KR20110051946A - Multi vision, multi vision materialization method and display device for the same - Google Patents

Abstract

PURPOSE: A multi vision of a display device and a method for implementing the same are provided to synchronize the display quality of a plurality of display devices which composing the multi vision. CONSTITUTION: A method for implementing a multi vision of a display device comprises steps of: transferring a first display quality value from a first display device to a second display device(S100); transferring a second display quality value from the second display device to the first display device(S120); determining a third display quality value for applying to the first and the second display device using the first and the second display values(S140); and displaying an image on the first and the second display devices using the determined third display quality value(S150).

Description

Multi vision, multi vision materialization method and display device for the same}

The present invention relates to a display apparatus, and more particularly, to a method for sharing image quality-related data in a multi vision system, and a display apparatus and a display system using the same.

MPEG technology, the standard for compressing video data, is applied to almost all fields such as computers, broadcasting, home appliances, and telecommunications, enabling the implementation of various video and audio services, and the emergence of various digital devices to receive the above services. Brought about.

In particular, the display device occupies an important place in the daily life as an easy and effective information transmission medium. Digital video technology compresses and transmits video data and audio data using MPEG technology, so that more broadcasts can be recorded at home with clear picture quality and vivid sound. It was easy to appreciate.

In addition, as the display device is enlarged, the display device may be installed in a public place and used for advertisement or propaganda, but there is a limit in the screen size to be used as an outdoor display device.

Therefore, in the related art, a technology for multivision forming one large screen through a plurality of display apparatuses has been proposed.

The multi-vision system includes a plurality of display apparatuses, a distributor of video signals to be provided to the plurality of display apparatuses, a video signal input source for providing the video signals, and a controller for controlling the plurality of display apparatuses.

And the screen implementation operation of the multi-vision, the operator having the expertise related to the operation of the control device controls the distributor so that the video signal supplied from the video signal input source is properly distributed to the display device of each position and Accordingly, each display device displays an image signal supplied thereto.

However, the multi-vision system according to the related art merely displays an input video signal, thereby compensating for the image quality of the image displayed on each display device according to the difference in characteristics of each display panel constituting the multi-vision system. Find ways to do it.

According to an embodiment of the present invention, a method of sharing image quality-related data for matching image quality of images output from a plurality of display apparatuses constituting a multi-vision system, and a display apparatus and a display system using the same may be provided.

The technical problems to be achieved in the proposed embodiment are not limited to the technical problems mentioned above, and other technical problems not mentioned above are clear to those skilled in the art to which the proposed embodiments belong from the following description. Can be understood.

According to an aspect of the present invention, there is provided a method of implementing a multi-vision, including: transmitting a first image quality value from a first display apparatus to a second display apparatus; Transmitting a second image quality value from the second display apparatus to the first display apparatus; Determining a third image quality value to be applied to the first and second display apparatuses using the first and second image quality values; And displaying an image on the first display device and the second display device based on the determined third picture quality value, wherein the third picture quality values applied to the first and second display devices are the same. It is characterized by.

Display system according to an embodiment of the present invention comprises an image signal supply unit for providing an image signal; And a plurality of display apparatuses for receiving and displaying image signals provided through the image signal supply unit, wherein each of the plurality of display apparatuses calculates an image quality value of the provided image signal, respectively. It is characterized by setting the quality value to be finally applied by sharing the quality value calculated in each other.

According to an exemplary embodiment of the present invention, a display apparatus includes: a video signal receiver configured to receive a video signal provided from an external device; An APL unit analyzing the received video signal to obtain an average picture level (APL) value; And a controller configured to receive an APL value transmitted from at least one external display device and to compensate for the obtained APL value by using the received APL value and the APL value obtained from the APL unit.

According to an embodiment of the present invention, by matching the state of the image output from each display device in an environment implementing a multi-vision using a plurality of display devices, by implementing a multi-vision of more optimal picture quality to improve user satisfaction It can be effected.

The proposed embodiment will be described.

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 inventions which are further deteriorated by addition, change, deletion, etc. of other components, or other embodiments included within the scope of the present invention can be easily made. I can suggest.

The term used in the present invention was selected as a general term widely used as possible, but in some cases, the term is 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.

In other words, in the following description, the word 'comprising' does not exclude the presence of other elements or steps than those listed.

1 is a diagram illustrating a configuration of a display system according to an exemplary embodiment of the present invention.

Referring to FIG. 1, which shows a configuration diagram of a display system according to an exemplary embodiment of the present invention, a plurality of display apparatuses 200a to 200d are installed in a matrix of 2 * 2 grid shape and divided into 2 * 2. Multivision is realized by receiving and outputting video signals.

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 interconnected through the communication terminal 250, thereby transmitting their image quality related data to another display apparatus connected to them or from another display apparatus connected to them. Receive data quality related data. The plurality of display apparatuses 200a to 200d share the quality related data with each other.

In general, the same image is displayed on the plurality of display apparatuses 200a to 200d. For example, when the multi-vision is configured as 2 * 2, the video signal input through the external device 400 is divided into four regions uniformly, and thus the plurality of display apparatuses 200a to 200d. ) Displays an image of each of the divided four areas corresponding to its installation position.

In this case, the image quality of the images displayed on the plurality of display apparatuses 200a to 200d should be maintained in the same state. However, the plurality of display apparatuses 200a may vary due to the quality setting state of each display apparatus or a deviation of the display module. A difference occurs in the image quality of the image displayed through ˜200d).

Accordingly, in the embodiment of the present invention, as described above, the plurality of display apparatuses 200a to 200d communicate with each other to share data related to image quality.

2 is a diagram illustrating a configuration of a display apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 2, which shows a block diagram according to an embodiment of the present disclosure, the display apparatus 200 includes a receiver 210, an image signal processor 220, a display 230, a storage 240, and a communication terminal. It comprises a 250 and the control unit 260.

The receiver 210 receives an image signal and control data. That is, the receiver 210 receives a video signal provided from the external device 400 or receives control data provided from the operator server 300.

The image signal processor 220 processes the signal to display the image signal received through the receiver 210.

In this case, the video signal processing unit 220 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 230 to be described later.

In addition, the image signal processor 220 includes an APL unit to detect 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. Turn on. Accordingly, a dark image may be processed darker and a bright image may be processed brighter, thereby maximizing a contrast ratio (CR).

The display 230 is a means for displaying an image signal processed through the image signal processor 220, 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 240 stores software related to the operation of the display apparatus 200 and various data generated during the operation of the display apparatus 200.

The storage unit 240 may be embodied as an EEPROM (Electrically Erasable Programmable Read-Only Memory), and may be connected to the controller 260 which will be described later according to the I2C method.

The communication terminal 250 is a means for performing bidirectional communication with an external display device, which may be implemented as an I2C standard interface.

The communication terminal 250 transmits image quality related data to another external display apparatus or receives image quality related data transmitted from another external display apparatus according to a control signal of the controller 260 which will be described later.

The controller 260 controls the overall operation of the display apparatus 200.

In particular, the controller 260 transmits the image quality related data of the display apparatus to another external display apparatus connected thereto or controls to receive the image quality related data transmitted from the other external display apparatus, and accordingly the reception The final image quality related data to be applied to display the received video signal is determined using the image quality related data and its own image quality related data.

In this case, the image quality-related data typically includes an APL (Average Picture Level) value, and also includes image quality setting data such as contrast, brightness, sharpness, and the like.

In addition, the controller 260 transmits the APL value calculated by the image signal processor 220 to an external display device and receives the APL value transmitted from the external display device. The controller 260 determines the final APL value to be applied using the received APL value and the calculated APL value.

In addition, the controller 260 transmits preset contrast, brightness, and sharpness values to an external display device, and transmits contrast and brightness values transmitted from an external display device. Brightness, Sharpness values are received. The final value to be applied to the corresponding display device is determined using the received value and the preset value.

3 is a diagram for describing a communication process of a display system.

Referring to FIG. 3, the display system according to the present invention includes a plurality of display apparatuses 200a to 200d, and the plurality of display apparatuses 200a to 200d are connected to each other.

That is, the first display apparatus 200a is connected to the second, third, and fourth display apparatuses 200b, 200c, and 200d, and accordingly, the first display apparatus 200a receives the image quality related data corresponding to the first display apparatus 200a. 4 Transmit to display.

In addition, likewise, the second display apparatus 200b is connected to the first, third and fourth display apparatuses 200a, 200c, and 200d, and accordingly, the second display apparatus 200b receives the image quality related data corresponding to the second display apparatus 200b. Transfer to 3 and 4 display devices.

In addition, likewise, the third display apparatus 200c is connected to the first, second and fourth display apparatuses 200a, 200b, and 200d, and thus the first and second display apparatuses 200c, 200b, and 200d are connected to the first and second display apparatuses 200c, 200b, and 200d. Transmit to 2 and 4 display devices.

In addition, likewise, the fourth display apparatus 200d is connected to the first, second and third display apparatuses 200a, 200b, and 200c, and thus the first and second display apparatuses 200d, 200d, and 200c are connected to the first and second display apparatuses 200d, 200b, and 200c. Send to 2 and 3 display devices.

Accordingly, the plurality of display apparatuses can share the quality related data with each other.

4 is a diagram for describing a final image quality value setting process according to a first embodiment of the present invention.

Referring to FIG. 4, the APL value calculated by the first display apparatus is 100, the APL value calculated by the second display apparatus is 80, the APL value calculated by the third display apparatus is 70, and the fourth display apparatus. It can be seen that the calculated APL value is 120.

The APL values calculated as described above are shared through bidirectional communication with each other, and finally the APL values to be applied to the first, second, third and fourth display apparatuses are determined using the shared APL values.

That is, when the condition for determining the APL value is the maximum value, 120 of the shared APL values are the largest, so that the first, second, third, and fourth display apparatuses receive the input image signal using the maximum value 120. Will be displayed. In other words, although the APL values calculated by the respective display apparatuses are different from each other, the same APL values are unified by sharing the APL values as described above.

In addition, when the determination condition of the APL value is the minimum value, 70 of the shared APL values are the smallest, so that the first, second, third, and fourth display devices display the input image signal using the minimum value of 70. do.

In addition, when the determination condition of the APL value is an average value, since the average value of the shared APL value is about 90, the first, second, third and fourth display devices display the input image signal using the average value 90. Done.

In addition, any one display device may be set as the reference display device, and the APL values of all the display devices may be unified with the APL value calculated by the reference display device.

For example, when the first display apparatus 200a is set as the reference display apparatus, the first display apparatus 200a maintains the calculated APL value and the second, third and fourth display apparatuses 200b and 200c. , 200d) displays the input image signal using the APL value calculated by the first display apparatus.

5 is a diagram for describing a final image quality value setting process according to a second embodiment of the present invention.

Referring to FIG. 5, the contrast value set in the first display device is 70, the contrast value set in the second display device is 75, the contrast value set in the third display device is 60, and the contrast value set in the fourth display device. It can be seen that is 90.

As described above, contrast values set in each display apparatus are shared through bidirectional communication, and a final contrast value applied to the first, second, third, and fourth display apparatuses is finally determined using the shared contrast values. do.

That is, when the condition for determining the contrast value is the maximum value, the contrast values of all the display devices are unified with the contrast values set in the fourth display device.

In addition, when the determination condition of the contrast value is a minimum value, the contrast values of all the display devices are unified with the contrast values set in the third display device.

In addition, when the determination condition of the contrast value is an average value, since the average value of the shared contrast value is about 73, the contrast values of all display devices are unified to the average value.

In addition, when the first display apparatus is set as the reference display apparatus, the contrast values of all the display apparatuses are unified with the contrast values set in the first display apparatus.

As described above, according to an exemplary embodiment of the present invention, image quality-related data corresponding to a plurality of display apparatuses may be shared with each other to unify image quality-related data applied to each display apparatus, thereby displaying an image with more optimal image quality. You can do it.

On the other hand, in order to synchronize the video signal, there is a vertical synchronization signal and a horizontal synchronization signal. The horizontal synchronization signal is a synchronization signal for one scan line on the horizontal axis, and the vertical synchronization signal is a synchronization signal for one screen.

Therefore, in order to consistently synchronize the images output to the respective display apparatuses, the image quality-related data is shared with each other by using a vertical synchronization signal which is a synchronization signal of one screen, and thus related to the shared image quality. The data is used to determine the data related to the quality to be finally applied.

That is, since the APL value is changed from frame to frame, the APL value is calculated at the end of the vertical synchronization signal indicating the end of one frame. Accordingly, when the calculation of the APL value is completed, the calculated APL value is calculated. Enable sharing with each other.

As described above, according to an exemplary embodiment of the present invention, a multi-vision having a more optimal image quality is realized by matching a state of an image output from each display apparatus in a multi-vision environment using a plurality of display apparatuses. Satisfaction can be improved.

6 is a flowchart for explaining a multi-vision method of implementing a display apparatus according to a first embodiment of the present invention step by step.

Referring to FIG. 6, first, the receiver 210 receives an image signal provided from an external device 400 (step 100). The video signal includes a vertical synchronization signal and a horizontal synchronization signal.

When the image signal is received, the image signal processor 220 analyzes the received image signal, calculates an average luminance level APL of the corresponding frame, and transfers the calculated average luminance level to the controller 260. (Step 110).

When the average luminance level is transferred, the controller 260 transmits the calculated average luminance level to the external display device through the communication terminal 250 (step 120). The external display device refers to a device connected to the display device through the communication terminal 250 to implement a multi-vision together.

If the average brightness level is transmitted to the outside, the controller 260 determines whether the average brightness level calculated by the external display device is received from the external display device (step 130). That is, the controller 160 determines whether an average brightness level transmitted from the external display device is received through the communication terminal 250.

In response to the determination, if the average luminance level transmitted from the external display device is received, the controller 260 finally receives the received image signal using the received average luminance level and the calculated average luminance level. In operation 140, the average luminance level to be applied is determined. That is, the controller 160 determines a predetermined average luminance level determination condition and determines the average luminance level to be finally applied based on the determined condition. Here, the conditions include a maximum value, a minimum value, an average value, a value calculated by the reference display device, and the like.

If the average luminance level to be finally applied is determined, the controller 260 applies the determined average luminance level and controls the received image signal to be displayed (step 150).

Subsequently, the controller 260 analyzes a vertical synchronization signal included in the received video signal and checks an end point of the vertical synchronization signal, that is, a time point at which an image (one frame) of one screen ends (step 160). .

The control unit 260 returns to the step 110 at the end of the vertical synchronization signal to recalculate the APL value for the currently input frame.

In addition, the controller 260 determines whether a power off command is input from the outside, and blocks the power supply when the power off command is input (step 170).

7 is a flowchart illustrating a method of implementing a multi vision of a display apparatus according to a second embodiment of the present invention step by step.

Referring to FIG. 7, first, the controller 260 checks a preset image quality value (step 200). Here, a brightness value, a contrast value, a sharpness value, and the like exist in the image quality value, and the preset image quality value is stored in the storage unit 240.

When the quality value is confirmed, the controller 260 transmits the checked quality value to the external display device through the communication terminal 250 (step 210). That is, the image quality value set in the display device is shared with the external display device.

In addition, the controller 260 determines whether an image quality value transmitted from the external display device is received through the communication terminal 250 (operation 220).

If the image quality value is received, the controller 260 determines the final image quality value to be applied to the corresponding display device by using the received image quality value and the preset image quality value (step 230). That is, the controller 260 applies the highest value among the image quality values as the final image quality value, applies the lowest value as the final image quality value, applies the average value as the final image quality value, or sets the image quality value set in the reference display device. Is applied as the final image quality value.

In addition, the controller 260 changes a preset image quality value to the last applied image quality value (step 240).

As described above, according to the exemplary embodiment of the present invention, in a multi-vision implementation environment using a plurality of display apparatuses, the state of the image output from each display apparatus is matched, thereby realizing multi-vision with more optimal image quality and user satisfaction. Can improve.

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.

1 is a block diagram of a display system according to an exemplary embodiment of the present invention.

2 is a view showing the configuration of a display device according to an embodiment of the present invention.

3 is a view for explaining a communication process of the display system.

4 is a view for explaining a final image quality value setting process according to a first embodiment of the present invention.

5 is a view for explaining a final image quality value setting process according to a second embodiment of the present invention.

FIG. 6 is a flowchart for explaining a multi-vision implementing method of a display apparatus according to a first embodiment of the present invention step by step; FIG.

7 is a flowchart illustrating a method of implementing a multi vision of a display apparatus according to a second embodiment of the present invention step by step.

Claims (14)

Transmitting a first picture quality value from the first display device to the second display device; Transmitting a second image quality value from the second display apparatus to the first display apparatus; Determining a third image quality value to be applied to the first and second display apparatuses using the first and second image quality values; And, And displaying an image through the first display device and the second display device by applying the determined third image quality value. And a third image quality value applied to the first and second display devices. The method of claim 1, The first image quality value is an average picture level (APL) value for the input image signal calculated by the first display apparatus. And the second image quality value is an average picture level (APL) value for the input image signal calculated by the second display apparatus. The method of claim 1, The first image quality value is at least one of contrast, brightness, and sharpness preset in the first display device. And the second quality value is at least one of contrast, brightness, and sharpness preset in the second display device. The method of claim 1, The third image quality value may be any one of a maximum value, a minimum value, and an average value of the first image quality value and the second image quality value. The method of claim 1, Any one of the first and second display devices is set as the reference display device, And the third quality value is an image quality value calculated by a reference display device. The method of claim 1, And the first quality value and the second quality value are transmitted at the end of the vertical synchronization signal. A video signal supply unit for providing a video signal; And, It is composed of a plurality of display devices for receiving and displaying the video signal provided through the video signal supply unit, And the plurality of display apparatuses calculate an image quality value of the provided video signal, and share the image quality values calculated by the display apparatuses with each other to set the image quality value to be finally applied. The method of claim 7, wherein The image quality value is an APL (Average Picture Level) value. The method of claim 7, wherein And display quality values applied to the plurality of display apparatuses are the same. The method of claim 9, And the final image quality value to be applied is any one of a maximum value, a minimum value, and an average value of the shared image quality value. The method of claim 7, wherein And the plurality of display devices are in the form of a matrix consisting of a predetermined number of rows / columns. A video signal receiver for receiving a video signal provided from the outside; An APL unit analyzing the received video signal to obtain an average picture level (APL) value; And, A control unit configured to receive an APL value transmitted from at least one external display device, and to compensate for the obtained APL value by using the received APL value and the APL value obtained from the APL unit. Device. The method of claim 12, And the controller is configured to compensate the obtained APL value with at least one of the maximum, minimum, and average values of the received APL value and the obtained APL value. The method of claim 12, And the control unit transmits the obtained APL value to the at least one external display device.

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