KR20010036509A - A radio frequence television system - Google Patents

Abstract

PURPOSE: A wireless television system is provided to receive a television signal from a fixed television to a portable television by a wireless method and output the received television signal to an LCD and a speaker. CONSTITUTION: A high frequency receiving unit(210) receives a high frequency television signal from a fixed television in a wireless method and converts the received high frequency television signal into an intermediate frequency television signal. The second intermediate frequency amplifying unit(220) amplifies the intermediate frequency television signal output from the high frequency receiving unit(210) and divides the amplified intermediate frequency television signal into a video signal and an audio signal. The second video processing unit(230) performs a signal process for displaying the video signal output from the second intermediate frequency amplifying unit(220) on a LCD. The second audio processing unit(240) performs a signal process for outputting the audio signal output from the second intermediate frequency amplifying unit(220) to a speaker(SP). An infrared ray transmitting unit(260) converts a key input signal output from a key input unit(250) into an infrared ray signal and transmits the infrared ray signal. A microprocessor(270) controls the infrared ray transmitting unit(260), and receives the television signal from the fixed television for displaying the video signal on the LCD and outputting the audio signal to the speaker(SP).

Description

Wireless television system {A radio frequence television system}

The present invention relates to a wireless television system.

More specifically, the portable television relates to a wireless television system adapted to receive a television signal from a stationary television in a wireless manner and output it to a liquid crystal display and a speaker.

In general, portable television refers to a television produced in a form that is easily carried by an individual.

FIG. 1 is a block diagram showing a typical portable television. As shown in FIG. 1, a portable television includes a tuner (1), an intermediate frequency amplifier (2), an image amplifier (3), and an A / D converter (4). ), A matrix circuit 5, an electrode driver 6, a liquid crystal panel LCD, an FM detector 7, a low frequency amplifier 8, and a speaker SP.

In the portable television configured as described above, the tuner 1 tunes a high frequency television signal of a specific channel among the high frequency television signals received through the antenna ANT and converts the high frequency television signal into an intermediate frequency television signal. When outputting as, the intermediate frequency amplifier 2 amplifies the television signal of the intermediate frequency and outputs the video signal and the audio signal separately.

At this time, the audio signal is FM detected and then low frequency amplified and output to the speaker SP. The video signal is converted into a digital signal by the analog / digital converter 4 through an image amplifier 3 and then a matrix circuit ( 5) is converted into a signal form suitable for driving the liquid crystal panel (LCD), and then the liquid crystal panel (LCD) is driven by the electrode driver 6 to display an image signal on the screen.

The portable television configured as described above has an advantage that the viewer can watch the television anytime and anywhere because it is easy to carry.

However, the conventional portable TV as described above receives a television signal of airwaves through an antenna and displays the received television signal on a screen. However, there is a problem in that image quality is poor because airwaves are not properly received in a house or a building. .

Accordingly, an object of the present invention is to provide a wireless television system in which a portable television receives a television signal from a stationary television in a wireless manner and outputs it to a liquid crystal display and a speaker. have.

Wireless television system according to the present invention for achieving the above object,

A fixed television for tuning a television signal of a specific channel among the television signals of an airwave received through an antenna to display a video signal on a screen, outputting an audio signal to a speaker, and transmitting the tuned television signal in a wireless manner;

It is characterized by comprising a portable television receiving a television signal from the fixed television via an antenna to display a video signal on the screen and output the audio signal to the speaker.

1 is a block diagram showing a typical portable television;

2 is a perspective view showing a stationary television and a portable television combined with a remote controller of the wireless television system according to the present invention;

3 is a block diagram showing a fixed television of a wireless television system according to the present invention;

4 is a block diagram showing a portable television combined with a remote controller of the wireless television system according to the present invention.

* Names of symbols for main parts of the drawings

100: stationary TV 200: portable TV with remote control

110: tuner 120: first intermediate frequency amplifier

130: first image processor 140: first audio signal processor

150: high frequency transmitter 160: infrared receiver

170: first microcomputer 131: image detector

132: video amplifier 141: FM detector

142: low frequency amplifier SP: speaker

CRT: cathode ray tube LCD: liquid crystal panel

210: high frequency receiver 220: second intermediate frequency amplifier

230: second image processor 240: second audio signal processor

250: key input unit 260: infrared transmitter

270: second microcomputer 231: image amplifier

232: A / D converter 233: matrix circuit

234: electrode drive unit 241: FM detector

242: low frequency amplifier

Hereinafter, a wireless television system according to the present invention will be described with reference to the accompanying drawings.

2 is a perspective view showing a fixed television and a portable television combined with a remote controller of the wireless television system according to the present invention. FIG. 3 is a block diagram showing a fixed television of the wireless television system according to the present invention. A block diagram showing a portable television combined with a remote controller of the wireless television system according to the present invention.

As shown in FIG. 2, the wireless television system according to the present invention tunes a television signal of a specific channel among the television signals of airwaves received through the antenna ANT1 to display a video signal on a screen, and outputs an audio signal to a speaker. A fixed television (100) for transmitting the tuned television signal in a wireless manner; It is composed of a remote control portable television 200 that receives a television signal from the fixed television 100 through an antenna ANT2, displays a video signal on a screen, and outputs an audio signal to a speaker.

Here, as shown in FIG. 4, the remote control portable television 200 wirelessly receives a high frequency television signal from the fixed television 100 through an antenna ANT2 and converts the television signal into an intermediate frequency television signal. High frequency receiving unit 210; A second intermediate frequency amplifier 220 which amplifies the television signal of the intermediate frequency output from the high frequency receiver 210 and separates the television signal into an image signal and an audio signal; A second image processor 230 for signal processing to display an image signal output from the second intermediate frequency amplifier 220 on a liquid crystal display (LCD); A second voice processor 240 for signal processing to output a voice signal output from the second intermediate frequency amplifier 220 to a speaker SP; A key input unit 250 including a power on / off key channel up / down key, a volume up / down key, various numeric keys, and a viewing mode selection key; An infrared transmitter 260 for converting the key input signal output from the key input unit 250 into an infrared signal and transmitting the wireless signal in a wireless manner; While controlling the infrared transmitter 260 to convert the key input signal output from the key input unit 250 into an infrared signal and transmit it in a wireless manner, the fixed television 100 through the antenna ANT2 in the viewing mode. And a microcomputer 270 for receiving a television signal from the display, displaying a video signal on a screen, and controlling to output an audio signal to a speaker.

Also, as shown in FIG. 3, the fixed television 100 is a tuner which tunes and outputs a high frequency television signal of a specific channel among the high frequency television signals received through the antenna ANT1 and converts it into an intermediate frequency television signal. 110; A first intermediate frequency amplifier (120) for amplifying the television signal of the intermediate frequency output from the tuner (110) and separating the image signal into an audio signal and outputting the separated signal; A first image processor (130) for signal processing to display an image signal output from the first intermediate frequency amplifier (120) on a screen (CRT); A first voice processor 140 for signal processing to output a voice signal output from the first intermediate frequency amplifier 120 to a speaker SP; A high frequency transmission unit 150 for converting the television signal of the intermediate frequency output from the tuner 110 into a high frequency television signal and transmitting in a wireless manner; An infrared receiver unit 160 for wirelessly receiving an infrared signal transmitted from the remote controller portable television 200; While controlling the power on / off, channel selection, and volume up / down by the infrared signal received by the infrared receiver 160, the high frequency television signal of the intermediate frequency television signal output from the tuner 110 in the viewing mode is controlled. The first microcomputer 170 controls the high frequency transmission unit 150 to convert the signal into a wireless transmission method.

Next, the operation and effects of the wireless television system according to the present invention configured as described above will be described in detail in a normal mode and a portable television viewing mode.

1.In normal mode

When a plurality of high frequency television signals are received by the tuner 110 of the fixed television 100 through the antenna ANT1, the first microcomputer 170 transmits a high frequency television of a specific channel among the plurality of high frequency television signals. The tuner 110 controls to tune the signal. Accordingly, the tuner 110 converts the tuned high-frequency television signal into an intermediate frequency television signal and outputs the signal.

The television signal of the intermediate frequency output from the tuner 110 is amplified by the first intermediate frequency amplifier 120 and separated into an image signal and an audio signal, and the image signal is input to the first image processor 130. The voice signal is input to the first voice processor 140.

Accordingly, the first image processor 130 processes the signal to display the image signal on the screen (CRT).

That is, the image signal is separated into a luminance signal, a carrier color signal, and a synchronization signal by the image detector 131, and then amplified to a size sufficient to drive the cathode ray tube (CRT) in the image amplifier 132, and thus the cathode ray tube (CRT). ) Display on the screen.

In addition, the first voice processor 140 processes a signal to output a voice signal to the speaker SP.

That is, the voice signal is FM detected by the FM detector 141 and then low frequency amplified by the low frequency amplifier 142 and output to the speaker SP.

In this case, when the user operates the key input unit 250 of the portable remote control combined use television 200, for example, when the user inputs a key to switch the channel to a channel other than the channel currently being watched, the second microcomputer 270 Detects this and controls the infrared transmitter 260 to convert the channel switching key input signal into an infrared signal and transmit the signal in a wireless manner.

Accordingly, when the infrared signal is received by the infrared receiver 160 of the fixed television 100, the first microcomputer 170 detects channel switching key input information from the infrared signal received by the infrared receiver 160. The channel is tuned by controlling the tuner 110 according to the key input information.

As a result, the television signal of the retuned channel is output to the cathode ray tube CRT and the speaker SP.

2. In portable TV viewing mode

On the other hand, when the user wants to watch the channel watched on the fixed television by the remote controller portable television 200, when the user operates the viewing mode selection key of the remote controller combined portable television 200, the second micro The computer 270 detects this and controls the infrared transmitter 260 to convert the viewing mode selection key input signal into an infrared signal and transmit the signal wirelessly.

Accordingly, when the infrared signal is received by the infrared receiver 160 of the fixed television 100, the first microcomputer 170 receives the viewing mode selection key input information from the infrared signal received by the infrared receiver 160. The controller controls the tuner 110 and the high frequency transmitter 150 according to the key input information.

That is, the first microcomputer 170 controls the tuner 110 to output the television signal of the intermediate frequency to the first intermediate frequency amplifier 120 and also to the high frequency transmitter 150. The high frequency transmitter 150 converts the television signal of the intermediate frequency output from the tuner 110 into a television signal of high frequency and transmits the signal in a wireless manner.

Accordingly, the high frequency receiver 210 of the portable television 200 combined with the remote control receives a high frequency television signal from the fixed television 100 through the antenna ANT2 in a wireless manner and converts it into an intermediate frequency television signal.

The second intermediate frequency amplifier 220 amplifies the intermediate frequency television signal output from the high frequency receiver 210 and separates the video signal into an audio signal, and the image signal is input to the second image processor 230. The voice signal is input to the second voice processor 240.

In this case, the second image processor 230 performs signal processing to display the image signal on a liquid crystal display (LCD).

That is, the image signal is converted into a digital signal by the analog / digital converter 232 through the image amplifier 231 and then converted into a signal form suitable for driving the liquid crystal panel (LCD) in the matrix circuit 233. Next, the electrode driver 234 drives the liquid crystal panel LCD to display an image signal on the screen.

In addition, the second voice processor 240 processes a signal to output a voice signal to the speaker SP.

That is, the voice signal is FM detected by the FM detector 241 and then low frequency amplified by the low frequency amplifier 242 to be output to the speaker SP.

In this case, when the user operates the key input unit 250 of the portable remote control combined use television 200, for example, when the user inputs a key to switch the channel to a channel other than the channel currently being watched, the second microcomputer 270 Detects this and controls the infrared transmitter 260 to convert the channel switching key input signal into an infrared signal and transmit the signal in a wireless manner.

Accordingly, when the infrared signal is received by the infrared receiver 160 of the fixed television 100, the first microcomputer 170 detects channel switching key input information from the infrared signal received by the infrared receiver 160. The channel is tuned by controlling the tuner 110 according to the key input information.

Accordingly, the television signal of the re-tuned channel is output to the cathode ray tube (CRT) and the speaker (SP) of the fixed television (100) and the liquid crystal panel (LCD) and the speaker (SP) of the portable television (200) combined with a remote controller. It is also output to the output.

As described above, in the wireless television system according to the present invention, the portable television 200 receives a television signal wirelessly from the fixed television 100 and displays it on the LCD screen, thereby providing a clear image quality to the user. By combining the portable television 200 integrally with the remote controller for remote control of the fixed television 100, there is an effect that it provides a variety of functions to the user conveniently.

Claims (6)

Fixed television (100) for tuning a television signal of a specific channel among the television signals received through the antenna (ANT1) to display a video signal on a screen, outputting an audio signal to a speaker, and transmitting the tuned television signal in a wireless manner. ) And; A wireless television comprising a portable television 200 which receives a television signal from the fixed television 100 through an antenna ANT2, displays a video signal on a screen, and outputs an audio signal to a speaker. system. The fixed television 100 according to claim 1, A tuner 110 which tunes a high frequency television signal of a specific channel among the high frequency television signals received through the antenna ANT1, and converts the converted high frequency television signal into an intermediate frequency television signal; A first intermediate frequency amplifier (120) for amplifying the television signal of the intermediate frequency output from the tuner (110) and separating the image signal into an audio signal and outputting the separated signal; A first image processor (130) for signal processing to display an image signal output from the first intermediate frequency amplifier (120) on a screen (CRT); A first voice processor 140 for signal processing to output a voice signal output from the first intermediate frequency amplifier 120 to a speaker SP; And a high frequency transmission unit (150) for converting the television signal of the intermediate frequency output from the tuner (110) into a high frequency television signal and transmitting in a wireless manner. The portable television 200 of claim 1, A high frequency receiver 210 for receiving a high frequency television signal from the fixed television 100 through an antenna ANT2 in a wireless manner and converting the television signal into an intermediate frequency television signal; A second intermediate frequency amplifier 220 for amplifying the TV signal of the intermediate frequency output from the high frequency receiver 210 and separating the video signal into audio and video signals; A second image processor 230 for signal processing to display an image signal output from the second intermediate frequency amplifier 220 on a liquid crystal display (LCD); And a second audio processor (240) for signal processing for outputting the audio signal output from the second intermediate frequency amplifier (220) to a speaker (SP). The portable television 100 of claim 1, Wireless television system, characterized in that integrated with a remote controller (Remot Controller) for remote control of the fixed television (100). The portable remote control combined use television 200 according to claim 4, A high frequency receiver 210 for receiving a high frequency television signal from the fixed television 100 through an antenna ANT2 in a wireless manner and converting the television signal into an intermediate frequency television signal; A second intermediate frequency amplifier 220 which amplifies the television signal of the intermediate frequency output from the high frequency receiver 210 and separates the television signal into an image signal and an audio signal; A second image processor 230 for signal processing to display an image signal output from the second intermediate frequency amplifier 220 on a liquid crystal display (LCD); A second voice processor 240 for signal processing to output a voice signal output from the second intermediate frequency amplifier 220 to a speaker SP; A key input unit 250 provided with a power on / off key, a channel up / down key, a volume up / down key, various numeric keys, and a viewing mode selection key; An infrared transmitter 260 for converting the key input signal output from the key input unit 250 into an infrared signal and transmitting the wireless signal in a wireless manner; While controlling the infrared transmitter 260 to convert the key input signal output from the key input unit 250 into an infrared signal and transmit it in a wireless manner, the fixed television 100 through the antenna ANT2 in the viewing mode. And a second microcomputer (270) for receiving a television signal from the display, displaying a video signal on a screen, and controlling to output an audio signal to a speaker. The stationary television 100 according to claim 4, A tuner 110 which tunes a high frequency television signal of a specific channel among the high frequency television signals received through the antenna ANT1, and converts the converted high frequency television signal into an intermediate frequency television signal; A first intermediate frequency amplifier (120) for amplifying the television signal of the intermediate frequency output from the tuner (110) and separating the image signal into an audio signal and outputting the separated signal; A first image processor (130) for signal processing to display an image signal output from the first intermediate frequency amplifier (120) on a screen (CRT); A first voice processor 140 for signal processing to output a voice signal output from the first intermediate frequency amplifier 120 to a speaker SP; A high frequency transmission unit 150 for converting the television signal of the intermediate frequency output from the tuner 110 into a high frequency television signal and transmitting in a wireless manner; An infrared receiver unit 160 for wirelessly receiving an infrared signal transmitted from the remote controller portable television 200; While controlling the power on / off, channel selection, and volume up / down by the infrared signal received by the infrared receiver 160, the high frequency television signal of the intermediate frequency television signal output from the tuner 110 in the viewing mode is controlled. And a first microcomputer (170) for controlling the high frequency transmission unit (150) to convert the signal into a radio transmission system.