KR20060136035A - Wireless television system and control method thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless television system capable of interworking between a main television and a wireless sub television receiving a composite video signal from the outside and a control method thereof. To this end, the main television of the present invention includes an external signal receiver for receiving a composite video signal from the outside, a video signal transmitter for transmitting the composite video signal to the sub television, a control signal receiver for receiving a control signal from the sub television, And a main video processing unit for displaying the composite video signal, and a main central processing unit for controlling interworking with the sub television, wherein the sub television includes a key pad unit for inputting a user command, and a composite video signal from the main television. A video signal receiver for receiving a video signal, a control signal transmitter for transmitting a control signal to a main television, a sub video display for displaying a composite video signal, and a sub central processing unit for controlling interworking with the main television. It is done.

According to this, as the wireless sub-TV controls the main television and the sub-TV to enable mutual interoperation between the televisions, the user's viewing of the television is convenient, and the channel selection characteristics are further improved.

Main Television, Sub Television, Wireless LAN, IR Transceiver, Encoder, Decoder

Description

Wireless television system and control method thereof

1 is a schematic view showing a wireless television system according to the prior art.

2 is a schematic view showing a wireless television system according to the present invention.

3 is a block diagram showing the configuration of a main television and a sub television according to the present invention;

Figure 4 is a block diagram showing the configuration of a central processing unit of a wireless television system according to the present invention.

5 is a flowchart illustrating a control method of a wireless television system according to the present invention.

The present invention relates to a wireless television system and a control method thereof. More particularly, the present invention relates to a wireless television system and a control method thereof capable of interworking between a main television and a wireless sub television.

In general, wireless communication systems are not restricted by geopolitical installation because they do not use cables, and there is no need to expand or change the lines even if the location of the terminal is changed or added or deleted. There is an advantage that can be significantly reduced. Therefore, in recent years, there has been an active movement for realizing a wireless communication environment using radio waves, light (infrared rays), etc. instead of a wired communication environment.

In such an atmosphere, a television system that can be viewed by a conventional wired cable connection can also be viewed by wireless. Such a wireless television system will be described with reference to FIG. 1.

1 is a schematic view showing a general wireless television system. As shown, the wireless television system 100 is a composite video signal input through the television broadcast signal input port 111, DVD / VCR signal input port 112, or S-video signal input port (not shown), etc. Wireless transmission device 110 for transmitting a wireless television 120, a wireless television 120 for receiving and displaying a composite video signal, and a remote control 130 for inputting a user's control command. It is configured to include.

The wireless transmitter 110 includes a wireless LAN and an antenna (not shown). When a control signal such as a channel change is input to the wireless television 120 by a viewer's remote controller 130, The control signal is received from the wireless television 120 and the tuner (not shown) is adjusted to transmit the composite video signal of the channel selected by the viewer to the wireless television 120.

However, according to the wireless television system 100 composed of the wireless transmitter 110 and the wireless television 120 as described above, only one television can be viewed through the wireless television 120, a plurality of wireless television In the system 100, there is a problem that each television operates independently of each other.

Accordingly, an object of the present invention is to provide a wireless television system and a control method thereof capable of viewing through main and sub televisions and interworking with each other by solving the above problems.

A wireless television system of the present invention for achieving the above object includes a main television and a wireless sub television, wherein the main television includes an external signal receiver for receiving a composite video signal from the outside, and the composite video signal. A video signal transmission unit for transmitting a video signal to the sub television, a control signal reception unit for receiving a control signal from the sub television, a main video display unit for displaying the composite video signal, and a main for controlling interworking with the sub television. And a central processing unit, wherein the sub-TV includes: a keypad unit for inputting a user command, a video signal receiving unit for receiving a composite video signal from the main television, and a control signal transmitting unit for transmitting a control signal to the main television And displaying the composite video signal. Broken image display unit, and is characterized in that it comprises a sub-CPU for controlling interworking with the main TV.

The control signal transmitter and the control signal receiver are preferably an infrared transmitter and an infrared receiver, respectively, and the key pad unit preferably includes a swapping input unit.

On the other hand, the sub central processing apparatus further includes a control signal classification unit for classifying the control signal according to the user's input according to the control target.

The main central processing unit may further include a main display control unit for controlling a display of a main television, a main transmission control unit for controlling transmission of a composite video signal to the sub television, and a control signal from the sub television. And a main receiving control unit for controlling a main display control unit and the main transmission control unit, wherein the sub central processing unit comprises: a sub display control unit for controlling a display of the sub television, a composite video signal received from the main television; And a sub reception control section for controlling the transmission of the information, and a sub transmission control section for transmitting the control signal to the main television.

In addition, the external signal input unit preferably includes two tuners to provide the PIP function to the main television and the sub television.

The present invention relates to a control method of a wireless television system, comprising: a first step of receiving a control signal from a user through a keypad unit of the sub-TV, a second step of classifying the control signal according to the control object, and And a third step of controlling the main television or the sub television according to the classified control signal.

In the second step, the input control signal is classified into a signal for controlling only the main television, a signal for controlling only the sub television, and a signal for controlling transmission from the main television to the sub television.

The control signal may further include a swapping control signal for exchanging the screen of the main television and the screen of the sub television with each other.

In addition, it is preferable that the above main television and sub television further include a PIP function.

Hereinafter, a wireless television system and a control method thereof according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a configuration diagram schematically showing a wireless television system according to the present invention. As shown, the wireless television system 200 of the present invention includes a main television 210 for receiving a composite video signal from the outside and a key pad unit 224 for performing a remote control function in itself. The wireless sub-TV 220 includes a composite video signal including a broadcast signal provided from a television program provider, a video signal supplied from a DVD / VCR device, an S-video signal supplied from various other digital devices, and the like. It includes.

The wireless television system 200 of the present invention, the main television 210 includes a video signal transmitter, etc., so as to transmit a composite video signal from the main television 210 to the sub-TV 220, the sub-TV 220 ) Includes a control signal transmitter to transmit a control signal to the main television 210. Therefore, the interoperability between the main television 210 and the sub television 220 becomes possible. This will be described with reference to FIGS. 3 and 4 below. However, hereinafter, a composite video signal provided from a television broadcast program provider among the composite video signals received from various sources will be described as an example.

3 is a block diagram schematically showing the configuration of a wireless television system according to the present invention, Figure 4 is a block diagram showing the configuration of a central processing unit of a wireless television system according to the present invention. 3 and 4, the wireless television system 200 according to the present invention includes a main television 210 and a wireless sub-TV 220.

The main television 210 displays a composite video signal input from the outside according to a user's request and enables the user to view the composite video signal through the main television 210 while providing the composite video signal and the main television 210 to the wireless sub-TV 220. And an external signal input unit 217, a control signal receiver 216, an image signal transmitter 215, a main image display unit 214, and a main central processing unit 213 so as to transmit the information of .

The external signal input unit 217 includes a tuner 217a connected to the broadcast signal input port 211, a video signal interface 217b connected to the DVD / VCR signal input port 212, and S-video. Receives a composite video signal from the outside through an S-video interface (not shown) connected to the signal input port. Here, two tuners 217a may be provided to provide a picture in picture (PIP) function to the main television 210 and the sub television 220.

The control signal receiver 216 is a control signal for controlling the broadcast channel, the volume, the screen brightness, etc. of the main television 210 in the sub television 220 and the broadcast channel to be transmitted from the main television 210 to the sub television 220. It can receive a control signal for controlling the.

The video signal transmitter 215 includes an encoder 215a for converting a composite video signal into a predetermined code sequence suitable for wireless transmission and a wireless LAN 215b for controlling wireless transmission. The video signal and the information may be transmitted to the sub television 220.

The main video display unit 214 may include a main video signal processor 214a for converting a complex video signal including audio and video into a predetermined form for a user to view, and a main display unit for displaying the composite video signal. 214b, the composite video signal can be displayed on the main television 210 according to a user's request.

On the other hand, the main central processing unit 213 includes a display control unit 213a for controlling the main video display unit 214 according to a control signal from the sub television 220, and a key pad unit 24 of the sub television 220. The transmission control unit 213b for controlling the transmission of the composite video signal to the sub-TV 220 and the transmission of information of the screen being watched on the main television 210 according to the control signal from the sub-TV 220, and from the sub-TV 220. And a reception control unit 213c for receiving a control signal and transmitting a control signal to the display control unit 213a and the transmission control unit 213b. However, the information includes a broadcast channel for each of the positive / sub picture displayed by the PIP function, the volume and the screen brightness.

In addition, although not shown, the main central processing unit may control the main television 210 by means of a keypad installed on the main television 210 itself, in addition to the control signal from the sub television 220, which may be used by a user. The control signal on request is made possible by being directly input to the reception control unit 213c of the main CPU.

Next, the sub-TV 220 controls the transmission of the composite video signal from the main television 210 to enable the sub-TV 220 to watch the composite video signal according to a user's request, while maintaining the main television 210. Key control unit 224, video signal receiver 221, control signal transmitter 222, and sub video display unit 225 so as to be able to control viewing and control the volume of the sub-TV 220 by itself. And a sub central unit 223.

The keypad unit 224 may input control signals according to a user's request to the main television 210 and the sub television 220.

The video signal receiver 221 includes a wireless LAN 221a and a decoder 221b for decoding the composite video signal encoded as described above, and the composite video signal and the main television 210 transmitted from the main television 210. ) Can receive information of the composite video signal being viewed.

The control signal transmitter 222 transmits a control signal for selecting a main television 210 control signal input through the keypad 224 and a broadcast channel of the sub television 220, and such a control signal transmitter 222. ) And the above-described control signal receiver 216 are each an infrared ray (IR) transmitter / receiver. According to this, the infrared transceiver used in the conventional general television can be easily applied to the present invention.

Meanwhile, the sub video display unit 225 includes a sub video signal processor 225b and a sub display unit 225a to display the composite video signal on the main television 210 by the control signal from the keypad unit 224. do.

Then, the sub-central device 223 is configured to control the volume and screen brightness of the sub-TV 220 and the keypad interface 223e for receiving a control signal from the input of the keypad unit 224 of the user. Display control unit 223a for controlling the sub-TV 220, transmission control unit 223c for controlling the control signal transmission to the main television 210, and information of the composite video signal transmitted from the main television 210; A reception controller 223b for receiving input and controlling to display corresponding information when a user requests an OSD, and a command classification unit 223d for applying a user's command to each of the controllers 223a to 223c of the sub-central device 223. Include.

In the wireless television system 200 as described above, the key pad unit 224 further includes a swapping input unit. According to this, by controlling the swapping input unit of the user, the broadcasting channel viewed on the main television and the broadcasting channel viewed on the sub television can be exchanged with each other. That is, when a swapping signal is input through the keypad interface 223e, the transmission control unit 223c of the sub-central processing unit controls the main television 210 according to the broadcast channel information of the current sub-TV 220 to control the main television 210. The main television is controlled so that the broadcast channel can be watched on the main television 210, and the composite video signal corresponding to the corresponding broadcast channel can be transmitted to the sub-TV 220 using the information of the main television 210 received at the same time. Control 220.

Further, swapping is also performed between the main and sub-screens of the main television 210 and the third television 220. That is, swapping is performed between the normal screens, the sub-screens, or the government screens of the televisions 210 and 220.

Hereinafter, a control method according to a preferred embodiment of the present invention wireless television system will be described.

5 is a flowchart illustrating a control method of a wireless television system according to the present invention. Referring to FIG. 5 with reference to the configuration of FIGS. 3 and 4, first, the sub central processing unit 223 receives a user command signal from the user keypad 224 while the wireless television system 200 is normally operating. Wait for reception (S510).

If the control signal from the keypad unit 224 is input by the user's operation (S520), the control signal classification unit 223d of the sub-central processing unit 223 classifies the control signal by its control target (S530). )do.

These control signals are classified into a signal S541 for controlling only the sub television 220, a signal S542a for controlling a channel of the sub television 220, and a signal S543a for controlling the main television 210. FIG. do. In addition, each control signal as described above includes a control signal for each positive / sub picture displayed on the main television 210 and the sub television 220 according to the PIP function.

That is, the signal for controlling only the sub-TV 220 may be, for example, a control (S541) such as volume and screen adjustment corresponding to the main / sub screen of the sub-TV 220. In this case, the control signal transmitter ( The sub image display unit 225 is controlled by the sub central processing unit 223 without requiring transmission and reception with the main television 210 through 222 (S542e).

The signal S542a for controlling the channel of the sub-TV 220 is received by the IR receiver 216 of the main television 210 by the control signal transmitted through the IR transmitter 222 (S542b). As a result, the main CPU 213 controls the tuner 217a of the external signal receiver (S542c). Therefore, the composite video signal corresponding to the selected broadcast channel is transmitted to the sub-TV 220 under the control (S542d) of the video signal transmitter 215 including the encoder 215a and the wireless LAN 215b. The composite video signal transmitted in this way is received through an antenna (not shown) of the sub-TV 220 and the wireless LAN 221a. The received composite video signal is displayed under the control of the sub image display unit S542e including the decoder 221b and the sub display 225a.

When the signal for controlling the main television 210 is received (S543a), the control signal transmitted (S543b) via the IR transmitter 222 is received by the IR receiver 216, and by this control signal The main CPU controls the tuner 217a of the external signal receiver (S543c). Accordingly, the composite video signal corresponding to the selected broadcast channel is displayed on the main television 210 under the control of the main video display unit S543d. In addition, adjustment of the volume and the brightness of the screen in addition to the broadcast channel is also possible in the same manner as described above. In addition, it will be apparent that the above control includes control of each of the main and sub picture of the main television 210.

On the other hand, while performing the above-described operations, the main CPU 213 transmits the information of the composite video signal corresponding to the main / sub picture displayed on the main television 210 to the sub television 220 at predetermined intervals. Send. The information of the composite video signal transmitted as described above is received through the antenna of the sub-TV 220 and the wireless LAN 221a, and the received information is output to the sub-central processing unit 223. Accordingly, when an on-screen display (OSD) control signal for requesting the current broadcasting information of the main television 210 is input by the user, the corresponding information is OSDed to the sub-TV 220 and viewed on the main television 210. It is possible to confirm the information of the composite video signal in progress.

The wireless television system and the control method thereof according to the present invention have been described above. Such a technical configuration of the present invention will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Accordingly, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.

As described above, according to the wireless television system and a control method thereof according to the present invention, the main television and the sub-TV can be interoperable, so that the user can easily view and control various channels.

Claims (10)

An external signal receiver for receiving a composite video signal from the outside, a video signal transmitter for transmitting the composite video signal to a sub television, a control signal receiver for receiving a control signal from the sub television, and a display of the composite video signal. A main television having a main video display unit and a main central processing unit for controlling interworking with the sub television; And A keypad for inputting a user command, a video signal receiver for receiving the composite video signal from the main television, a control signal transmitter for transmitting a control signal to the main television, and a sub video for displaying the composite video signal Sub television having a display unit and a sub central processing unit for controlling interworking with the main television Wireless television system comprising a. The method of claim 1, The control signal transmitter and the control signal receiver is an infrared (IR) transmitter and an infrared receiver, respectively. The method of claim 1, And the key pad portion comprises a swapping input portion. The method of claim 1, The sub central processing apparatus includes a control signal classification unit for classifying a control signal according to a user's input according to the control target. The method of claim 4, wherein The main central processing unit includes a main display control unit for controlling a display of a main television, a main transmission control unit for controlling transmission of a composite video signal to the sub television, and a main display according to a control signal from the sub television. A main reception control unit for controlling a control unit and the main transmission control unit; The sub central processing unit includes a sub display control unit for controlling a display of the sub television, a sub reception control unit for controlling a composite video signal received from the main television, and information transmission thereof, and a control signal to the main television. And a sub transmission control unit for transmitting. The method according to any one of claims 1 to 5, And the external signal input unit comprises a plurality of tuners to provide a picture in picture (PIP) function to the main television and the sub television. A first step of receiving a control signal from a user through a keypad portion of the sub television; Classifying the control signal according to its control object; And A third step of controlling the main television or the sub television according to the classified control signal; Control method of a wireless television system comprising a. The method of claim 7, wherein The second step is to classify the input control signal into a signal for controlling only the main television, a signal for controlling only the sub television, and a signal for controlling transmission from the main television to the sub television. Control method of a wireless television system. The method of claim 8, The control signal may further include a swapping control signal for exchanging a screen of the main television and a screen of a sub television with each other. The method according to any one of claims 7 to 9, The main television and the sub television further comprises a PIP function control method of a wireless television system.

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