JPH03289254A - Door phone - Google Patents

Abstract

PURPOSE:To simply distinguish to which slave set the doorphone is connected by connecting a video display means and a transmission reception means to a slave set having a talking request in response to the talking request from the slave set, identifying the connected slave set and displaying slave set identification information together with a video image. CONSTITUTION:A door phone is connected to an optional slave set by a changeover means 24 according to a talking request from slave sets 1a, 1b, a slave set information display means (system control circuit 22, a superimposing circuit 21) identifies which slave station is connected and gives the information to a video image display means 7. Thus, the video image picked up by a image pickup device 3 of the connected slave set and the slave set identification information for identifying the connected slave set are simultaneously displayed on the video display means 7. Thus, a person resident in a room confirms which slave set is connected at present easily without taking notice of a call tone by having only to observe the screen.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a doorbell to which a plurality of handsets are connected, and in particular, the invention relates to a doorbell to which a plurality of handsets are connected.
This invention relates to a door phone with a monitor (abbreviated as video door phone) that allows you to make calls while displaying images on a base unit.

[Prior Art] Referring to FIG. 3, a video door intercom system includes a base unit 2 mainly installed indoors, and a plurality of slave units 1a, lb connected to the base unit. For example, the handset 1a includes a camera 3 for showing a visitor, a call push button 6 that the visitor presses to call a person in the room, a speaker 4 for making a call,
It has a microphone 5. The base unit 2 includes a handset 8 for making calls, a monitor 7 for displaying images of visitors taken by the cameras of the handsets 1a, lb, and a monitor switch 9 for turning the monitor 7 on and off. and has.

The base unit 2 and each slave unit 1a, lb are connected by a cable 1o.

The video doorbell system operates as follows. A visitor presses the call pushbutton 6 on the handset 1a.

The indoor main unit 2 emits a ringing tone. A person in the room makes a call using the handset 8. At this time, the user can talk while viewing the image of the visitor on the monitor 7.

When using an indoor base unit that can connect two or more slave units, the slave units are generally connected to the entrance or back door.

When multiple handsets are used, it is necessary to distinguish which handset the call is from. Therefore, in conventional devices, in order to notify the occupants of which handset's call button has been pressed, the tone of the ringtone is changed depending on the handset, and the number of rings is changed depending on the handset.

[Problems to be solved by the invention] In conventional video door intercom systems that can connect two or more handsets, it is possible to determine which handset received a call by changing the tone of the ringtone or changing the number of rings. I am trying to inform the people in the room. However, in order to distinguish the ringtone, the person in the room needs to stop what he or she is doing and listen carefully to the ringtone. Another problem is that if there is a sound source such as a television in the room where the base unit is installed, it may be difficult to hear the ring tone. As a result, it is necessary to judge whether the entrance is the entrance or the back entrance, or to ask the visitor, based on the scenery shown on the monitor, while watching the visitor's image on the monitor. In such cases, visitors may feel uncomfortable. Furthermore, when switching between each handset one after another from inside the room to check the surrounding situation of each handset, no ringing tone is emitted, making it difficult to know which handset is currently connected. do not have.

Therefore, an object of the present invention is to provide a doorbell that can easily distinguish which handset it is connected to.

[Means for Solving the Problems] A door phone according to the present invention is connected to a plurality of handsets, each of which has an imaging device, a transmitting/receiving device, and a call switch. This door phone has a video display means for playing back and displaying the image captured by the imaging device, a transmitting/receiving means for communicating with the transmitting/receiving device, and a transmitting/receiving device for responding to a call request from a handset. a switching means for switching and connecting the video display means and the transmitting/receiving means to a handset that has requested a call;
The device includes handset information display means for identifying the connected handset by the switching means and displaying handset identification information on the video display means together with the video from the handset.

[Operation The code door phone is connected to any handset by the switching means in accordance with a call request from the handset. The handset information display means identifies which handset is connected and provides it to the video display means. Therefore, on the video display means, the video captured by the imaging device of the connected handset and the handset identification information for identifying the connected handset are displayed simultaneously.

[Example 1] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an indoor main unit 2 which is an example of a doorbell according to the present invention.
1 is a schematic block diagram of a video door intercom system including: FIG. Referring to the construction drawing, this system consists of base unit 2 and base unit 2.
A plurality of handsets 1a, lb connected to the cable 1o by a cable 1o.
including.

For example, the handset 1a includes a power supply unit 14, a call push button 6 used by a visitor to call someone in the room, a microphone 5, and converts the sound collected by the microphone 5 into an audio signal,
a microphone amplifier 11 for amplification and a speaker amplifier for reproducing and amplifying the audio signal from the indoor base unit 2], 2
, a speaker 4 for receiving an audio signal from the speaker amplifier 2 and converting it into audio, a camera 3 for photographing the visitor, and a video signal modulator for modulating the video signal output from the camera 3. circuit 13, call pushbutton 6, microphone amplifier 11. It includes a multiplexing circuit 15 for superimposing the signal from the video signal modulation circuit 13 and applying it to the base unit 2, and for separating the signal from the base unit 2 and applying it to the speaker amplifier 12.

The indoor base unit 2 has a connection part 3 to which each slave unit 1a, lb is connected.
0, and a multiplexing circuit 23 for separating the signals sent from each slave unit into a calling signal, an audio signal, and a video signal, and for superimposing the audio signal from the indoor base unit 2 and transmitting the same to each slave unit. , a calling section 27 that is connected to the multiplexing circuit 23 and generates a ringing tone in response to a calling signal from a handset, and the multiplexing circuit 2
3, a communication unit 28 that reproduces the audio signal from the handset and makes a call to give the sounds of the people in the room to the handset;
A video processing unit 29 that is connected to the multiplexing circuit 23 and processes video signals sent from slave units and displays the processed video signals to the people in the room.
and a system control unit 22 for controlling each block of the indoor main unit 2, and a system control unit 22 that is connected to the system control unit 22, receives information about connected slave units from the system control unit 22, and is displayed on the video processing unit 29. The monitor switch 9 includes a superimpose circuit 21 for superimposing information for identifying a slave unit on a video image, a power supply unit 25, and a monitor switch 9 for switching the slave unit displayed on a video processing unit 29.

The connection unit 30 is provided for each slave unit, and includes a detection circuit 26a for detecting a signal sent from each slave unit and outputting a signal to the system control unit 22 indicating the slave unit that is calling and talking. 26b, and a switching circuit 24 for switching line connections between the base unit 2 and each slave unit 1a, 1b. The switching circuit 24 is connected to the multiplexing circuit 23 and connects the multiplexing circuit 23 and the slave device.

The calling unit 27 includes a speaker 17 and a ringing tone generation circuit 6 for detecting a calling signal from a handset and generating a ringing tone by means of a speaker function.

The communication unit 28 includes a handset 8 for a person in the room to communicate with a visitor using a handset, and a handset 8 that converts the audio signal from the handset 8 into an electrical signal and supplies it to the multiplexing circuit 23. It includes an audio signal control circuit 18 for reproducing the audio signal from the handset 23 into audio and providing it to the handset 8.

The video processing unit 29 includes a video signal demodulation circuit 20 for demodulating the video signal from the handset separated by the multiplexing circuit 23, and a monitor 7 for displaying the video demodulated by the video signal demodulation circuit 20. , and a video signal interface circuit 19 for converting the video signal demodulated by the video signal demodulation circuit 20 into a format suitable for display on the monitor 7.

The doorbell system shown in FIG. 1 operates as follows. For example, the visitor presses the call button 6 on the handset 1a. The call pushbutton 6 outputs a call signal, and the call signal reaches the detection circuit 26a via the multiplexing circuit 15 and the cable 10. The detection circuit 26a provides the system control unit 22 with information that there is a calling signal from the handset 1a. In response to information from the detection circuit 26a, the system control unit 22
Switch the switching circuit 24 to the handset 1a side. At the same time, the system control unit 22 operates the ringing tone generation circuit 16 to generate a ringing tone from the speaker F.

The camera 3 of the handset 1a photographs the visitor and provides a video signal to the video signal modulation circuit 13. The video signal modulation circuit 13 modulates this video signal and supplies it to the multiplexing circuit 15. The multiplexing circuit 15 multiplexes the applied video signal and the audio signal from the microphone amplifier 11 and sends it onto the cable 10. The signal sent to the cable IO passes through the switching circuit 24 and reaches the multiplexing circuit 23 .

The multiplexing circuit 23 separates the video signal from the input multiplexed signal and supplies it to the video processing section 29 . The video signal demodulation circuit 20 demodulates the modulated video signal and supplies it to the video signal interface circuit 19. The video signal interface circuit 19 displays the applied video signal on the monitor 7.

On the other hand, the system control unit 22 provides the superimpose circuit 21 with a signal indicating which handset is currently connected. In the video signal interface circuit 19, the superimpose circuit 21 superimposes a signal representing a connected handset, such as a signal representing a certain display symbol, on the video signal. Therefore, the superimpose circuit 2 is displayed on the monitor 7, superimposed on the video sent from the handset 1a.
1, a symbol indicating the handset 1a is displayed.

The symbols displayed on the monitor 7 are just numbers (1°2, ・
) or alphabets (A, B, . . .), or any other letter that can distinguish between slave units.

The person in the room can know the location of the visitor from the display symbol showing the handset displayed on the screen of the monitor 7.

In this case there is no need to listen carefully to the ringtone. Further, unlike the method of distinguishing by ringtone, it is possible to easily confirm which handset the visitor is connected to even when the visitor does not press the call pushbutton 6.

FIG. 2 shows an example of an image displayed on the monitor 7 and display symbols. Referring to FIG. 2, an image 31 of a visitor is displayed at the center of the screen of the monitor 7.

At the same time, a display symbol 32 is displayed in the upper right corner of the screen. In this case, the display symbol is "A".

As described above, since the display symbol indicating the handset is displayed on a part of the monitor screen, there is an advantage that the location of the visitor can be immediately known just by looking at the monitor screen.

Furthermore, when the monitor switch 9 is used to switch the slave units connected to the base unit 2 one after another, the following advantages arise. When switching slave units sequentially as described above,
It is difficult to tell which handset the screen being displayed was taken with. In this case, since there is no ringtone, it is not possible to confirm with the ringtone. However, if the display symbol indicating the connected handset is always displayed on the screen of the monitor 7 as in the above-mentioned embodiment, no matter how you operate the monitor switch 9 to switch the handset, You can always easily check which handsets are connected.

Note that the present invention is not limited to the above-described embodiments.

For example, in the embodiments described above, the video signal and the audio signal are multiplexed by a multiplexing circuit and transmitted over -1 cable. However, the present invention is not limited thereto, and a dedicated cable may be used for each of the video signal and audio signal without using a multiplexing circuit.

[Effects of the Invention] As described above, according to the present invention, information on which handset is currently connected is displayed on the video display means of the doorbell along with the image sent from the imaging device of the handset. . Even if the person in the room does not pay particular attention to the ringer, they can easily check which handset is currently connected by simply looking at the screen. Even when switching between devices, you can easily check which handset is connected.

That is, it is possible to provide a doorbell that can easily distinguish which handset it is connected to.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a system including a door phone according to the present invention, FIG. 2 is an example of a screen displayed on a monitor, and FIG. 3 is a schematic diagram of the door phone system. In the figure, la, 11) is a slave unit, 2 is a master unit, 3 is a camera, and 7
is a monitor, 15.23 is a multiplexing circuit, 16 is a ringing tone generation circuit, 18 is an audio signal control circuit, 19 is a video signal interface circuit, 2o is a video signal demodulation circuit, 21 is a superimposition circuit, and 22 is a system control 24 is a switching circuit, and 26a126b is a detection circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) A door intercom to which a plurality of handsets each having an imaging device, a transmitting/receiving device, and a call switch are connected, the video for playing back and displaying the video imaged by the imaging device. display means; a transmitting/receiving means for communicating with the transmitting/receiving device; and, in response to a call request from the handset, the video display means and the transmitting/receiving means are configured to communicate with each other in response to the call request. a switching means for switching and connecting to a slave unit; and a slave unit information display unit for identifying the slave unit connected by the switching means and displaying slave unit identification information on the video display unit together with the video. and a doorbell.