KR19990021594U - Computer screen monitor using TV with storage function - Google Patents

Abstract

The present invention relates to a computer screen monitoring apparatus using a television, the purpose of which is that the viewer (guardian) of the television in order to check in real time whether the computer screen viewed by the computer user (guardian) is an educationally harmful scene in the same way as the computer screen image The image is displayed on a television screen and, in particular, the screen is saved.

To this end, as an ordinary television, an interface unit 50 for connecting a terminal for outputting a video signal from a main circuit of a computer to a computer monitor, and an image processing unit 60 for processing the video signal, and a storage means for storing the video signal. The video deck 74 or the memory unit 73 is further provided. If the storage means is controlled so that the computer video signal is recorded and stored only for a partial time by using the timer 71 in which the microprocessor 70 of the television is built in, the educational computer video screen monitoring can be effectively performed.

Description

Computer screen monitor using TV with storage function

The present invention relates to a television having a storage function connected to another device, and more particularly, a television having a storage function of a video signal is connected to display a video screen of a computer so that the computer screen can be stored and monitored. It's about TV.

Displaying a computer image on a computer monitor and simultaneously on a television monitor (a water pipe) has the advantage of viewing a computer image on a large television screen. Prior art for this purpose, there is Korea Patent Publication No. 97-57001, which will be described with reference to Figure 1 as follows.

1 is an antenna for receiving a broadcast signal; A tuner 10 for tuning one broadcast signal among the broadcast signals received by the antenna; A voice output unit 20 for demodulating a voice signal from the broadcast signal input from the tuner and outputting the voice signal using the voice signal; An intermediate frequency amplifier and image detector 30 for amplifying a broadcast signal input from the tuner to an intermediate frequency and then detecting and outputting an image signal therefrom; A Y and C signal separator 40 for separating and outputting a luminance signal and a composite video signal from an image signal input from the intermediate frequency amplification and image detection; A luminance signal and a composite video signal generated by converting a digital signal input from an external computer into an analog signal and using the same, a video signal and a smooth video signal input from an external video signal source, and Y and C described above. A signal interface unit 50 for selecting and outputting one of a luminance signal and a composite video signal input from the signal separation unit 40; The video output unit 60 generates a synchronization signal, a luminance signal, and a color signal from the video signal input from the signal interface unit, and displays the image on the screen by using the same.

The interface unit 50 includes a video signal input unit 51 for shaping and outputting a digital signal input from a computer; A D / A converter and an NTSC encoder 52 which converts the digital signal input from the video signal input unit into an analog signal and then encodes the digital signal into an NTSC luminance signal and a composite video signal; And a Y and C signal switch unit 53 having an input terminal connected to the S-VHS signal line from the D / A converter and the NTSC encoder, the Y and C signal separation unit, and an external video signal source. do.

That is, by adding a D / A converter and an NTSC encoder 52 to a television that receives a video signal only from a tuner or an external video device, and connecting it to a computer, computer images can be monitored on a television.

By the way, it is possible to confirm in real time through the TV whether the educationally harmful video screen is displayed on the computer monitor in the same configuration as the prior art, but the educator (guardian) may not always see only the computer video screen. That is, there is a problem that the above configuration alone does not sufficiently achieve the purpose of computer screen monitoring.

The present invention for solving the above problems is to provide a television device capable of effectively monitoring educational computer screen by connecting the television to display a computer image screen and at the same time storing the video signal. The purpose is.

1 is a block diagram of a television receiver capable of displaying a conventional computer screen.

2 is a block diagram of a television having a storage function for monitoring a computer screen according to the present invention.

Explanation of symbols on the main parts of the drawings

50: interface unit 52: D / A converter and NTSC decoder

53: Y, C signal switch unit 60: image processing unit

70: microprocessor 71: timer

72: key input unit 73: memory unit

74: video deck

A feature of the present invention for achieving the above object is a television comprising: a microprocessor 72 for controlling various operations; A video signal input unit 51 for shaping and outputting a digital video signal input from a computer; A D / A converter and an NTSC encoder 52 which converts the digital signal input from the video signal input unit into an analog signal and then encodes the digital signal into an NTSC luminance signal and a composite video signal; An image processor 60 for generating a luminance signal and a color signal from the computer image signal input from the D / A converter and the NTSC encoder and displaying the image on the screen by using the same; And predetermined storage means (60, 73) capable of storing the computer image signal under the control of the microprocessor (72).

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

2 schematically shows a configuration of a television having a storage function for monitoring a computer screen according to the present invention, a tuner 10 for tuning over-the-air broadcasting, a circuit 20 for processing an audio signal, and an image. An image processor 60 for processing a signal and outputting it to an image tube, a D / A converter and an NTSC encoder 52 connecting the image processor and an external computer, a synchronization signal processor 61, and a timer 71. The built-in microprocessor 70, the key input unit 72, the memory unit 73 as a storage means, and the video deck 74 are shown.

The image processing unit 60, the Y, C signal separation unit 40 for separating and outputting the luminance signal (Y) and the composite video signal (C) from the detected video signal and the image signal from an external computer is analyzed The video signal converted into a log signal is also separated into a luminance signal and a composite video signal. It is well known that a Y and C signal switch unit for outputting one of the two image signal sources to the water pipe is required.

Of the storage means, the video deck 72 may be used by connecting a conventional VTR. Also in the present invention, the recording operation control of the video deck 72 is made by the microprocessor 70. The video signal from the computer is stored in the video deck 72 via the D / A converter and NTSC encoder 52 and the image processor 60.

The memory unit 73 also stores an image signal in the form of a digital code under the control of a microprocessor, and may replace the video deck 72. In this case, the D / A converter can be omitted, so that the data is transferred as it is, as it is, through the connection cable (line) and the data line of the microprocessor.

When the video signal is stored in the memory unit 73 in a digital form, the amount of screen information data for one second is 160 Mbit in the case of 30 frames and 480 scan lines. It is preferable to limit the time zone.

In addition to the moving picture compression protocol (for example, MPEG), a still picture compression protocol (for example, JPEG) is sufficient to achieve the educational computer screen monitoring aimed at by the present invention. In addition to the video compression technique, it is preferable to record only the partial time.

Recording only the partial time may be performed by the microprocessor 70 using the timer 71 as set by the user through the key input unit 72. The user is set to store only a few seconds at an hour, and it is desirable to be able to randomly set for each time zone.

The present invention configured as described above has the effect of enabling the guardian to monitor for education by allowing the guardian to view the computer screen stored on the television. In particular, since the guardian can set the storage time arbitrarily, there is an effect that the guardian cannot fool the guardian while consuming little memory.

Claims (2)

A television comprising: a microprocessor 72 for controlling various operations; A video signal input unit 51 for shaping and outputting a digital video signal input from a computer; A digital / analog (D / A) converter and an NTSC encoder which converts the digital signal input from the video signal input unit into an analog signal and then encodes the digital signal into a luminance signal and a composite video signal of a broadcast standard (NTSC) method. 52); An image processor 60 for generating a luminance signal and a color signal from the computer image signal input from the D / A converter and the NTSC encoder and displaying the image on the screen by using the same; And a predetermined storage means for storing the computer image signal under the control of the microprocessor (72), so that the computer screen can be monitored. The television set as claimed in claim 1, wherein the microprocessor (70) can monitor a computer screen by storing only a partial time in controlling the computer image signal to be stored in the storage means.