KR100460954B1 - Image display device having external input port of multi use and control method thereof - Google Patents

Abstract

Disclosed are an image display apparatus having an external input terminal commonly used and a control method thereof. The image display device includes a display unit and a determination unit that determines the type of the video signal by checking the video signal input through at least one external input terminal and at least one external input terminal receiving the component video signal and the composite video signal from the external device. And a judging result of the discriminating unit, the control unit controls to display the display unit by separating the luminance signal and the color signal from the composite image signal. As a result, by providing a component video signal and a video video signal input from an external device, an external input terminal that can be used in common can be used to reduce material costs and reduce the space of an external device connecting portion, and improve convenience for a user's operation. Can be.

Description

Image display device having external input port of multi use and control method

The present invention relates to an image display apparatus and a control method thereof, and more particularly, to an image display apparatus and a control method thereof in which an external input terminal connected to an external device can be commonly used when receiving an image signal through an external device. will be.

As a general video display device, a television can receive and demodulate an RF broadcast signal through a tuner to watch terrestrial broadcast, and can also receive and watch various video signals from an external device. External devices that supply video signals include VCRs, DVDs, satellite receivers, and personal computers.

1 is a diagram illustrating an external input terminal of a conventional image display apparatus.

Referring to the drawings, a conventional video display device includes at least one component input terminal 10 and a video input terminal 20 for receiving an image signal by connecting an external device.

The component input terminal 10 includes a luminance signal input terminal Y for receiving a luminance signal from an external device such as a DVD player, a color signal input terminal Pb for receiving a color signal, and an audio signal for receiving an audio signal. Input terminals R and L are provided.

The video input terminal 20 includes a video signal input terminal V for receiving a video signal from an external device such as a VCR player and audio signal input terminals R and L for receiving an audio signal.

The reason for having the component input terminal 10 and the video input terminal 20 as described above is that the characteristics of the video signal input through the component input terminal 10 and the video signal input through the video input terminal 20 are different. Because it is different.

The video signal received through the component input terminal 10 is a signal in which the luminance signal and the color signal are transmitted independently, and the video signal received through the video input terminal 20 is a signal in which the luminance signal and the color signal are combined. to be.

Accordingly, the image display apparatus must perform a signal processing process separate from the image signal input through the component input terminal 10 for the image signal received through the video input terminal 20.

The conventional video display device is configured to include all external input terminals corresponding to the output port of each external device in consideration of the characteristics of the video signal output from the external device.

In this case, since external input terminals must be provided according to external devices that transmit video signals in various forms, there is a problem in that the complexity of the structure increases due to the increase in the external input terminals. In addition, as the external input terminal increases, the connection to an excessive external input terminal may be complicated when the external device is connected, which may cause inconvenience to the user.

SUMMARY OF THE INVENTION An object of the present invention is to provide a video display device having a component video signal input from an external device and an external input terminal which can be commonly used when receiving a video video signal, and a control method thereof.

1 is a view showing an external input terminal of a conventional video display device;

2 is a block diagram of an image display apparatus according to an exemplary embodiment of the present invention;

3 is a view illustrating an external input terminal shown in FIG. 2, and

4 is a block diagram of an embodiment of a control method of an image display apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

100: input unit 105: discrimination unit

110 control unit 115 selector

120: audio processing unit 125: audio output unit

130: speaker 135: image processing unit

140: image output unit 145: display unit

150: OSD generator

In order to achieve the above technical problem, an image display apparatus according to the present invention includes a display unit, at least one external input terminal receiving a component video signal and a composite video signal from an external device, and at least one external input terminal. A discrimination unit for determining the type of the video signal by checking the video signal; It has a control unit to control to.

At least one external input terminal includes a luminance signal input terminal, two color difference signal input terminals and an audio signal input terminal, wherein the luminance signal input terminal and the audio signal input terminal receive the component video signal and the composite video signal. Can be used for city use.

Preferably, the determination unit determines a type of the video signal by determining whether a color burst signal is included in the video signal input through at least one external input terminal, and the color burst signal is included in the video signal. If so, it is discriminated by the composite video signal.

In order to achieve the above technical problem, at least one external input terminal receiving the component video signal and the composite video signal from the display unit and the external device and the video signal input through the external input terminal are identified to determine the type of the video signal. And a judging unit for judging and a control unit for controlling the display unit to separate the luminance signal and the color signal from the image signal and to display the image signal when the image signal is determined to be the composite image signal. Determining the type of the video signal by checking the video signal input through an external input terminal and controlling to perform different image processing according to the type of the video signal determined in the determining step.

The control step controls to display the display unit by separating the luminance signal and the color signal from the video signal when it is determined that the video signal is the composite video signal.

In the determining step, it is preferable to determine a type of the video signal by determining whether a color burst signal is included in the video signal input through the external input terminal.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

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

Referring to FIG. 2, the image display apparatus includes external input terminals P1 and P2, an input unit 100, a discriminator 105, a controller 110, a selector 115, an audio processor 120, and an audio output unit. And a speaker 130, a speaker 130, an image processor 135, an image output unit 140, a display unit 145, and an OSD generator 150.

The external input terminals P1 and P2 include at least one input terminal for receiving a component video signal and a composite video signal from an external device (not shown). Examples of external devices that output component video signals include DVD players and DTVs, and examples of external devices that output composite video signals include VTR players.

FIG. 3 is a diagram illustrating an embodiment of the external input terminals P1 and P2 of FIG. 2.

Referring to the drawings, the external input terminals P1 and P2 receive the component 1 / video 1 input terminal P1 for receiving the image signal output from the component 1 or the video 1 and the image signal output from the component 2 or the video 2. A component 2 / video 2 input terminal P2.

The external input terminals P1 and P2 have luminance signal input terminals Y, two color difference signal input terminals Pb and Pr, and two audio signal input terminals R and L, respectively. Here, the luminance signal input terminal Y and the two audio signal input terminals R and L are input terminals commonly used when receiving a component video signal and a composite video signal.

When connected to an external device that outputs a component video signal, the luminance signal input terminal (Y), two color difference signal input terminals (Pb, Pr) and two audio signal input terminals (R, L) are used. In contrast, only the luminance signal input terminal (Y) and two audio signal input terminals (R, L) are used when connecting to an external device that outputs a composite video signal.

The input unit 100 includes a plurality of function keys for the user to select an operation of the image display apparatus. The input unit 100 may be installed on the main body by a wired method, or alternatively, a wireless remote controller may be applied.

In addition, the input unit 100 is provided with an output mode selection key (not shown) for switching an output mode for outputting an external video signal input from any one of the at least one external input terminals P1 and P2. For example, if there are component 1, component 2, video 1 and video 2 modes as the video signal output mode, the output mode selection key is selected by pressing the output mode selection key provided on the input unit 100 once. It is switched to the component 2 and can be applied by pressing it again to the video 1 mode.

The selector 115 selects one of at least one or more external devices connected through the external input terminals P1 and P2 in response to a user's operation command input through the input unit 100, and is input from the selected external device. External video signal can be output selectively.

The determination unit 105 checks the video signal input through the external input terminals P1 and P2 to determine the type of the video signal. The determination unit 105 determines whether a color burst signal is included in the image signal input through the luminance signal input terminal Y among the external input terminals P1 and P2 to determine the type of the image signal.

The determiner 105 determines the video signal as a composite video signal when the color burst signal is included in the video signal input through the luminance signal input terminal (Y). Unlike a component video signal, a composite video signal is transmitted by combining not only a luminance signal and a color signal but also a vertical / horizontal synchronization signal and a color burst signal into one signal.

The controller 110 controls the overall operation of the image display apparatus in response to the input signal of the input unit 100. In addition, when the determination result signal that the video signal input from the determination unit 105 through the external input terminals P1 and P2 is a component video signal or a composite video signal is input, the controller 110 has a characteristic of the input video signal. The image processor 135 and the audio processor 120 are controlled to fit the signal.

That is, when the determination result signal that the video signal input from the determination unit 105 through the external input terminals P1 and P2 is a composite video signal is input, the control unit 110 receives the vertical / horizontal sync signal and the luminance from the composite video signal. A signal and a color signal are separated and controlled to be displayed on the display unit 145.

In addition, the control unit 110 selects an output mode selection menu through which the input unit 100 selects at least one component and at least one video mode to output an image signal input through the external input terminals P1 and P2. to provide.

The output mode selection menu is stored in a storage unit (not shown) controlled by the controller 110 and displayed on the screen of the display unit 145 according to the control signal of the controller 110. For example, the component 1, component 2, video 1, and video 2 modes may be applied to the output mode selection menu.

When the determination result signal of the composite video signal is input from the determination unit 105, the controller 110 deletes the component 1 and 2 menus and controls only the video 1 and 2 menus to be displayed through the display unit 145. In contrast, the controller 110 may provide only the component 1 and 2 menus when the determination result signal indicating that the video signal input from the determination unit 105 through the external input terminals P1 and P2 is a component video signal is input. Do.

Meanwhile, the controller 110 mutes the screen of the display unit 145 when the user selection mode input through the input unit 100 is different from the output mode of the image signal input through the external input terminals P1 and P2. Process in the no signal state. For example, if the video signal inputted through the external input terminals P1 and P2 is a composite video signal and the user's selection mode is the component output mode, the controller 110 displays the screen of the display unit 145 in black or blue. Muting to the (Blue) screen. Alternatively, the controller 110 controls the OSD generator 150 to generate and output an error message on the screen of the display unit 145.

The audio processor 120 receives and demodulates the audio signal output from the selector 115 according to the control signal of the controller 110, and outputs the demodulated audio signal to the speaker 130 through the audio output unit 125. do. The audio processor 120 performs volume / sound quality adjustment, voice multiplexing, or stereo signal processing.

If the video signal output through the selector 115 is a composite video signal, the image processor 135 separates the vertical and horizontal synchronization signals from the composite video signal, separates the luminance signal and the color difference signal, and separates the separated video signal. The image is scaled to fit the display unit 145 and output to the display unit 145 through the image output unit 140.

On the other hand, when the image signal output through the selector 115 is a component video signal, the image processor 135 scales the component video signal to fit the display unit 145 and displays the display unit 145 through the image output unit 140. ) The component video signal is an input video signal in which the luminance signal and the color difference signal are separated. Therefore, the image processing unit 135 may output the component video signal only by scaling processing to fit the display unit 145.

The OSD generator 150 generates an error message according to the control signal of the controller 110 and displays the error message on a predetermined portion of the screen of the display unit 145.

The display unit 145 displays an image signal output from the image output unit 140 according to the control signal of the controller 110. Examples of the display unit 145 may be a cathode ray tube (CRT), a liquid crystal display (LCD), a plasma display (PDP), or the like.

Hereinafter, a method of controlling an image display device according to the present invention will be described with reference to FIG. 4.

The determination unit 105 receives a video signal input from an external device through the external input terminals P1 and P2 (S200), and includes a color burst signal in the video signal input through the luminance signal input terminal Y. It is determined whether the video signal is a composite video signal by checking whether the video signal is present (S210).

If the determination result signal indicating that the video signal input through the external input terminals P1 and P2 is a composite video signal is input in step S210, the controller 110 determines whether the user's selection mode is the composite mode (S220).

When the user selection mode is the composite mode corresponding to the video signal input through the external input terminals P1 and P2, the controller 110 may generate a vertical / horizontal sync signal, a luminance signal, and a luminance signal from the input video signal. The image processor 135 is controlled to separate the color difference signal (S230).

The image signal processed by the image processor 135 is output through the image output unit 140 and displayed on the screen of the display unit 145 (S240).

If the user selection mode is different from the mode of the video signal input through the external input terminals P1 and P2, the controller 110 generates an error message and displays the error message on the display unit 145. 150 is controlled (S250).

On the other hand, if it is determined in step S210 that the video signal input through the external input terminals (P1, P2) is not a composite video signal, the controller 110 receives the video signal input through the external input terminals (P1, P2) components. Judging by the video signal.

The controller 110 determines whether the selection mode received from the user through the input unit 100 is a component mode (S260). The controller 110 controls the video signal to be displayed on the screen of the display unit 145 when the user's selection mode matches the mode of the acid signal input through the external input terminals P1 and P2.

If the user's selection mode is different from the mode of the video signal input through the external input terminals P1 and P2, the controller 110 generates an error message and displays the error message on the display unit 145. 150, control (S270). The OSD generator 150 generates an error message according to the control signal of the controller 110 and displays the error message on the screen of the display unit 145.

According to the image display device and a control method thereof according to the present invention, by providing a component image signal and a video image signal input from an external device can be used in common to reduce the material cost and to reduce the space of the external device connection portion In addition, it is possible to improve convenience according to the user's operation.

Although the present invention has been described in detail with reference to exemplary embodiments in the above, those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention. Will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

Claims (7)

A display unit; An external input terminal configured to receive one of a component video signal and a composite video signal from an external device; A selection unit for selecting a type of the video signal to be input; A determination unit which checks the video signal input through the external input terminal and determines a type of the video signal; And If the selection result through the selection unit and the determination result of the determination unit coincide with each other, the input image signal is displayed on the display unit. A control unit which is separated and displayed on the display unit and controls the display unit to be processed by any one of a non-display process and an error display process when a result of selection by the selector and a discrimination result of the discriminator do not match. Display. The method of claim 1, The external input terminal includes a luminance signal input terminal, two color difference signal input terminal and an audio signal input terminal, And the luminance signal input terminal and the audio signal input terminal can be used in common when receiving the component image signal and the composite image signal. The method of claim 1, The determining unit determines a type of the video signal by determining whether the video burst signal is input to the video signal input through the external input terminal, and when the color burst signal is included in the video signal, the composite video signal. And a video display device characterized in that it is determined by. A control method of a video display device having an external input terminal for receiving any one of a component video signal and a composite video signal from a display unit and an external device, Selecting a type of the video signal to be input; Determining the type of the video signal by checking the video signal input through the external input terminal; Displaying the input image signal on the display unit if the selection result matches the determination result; And And if the selection result and the determination result do not match, controlling the display unit to be processed by any one of a non-display process and an error display process. The method of claim 4, wherein The display step, And when the image signal is determined to be the composite image signal, determining that the luminance signal and the color signal are separated from the image signal and displayed on the display unit. The method of claim 5, And determining the type of the video signal by determining whether a color burst signal is included in the video signal input through the external input terminal. The method of claim 4, wherein The external input terminal includes a luminance signal input terminal, two color difference signal input terminal and an audio signal input terminal, And the luminance signal input terminal and the audio signal input terminal can be used in common when receiving the component image signal and the composite image signal.