KR20120061619A - Display apparatus and a method for setting ID thereof - Google Patents

Display apparatus and a method for setting ID thereof Download PDF

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Publication number
KR20120061619A
KR20120061619A KR1020100122977A KR20100122977A KR20120061619A KR 20120061619 A KR20120061619 A KR 20120061619A KR 1020100122977 A KR1020100122977 A KR 1020100122977A KR 20100122977 A KR20100122977 A KR 20100122977A KR 20120061619 A KR20120061619 A KR 20120061619A
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KR
South Korea
Prior art keywords
delay time
video signal
value
display device
display
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KR1020100122977A
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Korean (ko)
Inventor
이광열
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엘지전자 주식회사
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Priority to KR1020100122977A priority Critical patent/KR20120061619A/en
Publication of KR20120061619A publication Critical patent/KR20120061619A/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/12—Synchronisation between the display unit and other units, e.g. other display units, video-disc players
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/04—Display device controller operating with a plurality of display units

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

PURPOSE: A display device and an identifier setting method thereof are provided to easily set up an identifier about a display device and to rapidly implement multi-vision. CONSTITUTION: A video signal outputting unit(220) outputs a video signal through a video signal output line. A data communication unit(260) obtains delay time from the display device according to the reception of the image signal. A controlling unit(270) confirms the delay time of the video signal received through the video signal outputting unit. The controlling unit sets up a system identifier.

Description

Display apparatus and a method for setting ID thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display apparatus, and more particularly, to a display apparatus and an identifier setting method thereof, which enable automatic setting of an identifier of a display apparatus constituting a multi vision system.

Today's consumers prefer to enlarge and slim display media, and thus, research on display equipment that can realize large screens with less space, such as liquid crystal display (LCD), plasma display panel (PDP), and projector (projector). Development is actively underway. In addition, there is a growing demand for display equipment that can realize ultra-large screens while occupying a small space in places where many people come and go, such as stadiums, performance halls, exhibition halls, and airports.

In order to cope with such a situation, multi-vision has already been implemented using equipment such as PDP, LCD, projector, and CRT, and has been widely applied to real life and product display.

A general multivision system is a system for enlarging or reducing a single image and outputting the image to a screen. The multivision system is connected to a plurality of image output means to form a multivision system, and simultaneously or selectively to a plurality of image output means. Is a system for outputting. Since the multi-vision system includes a plurality of display devices, an identifier (ID) for identifying each display device is set.

1 is a block diagram showing a conventional multi-vision system.

A computer (PC) 10 for outputting image signals (R / G / B, H / V), and a main control unit (MCU) 21 for receiving a video signal output from the computer 10 and driving the display. The configuration includes a plurality of display devices (Monitor) (20, 30, 40) each comprising a.

Here, the image signal line of the computer 10 is connected through a communication port (for example, RS-232C) and includes a color signal (R / G / B), a synchronization signal (H / V), and a status signal (Status). Is output. The image signal line is branched from the first display device 20 and supplied to the first and second display devices 20 and 30, and further branched from the second display device 20 to the second and third display devices ( 20 and 30 are supplied to the respective display devices.

Such a multi-vision system can be a video signal input source such as a DVD, VTR, STB, computer, etc. In the display apparatuses 20, 30, and 40, the multi-vision system corresponds to an identifier (ID) assignment and its arrangement state by display apparatus. The zoom area is set, the unit size of the zoom area is provided, and the image signal of the zoom area is converted and displayed according to its screen size.

Typically, the upper left is the highest priority, the lower right is the lowest priority according to the arrangement of the display device, and the priority is determined from the left to the right.

In the conventional multi-vision system, in order to assign an ID to each display device, a user must manually set the display device in the order of the system by system using a remote controller or an on-screen display (OSD). There is discomfort.

According to an embodiment of the present invention, it is possible to provide a display device and a method for setting the identifier thereof so that an identifier for each display device constituting the multivision can be easily set.

According to an exemplary embodiment of the present invention, a display apparatus includes: a video signal communication unit configured to receive a video signal through a video signal input line and to output the input video signal through a video signal output line; A data communication unit for obtaining a delay time of an image signal from at least one other display device configuring the multi-vision; And a controller configured to check a delay time of the video signal received through the video signal communication unit, and to set a system identifier by comparing the checked delay time with the delay time obtained through the data communication unit.

In addition, the identifier setting method of the display apparatus according to an embodiment of the present invention comprises the steps of obtaining a delay time of the video signal input to each display device constituting the multi-vision; And setting a system identifier corresponding to each of the display apparatuses using the obtained delay time.

According to an embodiment of the present invention, by automatically setting the identifier by the synchronization signal delay time rather than the complicated and inconvenient user operation in the implementation of multivision, it is possible to prevent the problem caused by the identifier missetting in advance. Therefore, it is effective to implement multivision easily and quickly.

1 is a block diagram showing a conventional multi-vision system.
2 is a block diagram of a multi-vision system according to an embodiment of the present invention.
3 is a block diagram of a display device according to an embodiment of the present invention.
4 is a diagram illustrating a measurement waveform of a synchronization signal according to an exemplary embodiment of the present invention.
5 is a flowchart illustrating a method for setting an identifier of a display apparatus according to a first embodiment of the present invention.
6 is a flowchart illustrating a method for setting an identifier of a display apparatus according to a second embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily made by adding, changing, or deleting other elements. I can suggest.

The term used in the present invention is selected as a general term widely used as possible at present, but in certain cases there is also a term arbitrarily selected by the applicant, in which case the meaning is described in detail in the description of the invention, the name of a simple term It should be clear that the present invention is to be understood as a meaning of terms.

2 is a block diagram of a multi-vision system according to an embodiment of the present invention.

Referring to FIG. 2, the plurality of display apparatuses 200a to 200d are installed in a matrix form of 2 * 2 grid, and receive and output image signals divided into 2 * 2, respectively, to implement multivision.

At this time, the display device is configured to 2 * 2 to implement the multi-vision, in the embodiment of the present invention, the number of installation of the display device can be increased or reduced it will be apparent to those skilled in the art to which the present invention belongs. will be.

In addition, the plurality of display apparatuses 200a to 200d operate by control data input through the remote controller 100 to change an output state or an operation state of an input video signal.

In this case, different access codes are assigned to the plurality of display apparatuses 200a to 200d, and a user sets the remote controller 100 as an access code corresponding to a specific display apparatus, and the plurality of display apparatuses 200a to 200d. 200d) may be controlled individually.

The operator server 300 is connected to a plurality of display apparatuses 200a to 200d, and controls the change of state of each display apparatus according to an operator's request.

The external device 400 transmits various video signals to a plurality of display apparatuses 200a to 200d through a set top box, a DVD player, a VCR, and the like. Here, it will be obvious that the external device 400 is simply a source for providing image signals to the plurality of display apparatuses 200a to 200d, and may be implemented as a STB (SetTop Box) other than the above means. .

In this case, the plurality of display apparatuses 200a to 200d are connected to each other through a data communication unit, thereby transferring the delay time according to the reception of their video signal to another display apparatus connected to the other, or other display apparatus connected to the same. Receive the delay time sent from.

In other words, the plurality of display apparatuses 200a to 200d share delay time information with each other, and use the shared delay time information to set their system identifiers when implementing multivision.

In general, any one of the plurality of display apparatuses receives an image signal through the external device 400. In addition, the display device receiving the video signal through the external device 400 transmits the received video signal to another display device neighboring. In addition, the display device receiving the video signal also transmits the video signal to another display device.

In this process, a time difference occurs in the video signal received through each display device, and after the predetermined delay time passes based on the display device receiving the video signal, the video signal is transmitted to the next display device.

That is, if an image signal transmitted through the external device 400 is received by the first display apparatus 200a, the first display apparatus 200a receives the image signal at a time. In this case, the a time may be referred to as a reference time without a delay.

In addition, the first display apparatus 200a transmits the received image signal to the second display apparatus 200b. In this case, the second display apparatus 200b transmits the image through the first display apparatus 200a. The video signal is received at a + b time, which is delayed by a certain time than a time at which the signal is received.

In addition, the second display apparatus 200b transmits the received image signal to the third display apparatus 200c, wherein the third display apparatus 200b transmits the image signal through the second display apparatus 200b. The video signal is received at a + b + b time which is delayed by a certain time more than the received a + b time.

Similarly, the fourth display apparatus 200d receives the video signal at a + b + b + b time.

As such, a difference occurs in the time when the video signal is received through each of the display apparatuses, and accordingly, each display apparatus sets its own system identifier according to a reception delay time of the video signal generated in the respective display apparatuses. .

Hereinafter, the system identifier setting operation will be described in detail with reference to the accompanying drawings.

3 is a block diagram of a display apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the display apparatus includes an image signal receiver 210, an image signal output unit 220, an image signal processor 230, a display module 240, a storage unit 250, a data communication unit 260, and a controller. And 270.

The video signal receiver 210 receives a video signal transmitted from the outside.

The video signal includes vertical and horizontal synchronization signals in addition to the actual video data.

In this case, the video signal receiver 210 may receive a video signal provided through the external device 400, or may receive a video signal transmitted from another neighboring display device.

The image signal output unit 220 branches the image signal received through the image signal receiver 210 and transmits the image signal to a neighboring display apparatus.

In this case, if the display device is the last display device of the multi-vision display device, a separate video signal will not be output from the video signal output unit 220.

The image signal processor 230 may process and display the image signal received through the image signal receiver 210.

In this case, the video signal processor 230 includes a video decoder for decoding the received video signal, and a scaler for converting the decoded video signal into a format that can be output. The scaler is a means including a zoom function, and enlarges only the video signal of an area corresponding to its position among the divided images to fit the size of the display unit 240 to be described later.

In addition, the image signal processor 230 includes an APL unit, and detects an average picture level (APL) value for each frame of the input image signal. The APL value represents an average luminance level of the input video signal, and performs signal processing on the input video signal using the APL value. For example, if the APL value of the input video signal is high, this means a bright image. Therefore, when processing the signal of the video signal, the luminance value is increased. If the APL value is low, it means a dark image, and thus the luminance value is decreased. Let's do it. Accordingly, a dark image may be processed darker and a bright image may be processed brighter, thereby maximizing a contrast ratio (CR).

The display unit 240 is a means for displaying an image signal processed through the image signal processor 230, which is a liquid crystal display (LCD), a plasma display panel (PDP), organic light emitting diodes (OLED), and an LED. It can be implemented with various display modules such as Light Emitting Diodes.

The storage unit 250 stores software related to the operation of the display apparatus and various data generated during the operation of the display apparatus.

The storage unit 250 may be embodied as an EEPROM (Electrically Erasable Programmable Read-Only Memory), and may be connected to the controller 270 which will be described later according to the I2C method.

The data communication unit 260 is a means for performing bidirectional communication with an external display device, which may be implemented as an I2C standard interface.

The data communication unit 260 transmits a delay time according to the reception of an image signal to another external display device or receives a delay time transmitted from another external display device according to a control signal of the controller 270 which will be described later.

The controller 270 controls the overall operation of the display apparatus 200.

In particular, the controller 270 compares the delay time according to the reception of the video signal with the delay time of the other display device received through the data communication unit 260 and sets a system identifier according to the comparison result.

That is, each display device constituting the multi-vision generates a predetermined delay time until the video signal is received in proportion to the order of receiving the video signal.

 4 is a diagram illustrating a measurement waveform of a synchronization signal according to an exemplary embodiment of the present invention.

Referring to FIG. 4, as shown in (a) waveform, a delay time does not occur in a display apparatus that receives an image signal first through an external device 400. In other words, the delay time of the first display device receiving the video signal is zero.

Next, as shown in (b) the second waveform, the display device receiving the video signal receives the video signal later than a display device receiving the first video signal. In other words, the delay time of the display device receiving the second video signal is 0 + x.

Next, as shown in (c) the third time, the display device receiving the video signal receives the video signal later than the display device receiving the first video signal. In other words, the delay time of the display device receiving the third video signal is 0 + 2x.

Next, as shown in (d) the fourth time, the display device receiving the video signal receives the video signal later than the display device receiving the first video signal. In other words, the delay time of the fourth display device receiving the video signal is 0 + 3x.

In this case, each time the display device implementing the multi-vision increases, the delay time is additionally delayed and transmitted.

For example, if the delay time is 1ms per set, the delay time of the first display device receiving the video signal is 0ms, the second delay time of the display device receiving the video signal is 1ms, and the third time the video signal. The delay time of the display device receiving the video signal is 2ms, and the delay time of the display device receiving the video signal is 3ms.

Accordingly, the controller 270 sets its system identifier using the obtained delay time.

First, the controller 270 may be configured according to the highest delay time among the acquired delay times, the lowest delay time, and the number of the acquired delay times, that is, the number of display devices implementing multivision. Set the system identifier.

That is, the controller 270 calculates a first value obtained by dividing the difference between the obtained maximum delay time and the minimum time by the number of display devices where the delay occurs, and calculates a delay time that occurs every set increase.

For example, if the number of display devices implementing multi-vision is 4 and a delay time difference of 60 ns occurs for each set, and the obtained delay time is 0, 60 ns, 120 ns, and 180 ns, the controller 270 The difference between the obtained maximum delay time of 180 ns and the minimum delay time 0 ns is a first value of 3 (the total number of display devices minus 1 since the display device located in front of the delay does not occur. Find 60 ns.

In addition, the controller 270 obtains a second value in which the obtained delay time of each display device is obtained as the obtained 1 value.

For example, the second value of the display device having the delay time 0 is 0, the second value of the display device having 60 ns is 1, the second value of the display device having 120 ns is 2, and 180 ns. The second value of the display device having a is 3.

Subsequently, the controller 270 sets a third value obtained by adding +1 to the second value obtained by each display apparatus as a system identifier of the display apparatus.

For example, the third value of the display device having the second value of 1 is 2, and accordingly, the system identifier of the display device is set to # 2.

In addition, the system identifier of the display device where the second value is obtained as 0 is # 1, the system identifier of the display device where the second value is obtained as 2 is # 3, and the system identifier of the display device at which the second value is 3 Is set to # 4.

In a second method, the controller 270 sorts the delay times of the obtained display devices in ascending order, and sets the rank to which the display device belongs as the system identifier.

For example, when the obtained delay times are 0, 60ns, 120ns, and 180ns, the first rank is 0, the second rank is 60ns, the third rank is 120ns, and the fourth rank is 180ns.

Accordingly, the system identifier of the display device having the delay time set to the first rank is set to # 1, the system identifier of the display device having the delay time set to the second rank is set to # 2, and the third rank The system identifier of the display device having the delay time set to is set to # 3, and the system identifier of the display device having the delay time set to the fourth rank is set to # 4.

As described above, the display apparatus according to the embodiment of the present invention automatically sets the identifier by the synchronization signal delay time instead of the complicated and inconvenient user operation when implementing multivision, thereby preventing the problem caused by the identifier missetting in advance. Not only can you do that, you can easily and quickly implement multivision.

5 is a flowchart illustrating a method of setting an identifier of a display apparatus according to a first embodiment of the present invention.

Referring to FIG. 5, the image signal receiver 210 receives an image signal transmitted from the outside (step 100).

In this case, the video signal may be transmitted through the external device 400, or may be transmitted through another display device adjacent to the video signal.

Subsequently, the controller 270 analyzes the waveform of the synchronization signal included in the received video signal and checks the delay time according to the reception of the video signal (step 110).

In addition, the controller 270 performs data communication with another display device through the data communication unit 260 to obtain a delay time confirmed by the other display device (step 120).

Accordingly, the controller 270 may acquire not only its own delay time but also the delay time of all display devices implementing the multivision.

Next, the controller 270 calculates a first value that is a difference between the highest highest delay time and the lowest lowest delay time in the acquired delay time (step 130).

Subsequently, the controller 270 calculates a second value obtained by dividing the calculated first value by the number of display apparatuses having the delay time among display apparatuses implementing the multi vision (step 140).

In this case, the display device in which the delay time occurs is the remaining display device except the display device located in front of the display device. Accordingly, the display device in which the delay time occurs is a value obtained by subtracting 1 from the total number of display devices implementing the multi-vision. Can be.

Subsequently, the controller 270 calculates a third value obtained by dividing the checked delay time, that is, the delay time generated by the display apparatus by the calculated two values (step 150).

In addition, the controller 270 calculates a fourth value obtained by adding 1 to the calculated third value (step 160), and sets the calculated fourth value as a system identifier corresponding to its display device (170). step).

6 is a flowchart illustrating a method of setting an identifier of a display apparatus according to a second embodiment of the present invention.

Referring to FIG. 6, the image signal receiver 210 receives an image signal transmitted from the outside (200).

In this case, the video signal may be transmitted through the external device 400, or may be transmitted through another display device adjacent to the video signal.

Subsequently, the controller 270 analyzes the waveform of the synchronization signal included in the received video signal and checks the delay time according to the reception of the video signal (step 210).

In addition, the controller 270 performs data communication with another display device through the data communication unit 260 to obtain a delay time confirmed by the other display device (step 220).

Accordingly, the controller 270 may acquire not only its own delay time but also the delay time of all display devices implementing the multivision.

Subsequently, the controller 270 sorts all the obtained delay times in descending order and ranks them in the sorting order (step 230). That is, the lowest delay time of the delay time is set as the first priority.

In addition, when the rank for each of the delay times is determined, the controller 270 checks the rank of the delay time corresponding to its own display device, and uses the checked rank as a system identifier for the own display device. Set (step 240).

As described above, according to the exemplary embodiment of the present invention, the identifier setting is automatically performed by the synchronization signal delay time instead of the complicated and inconvenient user operation in the implementation of multivision, thereby preventing the problem caused by the identifier missetting in advance. In addition, multi-vision can be implemented easily and quickly.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

210: video signal receiving unit 220: video signal output unit
230: image signal processor 240: display module
250: storage unit 260: data communication unit
270: control unit

Claims (10)

A video signal communication unit which receives a video signal through a video signal input line and outputs the input video signal through a video signal output line;
A data communication unit for obtaining a delay time according to a reception time of the video signal from at least one other display device configuring a multi-vision; And
And a controller configured to check a delay time of the video signal received through the video signal communication unit, and to set a system identifier by comparing the checked delay time with the delay time obtained through the data communication unit. The method of claim 1,
The reception delay time information is
And a delay time of a synchronization signal included in the video signal. The method of claim 1,
And the controller is configured to set the system identifier by using the number of display devices having a delay, the highest delay time and the lowest delay time of the plurality of delay times. The method of claim 3, wherein
The controller obtains a first value by dividing a difference value between the highest delay time and the lowest time by the number of display apparatuses where the delay occurs,
Dividing the identified delay time by the obtained first value to obtain a second value,
And a value obtained by adding 1 to the obtained second value as the system identifier. The method of claim 1,
And the control unit sets the system identifier in order of the confirmed delay time and the obtained delay time. Acquiring a delay time of an image signal input to each display apparatus constituting the multivision; And
And setting a system identifier corresponding to each of the display apparatuses using the obtained delay time. The method according to claim 6,
Acquiring the delay time
And obtaining a delay time of a synchronization signal included in the video signal. The method according to claim 6,
The setting of the system identifier
And setting the maximum delay time and the minimum delay time determined from the obtained delay time, and the number of display apparatuses having the delay. The method of claim 8,
The setting step
Obtaining a first value which is a difference value between a maximum delay time and a minimum delay time from the obtained delay time;
Obtaining a second value obtained by dividing the first value by a display device having the delay;
Obtaining a third value obtained by dividing a delay time generated by each display apparatus by the second value;
And setting a fourth value obtained by adding 1 to the obtained third value as a system identifier of each display device. The method according to claim 6,
The setting of the system identifier
Setting the system identifier in descending order of the obtained delay time.
KR1020100122977A 2010-12-03 2010-12-03 Display apparatus and a method for setting ID thereof KR20120061619A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016089004A1 (en) * 2014-12-04 2016-06-09 Lg Electronics Inc. Video wall system
KR20220126534A (en) * 2021-03-09 2022-09-16 주식회사 케이티 Device for outputting content and delay compensation method of content output device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016089004A1 (en) * 2014-12-04 2016-06-09 Lg Electronics Inc. Video wall system
US10095460B2 (en) 2014-12-04 2018-10-09 Lg Electronics Inc. Video wall system
KR20220126534A (en) * 2021-03-09 2022-09-16 주식회사 케이티 Device for outputting content and delay compensation method of content output device

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