JPH02298156A - Video doorphone system - Google Patents

Abstract

PURPOSE:To monitor a visitor picture in a moving picture in the video telephone unit by receiving an external signal to the video telephone unit, turning on a power automatically and switching a video signal of an image pickup element built in the video telephone unit to the input for external video signal. CONSTITUTION:A video telephone unit 2 and a camera doorphone 3 are connected by using a video doorphone adaptor 1 to form a video doorphone system able to be connected to a general telephone line. When a call button 3b is depressed, the camera 3a is turned on and a power supply from a feeding circuit 1c is made into a constant voltage independently of the length of a feed control line 5 with a power supply circuit 3e and the power is supplied to the camera 3a. On the other hand, the power supply of the video telephone unit 2 is turned on, then the video control circuit 2b is connected to the video line 4 receiving an external video signal from the camera 2a built in the video telephone unit 2 and a visitor picture photographed by a camera 3a is monitored by the CRT 2c.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is a video door phone system in which a camera door phone is installed at the entrance etc. and the visitor image is checked on a monitor TV. The present invention relates to a video door intercom device having the above-mentioned structure.

[Conventional technology]

In recent years, video door intercom systems have become popular, in which a camera intercom is installed at an entrance or the like, and images of visitors can be viewed on a dedicated monitor television or a commercially available television.

[Problem to be solved by the invention]

In these systems, images of visitors are monitored on a commercially available television via a dedicated monitor television or television interface device, and the monitor unit is expensive and unnecessary. In addition, recently, still image videophones that transmit and receive still images over telephone lines have become a hot topic and are beginning to become popular, but at present, only the function of transmitting and receiving still images between still image videophones is used.

In order to solve these problems, this invention provides a videophone unit that adds a control circuit to a still image videophone to switch to a video signal from an externally operated camera doorbell and automatically turn on the power. An object of the present invention is to provide a video door intercom device which is connected to a video door intercom adapter together with a camera door intercom and a telephone, monitors images of visitors taken by the camera door intercom as a video in a video telephone unit, and is capable of answering the doorbell using the telephone. shall be.

[Means to solve the problem]

The video door phone device according to the present invention includes a camera door phone including a camera 1 microphone, a speaker, and a call button;
This video door phone device is composed of a video phone unit that displays still images and videos, a video door phone adapter that controls each part, and a telephone that is connected to the video door phone adapter. The videophone unit is equipped with a means for detecting a call, a means for emitting a ring tone in response to a doorphone call, a means for switching the telephone from a central office line to a doorphone call line, and a means for sending an activation signal to the videophone unit. The videophone unit is equipped with a control circuit that automatically turns on the power in response to a startup signal from the videophone unit, and switches the video signal from the image sensor built into the videophone unit to an externally input video signal.

[Effect]

In this invention, when a visitor presses the call button on the camera door phone, the video phone unit is activated via the video door phone adapter, the visitor's image is displayed on the video phone unit, and a call can be made between the camera door phone and the telephone. becomes. On the other hand, the telephone is connected to the telephone line by switching, and the image of the other party is displayed on the videophone unit along with the normal conversation.

〔Example〕

FIG. 1 is a block diagram of the entire video door intercom device according to the present invention. Here, the video door intercom adapter 1 is based on the present invention, the video phone unit 2 uses a generally popular still picture video phone, and the relay 2
g, 2i and a control circuit 2h are additionally mounted. Further, the camera door phone 3 is a typical example of a commonly used device.

In FIG. 1, the TV door intercom adapter 1 includes a door intercom control circuit 1a, a detection circuit 1b, a power supply circuit 1c, an incoming call detection circuit 1d, a sound source circuit 1e, a sounder 1f, a relay 1g,
It consists of a doorphone monitor button 1h. The videophone unit 2 also includes a camera 2a, a video control circuit 2b
, CRT 2c, relay 2d, power supply circuit 2e, manual switch 2f, relay 2g, control circuit 2h, and relay 21. Camera door phone 3 is camera 3a
, a call button 3b, a control circuit 3c, a detection circuit 3d, a power supply circuit 3e, a doorphone circuit 3f, a speaker 3g, and a microphone 3h. Note that 4 is a video line that connects the relay 2g and the camera 3a. 5 is a power supply/control line, which is a power supply circuit 1c.

The detection circuit 1b, control circuit 3c, and power supply circuit 3e are connected. A control line 6 connects the door phone control circuit 1a and the control circuit 2h. Reference numeral 7 denotes a door phone communication line, which connects the door phone circuit 3f and the door phone control circuit 1a. 8 is a telephone set, which is connected to relay 1g, and 9 is a telephone line, which is connected to relay 2d. In addition, relay 1g,
Contact points such as 2g are usually placed on the solid line side. The relay 2d is switched and used when transmitting and receiving images when used as a videophone. Also, relay 2g.

21 is controlled by a control circuit 2h. Since the videophone unit 2 and the camera door phone 3 are basically conventionally known devices, after explaining their normal usage using FIGS. 2 and 3, the operation of the embodiment shown in FIG. 1 will be explained. explain.

FIG. 2 is a block diagram for explaining a typical usage example of the still image video telephone unit, and 2a to 2f are the same as those shown in FIG. When the relay 2d is engaged as shown, the telephone 8 is connected to the 1st talk line 9 and is in a talking state, and when the relay 2d is switched, the video signal captured by the camera 2a is sent to the telephone line 9. . or,
The other party's video signal sent through telephone line 9 is sent to CRT2c.
will be displayed.

Figure 3 shows the normal usage status of the camera and door phone 3, including a dedicated monitor TV 2A and a dedicated door phone 8A.
is used together with the camera door phone 3. The dedicated monitor televisions 2A are 2b and 2c.

2a and 2h have the same functions as those in the video telephone unit 2 shown in FIG. 1, and also includes a detection circuit 2j.

The dedicated doorphone telephone 8A includes an incoming call detection circuit 8a, a doorphone control circuit 8b, a sound source circuit 8c, a sounder 8d, and
It consists of a speaker circuit block 8e.

This invention provides a television that can be connected to a general telephone line by connecting the video telephone unit 2 shown in FIG. 2 and the camera door phone 3 shown in FIG. 3 using a video door phone adapter 1 as shown in FIG. This is a doorbell device. The operation of the embodiment shown in FIG. 1 will be explained below.

First, regarding the monitor of the visitor image, when the call button 3b is pressed, the voltage change of the doorphone call line 7 is detected by the detection circuit 3d via the doorphone circuit 3f, and the control circuit 3
C turns on the camera 3a, and the power supply circuit 3e converts the power from the power supply circuit 1c to a constant voltage regardless of the length of the power supply/control line 5, and supplies power to the camera 3a. Here, the detection circuit 1b detects an increase in current, and the doorbell control circuit 1a sends a start signal to the control circuit 2h via the control line 6.
sent to.

On the other hand, the control circuit 2h that received the activation signal causes the relay 21 to
is activated, the video phone unit 2 is powered on, and the relay 2g is also activated, and the video control circuit 2b is connected to the video line 4 that inputs an external video signal from the camera 2a built in the video phone unit 2, and the CRT 2c The image of the visitor taken by the camera 3a can be monitored.

Next, for a doorphone call, when the call button 3b is pressed, the incoming call detection circuit 1d detects the incoming doorphone call,
Door phone control circuit 1a, sound source circuit 1e and sounder 1
The doorbell ringtone is emitted by f, and relay 1 is activated.
g is connected to the door phone control circuit 1a side. Here, when the telephone 8 is off-hook, the doorphone call line 7. A communication path is established by the doorphone circuit 3f, the speaker 3g, and the microphone 3h, and a doorphone call can be made.

In addition, for the doorbell monitor that allows you to see and hear what is going on outdoors, press the doorphone monitor button 1h.
Relay Ig is activated by the door phone control circuit 1a, and the door phone call line 7. A telephone call bus is created using the door phone 3f, the speaker 3g, and the microphone 3h, and the user can hear the surroundings using the telephone 8. At the same time, the camera 3a is turned on by the detection circuit 3d and the control circuit 3c, power is supplied to the camera 3a by the power supply circuit 1C and the power supply circuit 3e, and the increase in current is detected by the detection circuit 1b in the same manner as described above, and the door phone is controlled. A start signal is sent to the control circuit 2h by the circuit 1a via the control line 6, and the video telephone unit 2 is turned on, and the video control circuit 2b is connected to the video line 4, and the visitor image taken by the camera 3a is output. is CRT2c
You can monitor it with

In addition, in the videophone unit 2, relays 2g and 2i
The camera 2a, video control circuit 2b, CRT 2C, relay 2d, power supply circuit 2e, and manual switch 2f, excluding the control circuit 2h, normally function in the transmission and reception of still images in the same way as in the still image videophone.

〔Effect of the invention〕

As described in detail above, this invention is a camera.

A video door phone device consisting of a camera door phone consisting of a microphone, speaker, and call button, a TV 7-channel unit that displays still images and videos, a video door phone adapter that controls each part, and a telephone connected to the video door phone adapter. The video door phone adapter includes a means for detecting a call from the camera door phone, a means for emitting a ring tone in response to the door phone call, a means for switching the telephone from a central office line to a door phone call line, and a track signal to the video phone unit. and a control circuit for automatically turning on the power to the videophone unit upon receiving a start signal from the outside, and for switching a video signal from an image sensor built into the videophone unit to an externally input video signal. Therefore, images of visitors can be monitored in video using the videophone unit, and
The video telephone unit can serve both the function of transmitting and receiving still images through a telephone line and the function of monitoring visitor images in the video door intercom device, making it possible to construct an economical video door intercom device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the video door intercom device according to the present invention, FIG. 2 is a block diagram for explaining an example of normal use of the video phone unit, and FIG. 3 is a block diagram of a camera door intercom unit. FIG. 2 is a block diagram for explaining an example of normal use. In the figure, 1 is a TV door phone adapter, 1a is a door phone control circuit, 1b is a detection circuit, 1c is a power supply circuit, 1d is an incoming call detection circuit, 1e is a sound source circuit, 1f is a sounder, 1g is a relay, and 1h is a doorbell monitor button. , 2 is a video telephone unit, 2a is a camera, 2b is a video control circuit, 2c is a CRT, 2d is a relay, 2e is a power supply circuit, 2f is a manual switch, 2g is a relay, 2h is a control circuit, 21 is a relay, 3 is a Camera door phone, 3a is camera, 3b is call button, 3c is control circuit, 3d is detection circuit, 3e is power supply circuit, 3f is door phone circuit, 3g is speaker, 3h is microphone, 4 is video line, 5 is power supply/control 6 is a control line, 7 is a doorphone call line, 8 is a telephone set, and 9 is a telephone line.

Claims (1)

[Claims] A camera door phone comprising a camera, a microphone, a speaker, and a call button, a video phone unit that displays still images and videos, a video phone adapter that controls each of the above components, and a video phone adapter connected to the video phone adapter. A video door intercom device comprising a telephone, the video door intercom adapter having means for detecting a call from the camera door intercom, means for emitting a ring tone in response to the door intercom call, and connecting the telephone from a central office line to a door intercom line. switching means, and means for sending an activation signal to the videophone unit, the videophone unit receives an external activation signal and automatically turns on the power, and transmits an image of an image sensor built into the videophone unit. A video door intercom device characterized by being provided with a control circuit that switches a signal to an externally input video signal.