JPH11220724A - Video doorphone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain efficient use of a monitor of a video doorphone device. SOLUTION: A doorphone master machine 24 is freely separably provided with a portable master machine 46, and the portable master machine 24 is provided with a video change-over switch 53 which switches a master machine video output line L1 for transmitting a video signal from a camera (29) of a doorphone slave machine (26) and a television video output line L4 for transmitting the video signal from a TV tuner 52 and connects them to a monitor 54, and a sound change-over switch 56, that switches to a television sound output line L5 for transmitting a sound signal from the TV tuner 52 and connects it to a portable master loudspeaker 57. Then, at separating of the portable master machine 24 and power interrupt, a power source monitoring circuit 48 switches the monitor from a camera (29) of the doorphone slave machine (26) to the TV tuner 52 and the speaker from the doorphone slave machine to the TV tuner 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a TV intercom apparatus, and more particularly, to a monitor unit which is detachable from a master unit.
Further, the present invention relates to a television door phone device capable of monitoring an image of a television station by terrestrial radio waves.

[0002]

2. Description of the Related Art Hitherto, there has been known a TV door phone apparatus which can communicate between an intercom slave unit installed at an entrance or the like and a master unit installed indoors and monitor an image transmitted from the intercom slave unit with the master unit. Have been. As shown in FIG. 4, this type of television doorphone device includes a doorphone slave unit 1 with a camera installed at an entrance or the like, and a master unit 2 with a TV monitor installed indoors. 2 is connected by a transmission line 3.

The base unit 2 includes a rectifier circuit 5 connected to a power supply 4 (AC 100 V). DC power is supplied from the rectifier circuit 5 to each circuit of the base unit 2. Further, the base unit 2 is provided with a microphone 6, a speaker 7, an amplifier circuit 8 to which the microphone 6 and the speaker 7 are connected, and a multiplexing circuit 9 to be connected to the amplifier circuit 8. The multiplexing circuit 8 is also connected to the output side of the rectifier circuit 5, and superimposes an audio signal obtained by amplifying the sound collected by the microphone 6 by the amplifier circuit 7 and a power supply from the rectifier circuit 5 to form a multiplexed signal. This is transmitted to the intercom slave unit 1 via the transmission line 3.

[0004] The intercom slave unit 1 is provided with a power supply / voice separation circuit 10 and a power supply circuit 11 connected to the transmission line 3 in order, and converts the multiplexed signal transmitted through the transmission line 3 into an audio signal and a power supply. The separated power supply is supplied from the power supply circuit 11 to each circuit of the door phone slave unit 1. Further, an amplification circuit 12 to which the audio signal separated by the power / audio separation circuit 10 is input, a speaker 13 and a microphone 14 connected to the amplification circuit 12 are provided. Is reproduced and emitted from the speaker 13.

[0005] Further, the door phone handset 1 includes a CCD camera 15, a video signal processing circuit 16 for processing a video image picked up by the CCD camera 15 to form a video signal, and a video signal from the video signal processing circuit 16. A frequency modulation circuit 17 for performing frequency modulation is provided. A multiplexing circuit 18 is connected to the frequency modulation circuit 17. The multiplexing circuit 18 multiplexes a video signal from the frequency modulation circuit 17 and an audio signal amplified by the amplification circuit 12 with audio collected by the microphone 14. ,
The signal is transmitted to the transmission line 3.

On the other hand, the master unit 2 is provided with a video / audio separation circuit 19 connected to the transmission line 3, and separates the multiplexed signal transmitted on the transmission line 3 into a video signal and an audio signal. A video amplification circuit 20 for amplifying the separated video signal, an FM demodulation circuit 21 for demodulating the video signal from the video amplification circuit 20 to a baseband signal, a video signal processing circuit for performing video processing on the baseband signal from the FM demodulation circuit 21 22, a monitor 23 connected to the video signal processing circuit 22,
On the monitor 23, the CCD camera 15 of the intercom slave unit 1
Is reproduced. The audio signal separated from the multiplex signal by the video / audio separation circuit 19 is amplified by the amplifier circuit 8 and
Is reproduced and emitted from the speaker 7.

[0007]

However, in such a TV intercom apparatus, there is no way to use it in the event of a power failure, and the monitor provided in the main unit is fixed to the main unit main body and images are taken by the camera of the intercom sub unit. It is only used for monitoring the displayed video. The present invention makes effective use of the monitor installed in the master unit, makes the monitor part freely detachable from the master unit main body, not only monitors the image sent from the slave unit, but also removes the monitor part from the master unit main body. , Can receive terrestrial waves from TV stations,
It is another object of the present invention to provide a television intercom apparatus capable of monitoring disaster information broadcast from a television station when a power outage occurs.

[0008]

In order to achieve this object, a television intercom apparatus according to the present invention comprises:
Power is supplied from the DC conversion circuit to each unit of the doorphone master unit and the doorphone slave unit, and the video signal transmitted from the camera of the doorphone slave unit is reproduced on the monitor of the doorphone master unit. A video doorphone device having a portable base unit capable of making a call between a base unit microphone and a base unit speaker and being connected to and detachable from the doorphone base unit, wherein the portable base unit is a TV set connected to an antenna. A tuner, a monitor, a portable master speaker, and a battery;
The video output line of the V tuner is freely connected to the monitor via the video changeover switch, and the audio output line of the TV tuner is freely connectably connected to the portable main unit speaker via the audio changeover switch. The output line and the power output line of the battery charged from this power output line are connected to each part of the portable master unit freely through the battery changeover switch, and the power supply of the power output line is monitored to switch the video and audio switches. A power supply monitoring circuit that performs switching control of a switch and a battery changeover switch.

In the television intercom apparatus of the present application, a monitor provided on the intercom master unit for displaying an image transmitted from the intercom slave unit is provided so as to be freely attached to and detached from the intercom master unit, and a portable device including the monitor is provided from the intercom master unit. When the main unit is detached or when a power failure occurs, a stop of power supply to the power supply line is detected, power is supplied to the monitor unit, and the monitor is connected to the TV from the intercom slave unit.
Switching to a tuner and switching the connection of the speaker to a TV tuner can broadcast a broadcast from a television station. For this reason, the monitor of the intercom apparatus can be used as a portable television, the monitor can be effectively used, and in an emergency, information can be obtained by appropriately moving.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a preferred embodiment of a television intercom apparatus according to the present invention. As shown in FIG. 1, the television door phone apparatus of the present invention mainly includes a door phone base unit 24 and a door phone base unit 24.
Intercom slave unit 26 connected to transmission line 25 by
Consists of

As shown in FIG. 3, the intercom slave unit 26 is provided with a slave unit microphone 27 for transmitting and receiving a call signal between the intercom master unit 24 and a slave unit speaker 28, and the intercom slave unit 26 is provided. A camera 29, such as a CCD camera, for taking an image of the surrounding area is provided. An amplification circuit 30 is connected to the output side of the slave unit microphone 27 and the input side of the slave unit speaker 28, and the camera 29 includes a video signal processing circuit 31 for processing a video signal S 1 transmitted from the camera 29, A frequency modulation circuit 32 that frequency-modulates the video processing signal S2 output from the circuit 31 and outputs a video modulation signal S3 is sequentially connected. The frequency modulation circuit 32 is connected to the multiplexing circuit 33 together with the amplification circuit 30, and converts the audio signal S 4 input to the slave unit microphone 27 and amplified by the amplification circuit 30 and the video modulation signal S 3 output from the frequency modulation circuit 32. The multiplexed video / audio multiplex signal S5 is transmitted to the transmission line 25.

Further, the intercom slave unit 26 is provided with a power / sound separation circuit 34 connected to the transmission line 25 and a power supply circuit 35 connected to the power / sound separation circuit 34. S6 and the power supply are multiplexed to separate the power supply from the power supply audio multiplexed signal S7 transmitted through the transmission line 25, and the separated power supply is supplied to each circuit of the intercom 26. Further, the power supply / voice separation circuit 34 is
Audio signal separated from the power audio multiplex signal S7
S8 is amplified by the amplifier circuit 30 and is emitted from the slave speaker 27.

As shown in FIG. 2, the intercom base unit 24 is provided with a main unit microphone 36 for transmitting and receiving a call signal between the intercom units 26, and a main unit speaker 37.
And an amplifier circuit 38 to which an output side of the main unit speaker 37 and an input side of the master unit speaker 37 are connected. Further, the door phone master unit 24 is provided with an AC / DC conversion circuit 39 for performing AC / DC conversion of power supplied from the power supply 4 (AC 100 V).
Power is supplied from the C conversion circuit 39 to each circuit of the door phone master unit 24. The AC / DC converting circuit 39 is connected to the multiplexing circuit 40 together with the amplifying circuit 38, and the audio signal S6 input to the master microphone 36 and amplified by the amplifying circuit 38, and the AC / DC
Power supply audio multiplex signal superimposed with power supply from conversion circuit 39
S7 is transmitted to the transmission line 25 to supply power to the intercom slave unit 26 as described above.

Further, the intercom master unit 24 is provided with a video / audio separation circuit 41 connected to the transmission line 25,
The audio signal S9 is separated from the video / audio multiplexed signal S5 transmitted through the transmission line 25, the separated audio signal S9 is amplified by the amplifier circuit 38, and the audio input from the master speaker 37 to the slave microphone 27 is reproduced. Is emitted. Also, video /
A video amplification circuit 42, an FM demodulation circuit 43, and a video signal processing circuit 44 are sequentially connected to the audio separation circuit 41,
The video modulation signal S10 is separated from the video / audio multiplexed signal S5 in the audio separation circuit 41, amplified, FM-demodulated, and video-processed.
Is output from

In such a door phone master unit 24, a portable master unit 46 having a monitor unit 45 is provided.
It is provided to be able to freely contact and separate from A is for the portable base unit 46
Master unit power output line connected to C / DC conversion circuit 39
A battery 47 and a power supply monitoring circuit 48 respectively connected to L3 are provided. Battery 47 is the power output line of the master unit
Power is constantly supplied from L3 and is connected to a battery changeover switch 49 via a battery power output line L6 so that battery power can be supplied to the monitor unit 45. The battery changeover switch 49 includes a normally closed contact 49a to which the main unit power output line L3 is connected, a normally open contact 49b to which the battery power output line L6 is connected, and a power supply line for supplying power to the monitor 45. A fixed contact 49c to which L7 is connected, and a power supply monitoring circuit 48 for monitoring the power supply of the master unit power output line L3, the normally closed contact 49a to the normally open contact 49b when the power supply of the master unit power output line L3 is stopped. Can be switched to

The monitor section 45 is provided with a TV tuner 52 connected to an antenna 50 and whose tuning is controlled by a tuning circuit 51. A monitor 54 is connected to the TV tuner 52 via a video changeover switch 53. The video changeover switch 53 includes a normally open contact 53b connected to the television video output line L4 to which the television video signal S12 from the TV tuner 52 is transmitted, and a parent device to which the parent video signal S11 from the video signal processing circuit 44 is transmitted. A normally closed contact 53a connected to the machine video output line L1, and a fixed contact 53c connected to the monitor 54, and the normally closed contact 53a when the power supply of the parent machine power output line L3 is stopped by the power monitoring circuit 48. To the normally open contact 53b. In addition, TV
An audio changeover switch 56 is connected to the tuner 52 via a television audio output line L5 for transmitting a television audio signal S13 and an amplifier circuit 55. Voice switch 56
Is the normally open contact 56b to which the TV audio output line L5 is connected
And a normally-closed contact 56a, and a fixed contact 56c to which the portable master unit speaker 57 is connected. When the power supply monitoring circuit 48 stops power supply to the master unit power output line L3, the normally-closed contact 56a changes to a normally-open contact. It can be switched to 56b.

In the TV intercom apparatus having such a configuration, power is normally supplied from the AC / DC conversion circuit 39 to each circuit of the intercom base unit 24 when the portable main unit 46 is connected to the intercom base unit 24. At the same time, the power supply monitoring circuit 48 detects the supply of power from the master unit power output line L3, and the battery changeover switch 49 maintains the normally closed contact 49a closed, and the master unit power supply output line L3 and the battery changeover switch 49 normally closed contacts 49a, fixed contacts 49c,
Power is supplied to the monitor unit 45 via the power supply line L7. Also, from the AC / DC conversion circuit 39, through the multiplexing circuit 40, the transmission line 25, the power supply / voice separation circuit 34 of the intercom 26, and the power supply circuit 35, the intercom 26
Power is supplied to each of the circuits. At this time, the video changeover switch 53 also has the normally closed contact 53a closed, and the video signal S1 from the camera 29 of the intercom slave unit 26 is processed by the video signal processing circuit 31 and the frequency modulation circuit 32 The frequency is modulated and the slave unit microphone 27 is
Multiplexed with the audio signal S4 output from the amplifier circuit 30 and transmitted as the video / audio multiplexed signal S5 on the transmission line 25. Further, it is separated as a video modulation signal S10 by the video / audio separation circuit 41 of the doorphone master unit 24, amplified by the video amplification circuit 42, and FM-modulated by the FM demodulation circuit 43.
The video signal processing circuit 44 converts the video signal into a master video signal S11, and outputs a master video output line L1 and a normally closed contact 53 of a video changeover switch 53.
a, An image is displayed on the monitor 54 via the fixed contact 53c.

The sound collected by the slave unit microphone 27 is transmitted through the transmission line 25 as a video / audio multiplexed signal S5.
The video / audio separation circuit 41 of the door phone master unit 24 separates the audio / video multiplexed signal S5 from the multiplexed signal S5 as an audio signal S9, and
8 and amplified as master unit audio signal S14 as master unit speaker 3.
Sound is emitted from 7. In such a TV door phone apparatus, when the portable base unit 46 is detached from the door phone base unit 24, the power supply monitoring circuit 48 sets the base unit power output line L3.
When the power supply to the battery 47 is stopped, the normally open contacts 49b, 53b, and 56b of the battery changeover switch 49, the video changeover switch 53, and the sound changeover switch 56 are closed, respectively. L6, normally open contact 49b of battery switch 49, fixed contact 49
c, power is supplied to the monitor unit 45 via the power supply line L7. The monitor 54 is connected to the TV tuner 52 via the fixed contact 53c of the video changeover switch 53, the normally open contact 53b, and the TV video output line L4, and receives the ground wave transmitted from the TV station selected by the channel selection circuit 51 as an antenna. 50
And outputs a television video signal S12 output from the TV tuner 52 received by the TV. The portable master speaker 57 is connected to the TV tuner 52 via the fixed contact 56a and the normally open contact 56b of the sound changeover switch 56, the amplifier circuit 55, and the TV sound output line L5, and is similarly output from the TV tuner 52. The TV audio signal S13 is emitted from the portable main unit speaker 57.

At this time, the intercom master unit 24 from which the portable master unit 46 has been detached remains connected to the AC / D converter unless a power outage occurs.
From the C conversion circuit 39 to the door phone master unit 24 and the door phone slave unit 2
6 is supplied with power, the sound collected by the master unit microphone 36 is emitted from the slave unit speaker 28, and the sound collected by the slave unit microphone 27 is output from the master unit speaker 37. The sound is emitted, and a state in which a call can be made between the intercom master unit 24 and the intercom slave unit 26 is maintained.

In the above embodiment, the portable main unit speaker is described as a television audio output only. However, when the portable main unit is mounted, the sound of the intercom slave unit is transmitted from the portable main unit speaker via the audio switch. It may be sent.

[0021]

As is apparent from the above description, according to the television door phone apparatus of the present invention, the portable base unit is provided so as to be freely connected to and detached from the door phone base unit. Switching between a video output line for transmitting a video signal and a video output line for transmitting a video signal from a TV tuner to connect to a monitor, and an audio output line for transmitting an audio signal output from the TV tuner. The power supply line is provided when the portable master unit is detached from the door phone master unit or when there is a power outage, because the audio changeover switch connected to the portable master unit speaker and the power supply monitoring circuit that monitors the power supply from the power supply line are provided. The power supply to the monitor is detected and power is supplied to the monitor, and the monitor is connected to the T Switch to the tuner, also switches the connection of the speaker to the TV tuner, it is possible to broadcast the broadcast from TV stations. For this reason, the monitor of the intercom apparatus can be used as a portable television, the monitor can be effectively used, and in an emergency, information can be obtained by appropriately moving.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing a main part of the television door phone apparatus of the present invention.

FIG. 3 is a block diagram showing a main part of the television door phone apparatus of the present invention.

FIG. 4 is a block diagram of a conventional TV door phone apparatus.

[Explanation of symbols]

 24: Doorphone master unit 26: Doorphone slave unit 27: Slave microphone 28: Slave speaker 29: Camera 36 ····· Base unit microphone 37 ··············································································································· Battery 48 · Power monitoring circuit 49 Battery switch 50 Antenna 52 TV tuner 53 Image switch 54 ··· Monitor 56 ······· Audio switch 57 ························································································································ ..... TV tuner video output line L5 ... TV tuner audio output In L6 ······ battery power output line S1 ······ video signal

Claims (1)

[Claims] An AC / DC conversion circuit (39) of a door phone master unit (24) sends said door phone master unit and door phone slave unit (2).
Power is supplied to each unit of 6), and the video signal (S1) transmitted from the camera (29) of the intercom slave unit is reproduced on the monitor (54) of the intercom master unit, and the sub unit microphone (2) is reproduced.
7), a child device speaker (28), a parent device microphone (36),
A portable base unit (4) that can talk with the base unit speaker (37) and that is connected to the door phone base unit so as to be freely attached and detached.
6) A television intercom apparatus including: (6) the portable master unit includes a TV tuner (52) connected to an antenna (50), the monitor, a portable master unit speaker (57), and a battery (47). And a video output line (L1) of the intercom master unit and a video output line (L4) of the TV tuner are connected to the monitor via a video changeover switch (53) so as to be freely switchable, and a sound of the TV tuner is provided. An output line (L5) is switchably connected to the portable master speaker via a voice changeover switch (56), and a power output line (L3) of the door phone master and a battery of the battery charged from the power output line are connected. A power supply output line (L6) is connected to each part of the portable master unit so as to be freely selectable via a battery changeover switch (49), and a power supply of the power supply output line is provided. A video doorphone device, comprising: a power supply monitoring circuit (48) for monitoring the video changeover switch, the audio changeover switch, and the battery changeover switch to monitor the video changeover switch.