JPS60261277A - Doorphone camera system - Google Patents

Abstract

PURPOSE:To use a home general TV receiver as a TV receiver by performing the remote control of a monitor device, which consists of an indoor machine having a transmitter and the remote controllable TV receiver, in accordance with a call signal from a doorphone by a repeater. CONSTITUTION:When a visitor depresses a call button 5 of a doorphone 1 installed in an entrance or the like, a camera 3 incorporated in the doorphone 1 or a door or attached above the door is operated, and the call signal from an output circuit provided in the doorphone 1 is received by a repeater provided on a circuit 7 which connects the call signal to the monitor device installed in a room. This repeater 20 detects the call signal from the doorphone 1 to generate an alarm tone and transmits a control signal consisting of the signal, which turns on a power source, and the signal, which selects an idle channel, to a TV receiver 40. Thus, the state of the entrance picked up by the camera 3 is projected to the receiver 40 to recognize the visitor, and transmission from the indoor machine is made possible.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a circuit configuration on the monitor device side when a remotely controllable television is used as the monitor television of the monitor device in a doorbell camera system. .

<Prior art> In recent years, the development of home automation (abbreviated as HA) systems has been gaining momentum, and one example is a monitor television that is installed at a suitable location in the home, with a television camera attached to a doorbell at the entrance or inside the door. There is a doorbell camera system that can receive images of visitors.

As shown in FIG. 7, the conventional door phone system is composed of a door phone 1 equipped with a camera lighting 2, a camera lens 3, a speaker 4, a call button 5, a microphone, etc., a speaker 52, and a microphone 53. A transmitting/receiving device 54, a dedicated monitor television 51, and a monitor panel 50 equipped with a transmitting button 55 (or a monitor device with a separate talking section and image receiving section) are connected by a coaxial cable 7. . When the foreign American presses the call button 5 of the doorbell, the image receiving circuit is activated and the camera captures an image of the foreign American illuminated by the lighting, and the image is displayed on the monitor panel 50 or on the monitor. The visit is displayed on the monitor television 51 of the device and a ringtone is sounded to notify the visitor of the visit. Therefore, the micro and speaker 4 on the door phone 1 side and the microphone 5 on the monitor panel 50 or monitor device side
3 and a speaker 52, the user can communicate with foreign Americans by transmitting a message while pressing the send button 5S. However, in the door phone system described in Section 2, the monitor television 5 of the monitor device
First, it has the disadvantage that a dedicated monitor television must be used, which increases the price of the monitor device.

<Problems to be Solved by the Invention> In view of the above drawbacks, an object of the present invention is to enable the use of a home-use remote-controllable general-purpose television receiver as a monitor television of a monitor device. .

<Means for solving the problems> The doorbell camera system of the present invention includes a camera, a microphone,
A doorbell equipped with a speaker, a call button, etc. is provided with a video signal transmitting means, an audio signal transmitting means, and a calling signal transmitting means, and is composed of the doorphone, an indoor unit having a voice transmitting means, and a general-purpose television that can be remotely controlled. The present invention is characterized in that the monitor device is connected via a repeater having a transmitting means for remotely controlling the general-purpose television receiver using the calling signal.

When a foreigner presses the call button on a doorbell installed at the entrance, the camera built into the doorbell or the door or attached to the top of the door is activated, and the output built into the doorbell is activated. The circuit sends a calling signal to a monitoring device installed in the room. The calling signal is received by a repeater provided on a line connecting the door phone and the monitor device.

The repeater detects a calling signal from the doorbell, generates an alarm sound, and transmits a control signal consisting of a signal to turn on the power to the television receiver and a signal to select an empty channel.

As a result, the situation at the entrance captured by the camera is displayed on the television receiver, the visitor can be recognized, and the visitor can be contacted by means of communication with the indoor unit.

<Example> Hereinafter, the doorbell camera system of the present invention will be explained in detail with reference to the illustrated example.

FIG. 1 is a schematic diagram showing an example of the overall configuration, and includes a doorbell 1 equipped with a lighting 2, a camera lens 3, a speaker 4, a call button 5, a micro, etc., and an indoor unit 30 with a built-in voice transmitter. and a monitor device consisting of a general-purpose television receiver 40, and a repeater 20 provided on a coaxial cable 7 connecting the door phone 1 and the monitor device. Note that 41 and 48 are a speaker and a television screen built into the general-purpose television receiver 40, respectively.

FIG. 2 is a schematic block diagram showing the main parts of the present invention,
The main components are a transmitter/receiver built in the door phone 1, a repeater 20, an indoor unit 30, and a general-purpose television receiver 40.

The transmitting/receiving device 10 includes a filter circuit 9, an amplifier (AMP
) 11, 14, automatic level adjustment circuit (ALC) 12, R
F converter 13, FM demodulation circuit 15, tuning circuit 16,
Gate circuit 17, output circuit X8 and carrier oscillator 19
inputted from the micro, amplified by the amplifier 11,
The audio signal adjusted to an appropriate level by the automatic level control circuit 12 and the video signal sent from the camera 8 are
The RF converter 13 performs FM modulation on the audio signal and AM modulation on the video signal, and sends them out to the coaxial cable 7 in order to input them to a vacant channel of the television receiver 40 . Furthermore, the audio signal sent from the monitor device side is extracted by the tuning circuit 16, demodulated by the demodulation circuit 15, and then amplified to a predetermined large i by the amplifier 14, and outputted as audio from the speaker 4. . The means for transmitting a calling signal consists of a gate circuit 17, an output circuit 18, and a carrier oscillator 19. By pressing the calling button 5, that is, turning it on, the gate circuit 17 is opened and the carrier oscillated by the carrier oscillator 19 is activated. is sent out onto the coaxial cable 7 via the output circuit. The circuit configuration of the calling signal generating means is shown in FIG. In FIG. 3, the gate circuit 17 has a resistor R
2, R3, capacitor C2, C,, C, and A N D
It consists of a circuit IC3, which constitutes an integrating circuit with a resistor R3 and a capacitor C3, suppressing spurious noise, and
The output is being adjusted. The output circuit 18 includes a resistor R4
, R5, R6, capacitor C5 and transistor Tr1
It consists of an emitter follower circuit. The carrier oscillator 19 consists of a resistor R8IRI, a capacitor C1, and an inverter IC, IC, and its frequency is determined by the values of the resistor R1 and capacitor CI. The filter circuit 9 includes a capacitor C6 and a coil L1, and prevents signal attenuation due to power source impedance.

Next, the repeater 20 includes a tuned filter 21, an amplifier 22,
Consists of a level detection circuit 23, a timer circuit 24, an alarm sound generation circuit 25, a control signal encoder 26, a transducer 27, a filter 28, and a power supply circuit 29. The level detection circuit 23 detects the presence or absence of a calling signal, operates the timer circuit 24, drives the alarm sound generation circuit 25 to generate an alarm sound for a predetermined period of time, and operates the control signal encoder 26. A control signal is transmitted from the transducer 27 to the television receiver. FIG. 4 shows a circuit diagram of the repeater 20. The tuned filter 21 includes a resistor R7, a capacitor C7, and a
8 and fill L2, coil L2 and capacitor C
The carrier of the paging signal that is in tune with the resonant frequency of the LC resonant circuit with 7 is extracted. Amplifier 22 includes resistors R81R9
It consists of 1RIOIR11, a capacitor CIO, and a transistor Tr2, and amplifies the carrier of the calling signal extracted by the tuned filter. The level detection circuit 23 includes a resistor R12, a capacitor C1l+CI2, a diode D,...
A voltage doubler rectifier circuit consisting of a capacitor Cl11C12 and diodes D, , D, . . . turns on the transistor Tr3. The timer circuit 24 includes a resistor R1
3. It consists of a capacitor Cl3, an inverter lc, , Ic5, and an ND circuit IC6. Alarm sound generation circuit 2
5 is the resistor R161R171R1B and the capacitor CI+
, transistor TrGIT'r7, inverter IC,I
C, o, AND circuit [composed of C8 and buzzer S, oscillates an audible frequency signal with an oscillation circuit consisting of resistor R171R1B, capacitor CN, and inverter IC, o, and sounds buzzer S using a push-pull method. It looks like this. A control signal sending circuit consisting of a control signal encoder 26 and a transducer 27 includes an AND circuit IC7, a resistor Rl (+ RI S, a transistor T
Consists of rllTrs and light emitting diode LED,
For example, when turning on the television receiver (10
1010...)2 control signal, when selecting channel 1c11 (110110110...
...) 2, the timer circuit 24 as shown in FIG.
By transmitting a control signal and a channel selection signal, respectively, within the predetermined time set in , it is possible to turn on the television receiver and select an empty channel. In this embodiment, a light emitting diode (LED) is used as the transmitting means, and infrared rays, which are currently used in remote controllable television receivers, are used as the transmission medium. The medium is not limited to those in the examples,
As for the setting location, any dark place on the coaxial cable 7 may be selected as long as signal transmission is possible.

The indoor unit 30 includes a distributor 31, a DC (r)C) power supply 32,
Also, a microphone 33 serving as a transmitting means, an amplifier 34, an automatic level adjustment circuit 35, an FM modulation circuit 36, and an output circuit 37
The audio and video signals from the doorbell 1 transmitted via the coaxial cable 7 are sent to the distributor 3.
1 to the tuner 47 of the television receiver 40, and the audio signal input from the microphone 33 is amplified by the amplifier 34, level-adjusted by the automatic level adjustment circuit 35, and then converted to FM by the FM modulation circuit 36. It is modulated and sent out on the coaxial cable 7 via the output circuit 37.

The television receiver 40 includes a transducer 41, an amplifier 42, a decoder 44, a power supply 45, a tuning circuit 46, a tuner 47, etc. used in the present invention. A control signal and a channel selection signal transmitted from the user 27 are received by a transducer 41, amplified by an amplifier 42, and sent to a decoder 43.
After decoding the meaning of the signal, turn on the power supply 45 and turn it off.
The relay 44 and the channel selection circuit 46 are operated. FIG. 5 is a circuit diagram showing the transducer 41 and amplifier 42. The transducer 41 has a capacitor C15
, a coil L4, and a photodiode PD, and the photodiode F'D receives control signals, channel selection signals, and remote control signals. The amplifier 42 includes a resistor R1.

R20+ R211R221R, 2:II R211R
25+ R2G, capacitor C161C171CI81
C19, consists of a field effect transistor FET and a transistor Tr, and since the input signal level is significantly attenuated due to distance, directivity, etc., P has a high input resistance.
The signal is amplified by an ET amplifier, and further amplified by a transistor amplifier to a level that can be discriminated by the decoder 43.

Further, the decoder 43 uses a microprocessor or the like,
1) Turn on the power supply 45 of the television receiver 40 by driving the relay 44, operate the channel selection circuit 46, and select an empty channel.

<Effects of the Invention> As described above, the doorbell camera system of the present invention uses a remote-controllable general-purpose television receiver that is already available in ordinary households, and immediately responds to a call from a visitor. As soon as you turn on the power, you can select an available channel and display the situation at the entrance, so there is no need to install a dedicated monitor television, and the visitor's voice is output from the television receiver's speakers. Since the system can be configured at a low cost, the indoor unit can be installed at a greater degree of freedom.

[Brief explanation of drawings]

1 to 6 show one embodiment of the present invention, FIG. 1 is a schematic configuration diagram showing the overall configuration of the doorbell camera system of the present invention, FIG. 2 is a block diagram of the main parts, 3 is a circuit diagram of the calling signal transmitting means, FIG. 4 is a circuit diagram of the control signal transmitting means, and FIG. 5 is a circuit diagram of the remote control signal receiving means of the television receiver. FIG. 6 is a waveform diagram showing an example of a control signal. FIG. 7 is a schematic configuration diagram showing an example of the overall configuration of a conventional door intercom system. 1...Doorphone, 10...Transmitting/receiving transmitter 20...
Repeater, 30...Indoor unit 40...Terpentine receiver Applicant: Sharp Corporation Agent Picture book 7, Lumi Figure 3 Figure 4 L J

Claims (1)

[Claims] In a doorbell camera system, a doorbell equipped with a camera, a microphone, a speaker, a call button, etc., and a monitor device equipped with a monitor TV, a telephone call device, etc. are connected via a coaxial cable, and audio and video signals are transmitted inside the doorbell. Transmit to an available channel on your television receiver,
A transmitting/receiving means is provided on the coaxial cable for receiving an audio signal from a monitor device and transmitting a calling signal, and in response to the calling signal, turns on the power of the television reception bay and selects an empty channel. A door intercom camera system comprising: a repeater having a transmitting means for transmitting a control signal; and connected to an indoor unit having a transmitting means and a general-purpose television receiver capable of remote control.