KR19980056074A - Television receiver with alarm function for incorrect external device connection - Google Patents

Abstract

The present invention relates to a television receiver having an alarm function for a wrong connection of an external device to notify a user of a wrong connection by outputting a predetermined message to the user when the external device is erroneously connected, and processing a video signal received by an antenna. An image processor for outputting signals and luminance signals, an A / V connection terminal for receiving video and audio signals supplied from an external A / V device, and a signal applied through the A / V connection terminal according to a predetermined control signal; An A / V switching unit for selectively switching the broadcast signal received and processed by the antenna, a synchronization signal detection unit detecting a signal output from the audio output terminal of the A / V switching unit, and detecting a synchronization signal according to a predetermined control signal An OSD generator for outputting an OSD pattern signal and a blanking signal for outputting a warning message about an external device misconnection, to the image processor. A controller for mixing and outputting the hue signal and the luminance signal outputted from the control unit, the pattern signal and the blanking signal output from the OSD generator, and a control unit for driving and controlling the OSD generator based on a detection signal from the synchronization signal detection unit. Characterized in that configured to include.

Description

Television receiver with alarm function for incorrect external device connection

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly, to a television receiver having an alarm function for a wrong connection of an external device that is notified of a misconnection by outputting a predetermined message to the user when the external device is connected incorrectly.

Some television receivers (hereinafter, referred to as TV receivers) currently on the market are configured to perform more various and comprehensive functions by connecting to an external device such as a VCR. It is a block diagram showing the main components of a general TV receiver equipped with a function.

In Fig. 1, reference numeral 1 denotes an antenna for receiving an airwave broadcasting signal, 2 denotes a tuner for tuning the broadcast signal received by the antenna 1, and 3 denotes an intermediate frequency signal output from the tuner 2; IF amplifier that amplifies (IF signal).

Also, reference numeral 4 denotes P / S separation, for example, consisting of a surface acoustic wave filter (SAW FILTER) for separating the IF signal output from the IF amplifier 3 into an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF. 5 is a video signal detector for detecting a video signal from the video intermediate frequency signal separated and output from the P / S separation unit 4, and 6 is an audio intermediate output from the P / S separation unit 4; An audio signal detector for detecting an audio signal from a frequency signal.

On the other hand, reference numeral 7 is a remote control device for the viewer to adjust the output volume or to remotely control the whole other device, 8 is to receive the infrared signal transmitted from the remote control device 7 and converts it into an electrical signal The receiving unit 9 is a microcomputer as a control unit which controls the whole apparatus in accordance with the contracted code signal output from the receiving unit 8, and 10 is a video (V; video) and an audio (R) output from an external device, for example, a VCR. A / V connection terminal 11 for receiving a Right, L; Left signal, 11 is a signal received and processed by the antenna 1 according to a predetermined switching control signal from the microcomputer 9 and the A / V connection A / V switching unit for selectively switching the signal applied into the TV via the terminal 10, 12 is not shown for the audio signal output from this A / V switching unit 11, but from the micom (9) Predetermined control scene The voice processing unit for processing the base, treble, volume control, etc., 13 amplifies the audio signal processed by the voice processing unit 12 and outputs to the speaker 14 connected to the rear stage It is wealth.

Although not illustrated, reference numeral 16 may be used to indicate the brightness, tint, and color of the image signal output from the A / V switching unit 11 according to a predetermined control signal from the microcomputer 9. ) Is an image processing unit which outputs R (Red), G (Green), B (Blue) and luminance (Y) signals corresponding to the image signal by processing the adjustment, etc., and 18 denotes the R output from the image processing unit 16. A CRT driving unit for driving a CRT (Cathode-ray Tube) connected to the rear stage based on the G, B and luminance (Y) signals.

That is, in the conventional TV receiver having the above-described configuration, when the viewer selects the operation mode through the remote controller 7 or the like, the microcomputer 9 switches the A / V switching unit 11 to control the tuner. The broadcast signal selected and processed by (2), i.e., either the RF signal side or the video and audio signals applied to the inside of the TV receiver via the A / V connection terminal 10, i.e., the A / V signal side, are selectively selected. Switch to output through the CRT 19 and the speaker 14.

Recently, as the function of the TV receiver has become more multifunctional, the number of external device connection terminals installed in the TV receiver has increased greatly. If a user is not careful when connecting an external device, problems such as a breakdown of the circuit may occur due to breakage of the circuit. Done.

On the other hand, in the case of a VCR, which is most commonly connected to a TV receiver among external A / V devices, a video input terminal and a sound input terminal are sometimes changed and connected. In this case, a high-frequency video signal is processed and a speaker When the external audio signal such as over modulation or the like is applied through the video signal input terminal and amplified and output, damage to the device and noise may occur.

The present invention has been made in view of the above-described circumstances, and provides a television receiver having an alarm function for a wrong connection of an external device to notify a user of a wrong connection by automatically outputting a predetermined message to the user when the external device is connected incorrectly. The purpose is.

1 is a block diagram showing a conventional general television receiver equipped with an external device connection function.

2 is a block diagram showing an internal configuration of a television receiver having an alarm function for incorrect connection of an external device according to an embodiment of the present invention;

Explanation of symbols on the main parts of the drawings

1 antenna 2 tuner (TUNER)

3: IF amplification unit 4: P / S separation unit

5: Image signal detector 6: Voice signal detector

7: remote control unit 8: receiving unit

9: Microcomputer 10: A / V connection terminal

11: A / V switching unit 12: voice processing unit

13: voice amplifier 14: speaker

16: image processing unit 18: CRT driving unit

19: CRT (Cathode-ray Tube) 20: Synchronization signal detector

21: OSD generator 22: Mixer (MIXER)

In order to realize the above object, a television receiver having an alarm function for a wrong connection to an external device according to the present invention processes an image signal received by an antenna and outputs a color tone signal and a luminance signal, and an external A / V device. A / V connection terminal for receiving the video and audio signals supplied from the A / V connection terminal, and A / V selectively switching the signal applied through the A / V connection terminal and the broadcast signal received and processed by the antenna according to a predetermined control signal. A V switching unit, a synchronization signal detecting unit detecting a signal output from the audio output terminal of the A / V switching unit and detecting a synchronization signal, an OSD pattern signal for outputting a warning message for a connection error of an external device according to a predetermined control signal; OSD generator for outputting blanking signal, color tone signal and luminance signal outputted from the image processor, and panel outputted from OSD generator And a signal mixer for mixing outputs a blanking signal, and based on the detection signal from the synchronization signal detection to a controller which drives and controls the OSD generator is characterized in that configured.

That is, according to the present invention having the above-described configuration, it is possible to prevent damage to a circuit and a noise output phenomenon that may occur when an external device is misconnected.

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

FIG. 2 is a block diagram illustrating an internal configuration of a television receiver having an alarm function for incorrect connection of an external device according to an embodiment of the present invention. Components that perform substantially the same functions as those shown in FIG. The same reference numerals are used, and detailed description thereof will be omitted.

In FIG. 2, reference numeral 20 denotes a synchronization signal detection unit for detecting a signal output from the audio output terminal of the A / V switching unit 11 to detect a synchronization signal, and reference numeral 21 denotes a predetermined control from the microcomputer 9. OSD output device that outputs OSD pattern signal (R ', G', B ') and blanking signal (Y') corresponding to the message in order to output warning message about error of external device according to signal. Numeral 22 denotes color tone signals R, G, and B outputted from the image processor 16, luminance signals Y, and pattern signals R ', G', and B 'outputted from the OSD generator 21. FIG. And a mixer for mixing and outputting the blanking signal Y '.

Next, the operation of the device having the above configuration will be described.

If the user executes tape playback while changing the video output terminal of the VCR to the audio input terminal of the TV receiver and the audio output terminal to the video input terminal, respectively, for example, the A / V connection terminal 10 The reproduced video signal is input to the audio processing unit 12 through the A / V switching unit 11 and the reproduced audio signal is input to the image processing unit 16, respectively. The synchronization signal is detected by detecting a signal output through the voice output terminal of the switching unit 11.

On the other hand, when the synchronization signal of the predetermined frequency band is detected by the synchronization signal detection unit 20, the synchronization signal detection unit 20 outputs a high level detection signal to the microcomputer 9, for example, the detection of the high level. The microcomputer 9 receiving the signal outputs a predetermined control signal to output a predetermined guide message for guiding a misconnection situation to the OSD generator 21.

As a result, the OSD pattern signal (R ', G', B ') and the blanking signal (Y') for outputting the guide message is output from the OSD generator 21, the signal is processed by the image processor 16 The mixed signal and the output signal is output through the CRT 19 through the CRT driving unit 18, and thus a predetermined guide subtitle indicating that the external A / V device is connected incorrectly is output on the screen.

That is, according to the above embodiment, it is possible to realize a television receiver having an alarm function for the wrong connection of an external device, which is configured to notify the user of a false connection by outputting a predetermined message to the user when the external device is connected incorrectly.

Meanwhile, the present invention is not limited to the above embodiments and can be variously modified within the scope not departing from the technical gist of the present invention.

As described above, according to the present invention, it is possible to prevent damage to a circuit and a noise output phenomenon that may occur when an external device is incorrectly connected.

Claims (1)

An image processor which processes an image signal received by an antenna and outputs a color tone signal and a luminance signal; A / V connection terminal for receiving video and audio signals from external A / V equipment, An A / V switching unit for selectively switching a signal applied through the A / V connection terminal and a broadcast signal received and processed by an antenna according to a predetermined control signal; A synchronization signal detector for detecting a signal output from the audio output terminal of the A / V switching unit and detecting a synchronization signal; An OSD generator for outputting an OSD pattern signal and a blanking signal for outputting a warning message on a connection error of an external device according to a predetermined control signal; A mixer for mixing and outputting a color tone signal and a luminance signal output from the image processor and a pattern signal and a blanking signal output from the OSD generator; And a control unit configured to drive and control the OSD generator on the basis of the detection signal from the synchronization signal detection unit.