KR20000003835A - Television having a radio listening unit - Google Patents

Abstract

PURPOSE: A television set having a radio listening unit is provided to enhance a user's convenience. CONSTITUTION: The television set comprises a tuner(10) for tuning a broadcasting signal; a main IC(20) for demodulating the video and audio signal from the broadcasting signal; an audio amplifier(30) for amplifying the audio signal from the main IC(20); a video amplifier(40) for amplifying the video signal from the main IC(20) and a microcomputer(50) for controlling all operation of the television set. Wherein, the television set further includes a radio IC(80) for processing a radio frequency signal from the tuner(10); and a switching unit(90) for selectively providing the audio signals from the radio IC(80) or the main IC(20).

Description

TV with radio listener

FIELD OF THE INVENTION The present invention relates to television, and more particularly to a television for commercial use in a hotel. A television with a radio listening device is provided.

As the spread of television is saturated, at least one television is provided in each household. 1 is a block circuit diagram showing a schematic structure of a conventional television conventionally used.

As shown, a tuner unit 10 for receiving airwaves from an antenna is provided. Among the radio frequencies received through the antenna, a television signal or a radio broadcast signal is mixed. The radio wave signal received through the antenna is input to the tuner unit 10.

The tuner unit 10 tunes a specific broadcast signal in a radio frequency and outputs it to the main IC 20. The specific broadcasting station in the tuner unit 10 is performed by the control signal from the microcomputer 50. The microcomputer 50 is to control the overall stroke of the television and detects a signal input by a remote controller or a switch installed on the front of the television and performs an operation corresponding thereto.

In the main IC 20, an audio signal and a video signal are separated from the television reception signal input after being tuned from the tuner unit 10 and output. The audio signals separated and output from the main IC 20 are input to the audio amplifier 30. The input signal is amplified into a signal of sufficient magnitude and finally output through the speaker 60 as a sound signal that can be recognized by a person. On the other hand, the video signals of the R, G, and B signals output from the main IC 20 are also amplified to a sufficient size in the video amplifier 40 and finally displayed on the CRT 70 so that humans can visually recognize them. Will print to the screen.

Such televisions are not limited to viewing at home, but are often restricted to viewing at hotels and public offices. For example, hotels or motels have commercial televisions that calculate the viewing hours of televisions (in the case of wired broadcasting) and charge for them. In this case, the hotel user voluntarily refrains from watching TV in order to save money, but this may cause bad feelings in terms of service.

Or some users want to listen to the radio, but the hotel does not have a radio because it may not be able to listen to the radio broadcast. In addition, the viewing of television is restricted in public offices.

The present invention has been made to solve the above-mentioned inconvenience, the object of the present invention is to calculate the cost of watching television for commercial purposes, or if you do not want to watch the radio (radio) instead of watching television To provide a television with a radio listening device that allows the television to listen to the radio.

A television having a radio listening device according to the present invention for achieving the above object includes a tuner for receiving airwaves through an antenna and tuning a specific broadcast, and a main signal for demodulating and outputting a video signal and an audio signal among signals output from the tuner. An audio amplifier for amplifying an audio signal output from the main IC and outputting it through a speaker, a video amplifier for amplifying the video signal output from the main IC and outputting it through a CRT, A television comprising a microcomputer for controlling, the television comprising: a radio IC for modulating a radio frequency signal output from the tuner unit; And a switching unit for switching an audio signal output from the radio IC and the main IC by a selection signal by a user.

1 is a partial block diagram of a television conventionally used;

2 is a partial block diagram of a television according to the present invention;

3 is a flowchart showing an operating state of a television having a radio listening device of the present invention.

<Explanation of symbols for main parts of the drawings>

10: tuner section, 20: main IC,

30: audio amplifier, 40: video amplifier,

50: microcomputer, 60: speaker,

60a, 60b: speaker, 70: CRT,

80: radio IC, 90: switching unit,

100: remote control.

Hereinafter, a television with a radio listening apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

According to the present invention, a device capable of selecting and listening to radio broadcasting is added to a conventionally used television, which is used for commercial purposes and is charged for the use of the television. If you can listen to the radio.

According to the present invention, by receiving a radio broadcast through an antenna at a tuner of a conventionally used television and selecting a broadcast station from a radio IC 80 provided separately, the radio broadcast can be listened to on a television. According to the present invention, a switching unit 90 is provided at the output terminal of the main IC 20 to switch the output signal from the radio IC 80 and the output signal from the main IC 20.

Fig. 2 is a partial block circuit diagram of a television having the radio listening apparatus of the present invention as described above.

As shown, the radio IC 80 is connected in parallel with the main IC 20 at the output terminal of the tuner unit 10. Therefore, the radio tuned signal output from the tuner unit 10 is simultaneously input to the main IC 20 and the radio IC 80.

For each input signal, a radio signal or a television signal is selected in accordance with the tuning signal from the microcomputer 50. Therefore, the output signal is one of a radio signal or a television signal.

The control signal for selecting radio or television input to the microcomputer 50 is input by using an operation switch (not shown) installed on the front of the television or by using the remote controller 100. That is, after the user applies power to the television, the user selects the output or the radio output of the television and inputs a control signal to the microcomputer 50 through the remote controller 100.

The radio frequency signal input to the tuner unit 10 is a 10.7MHz signal in the case of the FM frequency. The input signal is separated / set by 8 to 10 MHz in the tuner section 10. This is because the data related to the band conversion is stored in advance in the microcomputer 50, and the frequency is converted as described above when the FM frequency signal is input. After being modulated by the tuner unit 10, the tuner 10 is tuned to the radio IC 80 and output to the switching unit 90.

The switching unit 90 is located at the output terminals of the main IC 20 and the radio IC 80. The switching unit 90 serves to cut one of the audio signal of the television output from the main IC 20 or the signal output from the radio IC 80 and output the other signal for signal switching.

The signal output from the radio IC 80 may be a stereo signal having L and R channels. That is, in the radio IC 80, it is possible to output a stereo signal in the radio signal as well.

The radio signal or audio signal tuned by the switching unit 90 is input to the audio amplifier unit 30 as the same level signal. The audio amplifier 30 amplifies the input signal into a signal having a sufficient magnitude and outputs it to the speakers 60a and 60b. At this time, the speaker is divided into two in order to output a stereo signal in the case of a radio signal. In fact, it is obvious to those skilled in the art to which the present invention pertains that there is no problem in outputting mono broadcasting using one speaker as shown in FIG. 1.

The operation and effect of the television with the radio listening device of the present invention will now be described with reference to the flowchart of FIG.

When the television is powered on, it stays on standby. At this time, when the RF signal is input, the tuner unit 10 is in a state of separating / setting each band (TV signal and radio signal) according to the band according to the control data of the microcomputer 60.

In this state, the signal source is selected by the user. The signal source can be selected at the starting point. The selection of the signal source is for example selected by the user using the operation switch of the remote control 100 or the television in order to watch television or listen to the radio.

When the signal source is selected, the microcomputer 50 outputs a control signal to the main IC 20 or the radio IC 80 to tune the selected television or radio band. For example, when a radio broadcast is tuned, the microcomputer 50 tunes the broadcast by outputting a control signal for selecting the broadcast to the radio IC 80.

If the television is selected, the control signal is output to the main IC 20 to output the control signal to tune the selected channel. The tuning data is stored in a memory device or the like connected to the microcomputer 50 in advance. At this time, the radio IC 80 can tune to a stereo broadcast.

After tuning as described above, an audio signal of a television is output from the main IC 20 or a radio broadcast signal is output from the radio IC 80. The switching unit 90 switches the circuit so that a specific signal is output according to the control signal of the microcomputer 50.

The signal output from the switching unit 90 is input to the audio amplifier 30 as being output after being adjusted to a signal of the same level. The input signal is amplified into a signal of sufficient magnitude and then output through the speakers 60a and 60b (in the case of stereo). When the user selects the radio broadcast, the user can listen to the broadcast through the speaker. When the user selects the TV broadcast, the user can listen to the audio signal through the speaker and simultaneously view the screen through the CRT 70.

According to the present invention as described above, the cost of watching television for commercial use in a hotel is not able to watch, or if you want to listen to the radio (radio) instead of watching television, there is an advantage that can listen to the radio in television. .

While the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited thereto, and modifications and improvements are possible within the scope of ordinary knowledge of those skilled in the art.

Claims (2)

A tuner unit 10 for receiving airwaves through an antenna and tuning a specific broadcast, a main IC 20 for demodulating and outputting a video signal and an audio signal among signals output from the tuner unit 10, and the main IC; Amplifying the audio signal output from the (20) to the audio amplifier 30 for output through the speaker 60, and to amplify the video signal output from the main IC 20 to output through the CRT (70) In the television comprising a video amplification unit 40 for controlling, and a microcomputer 50 for controlling the entire stroke, A radio IC (80) for modulating a radio frequency signal output from the tuner unit 10; And And a switching unit (90) for switching the audio signal output from the radio IC (80) and the main IC (20) by a selection signal. A television with a radio listening device according to claim 1, characterized in that the tuner section (10) separates and sets a radio signal frequency and inputs it to a radio IC (80).