KR20070110666A - Video display device having a portable sub video display device - Google Patents

Abstract

A video display device having a portable subsidiary video display device is provided to receive a subsidiary screen broadcasting signal in the portable subsidiary video display device when the subsidiary screen broadcasting signal is transmitted by a PIP(Picture In Picture) function in a video display unit in which a plurality of tuners are mounted, thereby performing PIP function all the time. A video display device having a portable subsidiary video display device includes a video display unit(100) and a subsidiary video display unit. The video display unit simultaneously receives a main screen broadcasting signal and a subsidiary screen broadcasting signal through a plurality of tuners, directly outputs the main screen broadcasting signal and transmits the subsidiary screen broadcasting signal. The subsidiary video display unit receives the subsidiary screen broadcasting signal transmitted from the video display unit and outputs the received subsidiary screen broadcasting signal.

Description

VIDEO DISPLAY DEVICE HAVING A PORTABLE SUB VIDEO DISPLAY DEVICE}

1 is a block diagram of an image display device according to the present invention;

2 is a block diagram of an auxiliary image display device according to the present invention;

3 is a flowchart illustrating a sub screen display process according to the present invention;

<Explanation of symbols for the main parts of the drawings>

100: image display device 110: tuner unit

120: demodulation unit 130: Demux unit

140: decoder unit 150: command input unit

160: control unit 170: PIP processing unit

180: video format changing unit 190: sub-screen transmission unit

200: auxiliary image display device 210: sub-screen receiving unit

220: signal processor 230: video output unit

240: audio output unit 250: sub-screen command input unit

260: sub-screen control unit

The present invention relates to an image display apparatus, and more particularly, to an image display apparatus having a portable auxiliary image display apparatus.

As is well known, a picture in picture (PIP) function implemented in a video display device such as a television is divided into a main picture and a sub picture on a screen by using a main tuner and a sub tuner, and a screen tuned to by a tuner in each tuner. This function allows you to watch from. The broadcast of the channel tuned from the main tuner is displayed as the main picture on the screen, and the channel tuned from the sub tuner is displayed as the sub picture in a predetermined area of the main picture according to the PIP function. This PIP function is generally used for channel searching.

First, when the PIP function is selected, a predetermined channel is tuned from the subtuner. The channel tuned in the sub-tuner is a previously tuned channel, a favorite channel, or an arbitrary channel is tuned.

When tuning a channel through the PIP function, the channel of the channel displayed on the sub-screen is searched in advance and the desired channel is tuned.

For example, when a predetermined channel is displayed on the subscreen, the user presses a channel up / down key to search for a channel, and when a desired channel is found, for example, a main screen / subscreen switching command is input to switch the subscreen to the main screen.

As such, the PIP function divides a portion of the main screen to display a sub-screen. As a result, a part of the video signal displayed on the main screen is covered by the sub screen. Therefore, the sub-screen is overlaid on the main screen while the PIP function is being performed, so that the main screen cannot be viewed by the viewer as a full screen.

Korean Patent Laid-Open Publication No. 10-2004-0019797 discloses an "image display apparatus having a portable auxiliary image display apparatus."

The disclosed image display apparatus includes a first image display apparatus performing an independent function, a second image display apparatus performing an independent function and detachable from the first image display apparatus, and the first image display apparatus receives the broadcast signal. A first selector for selecting one of a plurality of channels, a plurality of external signals input and a broadcast signal received from the first tuner, a first image display device, and a second image display A first input unit for inputting a user's operation command to the apparatus, an interface for transmitting one input to the second image display apparatus when any one is inputted through the first input unit, and transmitting one of the inputs to the second image display apparatus And a first micom for controlling the interface to transmit, wherein the second image display apparatus includes a plurality of microcomputers corresponding to a channel selection command transmitted from the first image display apparatus. A second selector for selecting one of the channels, a channel selected from the second tuner, a second selector for selecting one of the external signal and the broadcast signal selected by the first selector, and a first image And a second micom for controlling the second selector in response to the channel selection command and the external input selection command transmitted from the display device.

In the image display device having such a portable auxiliary image display device, when the second image display device is electrically and mechanically mounted to the first image display device, the second image display device may be used for the first image device displaying the main screen. Displays the subscreen. In addition, when removed, it is operated as a portable image display device that performs independent functions. Therefore, the disadvantage of the PIP function in which the main screen and the sub-screen are overlapped is eliminated.

However, in the image display apparatus having the conventional portable sub image display apparatus as described above, the PIP function is performed only when the portable second image display apparatus is mounted on the first image display apparatus and is removed from the first image display apparatus. In this case, there was a problem that the PIP function cannot be performed.

In addition, the second image display device is equipped with a tuner, etc., and various components for broadcasting reception and display are mounted, there is a problem that the manufacturing cost is high.

In addition, when the main screen and the sub-screen are mutually switched, if the main tuner and the sub tuner are mounted in the same set, only the signal path switching can be implemented without additional tuning, but the main tuner and the sub tuner are the first video display device and the second display. Since the video display device is mounted separately, additional tuning is required when switching between the main screen and the sub-screen, and thus there is a problem that the image output is delayed.

The present invention has been proposed to solve such a conventional problem, and when a sub picture signal is wirelessly transmitted by the PIP function in a video display device equipped with a plurality of tuners, the sub picture signal is received by the portable sub image display device and displayed on the screen. It is an object of the present invention to provide an image display device having a portable auxiliary image display device for displaying.

Another object of the present invention is to wirelessly transmit an audio signal together with a sub-screen signal in a video display device to receive a sub-screen signal and an audio signal together in a portable auxiliary video display device to display and output a screen.

Another object of the present invention is to change the data format in accordance with the screen size of the portable sub-image display device before transmitting the sub-screen signal by wireless in the image display device.

An image display apparatus having a portable auxiliary image display apparatus according to the present invention for realizing the above objects, receives a main screen broadcast signal and a sub-screen broadcast signal through a plurality of tuners to output the main screen broadcast signal directly The screen broadcast signal includes an image display apparatus for wireless transmission and an auxiliary image display apparatus for receiving and outputting a sub-screen broadcast signal transmitted from the image display apparatus.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of an image display apparatus according to the present invention, and FIG. 2 is a block diagram of an auxiliary image display apparatus according to the present invention, and illustrates the case where the present invention is applied to a digital broadcasting receiver.

As described above, an image display device having a portable auxiliary image display device according to the present invention receives a main screen broadcast signal and a sub picture broadcast signal together through a plurality of tuners, and directly outputs the main picture broadcast signal, and the sub picture broadcast signal. Includes an image display apparatus 100 for wireless transmission and an auxiliary image display apparatus 200 for receiving and outputting a sub-screen broadcast signal transmitted from the image display apparatus 100.

The video display device 100 receives the main screen broadcast signal and the sub screen broadcast signal through the first tuner 111 and the second tuner 113, and receives the tuner 110 through the tuner 110. A demodulator 120 for demodulating the original signal and removing an error from the received signal, a demux unit 130 for extracting audio, video, additional data, and the like, for a program output through the demodulator 120; The decoder 140 decodes the data extracted by the demux unit 130 and outputs the audio and video, and inputs a PIP command for instructing the output of the main screen and the sub-screen. Control the entire system by outputting control signals for reproducing the main picture broadcast signal and the sub picture broadcast signal according to the PIP command through the command input unit 150 and the command input unit 150 for setting the reproducible data format. The control unit 160 and the control scene of the control unit 160 According to the request of the PIP processing unit 170 and the PIP processing unit 170 for changing the format and the wireless transmission of the sub-screen signal output from the decoder 140 according to the sub-picture signal output from the decoder 140 Sub-picture signal including a video format changing unit 180 for changing the data format of the video signal in the video signal and a video signal whose format is changed by the video format changing unit 180 at the request of the PIP processing unit 170. It includes a sub-screen transmitter 190 for wireless transmission.

The sub-image display apparatus 200 includes a sub-screen command input unit 250 for inputting a command for outputting a sub-screen and a sub-screen for receiving a sub-screen signal from the image display apparatus 100 according to the sub-screen output command. A sub-screen control unit 260 for outputting control signals for reproducing the sub-screen broadcast signal according to the receiving unit 210, a sub-screen output command, and a sub-screen receiving unit 210 according to a control signal of the sub-screen control unit 260. A signal processor 220 for processing the sub-screen signal received by the signal as a reproducible signal, a video output unit 230 for reproducing the video signal among the sub-screen signals processed by the signal processor 220, and a signal processor 220. And an audio output unit 240 for reproducing an audio signal among the sub-screen signals processed in the above.

The auxiliary image display apparatus 200 may be implemented as a dedicated portable image display apparatus for the present invention, or may be implemented by adding the components of FIG. 2 to a remote controller or a wireless communication device.

A process of reproducing the main screen and the sub-screen by the image display apparatus having the portable sub image display apparatus according to the present invention configured as described above will be described in detail below with reference to FIG. 3.

First, the user selects the PIP environment setting mode S301 through the command input unit 150 of the image display apparatus 100, and then sets the subscreen reproduction condition by the auxiliary image display apparatus 200 (S303). That is, the data format is set in consideration of the screen size of the auxiliary image display apparatus 200.

In the state where the sub picture reproduction condition is set as described above, according to a known broadcast reception procedure, a program output through the tuner unit 110 and the demodulator 120 is output from the demux unit 130 to the audio, video, and additional data. The extracted data is decoded by the decoder 17 and output as audio and video (S305).

Here, the digital broadcast signal received through the tuner unit 110 is composed of a transport stream consisting of predetermined packets, and each packet has its own packet ID so that it contains some information (audio, video channel, etc.). Perception can be distinguished. In addition, the transport stream includes not only audio and video packets, but also a program and system information protocol (PSIP), so that information on a program of each channel can be obtained. The packetized audio and video information can be viewed only if PSIP information is available. PSIP information includes event information table (EIT) information, which is commonly referred to as broadcast guidance, and program ID (PID) for broadcast guidance. ), Start time, broadcast time, program grade, video type, audio multiple, etc. are included.

On the other hand, when the user wants to output the sub-screen while the main screen is playing, the PIP function is selected through the command input unit 150 of the video display device 100, and the sub-screen command input unit of the sub-image display device 200 is displayed. Input the sub-screen output command through (250).

Then, the tuner unit 110 of the image display apparatus 100 receives the main screen broadcast signal through the first tuner 111 according to the control signal of the controller 160, and the sub-screen through the second tuner 113. A broadcast signal is received (S309).

After the main picture broadcast signal and the sub picture broadcast signal are demodulated by the demodulator 120, the demux 130 is extracted as audio, video, additional data, and the like, and decoded by the decoder 140.

The main screen broadcast signal decoded by the decoding unit 140 is output as video and audio through an output device which is integrally provided or connected to the video display device 100 according to the control signal of the controller 160, and the sub picture broadcast signal is It is provided to the PIP processing unit 170.

The PIP processing unit 170 requests the video format changing unit 180 to change the data format of the video signal included in the sub picture broadcasting signal according to the sub picture playing condition set in step S303. ) Changes the data format of the video signal (S311) and provides it to the PIP processing unit 170.

Then, the PIP processing unit 170 provides the sub picture transmitting unit 190 including the video signal whose format is changed by the video format changing unit 180 to the sub picture transmitting unit 190, and the sub picture transmitting unit 190 wirelessly transmits the sub picture broadcasting signal. Transmit (S313).

In this case, the sub-screen receiver 210 of the sub-image display apparatus 200 receives the sub-screen signal from the image display apparatus 100 according to the control signal of the sub-screen controller 260. The communication between the image display apparatus 100 and the auxiliary image display apparatus 200 may apply various communication methods such as Bluetooth.

The signal processor 220 processes the sub-screen signal received by the sub-screen receiver 210 into a reproducible signal according to a control signal of the sub-screen controller 260, and outputs a video output unit 230 and an audio output unit 240. To provide.

Then, the video output unit 230 reproduces the sub picture video among the sub picture broadcast signals, and the audio output unit 240 reproduces the sub picture audio among the sub picture broadcast signals.

It has been described so far limited to one embodiment of the present invention, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be construed as naturally included in the technical spirit described in the claims of the present invention.

As described above, according to the present invention, when the sub-screen signal is wirelessly transmitted by the PIP function in the image display apparatus equipped with a plurality of tuners, the sub-picture signal is received and displayed on the screen by the portable auxiliary image display apparatus. You can perform the PIP function at any time.

In addition, when the video display device wirelessly transmits the audio signal together with the sub-screen signal, the portable sub-video display device receives the sub-screen signal and the audio signal together to display and output the screen, thereby including the video and audio through the PIP function. You can watch the subscreen.

In addition, when the main screen and the sub-screen are interchanged, the main tuner and the sub tuner are mounted in the same set, so that the switching of the signal path can be implemented without additional tuning.

In particular, by changing the data format according to the screen size of the portable auxiliary video display device before transmitting the sub-screen signal wirelessly, the capacity of the transmission / reception data is reduced, thereby improving the data processing speed of the video display device. It is effective.

Claims (3)

An image display apparatus for receiving a main screen broadcast signal and a sub screen broadcast signal together through a plurality of tuners, directly outputting the main screen broadcast signal, and wirelessly transmitting the sub screen broadcast signal; Auxiliary image display device for receiving and outputting the sub-screen broadcast signal transmitted from the image display device Image display device having a portable auxiliary image display device comprising a. The method of claim 1, The video display device includes a tuner unit configured to receive a main screen broadcast signal and a sub screen broadcast signal through a plurality of tuners; A command input unit for inputting a picture in picture (PIP) command for outputting the main screen and the sub-screen, and for setting a data format reproducible in the sub-image display device; A controller for outputting control signals for reproducing the main screen broadcast signal and the sub screen broadcast signal according to the PIP command through the command input unit; A PIP processing unit for controlling format change and wireless transmission of the sub-screen signal according to a control signal of the controller; A video format changing unit for changing a data format of a video signal in the sub picture signal according to a request of the PIP processing unit; A sub-screen transmitter which wirelessly transmits a sub-screen signal including a video signal whose format is changed by the video format changer according to a request of the PIP processing unit; Image display device having a portable auxiliary image display device comprising a. The method according to claim 1 or 2, The sub-image display device includes: a sub-screen command input unit for inputting a command for outputting the sub-screen; A sub picture receiving unit which receives a sub picture signal from the image display device according to the sub picture output command; A sub-screen controller for outputting control signals for reproducing the sub-screen broadcast signal according to the sub-screen output command; A signal processor for processing a sub-screen signal received by the sub-screen receiver as a reproducible signal according to a control signal of the sub-screen controller; A video output unit for reproducing a video signal among the sub picture signals processed by the signal processor; An audio output unit for reproducing an audio signal among the sub picture signals processed by the signal processor Image display device having a portable auxiliary image display device comprising a.

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