KR19990026309U - Video phone video display device using TV's simultaneous display circuit - Google Patents

Abstract

The present invention relates to a video phone video display device that can automatically store and display the visitor's video in the internal storage device even if there is no person in the house by connecting the video phone to an external device connecting terminal of the TV. Videophone connection for connecting the visitor image transmitted from the videophone 21 to the inside of the TV main body 10 by simultaneously connecting the external device connecting terminal of the television to display the broadcast video signal and the videophone video signal on the television screen. A terminal 24, a signal discrimination circuit 5 for discriminating the presence or absence of a visitor image signal and outputting it as a digital signal, and simultaneously receiving a broadcast video signal and a visitor image signal and displaying them on a TV picture tube 16 simultaneously. A simultaneous image circuit 7 for storing the image, a storage device 7b for recording and reading the visitor image signal, and a visitor image from the signal discrimination circuit 5 The visitor image signal is stored in the storage device 7b when a discrimination signal indicating the presence of a call is input. The visitor image signal stored in the storage device 7b is read out when the visitor confirmation signal is input. It characterized in that it comprises a control device (6) for editing to display.

Therefore, the present invention can check the appearance of the visitor through the TV even when the user is out of the office can not only expand the functions of the conventional videophone and TV, but also increase the convenience of life.

Description

A videophone video display device using a simultaneous display circuit of a television.

The present invention relates to a PIP circuit of a television. In particular, the videophone can be connected to an external device of a television to automatically store and display a visitor's image in the internal memory even when there is no person in the house. An image display apparatus is provided.

In general, a videophone installed at the door of an apartment or detached house is a device that checks the identity of the visitor in the house. In other words, when the visitor presses the doorbell installed outside the door, the camera of the videophone captures the visitor's image and passes it to the videophone receiver in the house through the cable to confirm the impression of the visitor.

If there is a person in the house, the visitor can be checked through the videophone receiver, but if all are out, the visitor cannot be checked. Therefore, the present inventors have developed a device capable of capturing an image of a visitor when the visitor visits while the user is all out and remembering it and later displaying it on a TV CRT.

In other words, the recent TV is equipped with a picture in picture (PIP) circuit that can display not only the broadcast video but also the video of an external device on the screen at the same time, so that the function of the videophone can be greatly expanded. I came to mind.

The purpose of the present invention based on this idea is that if there is no person in the house where the video phone is installed, the visitor comes to operate the video phone and confirms that there is no owner. It's about making it look.

In order to achieve the above object, the present invention connects the video phone 21 to an external device connection terminal of a television, and simultaneously transmits a video signal and a video phone image signal on a television screen, and transmits the video phone 21 from the video phone 21. A video phone connection terminal 24 for introducing the visitor image into the TV body 10, a signal discrimination circuit 5 for discriminating the presence or absence of the visitor image signal, and outputting it as a digital signal; A simultaneous picture circuit 7 for simultaneously receiving a visitor picture signal and displaying it on a TV picture tube 16, a storage device 7b for recording and reading the visitor picture signal, and the signal discrimination circuit 5; The visitor image signal is stored in the storage device 7b when a discrimination signal indicating the presence of the visitor picture signal is inputted, and stored in the storage device 7b when the visitor confirmation signal is inputted. The read image signal to the visitor is characterized in that it comprises a control device (6) for editing to be displayed simultaneously with the broadcast video signal.

Other objects and advantages of the present invention will be described below and will be appreciated by the embodiments of the present invention. In addition, the object and advantages of the present invention can be realized by means and combinations shown in the appended utility model registration claims.

1 is a block diagram illustrating an internal circuit of a television having a video phone video display device according to the present invention.

2 shows an initial screen of a television when there is a visitor's visit.

3 illustrates a state in which a plurality of visitors are outputted on the main screen.

4 illustrates a state in which a broadcast video signal is multiplexed on a sub-screen and a video phone video signal on a main screen.

5 is a flowchart illustrating a control process of the microcontroller according to the present invention.

* Explanation of symbols for main parts of the drawings

3: main screen switching circuit 4: sub-screen switching circuit

5: signal discrimination circuit 6: microcontroller

7: Simultaneous Screen Circuit 7a: PIP Control Unit

7b: PIP memory 8: power supply

9: Visitor Indicator 11: EPROM

16: CRT 21: Video Phone

22: video phone receiver 23: video signal cable

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

1 illustrates an internal circuit configuration of a TV to which a videophone video display device of the present invention is applied. As shown in Fig. 1, the tuner section 1, the video / audio detection circuit 2, the image amplification circuit 12, the matrix 13, horizontal and vertical deflection circuits included in a conventional color TV internal circuit. 14, 15, the CRT 16, the voice adjusting circuit 17, the voice amplifier circuit 18 and the speaker 19 are all included.

Particularly emphasized in the embodiment of the present invention is the connection terminal 24 of the external device of the TV, the main screen and sub-screen switching circuits (3, 4), simultaneous screen circuit (7), signal discrimination circuit (5) , Microcontroller 6 and power supply 8.

The external device connection terminal 24 is a means for connecting an external device such as a VTR, VCR, video phone, etc. to a TV. In the present embodiment, the video phone connection terminal 24a for branching the video signal cable 23 for transmitting the video signal of the video phone 21 to the video phone receiver 22 and drawing it into the TV interior 10. Is further configured. Therefore, the video signal of the video phone 21 is not only transmitted to the video phone receiver 22 through the connection terminal 24a, but also the main screen and sub-screen switching with the signal discrimination circuit 5 of the TV interior 10. To circuits 3 and 4, respectively.

The signal discrimination circuit 5 outputs a logic high to the microcontroller 6 when it is inputted by discriminating whether or not a video phone image signal is being input through the video phone connection terminal 24a. If not, the signal discrimination means outputs a logic low to the microcontroller 6. The signal discrimination circuit 5 operates normally by the standby power (Stan-By power) supplied from the power supply device 8 even when the operating power of the TV is turned off.

The main screen switching circuit 3 is a means for selecting a video signal to be displayed on the main screen of a television. In this embodiment, a video phone video signal is additionally inputted to an existing broadcast video signal and a video signal of an external device. The main screen switching circuit 3 selects a video signal to be displayed on the main screen from among three or more input video signals according to the control signal of the microcontroller 6. Therefore, when the microcontroller 6 transmits a control signal for selecting the video phone image signal to the main screen switching circuit 6, the switching circuit selects and outputs the video phone image signal among the plurality of input signals.

The sub screen switching circuit 4 also has the same function as the main screen switching circuit 3. The only difference is that the selected image is output to the sub-screen according to the control signal.

The simultaneous picture circuit 7 comprises a PIP controller 7a for appropriately editing the output of the main picture switching circuit 3 and the output of the sub picture switching circuit 4 and a storage device for recording and reading videophone image signals. It consists of (7b). The memory device 7b does not necessarily need to be included in the simultaneous picture circuit 7. The PIP controller 7a of the simultaneous picture circuit 7 is controlled by the microcontroller 6. In addition, the simultaneous picture circuit 7 is normally operated by the standby power supplied from the power supply 8 even when the operating power of the TV is turned off.

The video signal properly edited by the simultaneous picture circuit 7 is displayed on the CRT 16 through the video amplification circuit 12.

The microcontroller 6 recognizes that the video phone image signal is transmitted to the inside of the TV 10 when a logic high is applied from the signal discrimination circuit 5. , 4) apply control signals to select video phone image signals, respectively. Further, a control signal is applied to the PIP control section 7a of the simultaneous picture circuit 7 to set an address in the storage device 7b to store the video phone image signal. Of course, reading, editing, and displaying the videophone image signal stored in the storage device 7b and displaying it on the CRT 16 is a major role of the microcontroller 6 as well. The microcontroller 6 is programmable by the user. In addition, the microcontroller 6 is normally operated by the standby power supplied from the power supply 8 even when the operating power of the TV is turned off.

The power supply device 8 is a device for supplying the operating power to the internal device of the TV, and the standby power supply to the signal discrimination circuit 5, the microcontroller 6, and the simultaneous display circuit 7, respectively, even when the TV is turned off. Supply Stand-By power).

In addition, the visitor indicator 9 is connected to the power supply 8 so that the visitor indicator 9 lights up according to the control signal of the microcontroller 6 and the visitor indicator 9 when the operating power is input. Turn off).

In addition, the microcontroller 6 is connected to the auxiliary storage device 11 to record the visit time and the number of screens, which is the time when the video signal of the video phone is input. The auxiliary memory device comprises an EPROM 11 which can erase stored contents and continue to use them repeatedly.

Looking at the operating state of the present invention made of the above configuration as follows.

First, the video signal cable 23 connected to the video phone receiver 22 from the video phone 21 is connected to the video phone connection terminal 24a of the external device connecting terminal of the TV.

When a visitor presses the doorbell of the videophone 21 in a state where everyone in the house is out (at this time, the TV is turned off), the videophone video signal is input through the videophone connection terminal 24a. The video phone image signal is applied to the signal discrimination circuit 5 so that the signal discrimination circuit 5 outputs a logic high to the microcontroller 6. The microcontroller 6, which has received a logic high, recognizes that there is a visitor and stores the visit time in the EPROM 11. At this time, if the visitor's call is not the first time, the visit frequency is also recorded in the EPROM 11. The number of visits recorded in the EPROM 11 is to determine the number of subsequent screens.

The microcontroller 6 controls to select a videophone picture signal by popularizing the control signals to the main screen and the code face switching circuits 3 and 4, and sends the selected videophone picture signal to a designated address of the PIP memory 7b. Save it.

On the other hand, when the visitor recognizes that there is no person in the house, the video signal of the video phone is stopped by the video phone's auto-off function, and the video phone video signal is not transmitted to the signal discrimination circuit 5 so as to discriminate the signal. The circuit 5 outputs a digital signal indicating that the microcontroller 6 has no image signal (stopping memory operation because the visitor has left). In response to this discrimination signal, the microcontroller 6 stops the control signal for storing the videophone video signal in the PIP memory 7b of the simultaneous display circuit 7. At this time, the microcontroller 6 lights the visitor indicator 9 to indicate to the outside that there is a visitor's call.

The user who returns from the outing sees that the visitor indicator 9 lights up, recognizes that there is a visitor while out, and operates the TV. When the operating power of the TV is applied, the microcontroller 6 turns off the visitor indicator 9 and displays an initial screen (see FIG. 2) indicating that there is a visitor on the CRT 16 along with the visit time.

At this time, when the user applies the visitor confirmation signal with the keys of the remote control and the TV main body, the microcontroller 6 applies a control signal to the simultaneous picture circuit 7 to read an image signal from the PIP memory 7b and to isolate it. Or edited with a broadcast video signal to be output to the CRT 16. This edit form is well illustrated in FIG. 3A shows a form in which two visitor images are edited on the main screen, FIG. 3B shows a form in which four visitor images are multi-edited on the main screen, and FIG. 3C shows a broadcast video signal and eight visitor images on the main screen. 3D shows a form in which 16 visitor images are multiplexed on the main screen.

In addition, FIG. 4 illustrates a state in which a broadcast image is displayed on a main screen and three visitor images are output on a sub screen.

As such, the present invention can display the visitor image simultaneously in the multi-screen function among the simultaneous screen functions in case there are several visitors, and the number of the multi screens is 2, 4, 8, 16, etc. as shown in FIG. It can be displayed.

When the visitor is confirmed through the visitor's image, the cancel command of the visitor confirmation function is input to the microcontroller 6 using the remote control or the key of the TV main body to watch TV, and the microcontroller 6 displays the simultaneous display circuit 7. The main screen and the sub-screen switching circuits 3 and 4 are controlled so as to erase all contents stored in the PIP memory 7b of the present invention and to enable broadcast viewing, which is a TV original function.

A detailed flowchart of the control process of the microcontroller described above is shown in FIG. 5. Referring to this, it will be easier to understand the configuration and operation of the present invention.

The present invention is not limited to the above-described embodiment, and various modifications within the equivalent scope of the technical concept of the present invention and the utility model registration claims to be described below by those skilled in the art to which the present invention belongs. Of course, variations are possible.

As described above, the present invention can check the appearance of the visitor through the TV even when the user is out of the office, and can expand the functions of the conventional videophone and TV as well as increase the convenience of living. .

Claims (8)

In connecting the video phone 21 to the external device connecting terminal 24a of the television 10 and simultaneously displaying the broadcast video signal and the video phone video signal on the television screen, A video phone connection terminal 24a for introducing a visitor image transmitted from the video phone 21 into the inside of the TV main body 10; A signal discrimination circuit 5 for discriminating the presence or absence of the visitor image signal and outputting it as a digital signal; A simultaneous picture circuit 7 for simultaneously receiving a broadcast video signal and a visitor video signal and simultaneously displaying them on a TV picture tube 16; A storage device 7b for recording and reading the visitor image signal; When the discrimination signal indicating the presence of the visitor image signal is input from the signal discrimination circuit 5, the visitor image signal is stored in the storage device 7b, and when the visitor confirmation signal is input, it is stored in the storage device 7b. And a control device (6) which reads and edits a long character picture signal so that it can be displayed simultaneously with a broadcast picture signal. The method of claim 1, Power supply for supplying standby power (Stand-By power) to these means so that the signal discrimination circuit 5, the simultaneous display circuit 7, and the control device 6 can operate while the television operating power is turned off. A videophone image display device using a simultaneous picture circuit, characterized in that it comprises a device (8). The method of claim 2, When the controller 6 recognizes the visitor image signal, the visitor indicator 9 is turned on to notify the outside, and when the operating power is input to the television, the visitor indicator 9 is turned off. A video phone image display device using a simultaneous picture circuit. The method of claim 2, And a simultaneous display circuit (7) outputs a plurality of visitor images in accordance with a multi-screen function. The method of claim 2, And the visitor confirmation signal is input to the control device (6) through a remote controller or a visitor confirmation key of a TV main body. The method of claim 2, The control device 6 outputs an initial screen informing the visitor of the visitor when the operating power of the television is applied while the visitor image signal is stored in the storage device 7a. Image display device. The method of claim 6, And a secondary storage device (11) for recording the visit time of the visitor in accordance with the control signal of the control device (6), reading it out according to the input of the operating power of the television, and displaying it on the initial screen. Video phone image display using a circuit. The method of claim 7, wherein And an auxiliary programmable read only memory (EPROM) capable of erasing and reusing stored contents.