JP2001086490A - Video inter phone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate waste power consumption by outputting a video only when there is a person in front of a monitor base unit at the time of calling from a street handset with camera, and outputting no video when there is no person in front of the monitor base unit. SOLUTION: Concerning the video inter phone device capable of speaking while watching a video by calling a monitor base unit 200 from a street door handset 100 with camera, the monitor base unit 200 has human body sensors 217 and 218 for detecting the presence/absence of a person in front of the monitor base unit at the time of calling from the street door handset 100 with camera and a CPU 214 for controlling an output control circuit for outputting the video corresponding to output signals of the human body sensors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television intercom apparatus comprising a camera-equipped front door unit installed outdoors and a monitor base unit installed indoors, and relates to a television intercom apparatus for eliminating waste of power consumption.

[0002]

2. Description of the Related Art Conventionally, as an example of this type of television intercom apparatus, as shown in FIG.
There is known a television intercom apparatus including a monitor base unit 400 connected to a main unit 0 and a cable b.

In FIG. 2, a camera-equipped entrance device 300 includes a camera circuit 301, an FM modulation circuit 302, an unbalanced-balanced conversion circuit 303, an LPF (low-pass filter) 304,
It has a call button 305, a starting voltage detection circuit 306, a speaker 307, a speaker amplifier 308, a microphone 309, a mip amplifier 310, and a two-wire / four-wire conversion circuit 311.

[0006] A monitor master unit 400 shown in FIG. 2 includes a balance-unbalance conversion circuit 401, an FM demodulation circuit 402, a video amplifier 403, a CRT unit 404, and an image output control circuit 4.
05, 2-wire 4-wire conversion circuit 406, receiving amplifier 407, transmitting amplifier 408, receiver 409a and microphone 409b
Handset 409, entrance handset activation power transmission circuit 410, call detection circuit 411, hook switch 41
2. It comprises a CPU 413, a ring tone amplifier 414, a loudspeaker 415, and a power supply circuit 416.

[0005] In the television intercom apparatus configured as described above, when the visitor presses the call button 305, the LP
F304, a call signal is detected by the call detection circuit 411 via the cable b, and the CPU 413 sends the call signal to the CPU-equipped entrance terminal 300.
Announce a call from.

When notified of the call, the CPU 413 drives the entrance terminal activation power supply circuit 410 to transmit a voltage for starting the entrance device with camera 300 to the entrance device with camera 300 via the cable b.

The starting voltage detecting circuit 306 detects that a voltage for starting the front door unit 300 with a camera has been transmitted from the main monitor 400 to the camera circuit 301, the FM modulation circuit 302, the speaker amplifier 308, and the mip amplifier 310. Supply power. As a result, the monitor master unit 400 sends out the FM video signal from the camera circuit 301, the FM modulation circuit 302, and the unbalanced-balanced conversion circuit 303 through the cable b, and the speaker amplifier 308 and the mip amplifier 310 operate to enable a call.

The CPU 413 is provided with an image output control circuit 405.
FM demodulation circuit 402, video amplifier 403, C
The RT unit 404 is driven to operate the entrance device with camera 30.
The CRT unit 404 outputs an image of the FM image signal transmitted from 0 through the balanced-unbalanced conversion circuit 401, the FM demodulation circuit 402, and the video amplifier 403.

At the same time, the CPU 413
Is driven to amplify the ringing tone output from the CPU 413 by the ringing tone amplifier 414, and the ringing tone is emitted from the loudspeaker 415 to notify the presence of the customer in the living room, and the ringing tone is transmitted to the LPF 304, 2 via the cable b. Speaker 3 through the line-to-wire conversion circuit 311 and the speaker amplifier 308
A ringing tone is also sounded from 07 to inform the visitor that a call has been made. After ringing, the CPU 413 stops the ringing amplifier 414.

For a certain period of time after the call from the camera-equipped entrance device 300, the image output control circuit 405 and the entrance-device activation power supply sending circuit 410 are driven, and the CRT unit 404 keeps outputting an image. Thus, when a person in the living room comes to the front of the monitor main unit 400 to answer the call of the camera-equipped entrance slave unit 300, it is possible to see who sees the image and then respond.

However, after a lapse of a predetermined time after the call from the camera-equipped entrance device 300, the CPU 413 stops the control of the image output control circuit 405 and the entrance-device activation power transmission circuit 410, and the FM demodulation circuit 402, the video amplifier 403, CR
By stopping the operation of the T unit 404, the image is erased, and the transmission of the starting voltage to the camera-equipped entrance device 300 is also stopped. The operations of the camera circuit 301, the FM modulation circuit 302, the speaker amplifier 308, and the mip amplifier 310 are stopped. Then enter standby mode.

[0012]

In the above-described television intercom apparatus, even if there is no person in the room, the video of the main monitor unit is output for a certain period of time by a call from the camera-equipped entrance slave unit. There is the disadvantage of consuming power.

The present invention has been made in order to solve such a problem, and an image is displayed only when a person is in front of the monitor main unit when calling from the camera-equipped entrance slave unit.
An object of the present invention is to eliminate wasteful power consumption by not displaying an image when there is no person in front of the main monitor.

[0014]

In order to achieve the above object, a television intercom apparatus according to the present invention is a television intercom apparatus which can call a monitor base unit from a camera-equipped entrance unit and can make a call while watching an image. The base unit controls a human body sensor that detects whether or not a person is in front of the monitor base unit when calling from the camera-equipped entrance slave unit, and an output control circuit that outputs an image based on an output signal of the human body sensor. And a CPU.

In this television intercom apparatus, an image is displayed only when there is a person in front of the monitor main unit when calling from the camera-equipped entrance slave unit, and an image is displayed when there is no person in front of the monitor main unit. Unnecessary consumption of power can be eliminated by not allowing the power to be consumed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a television intercom apparatus according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of a television intercom apparatus according to one embodiment of the present invention.

1 is a camera circuit 101, an FM modulation circuit 102, an unbalanced-balanced conversion circuit 103, an LPF 104, a video circuit activation voltage detection circuit 105, a call button 106, a speech circuit activation voltage detection circuit. 107, speaker 108, speaker amplifier 109, microphone 110, mip amplifier 111, two-wire / four-wire conversion circuit 1
It has 12.

1 includes a balanced-unbalanced conversion circuit 201, an FM demodulation circuit 202, a video amplifier 203, a CRT unit 204, and an image output control circuit 2.
05, two-wire / four-wire conversion circuit 206, receiver amplifier 207, transmitter amplifier 208, receiver 209a and microphone 209b
Handset 209 and camera-equipped entrance device 10
0, which supplies power for activating the camera circuit 101, the speaker amplifier 109, and the microphone amplifier 111, and supplies power for activating the speaker amplifier 109 and the microphone amplifier 111 of the entrance device with camera 100. It comprises a call circuit activation power supply circuit 211, a call detection circuit 212, a hook switch 213, a CPU 214, a ringer amplifier 215, a loudspeaker 216, an infrared transmitter circuit 217, an infrared receiver circuit 218, and a power supply circuit 219.

In the television intercom apparatus configured as described above, when the visitor presses the call button 106, the LP
F104, a call signal is detected by the call detection circuit 212 via the cable a, and the CPU 214 informs the CPU 214
Announce a call from. CP notified of call
U214 drives the communication circuit activation power supply transmission circuit 211 to transmit the voltage for starting the communication circuit of the camera-equipped entrance device 100 to the camera-equipped entrance device 100 via the cable a.

The communication circuit activation voltage detection circuit 107 detects that a voltage for activating the communication circuit of the entrance device with camera 100 has been transmitted from the monitor master unit 200, and supplies power to the speaker amplifier 109 and the mip amplifier 111. As a result, the speaker amplifier 109 and the mip amplifier 111 are activated and a call can be made. At this time, the monitor master unit 200
The camera circuit 101 and the FM modulation circuit 102 are not driven because the video circuit activation voltage detection circuit 105 does not operate with the voltage for starting the communication circuit of the entrance device with camera 100 transmitted from the camera.

At the same time, the CPU 214 drives the ring tone amplifier 215, amplifies the ring tone output from the CPU 214 by the ring tone amplifier 215, sounds the ring tone from the loudspeaker 216, and notifies the living room that there is a customer. At the same time, a ringing tone is sent from the speaker 108 through the LPF 104, the two-wire / four-wire conversion circuit 112, and the speaker amplifier 109 via the cable a to notify the visitor that the call has been made.

After the ringing tone sounds, the CPU 214 stops the calling circuit starting power sending circuit 211 and the ringing tone amplifier 215 to stop sending the calling circuit starting voltage to the camera-equipped entrance terminal 100. The infrared sending circuit 217 and the infrared light receiving circuit 2
18 is driven for a fixed time.

In the meantime, when a person who knows the visitor by the ringing tone approaches the main monitor 200, the infrared transmitting circuit 2
When a person reflects the infrared light transmitted from the infrared light receiving circuit 17 and receives and detects it with the infrared light receiving circuit 218, the infrared light receiving circuit 218
Notify U214 that a person is approaching.

Then, the CPU 214 drives the entrance device start-up power supply sending circuit 210 to pass the voltage for starting the entrance device with camera 100 through the cable a, and the entrance device 100 with camera.
Send to

The video circuit start-up voltage detection circuit 105 and the call circuit start-up voltage detection circuit 107 detect that a voltage for starting the front door unit with camera 100 has been transmitted from the main monitor 200 of the monitor, and the camera circuit 101 performs FM modulation. Circuit 102,
Power is supplied to the speaker amplifier 109 and the mip amplifier 111. Thereby, the camera circuit 101, the FM modulation circuit 1
02, the monitor master unit 200 transmits the FM video signal from the unbalanced-balanced conversion circuit 103 through the cable a, and the speaker amplifier 109 and the mip amplifier 111 are activated to enable a call.

The CPU 214 is provided with an image output control circuit 205.
And the FM demodulation circuit 202, the video amplifier 203, and C
By driving the RT unit 204, the camera-equipped entrance terminal 10
The FM video signal transmitted from 0 is output to the CRT unit 204 via the balanced-unbalanced conversion circuit 201, the FM demodulation circuit 202, and the video amplifier 203 to output a video.

Thus, the person can respond to the visitor after confirming the image. When talking with a visitor, picking up the handset 209 activates the hook switch 213 to notify the CPU 214 that the handset 209 has been picked up. As a result, the CPU 214 determines that the infrared transmitting circuit 2
17. The infrared receiver circuit 218 is stopped, and the receiver amplifier 207 and the transmitter amplifier 208 are driven to set the transmitter / receiver 2
09 from the microphone 209b to the transmission amplifier 20
8, 2-wire 4-wire conversion circuit 206, cable a, LPF10
The speaker 108 is caused to output the sound from the monitor master unit 200 via the 4, 2-wire 4-wire conversion circuit 112 and the speaker amplifier 109. The audio signal from the microphone 110 is transmitted to a mip amplifier 111, a two-wire / four-wire conversion circuit 112, an LPF 1
04, the cable a, the two-wire / four-wire conversion circuit 206 and the receiver amplifier 207 to make the receiver 209a transmit the sound from the camera-equipped entrance device 100.

As a result, a call can be made between the camera-equipped entrance slave unit 100 and the monitor master unit 200.

When the handset 209 is pulled down after the call, the hook switch 213 informs the CPU 214 that the handset 209 has been dropped. Then, the CPU 214 stops the image output control circuit 205, the entrance terminal activation power transmission circuit 210, the reception amplifier 207, and the transmission amplifier 208, stops the activation of the entrance device with camera 100, deletes the image, and stops the call. Set to receiving state.

[0030]

As is apparent from the above description, according to the television intercom apparatus of the present invention, an image is displayed only when a person is in front of the parent device at the time of calling from the camera-equipped entrance device. When there is no person in front of the master unit, unnecessary power consumption can be eliminated by not displaying an image.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a television intercom apparatus of the present invention.

FIG. 2 is a block diagram of a conventional television intercom apparatus.

[Explanation of symbols]

 100: Entrance device with camera 200: Monitor master device 205: Output control circuit 214: CPU 217: Infrared transmission circuit (human body sensor) 218: Infrared light receiving circuit (human body detection) sensor)

Claims (1)

[Claims] 1. In a television intercom apparatus capable of calling a monitor master unit (200) from a camera-equipped entrance slave unit (100) and making a call while watching an image, the monitor master unit is called from the camera-equipped entrance slave unit. A human body sensor (217, 218) for detecting whether or not a person is in front of the monitor main unit, and an output control circuit (205) for outputting an image based on an output signal of the human body sensor.
And a CPU (214) for controlling the operation of the television intercom.