KR960008065B1 - Television receiver having time indicating function - Google Patents

Abstract

The television receiver has a time display function to inform the viewer of the accurate time by receiving the time information transmitted from a radio system. The television receiver comprises: a sound reception means to generate a television sound signal from the television broadcasting signal received; a radio and time reception means to generate a radio sound signal and time data from the radio broadcasting signal; a switching means switching the television sound and radio signals to speakers; and a displaying means for displaying time data from the radio and time reception means obtained from the radio and time reception means.

Description

TV receiver with time display

1 is a block diagram of a sound processing circuit of a conventional television receiver.

2 is a block diagram of a television receiver having a time display function according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

24,30: 1st and 2nd tuning units 26,44,50: 1st to 3rd amplifiers

28,32: first and second IF processor 34,42: first two voice detector

36: control switch 38, 40, 52: 1 ~ 3 crystal transmitter

46: speaker 48: band pass filter

54: data damper 56: data relay

58: automatic gain controller 60: microcomputer

62: display mechanism 64: indicator

RI: resistors C1 to C4: capacitors.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver for receiving a television broadcast signal propagated from a television station, and more particularly to a television receiver having a time display function for receiving and displaying time information transmitted from a radio station and informing a user of an accurate time. It is about.

Recently, in order to notify the listeners of the correct date and time, radio stations transmit radio signals to which the date, time and minute at the time of the broadcast are added in addition to the voice information. The lion receiver receiving the radio signal to which the time information is added separates the time information added to the radio signal and displays the separated time information on the display device so that the listener can know the correct date and time.

In addition, a conventional television receiver receives a television signal transmitted from a television station, separates a video signal and an audio signal from the received television signal, and calls the separated video signal a cathode ray tube (CRT). The voice signal is transmitted through the speaker while being displayed on the screen. The television receiver further includes various auxiliary functions in addition to the original television signal reception function for user convenience and to increase the added value of the product.

Among the auxiliary functions added to the television receiver, there is no function for displaying time, and the audio processing circuit of the television receiver is also configured to process the audio signal included in the television signal. It did not have the function of separating and displaying. For reference, the configuration of the sound processing circuit of the conventional television receiver will be described with reference to FIG.

Referring to FIG. 1, a voice of a television receiver having a tuner 10 for tuning an RF signal including a television signal from a radio frequency signal (hereinafter referred to as RF) received through an aerial line ANT. The processing circuit is described. The tuner 10 frequency-converts the tuned RF signal to generate an intermediate frequency (hereinafter referred to as IF) and supplies the generated IF signal to the first amplifier 12. The first amplifier 12 amplifies the IF signal from the tuner 10 to have a predetermined size and supplies the amplified IF signal to the intermediate frequency processor 14. The intermediate frequency processor 14 detects a television audio carrier signal from the amplified IF signal and converts the detected television audio carrier signal through a current limiting resistor R1 and a coupling large capacitor C1. 16). The aqueous oscillator 16 constituting the band pass filter together with the resistor R1 and the condenser C1 is an unnecessary low frequency component and a high frequency component included in the detected television sound carrier signal from the intermediate frequency processor 14. The noise signal is removed and the television voice carrier signal from which the noise signal is removed is supplied to the speech detector 18. The voice detector 18 then detects the television voice carrier signal from the crystal oscillator 16 to generate a television voice signal and supplies the detected television voice signal to the second amplifier 20. The second amplifier 20 power-amplifies the detected voice signal and transmits the power-amplified voice signal through the speaker 22 so that the user can listen to the power-amplified voice signal.

As described above, the conventional television receiver can only receive a television signal transmitted from a broadcasting station, but cannot receive and display time information added to the radio signal.

Accordingly, an object of the present invention is to provide a television receiver having a time display function for receiving and displaying time information transmitted from a radio station so as to notify a user of an accurate date and time.

In order to achieve the above object, a television receiver having a time display function according to the present invention comprises a television audio receiving means for receiving a television broadcasting signal through an aerial and generating a television audio signal, and receiving a radio broadcasting signal through an aerial. Radio and time receiving means for generating an audio signal and time data, switching means for switching the television sound signal and the radio voice signal toward a speaker, and for displaying time data from the radio and time receiving means And display means.

Other objects and advantages of the present invention other than the above objects will become apparent from the detailed description of the following embodiments with reference to the accompanying drawings.

Hereinafter, with reference to the accompanying Figure 2 an embodiment of the present invention will be described in detail.

2, a time display function according to an embodiment of the present invention is provided with a tuner 24 for tuning an IF signal including a television signal from an RF signal received through the first air line ANT1. A television receiver is described. The tuner 24 frequency-converts the tuned RF signal to generate an IF signal and supplies the generated IF signal to the first amplifier 26. The first amplifier 26 amplifies the IF signal from the tuner 24 to have a predetermined size and supplies the amplified IF signal to the first IF processor 28. The first IF processor 28 detects a television voice carrier signal from the amplified IF signal.

The television receiver having the time display function further includes a second tuner 30 for tuning the RF signal including the time information and the radio broadcast signal from the RF signal received through the second air line ANT2. The second tuner 30 frequency-converts the tuned RF signal to generate an intermediate frequency signal and supplies the intermediate frequency signal to the second IF processor 32. The second IF processor 32 detects a radio voice carrier signal from the IF signal from the second tuner and supplies the detected radio voice carrier signal to the first voice detector 34. Then, the voice detector 34 demodulates the radio speech signal by filtering the detected radio speech carrier signal from the second IF processor 32 with a reference frequency signal generated by a crystal oscillator embedded therein.

In addition, the television receiver having a time display function according to an embodiment of the present invention flows the television voice carrier signal from the first IF processing unit 28 toward its first selective contact point SP1 and the first voice detector (1). And a control switch 36 for introducing the demodulated radio voice signal from the receiver 34 into its second selective contact point SP2. The control switch 36 is supplied to the television voice carrier signal and the second selective contact SP2 supplied to the first selective contact SP1 according to the logic state of the voice switching control signal applied from the microcomputer 60. The radio voice signal is selected, and the selected signal is supplied to the first and second crystal oscillators 38 and 40 via the reference contact RP, the resistor R1, and the capacitor C1. When the voice switching control signal from the microcomputer 60 has a high logic, that is, when the user selects a television signal, the control switch 36 receives the television voice carrier signal supplied to the first selective contact SP1. Choose. On the contrary, when the voice switching control signal from the microcomputer 60 has a low logic, that is, when the user wants to listen to a radio broadcast signal, the control switch 36 is supplied to the second selective contact SP2. Selects the radio audio signal. The first quartz generator 38 filters the television sound carrier signal and the radio sound signal from the reference contact RP of the control switch 36 introduced through the resistor R1 and the capacitor C1. The television sound carrier signal is detected and the detected television audio broadcast wave signal is supplied to the second speech detector 42. The second crystal oscillator 40 also filters the television sound carrier signal and the radio sound signal from the reference contact RP of the control switch 36 introduced through the resistor R1 and the condenser C1. To detect the radio speech signal and supply the detected radio speech signal to the second speech detector 42.

As a result, the first crystal oscillator 38 outputs the television audio carrier signal to the second speech detector 42 only when the control switch 36 selects the television audio carrier signal supplied to its first selective contact SP1. And the second crystal oscillator 40 supplies the filtered radio sound signal only when the control switch 36 selects the radio sound signal supplied to its second selective contact SP2. It is supplied to the voice detector 42. The second voice detector 42 is a filtered radio voice signal and television carrier from the first and second crystal oscillators 38 and 40 according to the logic state of the voice switching control signal applied from the microcomputer 60. The signal is transmitted to the second amplifier 44 as it is or the frequency of the filtered television carrier signal is demodulated to generate a television audio signal, and the generated television audio signal is supplied to the second amplifier 44. That is, when the voice switching control signal from the microcomputer 60 has a high logic, that is, when the user selects a television broadcast signal, the second voice detector 42 flows in from the first crystal oscillator 38. The television audio carrier signal is frequency-decimated to generate a television audio signal, and the generated television audio signal is supplied to the second amplifier 44.

On the contrary, when the voice switching control signal has a low logic, that is, when the user selects a radio broadcast signal, the second voice detector 42 receives a radio voice signal flowing from the second crystal oscillator 40 as a second. Transmit to amplifier 44. Then, the second amplifier 44 amplifies the radio voice signal and the television voice signal from the second detector 42 and transmits the power-amplified radio voice signal and the television voice signal through the speaker 46.

A television receiver having a time display function according to an embodiment of the present invention further includes a band pass filter 48 for introducing an intermediate frequency signal generated by the second tuner 30. The band pass filter 48 filters an intermediate frequency signal from the second tuner 30 to detect a time information carrier signal included in the intermediate frequency signal, and converts the detected time information carrier signal into a third amplifier 50. Supplies). To this end, the band pass filter 48 includes three capacitors C2 to C4 and an inductor L1. The third amplifier 50 amplifies the detected time information carrier signal from the band pass filter 48 to supply the amplified time information carrier signal to the third crystal oscillator 52. The third crystal oscillator 52 filters the amplified time information carrier signal from the third amplifier 50 to remove noise signals of high frequency components and low frequency components included in the amplified time information carrier signal. The time information carrier signal from which the noise signal is removed is supplied to the data detector 54.

The data detector 54 detects the filtered time information carrier signal from the third crystal oscillator 52 to generate time data in a linear form having information on hours and minutes and relays the generated time data. Supply to the unit 56 and the automatic gain controller (58). The data relay 56 amplifies and buffers time data from the data detector 54 and supplies the amplified and buffered linear data to the microcomputer 60 in accordance with a clock pulse sequence. In addition, the automatic gain controller 58 for introducing the time data from the data detector 54 generates a gain control signal having a different voltage level according to the amplitude size of the time data. 30, the gain of the intermediate frequency signal output to the second tuner 30 is kept constant.

In addition, the microcomputer 60 included in the television receiver having time display according to an embodiment of the present invention displays parallel numeric data corresponding to serial new data from the data relay unit 56. It is supplied to the eastern portion 62 so that the display mechanism driving portion 62 drives the indicator 64 made of seven segments according to the numeric data so that the current hour and minute is displayed. The microcomputer 60 transmits the character and numeric data for the radio carrier frequency designated by the user to the display driving unit 62 instead of the numeric data for the hour and minute for a predetermined time whenever the user changes the radio broadcasting frequency. And supply the drive mechanism 62 to drive the indicator 64 so that the radio broadcast frequency is displayed. The microcomputer 60 applies a tuning control signal having a voltage having a level corresponding to the changed broadcasting frequency to the second tuner 30 whenever the user changes the radio broadcasting frequency and the first voice detector 34. The voltage level of the tuning control signal applied to the second tuner 30 is finely adjusted according to the amplitude of the demodulated radio sound signal from the < RTI ID = 0.0 >

In addition, the microcomputer 60 changes the television broadcasting channel by applying a tuning control signal having a voltage of a level corresponding to the channel designated by the user to the first tuner 24 whenever the user changes the television broadcasting channel. . Further, the microcomputer 60 applies a high logic voice switching control signal to the control switch 36 and the second voice detector 42 when the user selects the TV broadcasting reception mode so that the television voice signal is received. To be transmitted through the speaker 46. On the contrary, when the user selects the radio broadcast reception mode, the microcomputer 60 applies a low logic voice switching control signal to the control switch 36 and the second voice detector 42 so that the radio voice signal is a speaker. To be transmitted through (46).

As described above, the television receiver having the time display function of the present invention further includes a circuit capable of separating the time information included in the radio broadcast signal transmitted from the radio station and displaying the separated time information. It provides the advantage of notifying the user. In addition, the television receiver with time display function of the present invention further includes a circuit for receiving a radio broadcast signal and a switching means for switching the radio sound signal and the television sound signal, thereby allowing a user to receive the radio broadcast signal and the television broadcast. It offers the advantage of selectively enjoying the signal.

Claims (6)

1. TV voice receiving means for receiving a television broadcast signal through an aerial to generate a television voice signal, radio and time receiving means for receiving a radio broadcast signal through an aerial to generate radio voice signals and time data; Switching means for selectively switching the television audio signal and the radio audio signal toward a speaker, and control means for controlling the switching means by supplying a predetermined logic signal to the switching means in accordance with the selection of the television voice or the radio voice. And display means comprising seven segments for displaying time and minutes driven by a display driving portion which is converted into numerical data in parallel form by the control means and is inputted by the control means. Time indicator, characterized in that provided with A television receiver having a. 2. The tuning means according to claim 1, wherein the radio and time receiving means tunes a high frequency signal carrying a radio broadcast signal received through an aerial line and frequency-converts the tuned high frequency reception signal to generate an intermediate frequency signal. Radio speech demodulation means for generating a speech signal by separating and demodulating the radio speech broadcast wave signal from the intermediate frequency signal from the apparatus and supplying the generated radio speech signal to the switching means, and time information broadcasting wave from the intermediate frequency signal from the tuning means. Time information detecting means for separating the signal, and data demodulating means for demodulating the time information broadcast wave signal detected by the time information detecting means to generate serial time data and supply it to the display means. A television receiver having a time display function. 3. The apparatus according to claim 2, further comprising filtering means connected between said time information detecting means and said data demodulating means to remove noise signals of high frequency components and low frequency components included in said time information carrier signal. A television receiver having a time display function. 4. A television receiver having a time display function according to claim 3, further comprising buffer means connected between said data demodulation means and said display means to buffer said demodulated time data. The gain of the intermediate frequency signal generated by the tuning means is controlled by controlling the gain of the tuning means according to the amplitude magnitude of the demodulated time data connected between the data demodulating means and the tuning means. A television receiver having a time display function, further comprising an automatic gain adjusting means for maintaining the size. 3. The radio frequency demodulation means according to claim 2, wherein said radio speech demodulation means comprises: an intermediate frequency processing means for detecting a radio speech carrier signal from an intermediate frequency signal from said tuning means, and a radio speech carrier signal from said intermediate frequency processing means; And a voice detection means for demodulating and generating a radio voice signal and supplying the radio voice signal to the switching means.