KR20090063639A - Apparatus and system for displaying - Google Patents

Abstract

A display device and a display system are provided to display an image on a sub display device even when a mode of a main display device is changed, thereby improving a viewer's watching environment. A demodulator(20) demodulates a broadcast channel selected through tuners(10,11). A demultiplexer(30) demultiplexes a signal demodulated by the demodulator. An image signal processor(40) controls so that the demultiplexed signal is outputted. A display unit displays a video signal outputted from the image signal processor. A controller controls so that the broadcast channel is transmitted through a scart terminal. A switching unit switches connection of source devices that provide video signals. The controller monitors whether the video signals are transmitted through the scart terminal.

Description

Display device and display system {Apparatus and system for displaying}

An embodiment of the present invention discloses a display apparatus and a system for transmitting and receiving an image signal using a scart terminal.

Recently, with the development of digital technologies such as digital image compression and digital modulation / demodulation, the standardization and commercialization of digital television broadcasting is rapidly progressing. Also, in the conventional terrestrial, satellite, and cable broadcasting, MPEG (Moving Picture Experts Group) It is becoming a digital trend based on).

In digital broadcasting, a plurality of broadcast programs encoded on the basis of MPEG are multiplexed and transmitted in the form of a transport stream (TS). The transport stream is received by a set-top box (STB) and a digital broadcast receiver installed on a receiving side and transmitted to a transport stream. Multiple broadcast programs included are demultiplexed.

Therefore, only one broadcast program desired by a user can be selected. Also, in a digital broadcast receiver such as a set-top box, a general television after restoring the selected broadcast program to an original audio and video signal using an MPEG decoder included in the receiver. It transmits to A / V (Audio / Video) output device.

In addition, a large-capacity hard disk is provided in a digital broadcasting receiver such as a set-top box, and the program stored in the hard disk is stored on the hard disk according to a user's request after recording and storing the broadcast program transmitted to an A / V output device such as a television. Digital broadcasting systems have also been developed and added with the addition of a digital broadcast recording / reproducing function of playing and outputting stored broadcast programs.

On the other hand, in the European broadcast recording system, for example, VCR, DVD-RW, PVR, etc., generally has a scart connection structure, and in the scart connection structure, the scart connector physically connects two video devices such as a TV and a VCR. Electrically interconnected, 21 female pins (21 pins for shielding) and male plug cables.

Stereo audio, composite video, and signal control are provided in both directions, and the RGB signal is the input. It is also known as a Euro connector because its interface is a European standard and is mounted on PAL TVs and VCRs.

As such, the 21-pin skat cable integrates all connections of audio, video and other control signals between the TV and the broadcast receiver into a single connector, which is convenient for users. When the skat cable is connected to TVs, VCRs, and PVRs, it can exchange audio and video signals between the products.

In the transmission and reception of the video signal using the skat cable, the video signal transmitted from the main TV is displayed on the sub-TV through the skat cable, the viewer watching the sub-TV can change the channel of the main TV When the selection of an external source for providing a video signal is changed, no signal appears.

That is, when the channel of the main TV is changed or the selection of an external source device that provides a video signal is changed, no signal is displayed on the sub-TV screen connected to the main TV through the scat cable.

An embodiment of the present invention is to propose a device and system that can improve the viewing environment of the sub display device in the transmission of video signals between the main display device and the sub display device.

The display device of the present embodiment includes at least one tuner, a demodulator for demodulating a broadcast channel tuned through the tuner, a demultiplexer for demultiplexing a signal demodulated by the demodulator, and the demultiplexed signal. A video signal processor for controlling the output of the video signal, a display for displaying the video signal output from the video signal processor, a controller for controlling a broadcast channel provided through the tuner to be transmitted through a scart terminal; And a switching unit which is connected to the control unit and switches the connection of the source equipments providing the video signal, wherein the control unit monitors whether the video signal is transmitted through the scat terminal and through the tuner according to the monitoring result. Provided video signal or source connected to the switching unit And an image signal supplied through the non-characterized by transmission through the SCART connector.

According to embodiments of the present invention, it is possible to select a video signal displayed on the sub display device displaying the video signal provided from the main display device, and also to change the mode of the main display device (eg, component mode, RGB). Mode or HDMI mode), the sub display apparatus may display an image, thereby improving the viewing environment of the viewer.

Hereinafter, with reference to the accompanying drawings for the present embodiment will be described in detail. However, the scope of the idea of the present invention may be determined from the matters disclosed by the present embodiment, and the idea of the invention of the present embodiment may be performed by adding, deleting, or modifying components to the proposed embodiment. It will be said to include variations.

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

1 is a block diagram illustrating a configuration of a main display apparatus according to an exemplary embodiment of the present invention, and FIG. 2 is a configuration of a sub display apparatus connected to the main display apparatus through a scat cable according to an exemplary embodiment of the present invention. A block diagram showing.

The main display device shown in FIG. 1 transmits a predetermined video signal to the sub display device through a skat cable, and the sub display device receiving the video signal processes the video signal to be displayed to the user.

In the case of understanding the system formed in the store displaying and selling the TV as the system of the present invention comprising the main display device and the sub display device, it will be helpful to understand the description disclosed below.

First, the main display device according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 1.

As shown in FIG. 1, the main display apparatus according to the present embodiment includes a first tuner 10 and a second tuner 11 as a tuner unit for tuning and outputting a broadcast signal, and a channel selected through the tuner unit. A demodulator 20 for demodulating the demodulator, a demultiplexer 30 for demultiplexing demodulated audio, video, DVB-SI and PSIP tables, and an image for controlling the output of the decoded video signal. And a display unit 50 for displaying a video signal output from the video signal processing unit 40.

In addition, a switching unit 60 for switching a plurality of external device source devices for providing a video signal, the switching control of the external image signal through the switching unit 60 and each component of the main display device It includes a control unit 90 for controlling the, and includes a user input unit 80 for receiving a command input by the user using a remote control unit or the like.

The apparatus further includes a scart terminal 70 for allowing a broadcast signal selected through the second tuner 11 to be transmitted through a scart cable, and the control unit 90 includes the scart terminal 70. Select and output the video signal transmitted through).

On the other hand, there is a pin that is not used as a reserved pin in the existing skat connector, Table 1 below shows the signal connected to the skat connector in the case of an RGB connection by way of example.

TABLE 1

Output connector Input connector One Audio right out 2 Audio right in 3 Audio left (or mono) out 6 Audio left (or mono) in 4 Audio return 4 Audio return 7 Blue out 7 Blue in 5 Blue return 5 Blue return 11 Green out 11 Green in 9 Green return 9 Green return 15 Red out 15 Red in 13 Red return 13 Red return 16 RGB status out 16 RGB status in 14 RGB status return 14 RGB status return 19 Sync (composite video) out 20 Sync (composite video) in 17 Sync return 18 Sync return 21 Shield 21 Shield

Application of the proposed embodiment of the present invention will be possible using pins that have not been used as spares in conventional skat connectors.

The controller 90 of the main display device controls the broadcast signal of the channel tuned through the second tuner 11 to be output through the scat terminal 70, and is output through the scat terminal 70. The signal may be a broadcast signal that is not demodulated or demultiplexed, or may be configured to output a demultiplexed video signal by the demodulator 20 and the demultiplexer 30.

The user may control a video signal to be output through the skat terminal 70 by operating a remote control unit, etc. In this case, the control unit 90 according to the user command input through the user input unit 80 The source of the video signal to be transmitted through the scart terminal 70 may be selected.

That is, the controller 90 transmits the broadcast signal tuned through the second tuner 11 or controls the switching unit 60 to be connected to an HDMI source or component device, which is an external device. The video signal provided from the control unit may be transmitted to the scart terminal 70.

In addition, the controller 90 monitors the presence or absence of a video signal transmitted through the skat terminal 70, and when a predetermined video signal (or broadcast signal) is not transmitted through the scat terminal 70. The control unit transmits an image signal input through the first tuner 10 or the second tuner 11.

That is, when the selection of the external source equipment is changed from the HDMI source to the component equipment by the user who controls the operation of the main display apparatus, the controller 90 may not transmit a signal through the skat terminal 70. Will occur.

In this case, the video signal transmitted through the tuner unit is transmitted to eliminate the case where the video display of the sub display device connected to the skat terminal 70 is no signal, thereby watching the sub display device. It is possible for the viewer to prevent the possibility of malfunction or failure of the display device.

In addition, when a signal such as a channel change of the sub display apparatus is received through the skat terminal 70, the controller 70 controls the second tuner 11 to select a broadcast signal according to the channel change. The process is performed, and the tuned broadcast signal is controlled to be transmitted through the scat terminal 70.

That is, bidirectional communication is established between the main display device and the sub display device through the skat terminal 70, and the viewer of the sub display device can control an operation such as a channel change separately from the main display device.

Meanwhile, a sub display device connected to the main display device illustrated in FIG. 1 through a scat cable will be described with reference to FIG. 2.

As shown in FIG. 2, the sub display apparatus according to the exemplary embodiment of the present invention includes a skat terminal 170 for transmitting and receiving data with the main display apparatus, and provides an image signal provided through the scat terminal 170. And an input signal processor 140 for processing.

In addition, the display unit 150 displays an image processed signal through the input signal processor 140, and includes a user input unit 180 that accepts a user's request.

In addition, the controller 190 may control each component for bidirectional communication between the main display apparatus and the sub display apparatus, and the controller 190 should be distinguished from the controller of the main display apparatus described above. The identification can be identified by reference numeral.

In the case of receiving a command such as a channel change through the user input unit 180, the controller 190 transmits the requested information to the main display device through the scat terminal 170, and the received image signal is received. Control to be displayed through the display unit 150.

The input signal processor 140 may include a demodulator, a demultiplexer, a video decoder, and the like of the main display device. However, the input signal processor 140 may be configured to supply a decoded video signal from the main display device. In the case of forming, the input signal processor 140 may be implemented only with a scaler or not included as a component.

As described above, the viewer of the sub display apparatus may change the channel separately from the main display apparatus. Meanwhile, in the home having two or more TVs, the TV viewing channel of the child may be changed. If you want to implement to control this can be implemented by the following embodiments.

That is, the controller 90 of the main display apparatus may set only the video signal included in a channel or an external device that is preset or set by a user to be transmitted through the scat terminal 70.

In this case, when receiving a channel change request command from the sub display apparatus, the controller 90 checks whether the channel is a viewable channel that has been stored and then changes to the set viewable channel only. The control unit transmits the signal of the broadcast channel tuned through the two tuners 11 through the scat terminal 70.

On the other hand, with reference to the accompanying drawings for the embodiment of the present invention disclosed as described above will be described for the method.

3 is a flowchart illustrating a control method of a display apparatus according to an exemplary embodiment of the present invention.

The display device disclosed in FIG. 3 uses the main display device described above as an example.

The control unit 90 of the display apparatus monitors the video signal transmitted through the scat terminal 70 (S031), and if there is no video signal output through the scat terminal 70 (S302), the tuner unit Whether there is a signal received through or whether there is a video signal provided from external source equipment for providing a video signal (S303).

Next, if there is an RF signal received through the tuner unit or a video signal provided from an external source device, the corresponding video signal is output through the scat terminal 70 so as to output a predetermined video signal through the sub display apparatus. Is controlled to be output (S304).

For example, when the channel search operation for searching for a broadcast signal is performed by the second tuner of the main display apparatus, the video signal output through the scat terminal 70 does not exist. 90 allows a signal of a broadcast channel tuned through the first tuner to be transmitted through the scart terminal 70.

Here, the control unit 90 may be a video signal provided from an external source device connected in accordance with the switching of the switching unit 60 instead of the signal of the broadcast channel tuned through the first tuner the scat terminal 70 It is also possible to control the transmission to be through.

Accordingly, the viewer who views the sub display apparatus can continue to watch a predetermined image even in the channel search process by the second tuner.

In detail, when a channel tuner or the like is performed by the tuner, the RF signal is not transmitted to the sub display apparatus connected to the scart terminal 70.

In this case, an image signal provided from an external source device connected to the switching unit 60 may be provided to the skat terminal 70 so that the viewer of the sub display apparatus can continuously watch the image. Provide it.

On the other hand, if it is determined in step S303 that there is no RF signal or A / V signal, a guide message including the content of the video signal received through the sub display apparatus may not be present. The control unit 90 transmits a predetermined guide message through the scart terminal 70 (S305).

In this case, the viewer of the sub display apparatus may view a message such as 'Host TV Auto Search' as a message that the main display apparatus is searching for a channel.

4 is a diagram for describing bidirectional communication between a main display device and a sub display device according to an exemplary embodiment of the present invention.

4 illustrates a first display device 410 as a main device and a second display device 420 as a sub device.

First, when the viewer of the second display device 420 inputs a command for changing a channel (S401), the second display device 420 receiving the command receives the first display through a scat cable. The device 410 transmits a signal of channel change (S402).

Next, the first display device 410 receiving the channel change signal tunes a channel by the second tuner according to a user's request (S403), and broadcasts the broadcast signal for the requested channel to the scart cable. Through the transmission to the second display device 420 (S404).

By this process, the viewer of the second display device 420 may also watch a channel different from the viewing channel of the first display device 410, except that the viewer of the second display device 420 may view the channel. Constraining the configuration is as described above.

According to the embodiments of the present invention as described above, it is possible to select a video signal displayed on the sub display device displaying the video signal provided from the main display device, and also to change the mode of the main display device (eg, component). Mode, RGB mode or HDMI mode), the sub display apparatus may display an image, thereby improving the viewing environment of the viewer.

1 is a block diagram illustrating a configuration of a main display device according to an embodiment of the present invention.

2 is a block diagram illustrating a configuration of a sub display apparatus connected to the main display apparatus through a scat cable according to an exemplary embodiment of the present invention.

3 is a flowchart illustrating a control method of a display apparatus according to an exemplary embodiment of the present invention.

4 is a diagram for describing bidirectional communication between a main display device and a sub display device according to an embodiment of the present invention;

Claims (6)

At least one tuner, A demodulator for demodulating a broadcast channel tuned through the tuner; A demultiplexer for demultiplexing a signal demodulated by the demodulator, An image signal processor for controlling the demultiplexed signal to be output; A display unit displaying an image signal output from the image processing signal unit; A control unit for controlling a broadcast channel provided through the tuner to be transmitted through a scart terminal; A switching unit connected to the control unit for switching a connection of source equipment for providing an image signal, The control unit monitors whether the video signal is transmitted through the skat terminal, and the video signal provided through the tuner or the video signal provided through source equipment connected to the switching unit according to the monitoring result. Display device characterized in that for transmitting through. The method of claim 1, The control unit controls the channel to be tuned through the tuner when the signal of the channel change is input through the scat terminal, and controls the signal of the tuned broadcast channel to be transmitted through the scat terminal. Display device. The method of claim 2, The control unit, in response to the signal of the channel change received through the scat terminal, And determining whether the channel is a preset or viewable channel, and determining whether to select a channel or transmit a signal of the tuned channel according to the determination result. In the display device connected to an external device for providing a video signal through a scat cable, A scart terminal for receiving a video signal provided from the external device; A display unit displaying an image signal provided from the skat terminal; A control unit for controlling transmission and reception of data through the scat terminal; A user input unit for inputting a selection command of an image signal received through the skat terminal, And the control unit transmits a signal corresponding to a channel change command to the external device through the scat terminal when the command for channel change is received through the user input unit. An image signal processor having a first tuner and a second tuner for receiving a broadcast signal, and controlling to output an image signal received through the first tuner, and for switching a connection of a source device providing an image signal. A first display device including a switching unit and a controller configured to control a signal received through the second tuner or a signal provided through the source equipment to be transmitted through a first scat terminal; And And a second display device having a second scat terminal to transmit and receive data through the first scat terminal. When the channel search by the second tuner is performed, the controller of the first display device may receive a signal provided from the first tuner or a signal provided from a source device connected according to a switch of the switching unit. Display system characterized in that the control to be transmitted through the scart terminal. The method of claim 5, wherein The second display device is capable of transmitting a signal of channel change through the second scart terminal, The control unit of the first display device that has received the channel change signal is tuned to the channel through the second tuner and transmits the received broadcast channel through the first scat terminal.

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