from the external source device 50. The processor 120 determines a bandwidth for transmitting the processed image to the other display devices 100-1 to 100-8 based on the resolution of the image determined by the display device 100. [

The processor 120 determines a processing mode for minimizing the signal loss of the image contents processed on the basis of the bandwidth determined by the display apparatus 100. [ The processor 120 may determine at least one of a bypass mode and a processing mode of the repackaging mode. The bypass mode is a mode in which the first display device 100-1 passes through the second display device 100-2 without parsing the image content received from the external source device 50 . The repackaging mode is a mode in which the first display device 100-1 reconstructs an image received from the external source device 50 and transmits the reconstructed image to the second display device 100-2.

In addition, the processor 120 can determine one of the bypass mode and the repackaging mode based on the arrangement position of the display device 100 in a video wall in which a plurality of display devices 100 are arranged in the form of a matrix have. At this time, the processor 120 may be configured to periodically determine the repackaging mode in the display device 100 located in the specific arrangement.

The processor 120 may determine the signal loss rate of the image content processed by the display device 100 and determine one of the bypass mode and the repackaging mode according to the determined signal loss rate. That is, the processor 120 may be configured to determine the processing mode of the display device 100 as a repackaging mode when the signal loss rate of the image processed by the display device 100 is equal to or greater than a predetermined value. When the signal loss rate of the image processed by the display device 100 is less than a predetermined value, the processor 120 can determine the processing mode of the display device 100 as the bypass mode.

Hereinafter, the present invention will be described in more detail with reference to FIG. 3 is a block diagram illustrating the configuration of the display device 200 in detail, according to an embodiment of the present invention. 3, the display device 200 includes an image input unit 210, an image processing unit 220, a display unit 230, a memory 240, an audio output unit 250, an input unit 260, (270) and a processor (280).

The image input unit 210 performs communication with various types of external devices according to various types of communication methods. In particular, in an embodiment of the present invention, the image input unit 210 can transmit and receive high-resolution image contents such as FHD or UHD from the external source device 50 to the display device 100. [ In addition, the image input unit 210 can transmit and receive the image contents processed by the processor 120 in the first display device 100-1 to the second display device 100-2.

The image input unit 210 includes a display interface for transmitting the image content received by the first display device 100-1 from the external source device 50 to the second display device 100-2 And the display interface may include a receive (Rx) terminal and a transmit (Tx) terminal.

The image input unit 210 includes a digital display interface including a reception terminal Rx and a transmission terminal Tx such as a DP1.2 (Display Port) supporting stream transmission of a high-resolution image can do. DP1.2 is only one embodiment of the present invention, and can be modified by various display interfaces supporting stream transmission of high-resolution images.

The image processing unit 220 is a component that performs image processing on image data obtained from the image input unit 210. The image processing unit 220 may perform various image processing such as decoding, scaling, noise filtering, frame rate conversion, resolution conversion, and the like on the image data. In particular, the image processing unit 220 can process the image content processed through the processor 120. [

The display unit 230 displays at least one of the image contents processed through the processor 120 and received from the image input unit 210 and various UIs processed from the graphic processing unit 283. [ In particular, the display unit 230 displays at least one of the image contents processed by the processor 120.

In particular, when the display device 200 is implemented as one of the video walls, the display unit 230 can display only a part of the input image contents.

The memory 240 stores various modules for driving the display device 200. For example, the memory 240 may store software including a base module, a sensing module, a communication module, a reservation module, a web browser module, and a service module. In this case, the base module is a base module for processing a signal transmitted from each hardware included in the display device 200 and transmitting the signal to the upper layer module. The sensing module is a module for collecting information from various sensors and analyzing and managing the collected information, and may include a face recognition module, a voice recognition module, a motion recognition module, and an NFC recognition module. The presentation module is a module for constructing a display screen, and may include a multimedia module for reproducing and outputting multimedia contents, a UI, and a UI rendering module for performing graphic processing. The communication module is a module for performing communication with the outside. A web browser module refers to a module that accesses a web server by performing web browsing. A service module is a module including various applications for providing various services.

Particularly, when the first display device 100-1 transmits the image content received from the external source device 50 to the second display device 100-2, the memory 240 minimizes the signal loss of the transmitted data And modules that perform functions to keep the on-time speed at which the image is processed as fast as possible. In particular, the memory 240 may store a receiving module, a resolution determining module, a bandwidth determining and processing mode determining module.

More specifically, the receiving module determines that an image is input from the external source device 50 to the display device 100. [ The resolution determination module determines whether the resolution received by the display device 100 from the external source device 50 is FHD or UHD. In addition, the bandwidth determination and processing mode determination module transmits the received image to the second display device 100-2 based on the resolution received by the first display device 100-1 from the external source device 50 And determines at least one of a bypass mode and a repackaging mode based on the determined bandwidth.

At this time, the processing mode is a mode in which the first display device 100-1 passes through the second display device 100-2 without parsing the image content received from the external source device 50 A bypass mode and a repackaging mode in which the first display device 100-1 restores the processed image content and transmits the restored image content to the second display device 100-2.

As described above, the memory 240 may include various program modules, but it is needless to say that the various program modules may be omitted, modified or added depending on the type and characteristics of the display device 200. For example, when the display device 200 is implemented as a tablet PC, the base module may further include a position determination module for determining a GPS-based position, and the sensing module may further include a sensing module can do.

The audio output unit 250 is configured to output various kinds of audio data processed by an audio processing unit (not shown), as well as various kinds of notifications and voice messages.

The input unit 260 receives various user operations for controlling the display device 200. The input unit 280 may be implemented with various input devices such as a remote controller, a voice input unit, a motion input unit, and a pointing device in order to receive a user operation.

The communication unit 270 may include various communication chips such as a Wi-Fi chip, a Bluetooth chip, an NFC chip, a wireless communication chip, and the like. At this time, the Wi-Fi chip, the Bluetooth chip, and the NFC chip communicate with each other using the LAN method, the WiFi method, the Bluetooth method, and the NFC method. Among these, the NFC chip refers to a chip operating in an NFC (Near Field Communication) system using 13.56 MHz band among various RF-ID frequency bands such as 135 kHz, 13.56 MHz, 433 MHz, 860 to 960 MHz and 2.45 GHz. When a Wi-Fi chip or a Bluetooth chip is used, various connection information such as an SSID and a session key may be transmitted and received first, and communication information may be used to transmit and receive various information. The wireless communication chip refers to a chip that performs communication according to various communication standards such as IEEE, ZigBee, 3G (3rd Generation), 3rd Generation Partnership Project (3GPP), LTE (Long Term Evolution)

The processor 280 controls the overall operation of the display device 200 using various programs stored in the memory 240. The processor 280 includes a RAM 281, a ROM 282, a graphics processing unit 283, a main CPU 284, first through n interfaces 285-1 through 285-n, Bus 286. At this time, the RAM 281, the ROM 282, the graphics processing unit 283, the main CPU 284, the first to n interfaces 285-1 to 285-n, etc. can be connected to each other via the bus 286 .

A ROM 282 stores a command set for booting the system and the like. When the turn-on command is input and power is supplied, the main CPU 284 copies the O / S stored in the memory 240 to the RAM 281 according to the instruction stored in the ROM 282, executes O / S Boot the system. When the booting is completed, the main CPU 284 copies various application programs stored in the memory 240 to the RAM 281, executes the application program copied to the RAM 281, and performs various operations.

The graphic processing unit 283 generates a screen including various objects such as a pointer, an icon, an image, and a text using an operation unit (not shown) and a rendering unit (not shown). The operation unit calculates an attribute value such as a coordinate value, a shape, a size, a color, and the like to be displayed by each object according to the layout of the screen using the control command received from the input unit. The rendering unit generates screens of various layouts including the objects based on the attribute values calculated by the operation unit. The screen generated by the rendering unit is displayed in the display area of the display unit 230.

The main CPU 284 accesses the memory 240 and performs booting using the O / S stored in the memory 240. [ The main CPU 284 performs various operations using various programs stored in the memory 240, contents, data, and the like.

The first through n interfaces 285-1 through 285-n are connected to the various components described above. One of the interfaces may be a network interface connected to an external device via a network.

Particularly, when the first display device 100-1 transmits the image content received from the external source device 50 to the second display device 100-2, the processor 280 minimizes the signal loss of the transmitted image And maintains the on time speed of the display device 100 as fast as possible.

Specifically, the processor 280 determines the resolution of the image received from the external source device 50 by the first display device 100-1. The processor 120 transmits the image processed by the first display device 100-1 to the second display device 100-2 based on the resolution of the image received by the first display device 100-1 And determines the bandwidth to be used.

In addition, the processor 280 determines a processing mode for processing image contents based on the bandwidth determined by the first display device 100-1, as a bypass mode or a repackaging mode. The processor 120 then transmits the image content processed in accordance with the determined processing mode based on the bandwidth determined by the first display device 100-1 to the second display device 100-2, Lt; / RTI >

Specifically, in the embodiment of the present invention, the first display device 100-1 of the processor 280 determines whether the resolution of the image content received from the external source device 50 is FHD or UHD. At this time, when the display device 100 receives the high-resolution image content from the external source device 50, the processor 280 can automatically recognize the original resolution of the image content of the FHD or UHD.

In other words, when the first display device 100-1 receives the UHD resolution image content from the external source device 50, the processor 280 recognizes the input UHD data as four FHD resolution images input So that the UHD resolution original data can be recognized as being input without reducing the bandwidth.

The processor 280 may also be configured to transmit data processed by the first display device 100-1 to the second display device 100-2 based on the resolution determined by the first display device 100-1 Determine the bandwidth. Specifically, when the image content of the FHD resolution is input to the first display device 100-1, the processor 280 determines the bandwidth as the first bit rate (HBR1) value. When the UHD resolution image content is input to the first display device 100-1, the processor 280 determines the bandwidth as a second bit rate (HBR2) value.

When a plurality of display apparatuses 100 implement an LFD video wall (Large Format Display Video) using DP1.2 (Display Port 1.2) supporting stream transmission of high resolution images, DP1.2 (1 lane, 2 lane, 4 lane) for transmitting the image contents processed by the first display device 100-1 to the second display device 100-2. In this case, the bit rate per lane differs depending on the resolution of the image content input to the display device 100. [

That is, when the first display device 100-1 receives the FHD image content from the external source device 50, DP1.2 provides 2.7 gigabits per second (2.7 Gbit / s) per lane. At this time, the processor 280 sets the bandwidth for transmitting the FHD image input to the first display device 100-1 to the second display device 100-2 to be 2.7 Gigabits / second for each lane of DP1.2 1 bit rate (HBR1).

On the other hand, when the first display device 100-1 receives UHD image content from the external source device 50, DP1.2 provides 5.4 Gbit / s (5.4 Gbit / s) for each lane. At this time, the processor 280 sets the bandwidth for transmitting the UHD image input to the first display device 100-1 to the second display device 100-2 to 5.4 Gigabits per second for each lane of DP1.2 2 bit rate (HBR2).

Here, in another embodiment of the present invention, even when the first display device 100-1 receives image contents of a higher resolution than the UHD from the external source device 50, The image processed in the first display device 100-1 can be transmitted to the second display device 100-2 while maintaining the original resolution of the image content input to the device 100-1.

Specifically, for example, DP1.3 (Display Port 1.3) has a third bit rate (High Bit Rate 3, HBR3) of 8.1 gigabits / second (8.1 Gbit / s) for each lane for transmission of a higher resolution image than UHD, Lt; / RTI > Accordingly, when the first display device 100-1 receives an image of UHD resolution or higher from the external source device 50, the processor 280 converts the image data processed by the first display device 100-1 into the second The bandwidth to be transmitted to the display device 100-2 can be determined as a third bit rate (High Bit Rate 3, HBR3) having 8.1 gigabits / second per each lane.

The processor 280 determines whether the image content received from the external source device 50 is to be transmitted to the other display devices 100-1 to 100-8 based on the bandwidth determined by the display device 100 The processing mode can be determined. The processing mode is either a bypass mode or a repackaging mode.

The bypass mode is a mode in which the first display device 100-1 does not parse the image content received from the external source device 50 and transmits the parsed image content to the second display device 100-2 at a determined bit rate through mode to reduce the on time. On the other hand, in the repackaging mode, when the first display device 100-1 transmits the image content received from the external source device 50 to the second display device 100-2 at the determined bit rate, Is restored and transmitted.

In this case, the bypass mode is advantageous in that the on-time is short so that the display device 100 can quickly transfer the image data received from the external source device 50 to the other display devices 100-1 to 100-8. On the other hand, in the repackaging mode, the on-time is longer than the bypass in the process of restoring the signal loss of the processed video contents. However, in the repackaging mode, the display device 100 restores the image data received from the external source device 50, minimizes the signal loss of the transmitted image content, and transmits the image data to the other display devices 100-1 to 100-8 .

Therefore, when transmitting high-resolution video content from a video wall made up of a plurality of display devices 100, the bypass mode and the repackaging mode are variably combined to minimize the signal loss and transmit the video content at high speed, Can be displayed.

Specifically, for example, in a video wall implemented with a DP1.2 (Display Port) supporting stream transmission of a high-resolution image, DP1.2 is input from the external source device 50 in the first display device 100-1 And transmits the received image contents to the second display device 100-2 in a packet form. Therefore, when the display device 100 compares the data received from the external source device 50 with the previous value and there is an intermittent data corruption (signal loss) Processing the received video data in the repackaging mode, reconstructs the lost data, and packs the restored data to the second display device 100-2.

In addition, in an embodiment of the present invention, the first display device 100-1 may receive not only the DP 1.2 (Display Port 1.2) but also the HDMI (High-Definition Multimedia Interface) and the DVI ) Can receive various source signals through a digital interface. In this case, even if the first display device 100-1 receives various source signals from the external source device 50 through various digital interfaces, the repackaging mode according to the embodiment of the present invention may be performed by the first display device 100-1 100-1 may output the DP1.2 signal having the DPCD (Display Port Configuration Data) and transmit the DP1.2 signal to the second display device 100-2.

Specifically, the AUX channel (AUX CH) constituting the DP 1.2 can manage the link service between the sink device 100-1 and the source device 50 connected with DP 1.2. At this time, the link service is used for discovery, configuration, and maintenance of the link between the sink device 100-1 and the source device 50 connected through DP1.2. The AUX channel can read / write access (DisplayPort Configuration Data) access to access link services.

Here, DPDP (Display Port Configuration Data) is data mapped to the display port address area of the sink device 100-1 to which DP 1.2 is connected. The source device 50 connected to DP1.2 can read the status of the display port link and the status of the sink device 100-1 and the possibility of signal reception from the DPCD address.

Therefore, according to an embodiment of the present invention, even if the first device 100-1 receives a signal through various digital interfaces, the first device 100-1 can transmit the DP1.2 signal having the DPCD to the second device 100-1, (100-2). Accordingly, when the first device 100-2 transmits the image content received from the external source device 50 to the second device 100-2 via the digital interface other than the DP1.2, 100-2) can additionally improve the processing speed of the video contents in the video wall since it is not necessary to convert signals of other digital interfaces such as HDMI and DVI to DP1.2 signals.

As described above, in the bypass mode, the speed at which the first display device 100-1 processes the image content received from the external source device 50 and transmits the processed image content to the second display device 100-2 is fast. However, when processing the image contents received in the bypass mode continuously in the plurality of display apparatuses 100-1 through 100-8, the display apparatus 100- Distortion may occur. (n = 1, 2, 3, ..., n)

Therefore, in order to prevent the above-described problem, the processor 280 is configured so that in the video wall in which the arrangements of the plurality of display apparatuses 100-1 to 100-8 are arranged in a matrix, the display apparatuses 100-n Th < / RTI > period), it can be implemented to determine the repackaging mode periodically.

The processor 280 determines the signal loss rate of the video content received from the external source device 50 by the display device 100 regardless of the arrangement of the plurality of display devices 100-1 to 100-8 , And when the signal loss rate of the image processed by the display device 100 is equal to or greater than a preset value, the mobile terminal can determine the repackaging mode. Meanwhile, the processor 280 may be configured to determine the bypass mode when the signal loss rate of the image processed by the display device 100 is less than a predetermined value.

For example, in the process of transforming the image content received by the first display device 100-1 from the external source device 50 into a DP1.2 packet in the first display device 100-1, A signal loss may occur irrespective of the resolution input to the first display device 100-1. At this time, the processor 280 determines the signal loss rate of the image data generated by the first display device 100-1. If the signal loss rate of the image processed by the first display device 100 is equal to or higher than the predetermined value, The data can be processed in a repackaging mode to restore the data.

In order to reduce the on-time of the second display device 100-2, the second display device 100-2 receives the image content processed in the first display and does not parse the data, 3 display device 100-3 in a bypass mode.

Hereinafter, the present invention will be described in more detail with reference to Figs. 4A to 5B. 4A and 4B are diagrams illustrating a method of determining a bandwidth according to a resolution of an input image in order to transmit an image input from the external source device 50 to the display devices 100-1 to 100-4 to another display device Fig. 2 is a diagram illustrating a method of the present invention.

The first display device 100-1 determines the resolution of the image content input from the external source device 50. [ The first display device 100-1 determines a bit rate for transmitting the image content processed by the display device 100-1 to the second display device 100-2 based on the determined resolution. When the resolution of the image input from the external source device 50 to the first display device 100-1 is FHD, the first display device 100-1 determines the first bit rate, The first display device 100-1 determines the second bit rate.

4A, when the first display 100-1 receives the FHD resolution image from the external source device 50, the first display device 100-1 to the fourth display device 100-4 And transmits the image contents processed by the respective display devices 100-1 to 100-4 to the other display devices 100-1 to 100-4 at the first bit rate HBR1.

4B, when the first display device 100-1 receives the image content of the UHD resolution from the external source device 50, the first display device 100-1 to the fourth display device 100-1, The display device 100-4 transmits the image processed by each of the display devices 100-1 through 100-4 to the other display devices 100-1 through 100-4 at the second bit rate HBR2.

However, the above-described examples are merely one embodiment and can be modified in accordance with the input resolution. For example, when the FHD is input from the external device to the first display 100-1 to the second display 100-2, each of the display devices 100-1 to 100-2 outputs the first bit rate HBR1). Also, when receiving the UHD data in the third display 100-3, the bit rate value of the third display 100-3 may be transmitted at the second bit rate HBR2.

5A and 5B, more specifically, on the basis of the bandwidth determined on the basis of the resolution input to the display device 100, A method for determining a processing mode for transmitting the processed image to the other display devices 100-1 to 100-4 will be described.

The first display device 100-1 can determine a processing mode for processing the image content according to a bandwidth determined based on the resolution of the image input from the external source device 50. [ The processing mode is either a bypass mode or a repackaging mode.

Here, the bypass mode does not parse the image content received from the external source device 50 by the first display device 100-1 and transmits the parsed image content to the second display device 100-2 at the determined bit rate (on-time) by pass-through. On the other hand, in the repackaging mode, when the first display device 100-1 transmits the image content received from the external source device 50 to the second display device 100-2 at the determined bit rate, Is restored and transmitted.

At this time, the bypass mode is advantageous in that the on time of the display device 100 is short and data can be transmitted quickly. On the other hand, in the repackaging mode, the on-time of the display device 100 is longer than the bypass in the process of restoring the signal loss of the image contents processed by the display device 100, but the processed data is restored to minimize the signal loss .

Also, in an embodiment of the present invention, for example, in a video wall implemented through DP 1.2 (Display Port 1.2), the repackaging mode may be set to DP1. DP1 with Display Port Configuration Data (DPCD). 2 signal to the other display device to improve data processing speed.

Therefore, in a video wall in which a plurality of display devices 100 are configured in a matrix, when the display device 100 transmits the high-resolution image content input from the external source device 50 to another display, the bypass mode and the repackaging mode So that the video content can be displayed on the video wall by minimizing the signal loss and transmitting the video content at high speed.

At this time, the repackaging mode is periodically determined at a predetermined arrangement position of the display device 100, and the lost signal is reconstructed to transmit the image processed by the other display devices 100-1 to 100-4 have.

The plurality of display apparatuses 100 determine the signal loss rate of the image content that the display apparatus 100 has received and processed from the external source apparatus 50 regardless of the positional arrangement, If the signal loss rate of the data is equal to or greater than a predetermined value, the processing mode in the display device 100 can be determined as the repackaging mode. On the other hand, when the signal loss rate of the data processed by the display device 100 is less than a predetermined value, the processing mode in the display device 100 can be determined as the bypass mode.

5A, a first display device 100-1 receives an FHD resolution image from an external source device 50 through a digital interface such as HDMI and DVI, as well as DP1.2, in accordance with an embodiment of the present invention. The first display device 100-1 can determine the repackaging mode to restore the signal loss of the image data received from the external source device 50 and transmit the restored signal loss to the second display device 100-2 have.

Also, even if the first display device 100-1 receives various source signals for the FHD resolution image from the external source device 50 through various digital interfaces, the first display device 100 may display a DPDP Data may be output and sent to another display device. Accordingly, in the first display device 100-1, the image data received from the external source device 50 is processed in the repackaging mode, thereby reducing the signal loss of the received image data and improving the processing speed of the image data .

The second display device 100-2 passes data processed by the first display device 100-1 to the third display device 100-3 without parsing, ) Can be determined to be short. The third display device 100-3 can pass the data processed by the second display device 100-1 to the fourth display device (not shown) without parsing, and can determine the bypass mode for keeping the on time short have.

The n-th display device 100-n can determine the repackaging mode for restoring the signal loss of the data processed by the n-1-th display device (not shown) and transmitting it to the (n + 1) th display device have. The on-time is shortened by passing through the display device (not shown) without parsing the input data from the (n + 1) th display device (not shown) The bypass mode can be determined. Finally, the Nth display device 100-N, which is the final display device of the video wall, can determine the bypass mode.

According to one embodiment of the present invention, referring to FIG. 5B, the first display device 100-1 receives a UHD resolution image from the external source device 50 via a digital interface such as HDMI and DVI as well as DP1.2 The first display device 100-1 can determine the repackaging mode to restore the signal loss of the image data received from the external source device 50 and transmit the restored signal loss to the second display device 100-2 have.

In addition, even if the first display device 100-1 receives various source signals for the UHD resolution image from the external source device 50 through various digital interfaces, the first display device 100 displays a DPDP Data may be output and sent to another display device. Accordingly, in the first display device 100-1, the image data received from the external source device 50 is processed in the repackaging mode, thereby reducing the signal loss of the received image data and improving the processing speed of the image data .

The second display device 100-2 passes data processed by the first display device 100-1 to the third display device 100-3 without parsing, ) Can be determined to be short. The third display device 100-3 can pass the data processed by the second display device 100-1 to the fourth display device (not shown) without parsing, and can determine the bypass mode for keeping the on time short have.

The n-th display device 100-n can determine the repackaging mode for restoring the signal loss of the data processed by the n-1-th display device (not shown) and transmitting it to the (n + 1) th display device have. The on-time is shortened by passing through the display device (not shown) without parsing the input data from the (n + 1) th display device (not shown) The bypass mode can be determined. Finally, the Nth display device 100-N, which is the final display device of the video wall, can determine the bypass mode.

However, although the embodiment shown in Figs. 5A and 5B is only one embodiment for the practice of the present invention, although the first display device 100-1 is not shown from the external source device 50 to the FHD or UHD When the image is input, the first display device 100-1 determines the repackaging mode, the second display device 100-2 determines the bypass mode, and the third display device 100-3 determines the bypass mode, And a fourth display device (not shown) may determine the repacking morphology at a predetermined arrangement position of the display device 100, and may be implemented in various variable combinations.

Specifically, for example purposes, when the first display device 100-1 receives the FHD image from the external source device 50, the repackaging mode may be determined for each of the nth display devices 100-n. For illustrative purposes, if n is a number from 1 to 100, then 100 display devices may be said to be connected by a video wall. Here, the arrangement position of the device in which the repackaging mode is periodically set can be determined by the display device 100-8n at a position of multiples of 8 such as n = 8, 16, 24, ...,

When the first display device 100-1 receives an image of the UHD from the external source device 50, the first display device 100-1 may be configured to apply the repackaging mode to the nth display device 100-n. For illustrative purposes, if n is a number from 1 to 25, then 25 display devices are connected by a video wall. Here, the arrangement position of the device in which the repackaging mode is periodically set can be determined by the display device 100-12n located at a multiple of 12 such as n = 12, 24, and so on.

In another embodiment (not shown), the first display device 100-1 determines a repackaging mode, and the second display device 100-2 determines a repackaging mode in a bypass mode Or the repackaging mode can be determined.

The above-described examples are only one embodiment of the present invention, and the bypass mode and the repackaging mode may be selected based on the position of the predetermined arrangement of the display apparatus 100 and the signal loss rate of the data processed by the display apparatus 100 The processing mode can be implemented by variable combination in various ways.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 6 and 7. FIG. 6 is a flowchart illustrating a method of controlling an image received from an external source device 50 by the display apparatus 100 according to an embodiment of the present invention.

First, the display apparatus 100 determines the resolution of the image content s610 received through the image input unit 110 (s620). Specifically, the display apparatus 100 can automatically recognize and determine the original resolution data (FHD and UHD) of the image content received from the external source device 50. The display device 100 determines a bandwidth for transmitting the received image content to the other display devices 100-1 to 100-8 based on the determined resolution, To the other display devices 100-1 to 100-8 (S630).

At this time, the processing mode is either the bypass mode or the repackaging mode. The bypass mode is a mode in which the first display device 100-1 does not parse the image content received from the external source device 50 and transmits the parsed image content to the second display device 100-2 at a determined bit rate through mode to reduce the on time. On the other hand, in the repackaging mode, when the first display device 100-1 transmits the image content received from the external source device 50 to the second display device 100-2 at the determined bit rate, Is restored and transmitted.

At this time, the repackaging mode is periodically determined at a predetermined arrangement position of the display device 100, and the lost signal is reconstructed to transmit the processed image to the other display devices 100-1 to 100-8. have.

The display device 100 determines the signal loss rate of the image content received from the external source device 50 and processed by the display device 100 regardless of the arrangement of the plurality of display devices 100, If the signal loss rate of the data is equal to or greater than a predetermined value, the processing mode in the display device 100 can be determined as the repackaging mode. On the other hand, when the signal loss rate of the data processed by the display device 100 is less than a predetermined value, the processing mode in the display device 100 can be determined as the bypass mode.

The display device 100 displays the image content processed in accordance with the determined processing mode based on the bandwidth determined according to the resolution of the image received from the external source device 50 to the other display devices 100-1 to 100- -8) (s640).

Therefore, in a video wall in which a plurality of display apparatuses 100 are constituted by a matrix, the display apparatus 100 displays the high-resolution image contents inputted from the external source apparatus 50 on the other display apparatuses 100-1 to 100-8. , The bypass mode and the repackaging mode can be variably combined to keep the loop out on time as short as possible and to minimize the signal loss so that the same high resolution video content can be displayed rapidly throughout the video wall .

Here, the loop-out on time is a time required for the second display device 100-2 to be turned on after the screen of the first display device 100-1 is turned on in a video wall connected to the plurality of display devices 100, And the time before the screen of the display unit is turned on. That is, in the embodiment of the present invention, the processor 120 can variably combine the processing modes to shorten the time taken for the plurality of display apparatuses 100 to turn on the screen from the first set to the last set in the video wall connected to each other Can

FIG. 7 is a sequence diagram illustrating a method of controlling an image content received from an external source device 50 according to an exemplary embodiment of the present invention. Referring to FIG. First, the external source device 50 transmits the image content to the first display device 100-1 (s710). At this time, the first display device 100-1 can be connected to the external source device 50 and the second display device 100-2 using a display interface, and the display interface input Rx and the output Tx The bit rate of the processed image content can be transmitted.

Then, the first display device 100-1 determines the resolution of the image content received from the external source device 50 (S720) and displays the corresponding image content (S730).

In addition, the first display device 100-1 determines a bandwidth for transmitting the processed image to the second display device 100-2 based on the determined resolution of the image content, and determines a processing mode (S740). Specifically, the processing mode is a bypass mode or a repackaging mode.

Then, the first display device 100-1 transmits the processed image content to the second display 100-2 based on the determined bandwidth (s750).

The second display device 100-2 determines the resolution of the image content received from the first display device 100-1 based on the image content processed in the first display device 100-1 s760). The second display device 100-2 displays the determined resolution (s770). The image content processing method displayed by the second display device 100-2 is the same as the processing method of the first display device 100-1.

The video wall connected to the plurality of display apparatuses 100 by the display system 10 as described above is capable of displaying a loop out time when looping out the high resolution image contents received from the external source apparatus 50 to another display on time can be kept as short as possible while signal loss can be minimized so that clear video content can be transmitted and displayed at high speed.

Meanwhile, the display method according to the above-described various embodiments may be implemented by a program and provided to the display device 100 or the input device. In particular, the program including the control method of the display device 100 may be stored in a non-transitory computer readable medium.

A non-transitory readable medium is a medium that stores data for a short period of time, such as a register, cache, memory, etc., but semi-permanently stores data and is readable by the apparatus. In particular, the various applications or programs described above may be stored on non-volatile readable media such as CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM,

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

110, 210: image input unit 120, 280: processor
220: image processor 230: display
240: memory 250: audio output section
260: input unit 270: communication unit

Claims (18)

In the display device,
A video input unit for performing communication with an external device; And
Determines a resolution of the image content received through the image input unit, determines a bandwidth for transmitting the received image content to another display device based on the determined resolution, A processor for determining the processing mode for transmission to another display apparatus and controlling the image input unit to transmit the image content processed according to the determined processing mode to the other display apparatus based on the determined bandwidth, / RTI > The method according to claim 1,
An image processing unit for processing the received image contents;
And a display unit for displaying at least a part of the processed image contents,
The processing mode includes:
A bypass mode for passing the received image content to the other display device without parsing the received image content, and a repackaging mode for restoring the processed image content and transmitting the restored image content to the other display device. 3. The method of claim 2,
Wherein the determining comprises:
Wherein the display device determines one of the bypass mode and the repackaging mode based on the arrangement order of the display devices. The method of claim 3,
Wherein the repackaging mode periodically operates in a predetermined arrangement order of the display device and the other display device. 3. The method of claim 2,
The processor comprising:
Determines the signal loss rate of the processed image content, and determines one of the bypass mode and the repackaging mode according to the signal loss rate. 6. The method of claim 5,
The processor comprising:
Determines the repackaging mode if the signal loss rate is equal to or greater than a preset value, and determines the bypass mode when the signal loss rate is less than a preset value. The method according to claim 1,
The processor comprising:
Wherein when the resolution of the received image content is the first resolution, the bandwidth is determined as a first bit rate (HBR1), and when the resolution of the received image content is the second resolution, And determines a bandwidth as a second bit rate (High Bit Rate 2, HBR2). The method according to claim 1,
Wherein the image input unit comprises:
And a display interface for transmitting the processed video content to another display, wherein the display interface includes a receive (Rx) terminal and a transmit (Tx) terminal. The method according to claim 1,
Wherein the display device and the other display device are included in a video wall displaying the processed image content. A method of controlling a display device,
Receiving image content from outside;
Determining a resolution of the received image content;
Determining a bandwidth for transmitting the received video content to another display device based on the determined resolution, and determining a processing mode for transmitting the received video content to the another display device; And
And transmitting the image content processed according to the determined processing mode to the other display device based on the determined bandwidth. 11. The method of claim 10,
An image processing step of processing the received image contents;
And displaying at least a portion of the processed image content,
The processing mode includes:
And a repackaging mode for passing the processed video content to the other display device without parsing and restoring the processed video content and transmitting the restored video content to the other display device. 11. The method of claim 10,
Wherein the determining comprises:
Wherein one of the bypass mode and the repackaging mode is determined based on the arrangement order of the display devices. 12. The display control method according to claim 11, wherein the repackaging mode periodically operates in a predetermined arrangement order of the display device and the other display device. 11. The method of claim 10,
Further comprising: determining a signal loss rate of the processed video content,
Wherein said determining the processing mode comprises:
Wherein one of the bypass mode and the repackaging mode is determined according to a signal loss rate of the processed image content. 15. The method of claim 14,
Wherein said determining the processing mode comprises:
Determines the repackaging mode when the signal loss rate is equal to or greater than a predetermined value, and determines the bypass mode when the signal loss rate is less than a predetermined value. 11. The method of claim 10,
The step of determining the bandwidth may comprise:
Wherein when the resolution of the received image content is a first resolution, the bandwidth is determined as a first bit rate (HBR1), and when the resolution of the received image content is a second resolution, And the bandwidth is determined as a second bit rate (High Bit Rate 2, HBR2). 11. The method of claim 10,
Wherein the receiving comprises:
Wherein the display interface receives the processed video content via a display interface for transmission to another display, the display interface including a receive (Rx) terminal and a transmit (Tx) terminal. 11. The method of claim 10,
Wherein the display device and the other display device are included in a video wall displaying the processed video content.

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