JPS60260280A - Doorphone camera system - Google Patents

Abstract

PURPOSE:To make reception to a visitor even at a location placed apart from a monitor by providing a light emitting element converting a voice into a light signal and transmitting it and a photodetector receiving it and transmitting the light signal to a doorphone reception circuit while being superimposed on a carrier. CONSTITUTION:A wireless microphone 30 applies FM modulation to a voice signal inputted from the microphone, converts it into a pulse signal to transmit by the light signal, the pulse signal drives an infrared-ray emitting diode 37 and transmits it. The transmitted light signal is received by a photodiode 21 of an adaptor 20 and after the signal is adjusted to a proper level, the signal is superimposed on the carrier and the result is transmitted to the doorphone 1 via a coaxial cable 7. The doorphone 1 applies FM detection to it, only the voice signal component is extracted, a speaker 4 is energized and given to a visitor. The voice of the visitor is inputted from the microphone 6 and transmitted to the monitor 8.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Application of Industry-L> The present invention relates to the configuration of a communication circuit of a monitor device in a doorbell camera system.

<Conventional technology> In recent years, the development of home automation (abbreviated as HA) systems has become active. There is a doorbell camera system that can receive images of people.

As shown in FIG. 3, the conventional doorbell camera system includes a camera lighting 2, a camera lens 3, a speaker 4,
A monitor panel 40 equipped with a door intercom 1 equipped with a call button 5, a micro etc., a handset 41 with a built-in speaker 41a and a microphone 41b, and a dedicated monitor television 42
(or a monitor device in which a communication part and an image receiving part are separated) are connected by a coaxial cable 7. In the doorbell camera system, when a visitor presses the call button 5 of the doorbell 1, the image receiving circuit is activated and the camera captures an image of the visitor illuminated by the lighting, and displays the image on the monitor panel 40'2 or the monitor. Dedicated monitor TV 42 for the device
The system will display a video on the screen and sound a ringtone to notify the visitor of the visit. Therefore, a call is made using a communication circuit consisting of a microphone and speaker 4 on the door phone j side and a handset 41 equipped with a monitor panel 40 or a microphone 41b and speaker 4ia on the monitor device side, and a call is made to answer the visitor. It has become. In the above-mentioned doorbell camera system, when the ringer is sounded due to a visitor's visit, the user must go to the location where the monitor device such as the monitor panel 40 is installed to answer the call, and must go to the kitchen or other place to do other work. It was very inconvenient when I was there.

<Problems to be Solved by the Invention> In view of the above-mentioned drawbacks, an object of the present invention is to provide a doorbell camera system capable of answering calls even from a position remote from the monitor device.

<Means for Solving the Problems> The doorbell camera system of the present invention includes a portable wireless microphone having a light-emitting element that converts an audio signal into an optical signal and transmits it, and a transmitting means for the portable wireless microphone, and the transmitting means. It has a light-receiving element that receives an optical signal transmitted from the intercom, and a signal converting means that superimposes the optical signal on a carrier wave and transmits it to the receiving circuit of the intercom.

<Operation> With the above configuration, when there is a visitor and the visitor presses the call button of the doorbell, the monitor device notifies the visitor of a ringing sound such as a chime or a buzzer. Therefore, an audio signal is converted into an optical signal by a transmitting means placed at a location remote from the monitor device, that is, at the operator's hand, and the optical signal is transmitted to the signal converting means using a light emitting element.

The optical signal is superimposed on a carrier wave by a signal converting means, sent to a reception circuit of the doorbell via a coaxial cable, and output as sound from a speaker of the doorbell. Furthermore, the image of the visitor captured by the doorbell camera is displayed on the monitor television screen of the monitor device, and the visitor's voice is output from the speaker of the monitor device. As a result, the operator can attend to the visitor while watching the visitor displayed on the television, even though he or she is located at a distance from the monitor device.

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

FIG. 1 shows the configuration of an embodiment of the doorbell camera system of the present invention, in which camera lighting 2,
Using a door phone 1 equipped with a camera lens 3, a speaker 4, a call button 5, a micro, etc., it is connected to the monitor device side with a coaxial cable 7, and an adapter 20 is connected to the coaxial cable 7 that connects the door phone 1 and a monitor TV 8. A portable wireless microphone 30 is provided as a separate body.

The gist of the present invention is on the monitor device side,
In particular, a wireless microphone 30 as a voice transmitting means equipped with a light emitting element 37 for transmitting an optical signal;
0, and an adapter 20 serving as a signal conversion means for converting the optical signal into an audio signal and transmitting the same to the receiving circuit in the door phone 1 by a carrier wave via the coaxial cable 7. on the telephone circuit.

FIG. 2 is a circuit diagram of an embodiment of a telephone communication circuit which is the gist of the present invention, and includes a wireless microphone 30 which is a transmitting means,
It is composed of an adapter 20 which is a signal conversion means and a receiving circuit 10 built into the door phone 1.

The wireless microphone 30 includes a microphone 31 and an audio amplification circuit 3.
2. Audio ALC (-Automatic Level
Control: automatic level control) circuit 33, FM ('
Frequency Mod-ulation) Modulation circuit 34, carrier wave transmission circuit 35, optical signal transmission circuit 36, infrared light emitting diode 37 as a light emitting element, switch 38
and a battery 39 as a power source.

With this configuration, the audio signal input from the microphone 31 is amplified by the audio amplification circuit 32, and the audio signal input from the microphone 31 is amplified by the audio ALC circuit 3.
3, the signal is controlled to an appropriate level and input to the FM modulation circuit 34. The FM modulation circuit 34 performs FM modulation on the audio signal and the carrier wave generated by the carrier wave transmission circuit 35, and converts it into a pulse signal to be transmitted as an optical signal in the optical signal transmission circuit. 37 to perform transmission. Note that the light emitting element is not limited to an infrared light emitting diode.

The adapter 20 includes a photodiode 21 as a light receiving element for receiving an optical signal, a light receiving signal amplifying circuit 22 for amplifying the received optical signal, a tuning amplifying circuit 23, and an ALC circuit 24.
and a carrier wave signal transmission circuit 25 that superimposes the amplified optical signal on a carrier wave and sends it to the coaxial cable 7. The optical signal received by the photodiode 21 is amplified by the received light signal amplification circuit 22 and the tuning amplification circuit 23, and then the ALC
After being adjusted to an appropriate level in the circuit 24, it is superimposed on a carrier wave in the carrier wave signal transmission circuit 25 and transmitted to the coaxial cable 7.

Note that the light receiving element 21 may be a transistor, and is not limited to the one in the embodiment.

The receiving circuit 10 includes a carrier signal receiving circuit 11, an FM detection circuit 12, an audio amplifying circuit 13, and a power amplifying circuit 14. In this circuit, the carrier wave signal transmitted via the coaxial cable 7, in other words, the audio signal, is received by the carrier wave signal receiving circuit 11, only the audio signal component is extracted by the FM detection circuit 12, and the audio signal component is extracted by the FM detection circuit 12. The signal is amplified by the amplifier circuit 14 and sent to the speaker 4. Then, the speaker 4 is sounded, and the sound is transmitted to the foreign American person through the speaker 4 of the door phone 1.

Next, the voice of the visitor is inputted from the micro of the door phone 1, appropriately amplified and modulated by the transmission circuit in the door phone 1, superimposed on a carrier wave, and transmitted as a carrier wave signal to the monitor device side. Then, the monitor device performs appropriate processing such as detection and amplification on the carrier signal and outputs the signal as sound.

Furthermore, as in the embodiment shown in Fig. 1, it is possible to project images of foreign Americans on the existing television set in each household by using a remote-controllable television as a monitor television. , the voice of the outsider is output from the TV's speakers.

Therefore, if you have the TV remote controller and wireless microphone 30 at hand, even if a visitor comes while you are watching TV, you can immediately switch to the monitor (for example, to an empty TV channel). The TV remote controller and wireless microphone can be integrated into one, which is very convenient.

Furthermore, by making the transmission signal of the wireless microphone into an optical pulse and minimizing the duty ratio of the optical pulse,
Since it consumes less power and can be powered by batteries, it can be made smaller and lighter.

<Effects of the Invention> As described above, the communication circuit of the doorbell camera system of the present invention uses a wireless microphone that emits a pulsed optical signal as a transmission means on the monitor device side, receives the optical signal, and superimposes it on a carrier wave. By installing an adapter on the coaxial cable as a signal conversion means for transmitting signals to the coaxial cable, it is possible to transmit signals from anywhere within the range of the sensitivity directional characteristics of the adapter's light-receiving element. It is possible to interact with visitors from a location away from the main body of the monitor device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the doorbell camera system of the present invention, FIG. 2 is a block diagram showing the circuit configuration of an embodiment of the telephone call circuit which is the main point of the present invention, and FIG. It is a structure T& diagram which shows an example of the conventional doorbell camera system. 1... Door phone 20... Adapter 21... Light receiving element 30... Wireless microphone 37... Light emitting element Applicant Sharp Corporation Agent Frame Harumi

Claims (1)

[Scope of Claims] ■. A doorbell camera system comprising 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., connected by a coaxial cable. A wireless microphone or other portable transmitting means having a light emitting element that transmits a signal as an optical pulse signal, and a light receiving element that receives the optical pulse signal, superimposes the optical pulse signal on a carrier wave and transmits the signal via a coaxial cable. What is claimed is: 1. A doorbell camera system comprising a signal converting means for transmitting signals to a receiving circuit within the doorbell. 2. The doorbell camera system according to claim 1, wherein a remote-controllable home television is used as the monitor television of the monitor device and the telephone receiving means.