KR20120050745A - Multi-vision system and picture visualizing method the same - Google Patents

Abstract

PURPOSE: A multi-vision system and screen realization method thereof are provided to improve the satisfaction of a user by minimizing a color difference between images respectively displayed by display apparatuses. CONSTITUTION: An external apparatus provides a full white pattern image to plural display apparatuses(S110). The display apparatuses displays the full white pattern image(S120). A user confirms a color difference between images respectively displayed by the display apparatuses(S130). The user decides a display apparatus which includes the best color sense difference in the color differences as a standard display apparatus(S140).

Description

Multi-vision system and picture visualizing method the same}

The present invention relates to a multi-vision system, and more particularly, to a multi-vision system and a screen realization method capable of minimizing color difference caused by the difference of each display panel constituting the multi-vision system.

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.

An embodiment of the present invention provides a multi-vision system and a screen realization method thereof capable of compensating and minimizing color difference generated in each display device constituting the multi-vision system.

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.

In accordance with another aspect of the present invention, there is provided a screen implementation method of a multivision system that implements multivision using a plurality of display apparatuses, wherein an image of a specific pattern is displayed on the plurality of display apparatuses. step; Determining a first display device to be a reference of image quality adjustment among the plurality of display devices by using the displayed image; And adjusting the image quality of the other second display apparatus using the determined first display apparatus.

In addition, the multi-vision system according to an embodiment of the present invention includes a video signal supply unit for supplying a video signal; A plurality of display apparatuses for receiving and displaying a video signal supplied through the video signal supply unit; And an image quality adjusting unit configured to determine a first display apparatus as a reference for image quality adjustment among the plurality of display apparatuses, and to adjust the image quality state of the other second display apparatuses based on the determined image quality state of the first display apparatus. do.

According to an embodiment of the present invention, by minimizing the color difference of the image output from each display device in an environment implementing a multi-vision using a plurality of display devices, it is possible to implement a multi-vision of more optimal image quality user satisfaction Can improve.

1 is a diagram showing the configuration of a multi-vision system according to an 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 diagram illustrating a display screen divided into a plurality of areas according to an exemplary embodiment of the present invention.
4 to 7 are flowcharts for explaining step-by-step implementation method of the multi-vision system according to an embodiment of the present invention.

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 multivision system according to an exemplary embodiment of the present invention.

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

In this case, the display device is configured to be 2 * 2 to implement the multi-vision, but this is only one embodiment, it is apparent to those skilled in the art that the number of installation of the display device can be increased or reduced. would.

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 image quality adjusting unit 300 is connected to the plurality of display apparatuses 200a to 200d to control the state change of each display apparatus. More specifically, the image quality control unit 300 is the same color in each display device (200a ~ 200d) so that the color difference of the image displayed on each display device (200a ~ 200d) does not occur, that is, The picture quality of the plurality of display apparatuses 200a to 200d is adjusted to display an image.

The external device 400 transmits various video signals to the 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 communication terminal, and thus transmit their own image quality adjustment values or receive image quality adjustment values transmitted from the outside.

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 corresponding to its installation position among the divided four images.

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 color of the image displayed through ˜200d).

Accordingly, the image quality adjusting unit 300 determines one specific display device among the plurality of display apparatuses 200a to 200d as a reference display device, and accordingly, the other image using the determined image quality setting state of the reference display device. Allows you to change the quality settings of other display devices. The image quality setting state may include a white balance state, a contrast setting state, a brightness setting state, a sharpness setting state, and the like, but a method of setting white balance will be described.

According to an exemplary embodiment of the present invention, the image quality adjusting unit 300 adjusts the white balance setting states of the plurality of display apparatuses 200a to 200d in the same manner, and displays the same through the display apparatuses 200a to 200d. The color difference of the image to be avoided does not occur.

To this end, the image quality adjusting unit 300 determines any one specific display apparatus as a reference among the plurality of display apparatuses 200a to 200d.

Here, the determined display device is a display device having the best overall color difference among the plurality of display devices 200a to 200d. The display device having the best color difference can be identified using Reddish, Greenish and Blueish.

To this end, the image quality adjusting unit 300 is to provide an image of a full white pattern to each display device (200a ~ 200d).

Accordingly, the external device 400 for supplying the video signal supplies a video signal having a full white pattern to the plurality of display devices 200a to 200d, and in each of the display devices 200a to 200d, the supplied full signal is provided. Receives and displays a video signal of white pattern.

In addition, the user checks the image signal of the full white pattern displayed through each of the display apparatuses 200a to 200d, and selects one of the display apparatuses as a reference for adjusting the white balance.

Hereinafter, the image quality adjusting operation will be described on the assumption that the reference display device is set as the first display device 200a.

In addition, in the above, the user directly selects the display device that is used as the reference for adjusting the white balance, but this is only an embodiment, and the white balance state is detected by sensing an image signal of a full white pattern displayed through the display device. You could use a sensor to check.

As described above, when the reference display apparatus is determined, the image quality adjusting unit 300 sets the white balance of the other display apparatuses using the determined white balance setting value of the first display apparatus 200a.

That is, in the first step, the image quality adjusting unit 300 extracts the white balance setting value applied to the first display apparatus 200a, and uses the extracted white balance setting values as the other display apparatuses 200b, 200c, and 200d. To send.

Then, the display apparatuses 200b, 200c, and 200d receiving the white balance setting value store the transmitted white balance setting value and, accordingly, display the image signal by applying the stored white balance setting value.

That is, in general, the white balance is adjusted for each color temperature, which is adjusted by changing the Red Offset, Green Offset, and Blue Offset values.

However, in general, the white balance adjustment is performed by setting a certain error range to the offset value in order to reduce the linetec time.

In this case, a difference occurs in an error range set in each display device, and accordingly, a difference occurs in a white balance setting value applied to each display device, and thus the white of each display device configuring the multi vision is generated. Deviation occurs in the balance setting state.

Therefore, in the embodiment according to the present invention, the white balance setting values of the other display devices are set to be the same as the determined white balance setting values of the reference display device, thereby minimizing the difference in color of the image displayed on each display device. do.

In addition, if a color difference occurs even after the first step is performed, the image quality adjusting unit 300 uses the average value of the plurality of white balance setting values stored in the first display apparatus 200a to display the other display apparatus. Set the white balance. Here, whether or not the color difference occurs may be determined by the user.

That is, in the second step, the image quality adjusting unit 300 extracts a plurality of white balance setting values stored in the first display apparatus 200a, calculates an average value of the extracted plurality of white balance setting values, and calculates the calculated values. The average value is transmitted to the other display devices 200b, 200c, and 200d.

Here, one of the plurality of white balance setting values stored in the first display apparatus 200a is a white balance setting value stored by the display module manufacturer, and the other is a white balance setting value stored by the display apparatus manufacturer. .

That is, a display device manufacturer generally manufactures a final finished product using a display module manufactured by a separate manufacturer. In this case, the display module manufacturer adjusts the white balance according to the characteristics of the module and stores the white balance setting value in the memory provided in the module. In addition, when manufacturing the finished product, the display apparatus manufacturer resets the white balance setting value suitable for the display module and stores it in another memory. Accordingly, a plurality of memories exist in the final display device, and the white balance setting values stored by the display module manufacturer and the white balance setting values stored by the display device manufacturer are stored in the plurality of memories.

Therefore, the image quality adjusting unit 300 takes the error range into the white balance setting value of the first display apparatus 200a, and displays the other display using the average value of the plurality of white balance setting values respectively stored in the plurality of memories. Set the white balance setting value of the device.

In addition, in the above, the white balance setting values of the other display apparatuses 200b, 200c, and 200d are set by using average values of only a plurality of white balance setting values stored in the first display apparatus 200a. The white balance setting values previously stored in the other display devices 200b, 200c, and 200d may be included.

For example, the first display apparatus may be configured by using an average of a plurality of white balance setting values stored in the first display apparatus 200a and a plurality of white balance setting values stored in the second display apparatus 200b. 2 The white balance setting value of the display apparatus 200b may be set.

In addition, if a color difference occurs even after the second step is performed, the image quality adjusting unit 300 may display the screen of the first display apparatus 200a on the other display apparatuses 200b, 200c, and 200d. Then, the white balance setting values of the other display devices 200b, 200c, and 200d are set through the displayed first display device 200a.

That is, in the third step, the image quality adjusting unit 300 divides the screen of the second display apparatus 200b into a plurality of regions. In this case, the divided regions may be set to two, four, six, and the like.

The image quality adjusting unit 300 transmits the screen of the first display apparatus 200a to the second display apparatus 200b, and accordingly transmits the first display to at least one of the divided regions. The screen of the device 200a is displayed.

Accordingly, the second display apparatus 200b displays the screen of the first display apparatus 200a in at least one of the divided regions, and displays its screen in the other regions.

In addition, the user may adjust the screen state of the second display apparatus 200b in the same manner as the screen state of the first display apparatus 200a while viewing a plurality of screens displayed through the divided area.

In this case, when the screen state of the user is adjusted, the screen of the first display apparatus 200a displayed through the divided area is maintained in its original state, and only the screen of the second display apparatus 200b is the screen state. It will change as you adjust.

In addition, when the screen of the second display apparatus 200b is adjusted to be the same as the screen of the first display apparatus 200a, the second display apparatus 200b stores the adjusted white balance setting value and accordingly, The input image signal is displayed by applying the stored white balance setting value.

As described above, in the present invention, the white balance adjustment for the plurality of display apparatuses is performed in three steps.

In addition, although the above three steps are performed sequentially to perform the white balance adjustment, this is only an embodiment. That is, the white balance adjustment may be performed by applying only the second step. In addition, the third step may be applied first, and accordingly, the second step and the first step may be sequentially applied. In addition, white balance adjustment may be performed by applying only one specific step of the three steps.

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

2, the display apparatus 200 includes a receiver 210, an image signal processor 220, a display 230, a first memory 240, a second memory 250, and a communication terminal 260. ) And the control unit 270.

The receiver 210 receives an image signal and control data. That is, the receiver 210 receives an image signal provided from the external device 400 or receives image quality adjustment data provided from the image quality adjuster 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 first memory 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. In addition, the first memory unit 240 stores the white balance setting values stored by the display apparatus manufacturer.

The second memory unit 240 stores display module related information stored by the display module manufacturer. In particular, the white memory setting value stored by the display module manufacturer is stored in the second memory unit 240.

The first memory unit 240 and the second memory unit 240 and 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 communication terminal 260 is a means for performing bidirectional communication with an external display device, which may be implemented as an I2C standard interface.

The communication terminal 260 transmits or receives image quality related data by performing data communication with the image quality adjusting unit 300 according to a control signal of the controller 260 which will be described later.

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

Hereinafter, the operation of the controller 270 when the display apparatus 200 is determined as the reference display apparatus will be described.

The controller 270 transmits the white balance setting value previously stored in the first memory unit 240, that is, the currently applied value, to the image quality control unit 300 according to a request of the image quality control unit 300.

In addition, the controller 270 transmits the white balance setting value stored in the first memory unit 240 and the white balance setting value stored in the second memory unit 250 to the image quality adjusting unit 300.

In addition, the controller 270 transmits the screen displayed through the display 230 to the image quality adjusting unit 300.

Accordingly, the controller 270 changes the image quality setting state of the other display device to match the image quality setting state of the display device.

In addition, the operation of the controller 270 when the display apparatus 200 is not determined as the reference display apparatus will be described.

When a specific image quality setting value is transmitted through the image quality adjusting unit 300, the controller 270 stores the transmitted image quality setting value in the first memory unit 240, and accordingly stores the stored image quality setting value. To adjust the white balance. In this case, the transmitted image quality setting value may be an image quality setting value applied to the reference display apparatus or may be an average value of a plurality of image quality setting values.

In addition, the controller 270 divides the screen of the display 230 into a plurality of areas. The controller 270 simultaneously displays the screen of the reference display device and its own screen on the divided display unit 230 so that a white balance setting value is set by the user.

That is, referring to FIG. 3, the controller 270 displays the screen of the display 230 in the first area 231, the second area 232, the third area 233, and the fourth area 234. Divide into

The controller 270 displays the image that was originally displayed in the second area 232 and the third area 233 as it is, and the reference display device in the first area 231 and the fourth area 234. To display the screen. That is, the controller 270 displays the original image and the image of the reference display device in a zigzag, so that image comparison can be easily performed.

4 to 7 are flowcharts illustrating step-by-step methods of implementing a screen of a multivision system according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the external device 400 provides an image having a full white pattern to the plurality of display apparatuses 200a, 200b, 200c, and 200d (step 110).

The plurality of display apparatuses 200a, 200b, 200c, and 200d receive an image of a full white pattern provided through the external device 400, and accordingly display the received image (step 120).

Subsequently, the user checks the image of the full white pattern displayed through the plurality of display apparatuses 200a, 200b, 200c, and 200d to check the color difference of the image displayed on each display apparatus (step 130). In another embodiment, a sensor (not shown) checks a white balance state of an image displayed through the plurality of display apparatuses 200a, 200b, 200c, and 200d.

In operation 140, the user determines the display device having the best color difference as the reference display device by using the identified color difference. In another embodiment, the sensor determines the display device displaying the image closest to the full white state as the reference display device according to the identified white balance state.

When the reference display device is determined as described above, the white balance adjustment process is performed.

Referring to FIG. 5, in the screen realization method of the multi-vision system according to the first exemplary embodiment, the image quality adjusting unit 300 extracts a white balance setting value applied to the first display apparatus determined as the reference display apparatus (step 210).

In addition, the image quality adjusting unit 300 transmits the extracted white balance setting values to the other display apparatuses, in step 220.

Subsequently, the other remaining display apparatus stores the white balance setting value transmitted through the image quality adjusting unit 300, and accordingly displays the image signal input from the outside by applying the stored white balance setting value ( Step 230).

In addition, referring to FIG. 6, in the screen realization method of the multi-vision system according to the second embodiment, the image quality adjusting unit 300 extracts a plurality of white balance setting values stored in the first display device determined as the reference display device. (Step 310).

The image quality adjusting unit 300 calculates an average value of the extracted plurality of white balance setting values in step 320.

In addition, the image quality adjusting unit 300 transmits the calculated average value to each other display device (step 330).

Subsequently, the other remaining display apparatus stores the average value transmitted through the image quality adjusting unit 300 and accordingly displays the image signal input from the outside by applying the stored average value (step 340).

In addition, referring to FIG. 7, in the screen realization method of the multi-vision system according to the third exemplary embodiment, the image quality adjusting unit 300 transmits the screen of the first display device determined as the reference display device to the other display device. Step 410).

In operation 420, the second display apparatus that receives the screen of the first display apparatus divides the screen of the display unit into a plurality of regions.

In operation 430, the second display apparatus displays a screen of the received first display apparatus in at least one of the divided regions.

In addition, the screen of the second display apparatus may be compared with the screen of the first display apparatus displayed on the one screen so that the screen of the second display apparatus is the same as the screen of the first display apparatus. The white balance setting value is set (step 440).

As described above, according to the exemplary embodiment of the present invention, a multi-vision having a more optimal image quality may be realized by minimizing the color difference of an image output from each display apparatus in an environment implementing multivision using a plurality of display apparatuses. This can improve user satisfaction.

100: remote controller
200: display device
300: image quality control unit
400: external device

Claims (14)

In the screen realization method of a multi-vision system to implement a multi-vision using a plurality of display devices,
Displaying images of a specific pattern on the plurality of display apparatuses;
Determining a first display device to be a reference of image quality adjustment among the plurality of display devices by using the displayed image; And,
And adjusting the image quality of the other second display apparatus using the determined first display apparatus. The method of claim 1,
And the specific pattern is a full white pattern. The method of claim 1,
Adjusting the image quality of the second display device
Transmitting the image quality adjustment value applied to the first display device to the second display device;
And changing the image quality adjustment value set in the second display apparatus by using the transmitted image quality adjustment value. The method of claim 3, wherein
And storing the transmitted image quality adjustment value of the first display device in the second display device. The method of claim 3, wherein
The transmitted image quality adjustment value is an average value of a plurality of image quality adjustment values stored in the first display device. The method of claim 3, wherein
Changing the image quality adjustment value
Calculating an average value of the transmitted image quality adjustment value and the image quality adjustment value previously stored in the second display apparatus;
And changing the image quality adjustment value set in the second display apparatus to the calculated average value. The method of claim 1,
Adjusting the image quality of the second display device
Dividing the screen of the second display device into at least a first area and a second area;
Displaying a screen of the first display device in the first area and displaying a screen of the second display device in the second area;
And comparing the screens displayed on the first and second areas, and changing the image quality adjustment value of the second display device. The method of claim 1,
Adjusting the image quality
And changing at least one image quality condition among white balance, contrast, brightness, and sharpness. A video signal supply unit for supplying a video signal;
A plurality of display apparatuses for receiving and displaying a video signal supplied through the video signal supply unit; And,
A multi display device comprising: an image quality adjusting unit configured to determine a first display device as a reference for image quality adjustment among the plurality of display devices, and to adjust the image quality state of the other second display devices based on the determined image quality state of the first display device. Vision system. The method of claim 9,
And the first display device is determined according to a display state of a full white pattern. The method of claim 9,
And the image quality adjusting unit changes the image quality adjusting value of the second display apparatus to the image quality adjusting value applied to the first display apparatus. The method of claim 9,
And the image quality adjusting unit changes the image quality adjusting value of the second display apparatus to an average value of a plurality of image quality adjusting values previously stored in the first display apparatus. The method of claim 9,
And the image quality adjusting unit changes the image quality adjusting value of the second display apparatus to an average value of the image quality adjusting value stored in the first display apparatus and the image quality adjusting value stored in the second display apparatus. The method of claim 9,
The image quality adjusting unit divides the screen of the second display device into a plurality, and controls the screen of the first display device and the screen of the second display device to be simultaneously displayed on the divided screen.
And the second display apparatus changes the image quality adjustment value using the plurality of displayed screens.

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