KR19990012834U - TV outputting audio only from PITV with built-in AM / FM receiver - Google Patents

Abstract

The present invention relates to an apparatus for allowing only a voice of a television or a radio of a PIP television with an AM / FM receiver to be heard. In the general PIP television, when the viewer wants to listen to the voice only, the viewer can listen to the voice, but the video is displayed on the screen unnecessarily, which draws attention to the screen and wastes time. There is this. The present invention has been made in view of the above problems, when the viewer wants to listen to only the voice while watching a television having a PIP function, so that the image is not displayed on the screen so that only the voice can be listened to. A device is proposed to turn off both the screen and audio of a television and to listen to only the audio of a radio.

Description

TV outputting audio only from PITV with built-in AM / FM receiver

The present invention relates to a device that can only listen to voice in a PIP television with an AM / FM receiver. More specifically, when a viewer wants to listen to only the voice while watching a television having a PIP function, the image is displayed on the screen. TV for only outputting sound in PIP TV, which blocks the display so that only audio is output, and if you want to listen to only the audio of the radio, the screen is turned off and only the audio of the radio is output. for having receiver of AM / FM).

In general, a television receives a broadcast signal transmitted from a broadcasting station through an antenna and displays the broadcast signal on a receiving tube. The broadcast signal includes a composite video signal and an audio signal. The composite video signal may be divided into a sync signal and a video signal, and the video signal is divided into a luminance signal and a color signal, processed, and displayed on the receiving tube. In addition, the voice signal is obtained by extracting the FM signal from the received broadcast signal and FM detection, and amplified and output through the speaker.

When a multi-screen function is adopted for a television having the above function, a main screen and a plurality of sub-screens (PIP) are displayed on the screen of the television. In order to display the main screen and the sub screen, a separate video screen signal processing system is installed. That is, a main tuner circuit portion for receiving a main video signal displayed on the main screen is provided, and a sub tuner circuit portion for receiving sub video signals displayed on the sub screen is provided, and the main tuner circuit portion and the plurality of sub tuner circuit portions are broadcasted. It is connected to one antenna for receiving a high frequency signal which is a video signal and simultaneously receives all high frequency signals. Therefore, in order to display the sub-screens overlapped with a part of the main screen, a tuner circuit part for a separate sub-screen is installed so that the main screen is not output in the PIP area where the sub-screen is displayed, and the sub-screen is outputted. do.

1 is a block diagram schematically illustrating the operation of a television having a general PIP function.

Referring to FIG. 1, a main tuner circuit unit which selects a high frequency signal corresponding to a channel to be displayed on a main screen from among high frequency signals received through the antenna 10, converts it into an intermediate frequency, and then amplifies and generates a composite video signal. 20; A main video signal demodulator 70 for controlling the composite video signal applied from the main tuner circuit 20 to be displayed on the water pipe 80; A sub-tuner circuit unit 30 for selecting a high frequency signal corresponding to a channel to be displayed on a sub-screen among the high frequency signals received through the antenna 10, amplifying the signal to an intermediate frequency, and generating a composite image signal through a series of processes; A PIP control unit (50) connected to the sub-tuner circuit unit (30), for selecting and generating a composite video signal applied from the sub-tuner circuit unit (30) by a PIP function; A switching unit 60 connected between the main video signal demodulation unit 70 and the PIP control unit 50 and controlling a transmission path of signals transmitted between the main video signal demodulation unit 70 and the PIP control unit 50; And a signal connected to an external button unit (not shown) connected to the main tuner circuit unit 20, the sub tuner circuit unit 30, the main video signal demodulation unit 70, the PIP control unit 50, and the switching unit 60. According to the microcomputer 40 to control each operation.

In the television having the PIP function, the microcomputer 40 recognizes when the viewer selects a multi screen using a screen selection button of a button unit (not shown) while watching a broadcast program using the television having the PIP function. The multi-screen signal is applied to the PIP control unit 50, the OSD video signal corresponding to the number of the multi-screens is applied to the main video signal demodulation unit 70, and the main tuner circuit unit 20 is connected to the switching unit 60. The main video signal is blocked and only the signal applied from the PIP controller 50 is applied to the main video signal demodulator 70. The main video signal demodulator 70 displays an OSD screen on the water pipe 80 by an OSD blanking signal applied from the microcomputer 40, and the switching unit 60 is a multi-screen applied from the PIP controller 60. By applying all the video signals to the main video signal demodulator 70, the main video signal demodulator 70 blocks the main video signal applied from the main tuner circuit 20 and displays the video signal applied from the PIP controller 50. Display on. Therefore, the water pipe 80 displays a multi-screen selected by the viewer.

In the above PIP television, when the viewer wants to listen to the voice only, the viewer can hear the voice away from the television. However, since the video is displayed on the screen unnecessarily, the user can be distracted from the screen and waste time by not seeing other business. There is a problem. In addition, when the screen of the television is not displayed, a high voltage is supplied to the anode of the water pipe, so that power is unnecessarily wasted.

The present invention has been made to solve the above problems, an object of the present invention is to provide a device that can listen to only the voice by blocking the image is not displayed on the screen while watching a television having a PIP function.

Another object of the present invention is to provide an apparatus for listening to the radio only by installing an AM / FM receiver in a television having the PIP function.

1 is a block diagram schematically showing a television having a general PIP function;

2 is a block diagram schematically illustrating a TV that outputs only voice in a PIP TV with an AM / FM receiver according to the present invention;

3 is a circuit diagram illustrating a power supply circuit unit of FIG. 2.

Explanation of symbols for main parts of the drawings

10, 100: antenna 20, 150: main tuner circuit

30, 200: sub-tuner circuit 40, 300: microcomputer

50, 550: PIP control unit 60, 500: switching unit

70, 350: Main video signal demodulator 80, 450: Water pipe

250: AM / FM receiver 400: water pipe drive

600: voice signal demodulator 650: speaker

700: power supply circuit 750: voice function selection button

800: TV / radio switch button 850: AM / FM control button

900: flyback transformer (FBT) BD1: bridge rectifier circuit

T1: SMPS Transformer D1: Diode

In order to achieve the above object, the present invention includes a main tuner circuit unit for converting and amplifying a video signal of a selected channel into an intermediate frequency for display on a main screen among high frequency signals received through an antenna; A main video signal demodulator for detecting and demodulating the video signal from the main tuner circuit unit and outputting a video signal to the water pipe drive; A sub-tuner circuit unit which selects a high frequency signal received through an antenna and displays an image signal on a sub-screen displayed on the screen of the receiver; A PIP controller connected to the main video signal demodulator and controlling a sub video signal in a PIP mode; A switching unit connected between the PIP control unit and the main video signal demodulation unit and switching a video signal applied from the PIP control unit to the main video signal demodulation unit; An AM / FM receiver for receiving an AM / FM signal from an antenna; A voice signal demodulator for detecting a voice signal from an AM / FM signal applied from the AM / FM receiver and demodulating the voice signal into a signal suitable for output through a speaker; A power supply circuit unit for applying a voltage for driving the main video signal demodulation unit, the switching unit, the PIP control unit, the audio signal demodulation unit, and the water pipe; An AM / COM connected to the main tuner circuit portion, the sub tuner circuit portion, and the AM / FM receiving portion and configured to control the power supply circuit portion according to a signal applied from a TV / radio switching button, a voice function selection button, and an AM / FM adjustment button; Provided is a multi-screen television capable of outputting only audio from a television with an FM receiver.

According to the present invention, when a viewer switches on power of an AM / FM receiver and a television having a PIP function, a video signal, which is a broadcast program received through an antenna, is displayed on the receiving tube. In addition, when the viewer selects the screen of the television as the multi-screen, the main screen and several sub-screens are displayed in the receiving hall. When the viewer presses the voice function selection button in order to listen to the voice only in the state of the multi-screen, the microcomputer applies a control signal to the power supply circuit to block the voltage applied by the power supply circuit to drive the main video signal demodulator. Therefore, since the power supply circuit unit supplies power only to the audio signal demodulation unit, the viewer can hear only the voice of the television. In addition, if you press the TV / radio switch button to listen to the audio of the radio only, the AM / FM receiver and the audio signal demodulation unit is operated by the microcomputer, and the main video signal demodulation unit, the main tuner circuit unit, the sub-tuner circuit unit and the water pipe drive, etc. Since the power is cut off and not working, the viewer can only listen to the radio.

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

2 is a block diagram schematically illustrating a PIP television having a radio reception function according to the present invention.

Referring to FIG. 2, the high frequency signal received through the antenna 100 is applied to the main tuner circuit unit 150, and the main tuner circuit unit 150 is an image of a channel selected to be displayed on the main screen among the high frequency signals. The signal is converted and amplified to an intermediate frequency. The main video signal demodulation unit 350 is connected to the main tuner circuit unit 150. The main video signal demodulation unit 350 detects and demodulates an image signal applied from the main tuner circuit unit 150, and then receives the water pipe drive 400. ) Will output the video signal.

In addition, the high frequency signal received through the antenna 100 is applied to the sub-tuner circuit unit 200, the sub-tuner circuit unit 200 converts and amplifies the high frequency signal applied from the antenna 100 to an intermediate frequency The composite video signal is output. The PIP controller 550 is connected to the main video signal demodulator 350 and the sub tuner circuit 200, and the PIP controller 550 is applied from the sub tuner circuit 200 and the main tuner circuit 150 in the PIP mode. The video signal is controlled. A switching unit 500 is connected between the PIP control unit 550 and the main video signal demodulation unit 350, and the switching unit 500 transmits the PIP control unit 550 and the main video signal demodulation unit 350 to each other. The transmission path of the video signal is switched.

In addition, an AM / FM receiver 250 is connected to the antenna, and the AM / FM receiver 250 is switched to a mode capable of receiving AM / FM signals by the TV / radio switching button 800. When switching to a mode capable of receiving AM / FM signals by the TV / radio switching button 800, the AM / FM adjustment button 850 may selectively listen for AM and FM. A voice signal demodulator 600 is connected to the AM / FM receiver 250, and the voice signal demodulator 600 detects a voice signal from an AM / FM signal applied from the AM / FM receiver 250 and generates a speaker 650. ) And convert it into a signal suitable for output.

The microcomputer 300 is connected to the main tuner circuit unit 150, the sub-tuner circuit unit 200, and the AM / FM receiver 250, and the microcomputer 300 has a TV / radio switching button of the remote controller unit 900 ( 800, the audio signal demodulator 600, the PIP controller 550, the switching unit 500, the main video signal demodulator 350, and the AM / FM receiver 250 according to the signal applied from the voice function selection button 750. To control. In addition, a power supply circuit unit 700 is connected to the main video signal demodulation unit 350, the switching unit 500, the PIP control unit 550, the audio signal demodulation unit 600, and the water pipe 400. 700 controls the voltage supplied to each in accordance with the signal applied from the microcomputer 300.

The present invention made as described above is to press the voice function selection button 750 of the remote controller 950 when the viewer wants to hear only the voice while watching a broadcast program. When the voice function selection button 800 is selected, the voice selection signal generated from the remote controller 900 is applied to the input port A of the microcomputer 300 through a signal receiver (not shown) of the television. When the audio selection signal is applied, the microcomputer 300 outputs a control signal of the power supply circuit 700 to a control signal for cutting off the voltage supplied for driving the main video signal demodulator 350 through the output port B. To C). In addition, the microcomputer 300 applies a control signal to the output control terminal C of the power supply circuit unit 700 to maintain the voltage supplied for driving the voice signal demodulator 600 through the output port B. Images are not displayed on the water pipe 450 and only the audio signal is output through the speaker 650. Therefore, the image of the television can be listened to only the audio without being displayed on the receiving pipe 450 unnecessarily.

In addition, when the viewer wants to turn off both the video and audio of the television and listens to only the radio sound, the viewer presses the TV / radio switching button 800 of the remote controller 900. When the TV / radio switching button 800 is selected, the radio selection signal generated from the remote controller 950 is applied to the input port A of the microcomputer 300 through a signal receiver (not shown) of the television. When the radio selection signal is applied, the AM / FM receiver 250 is switched to a mode capable of receiving AM / FM signals, and the microcomputer 300 communicates with the AM / FM receiver 250 through the output port B. A control signal for applying a voltage required to drive the signal demodulation unit 600 is applied to the output control terminal C of the power supply circuit unit 700. Accordingly, the AM / FM receiver 250 that receives the voltage required for driving from the power supply circuit unit 700 receives the AM / FM signal through the antenna 100, and the received AM / FM signal is a voice signal demodulator 600. ) Is converted into a signal suitable for output through the speaker 650 is output. The AM / FM control button 850 of the remote controller 950 may select and listen to AM and FM.

3 is a circuit diagram illustrating a power supply circuit unit of FIG. 2.

Referring to FIG. 3, AC power applied from the outside through the plug F is applied to the bridge rectifying circuit BD1 and full-wave rectified, and then applied to the primary side of the SMPS transformer T1. The full-wave rectified current applied to the primary side of the SMPS transformer T1 is transformed into the main B + voltage on the secondary side and input to the flyback transformer FBT through the diode D1. The flyback transformer (FBT) divides the input main B + voltage and supplies it to each of the power supply terminals and the water pipe 450 that require power.

The present invention made as described above selects the voice function selection button 750 when the image of the television is turned off and only the voice is heard. When the voice function selection button 750 is selected, the voice selection signal from the remote controller 900 is applied to the input port A of the microcomputer 300 through a signal receiver (not shown) of the television, and the microcomputer ( 300 is applied to the output control terminal (C) of the power supply circuit unit 700 through the output port (B) to apply a control signal for cutting off the high voltage power required for driving the water pipe (450). Therefore, by cutting off the high voltage power supplied to the anode of the water pipe 450, it is possible to prevent unnecessary waste of power.

As can be seen from the above description, the present invention unnecessarily cuts off the power to drive the main video signal demodulator when the viewer wants to hear only the voice of the television while watching a PIP television with an AM / FM receiver. By preventing the display, only the voice can be heard, and even when only the radio is to be heard, the TV / radio switching button operates the AM / FM receiver and supplies the voltage to the audio signal demodulator so that only the voice of the radio can be listened to. Can be. In addition, when only the voices of the television and the radio are listened to, it is possible to prevent unnecessary waste of power by cutting off the high-voltage power supplied to the anode of the water pipe from the power supply circuit unit.

Claims (3)

A main tuner circuit unit 150 for converting and amplifying a video signal of a selected channel into an intermediate frequency among high frequency signals received through the antenna 100 to be displayed on a main screen; A main video signal demodulator (350) for demodulating the video signal received through the main tuner circuit unit 150 and then outputting the video signal to the water pipe drive 400; A sub-tuner circuit unit 200 for converting and amplifying a high frequency signal received through the antenna 100 into an intermediate frequency and displaying the same on a sub screen shown in the water pipe 450; A PIP controller 550 for mixing and outputting a main video signal and a sub video signal in the PIP mode; A switching unit 500 for switching the main image signal applied from the main tuner circuit unit 150 to the main image signal demodulation unit 350 and the PIP control unit 550; An AM / FM receiver 250 for receiving an AM / FM signal from the antenna 100; A voice signal demodulator 600 which detects a voice signal from the AM / FM signal applied from the AM / FM receiver 250 and demodulates it into a signal suitable for output through a speaker 650; A power supply circuit unit 700 for supplying a voltage for driving the main video signal demodulation unit 350, the switching unit 500, the PIP control unit 550, the audio signal demodulation unit 600, and the AM / FM receiver 250; And PIP television with a built-in AM / FM receiver, characterized in that consisting of a microcomputer 300 for controlling the power supply circuit 700 according to the signal from the TV / radio switching button 800 and the voice function selection button 750 TV can only output audio. According to claim 1, The microcomputer 300 when the viewer only listens to the voice of the television cut off the high-voltage power supplied to the water pipe 450 from the power supply circuit unit 700 unnecessary display of the image on the screen A television capable of outputting only audio from a PIP television with an AM / FM receiver, characterized in that a control signal is applied to prevent a signal from being generated. The apparatus of claim 1, wherein the microcomputer 300 operates the AM / FM receiver 250 to output the audio signal through the audio signal demodulator 600 when the viewer wants to turn off both the video and the audio of the television and listens to only the radio sound. A television capable of outputting only audio from a PIP television with an AM / FM receiver, characterized by applying a control signal.