KR19990047971A - Television receiver with door phone which can confirm visitor and method - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver capable of confirming an image of a visitor visiting a front door using a PIP function.

When the visitor presses the call key provided in the door phone, the TV detects this and supplies the main power to watch the video signal, and supplies power to the camera installed in the door door to drive the camera to display the visitor's image. Photographing and PIP processing are performed, and the image signal of the PIP-processed visitor is displayed on the CRT of the television so that the visitor can be confirmed.

Description

Television receiver with door phone which can confirm visitor and method

The present invention relates to a television receiver capable of confirming a visitor and a control method thereof, and more particularly, to a television receiver having a door phone capable of confirming an image of a visitor visiting a front door using a picture in picture (PIP) function and a method thereof. .

In general, the home automation system detects when a visitor presses a call button of a door camera installed at the front door and generates a call ring. When the call ringer hears the handset of the video door phone in the room, the image of the visitor is displayed on the monitor. There was a function to display. This function is more convenient than a simple interphone, but the screen is small. Especially, while watching a TV, the indoor user has to move to a location where a video door phone is installed. In order to use a video door phone and a TV, Since the TV must be provided separately, there is a problem in that the purchase cost is increased.

Accordingly, an object of the present invention is to provide a television receiver having a door phone and a method thereof capable of confirming a visitor image of a front door using a PIP function.

It is another object of the present invention to provide a television receiver having a door phone and a method thereof, which can be used as a video door phone in a television, thereby reducing the cost of separate purchase of the video door phone and the television.

1 is a block diagram of a television receiver having a door phone according to an embodiment of the present invention

2 is a flowchart for controlling a visitor image on a screen of a television according to an embodiment of the present invention.

1 is a block diagram of a television receiver having a door phone according to an embodiment of the present invention.

The door phone 10 has a call key 11, a camera 12, a speaker and a microphone (not shown). The call key 11 is installed at the entrance to generate a call key signal when the visitor presses. The camera 12 receives power and outputs a video signal by capturing an image of the visitor. The call detection unit 14 receives a call signal input when the call key 11 is pressed and outputs a call detection signal. The control unit 20 outputs a camera power supply control signal, a main power supply control signal and a PIP drive control signal when a call detection signal is input from the call detection unit 16, and generates a CRT drive signal and a ring according to whether the TV is used. Output a control signal. The camera power control unit 16 is installed at the front door or the main door to supply power to the camera 12 by a camera power supply control signal output from the control unit 20. Under the control of the controller 10, the call hybrid circuit 18 transmits and receives a voice signal to form a call between the visitor and the person in the home in response to the call button 10 being pressed. The ring oscillator 22 generates a ring by the ring generation control signal of the controller 20 and provides the ring 26 to the phone 26. In response to the ring tone signal generated by the ring oscillator 22, the telephone 26 makes a call with the visitor through the door phone 10 installed at the front door by lifting the handset. The telephone detecting unit 24 detects the use of the telephone according to the state of the handset of the telephone 26 and outputs a detection signal to the control unit 20. The PIP driver 28 receives the visitor image signal captured by the camera 12 and processes the PIP image by the PIP driving control signal of the controller 20. The image processing and CRT driver 30 processes the image signal and the PIP image signal transmitted from the broadcasting station and received through an antenna and tuner (not shown) to be displayed on the CRT. The timer 34 counts time under the control of the controller 20. The standby power unit 38 receives the AC input power, drops the voltage, and converts the DC into DC to provide the standby power to the control unit 20 and the call detection unit 14. The main power control unit 40 has a transistor TR connected with a base connected to the port P6 of the control unit 20, and a coil CO1 is connected between the collet of the transistor TR and the standby power supply unit 38, and is connected to one end of an AC input power to supply current to the coil CO1. It consists of a relay RY1 having a switch SW1 which is switched on when supplied and supplies AC power to the main power supply 36. The main power supply unit 36 supplies main power to the television receiver as the relay RY1 is driven.

2 is a flowchart for controlling a visitor image on a screen of a television according to an exemplary embodiment of the present invention.

1 to 3 will be described in detail the operation of the preferred embodiment of the present invention.

When the visitor presses the call key of the door phone 10 installed at the front door, the controller 20 checks whether a call is detected from the call detection unit 14 in step 101. If the call is detected, the process proceeds to step 102 and the control unit 20 checks whether the TV is currently being used and proceeds to step 104 if the TV is in use. However, if the TV is not in use, in step 103, the controller 20 outputs a main power supply control signal, for example, a high signal, through the port P6. The high signal output through the port P6 of the controller 20 is applied to the base of the transistor TR to turn on the transistor TR. When the transistor TR is turned on, a current flows in the coil CO1 of the relay RY1. As a result, the switch SW1 is turned on to apply the AC input power to the main power supply 36. Therefore, power is supplied to the TV so that the broadcast can be watched. Then, in step 104, the controller 20 controls the camera power controller 36 to supply power to the camera 12. In step 105, the controller 20 outputs the PIP driving control signal through the port P10 to the PIP driver 28, and the PIP driver 28 processes the visitor image by the PIP image and outputs it to the image processing CRT driver 30. Then, in step 106, the controller 20 outputs an image processing CRT driving signal and applies it to the image processing and CRT driving unit 30. Accordingly, the image processing and CRT driver 30 displays the image signal PIP-processed from the PIP driver 28 on the CRT 32. Then, in step 107, the controller 20 checks whether the user picks up the handset of the telephone 26 from the telephone detector 24 and detects a hook-off. In this case, if the handset is detected to be in the hook-off state, the controller 20 proceeds to step 108 to stop the occurrence of the ring by controlling the ring oscillator 22 and to control the call hybrid circuit 18 to connect the call path to form a call between the phone 26 and the visitor. do. Thereafter, in step 109, if the hook-on state is detected from the phone detecting unit 24, the process proceeds to step 110. In step 110, the control unit 20 checks whether the TV is in use and proceeds to step 111 if the TV is not in use. In step 111, the controller 20 outputs a PIP off control signal to the PIP driver 28. Then, the PIP driver 28 blocks the output of the visitor image signal captured by the camera 12 to the image processing and the CRT driver 30. In operation 112, the controller 20 outputs the camera power and the main power off signal to control the camera power controller 16 and the main power driver 40 to cut off the power supplied to the camera 12 and the main power of the TV. In addition, in step 113, the controller 20 controls the call hybrid circuit 18 to block the call path. However, if the TV is in use in step 110, the controller 20 proceeds to step 114 and outputs a PIP off control signal to the PIP driver 28. Then, the PIP driver 28 blocks the output of the visitor image signal captured by the camera 12 to the image processing and the CRT driver 30. In operation 114, the controller 20 outputs a camera power off signal to control the camera power controller 16 to cut off the supply of power to the camera 12. Also, in step 116, the controller 20 controls the call hybrid circuit 18 to block the call path.

As described above, according to the present invention, a home automation function is added to a television to display a visitor's image on a large screen of the television when the visitor presses the call key of the door phone while watching TV. There is an advantage that can be surely confirmed the visitor can be reproduced.

In addition, in order to use a video door phone and a TV, a video door phone and a TV having separate installations have the advantage of reducing costs by using a video door phone function on the television.

Claims (3)

A television receiver having a door phone capable of confirming visitors, A door door phone installed at the front door and having a call key for generating a call key signal when the visitor is pressed, and a camera for receiving a power supply to take a picture of the visitor and output a video signal; A call detection unit receiving a call signal from the door phone and outputting a call detection signal; When a call detection signal is input from the call detection unit, a camera power supply control signal, a main power supply control signal and a PIP drive control signal of a television receiver are output, and a CRT drive signal and a ring generation control signal are output depending on whether a television is used. With a control unit A camera power control unit installed at a front door or a door and supplying power to the camera by a camera power supply control signal output from the control unit; A call hybrid circuit for transmitting and receiving a voice signal to form a call between a visitor and a person in the home in response to the call key being pressed under the control of the controller; A ring oscillator for generating a ring by a ring generation control signal of the controller and providing the ring to a telephone; A telephone for making a call with the visitor through the door door phone installed at the entrance by lifting the handset in response to the ring tone signal generated from the ring oscillator; A phone detector for detecting whether a phone is used according to a state where the handset of the phone is placed and outputting a detection signal to the controller; A PIP driver which receives a visitor image signal photographed from the camera and processes a PIP image by a PIP driving control signal of the controller; An image processing and CRT driver for processing the broadcast video signal and the PIP video signal to be displayed on the CRT; A standby power unit which receives AC input power and drops the voltage and then converts it into DC to provide standby power to the control unit and the call detection unit; And a main power control unit configured to supply main power of the television by a main power control signal output from port P6 of the control unit. A method of displaying a visitor image on a television receiver having a door phone capable of confirming a visitor, Supplying the main power of the television when there is a call from the door phone by the visitor; Supplying power to a camera installed in the entrance door phone in a state in which the main power of the television can be supplied to view a video signal; Supplying power to the camera to take a picture of the visitor and process the PIP; And displaying the video signal of the PIP-processed visitor on the CRT of the television. The method of claim 2, And displaying the visitor image on the CRT of the television and then connecting the call path to form a call when hooking off the handset of the telephone. How to display.