JPH0222990A - Image display control system - Google Patents

Abstract

PURPOSE:To reduce a system cost and to easily constitute the system by generating a computer image in the inside of an image transmission unit, and transmitting a generated computer image to each interphone master unit. CONSTITUTION:A multiplex transmission controller 3 is connected to a multiplex terminal unit such as a doorphone slave unit 4, the interphone master unit 1, the image transmission unit 2, and a relay control unit 6, etc., and the image transmission unit 2 via a multiplex transmission line l1, and the image transmission unit 2 is connected to each interphone master unit 1 with a video signal transmission line (l). And the computer image corresponding to the operating state of a control equipment in the system is generated by the image transmission unit 2 provided in common, and is displayed on a monitor television 1a in the interphone master unit 1. In such a way, it is possible to reduce the total cost of the system and to facilitate the constitution of the system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image display control system that is incorporated into an intercom system with a television monitor.

[Prior Art] An intercom system with a monitor TV has been developed in which a video signal from a camera attached to a doorphone slave unit is received by an intercom parent AM, and a visitor is seen on a monitor TV while responding to the call. The system is for home use,
There are many types, ranging from large-scale systems for buildings, and additional functions are becoming increasingly diverse.

By the way, in such a system, when a visitor operates the call button of each of the plurality of doorphone subunits, the visitor's appearance is displayed on the monitor of the intercom base unit with monitor TV installed in the dwelling unit. If a call is made while being displayed on the TV, and if a fire alarm is activated and a security signal is detected, a computer image corresponding to the detected security signal will be displayed on the TV monitor. There is.

FIG. 13 is a configuration diagram of such an intercom system with a monitor television.

In the figure, 100... is an intercom with a monitor TV installed in the residence.In addition to camera video signals, security signals and terminal control status can be converted into computer images and displayed. But 1
0] ... is an intercom base unit with a monitor TV that can only display the video signal sent from the camera! It is.

Further, 102 is a camera switching unit, and 103 is a camera provided corresponding to the door intercom slave unit 105, which is provided at a front door or the like. 104 is a multiplex transmission controller for multiplexing control of multiplex transmission terminals; 106 is a multiplex transmission controller for controlling multiplex transmission terminals;
, a distributor for distributing and supplying to the main unit 100, 107 a W alarm display unit that displays Vfij and W alarms of fire etc. in response to signals from the security signal man crab unit 110 to which a fire sensor etc. are connected, 108 a lighting control 109 is an electric lock bullet control unit that controls the electric lock, and these components all constitute a multiplex m terminal unit, and transmit multinomial signals from the controller 304 in a time-division manner. line j
! The video signal from the camera 103 is transmitted to the parent device 101 and the parent device 100 via a video signal transmission line made of a coaxial cable or the like.

To explain the basic operation of such a system, the visitor is now a doorbell slave! 05... call button 105
When a is operated, the camera 103 installed corresponding to the door-pon slave unit 105 is activated, and the image of the visitor is converted into a video signal by the camera 103, which is sent to each intercom friendly unit 101 and the main unit through the coaxial cable control and distributor 106. 10
0... and a video is displayed, and a ring tone is output from the base unit 101.11100.

Therefore, in response to this ring tone, the parent aiot or m
When the device 100 responds, all the TV monitors of the parent device other than the one that responded are turned off, and from then on, the parent device that responded and the child device 1
Video transmission and phone calls are performed with 05.

FIG. 14 is a block diagram showing the basic configuration of the camera switching unit 102 used in such a system.

This camera switching unit 102 transmits/receives multiplexed signals transmitted from the multiplexed signal transmission line j11 (8 parts 102
b, and when the call button 305a is operated, the child'J! j
105, selects the camera 103 to be driven by the camera switching unit 102a, and transmits the video signal from the driven camera 103 to the base unit side through the video signal transmission line l.

Also, in the parent @i oo of the above system, its operation switch! 00b enables terminal devices to be controlled, for example, by controlling electric locks and lighting devices, and when controlling such terminal devices, the operation switch 100d of the main device 100 in FIG. 13 is operated. and monitor TV 100a
When power is applied, a computer image created inside the base unit 100 is displayed on the monitor television 100a, and by operating the operation switch 100b according to the instruction menu on the screen, the relay control unit 108 or electric lock control unit 109, etc. Control equipment within the system can be controlled through the multiple side W terminal unit.

By the way, in such an intercom base unit, the base unit 101 that can only display camera images is relatively inexpensive, but cannot display alarms or control status; When monitoring and controlling terminals using the base unit 100, a unit is required to create computer images for each of the intercoms with monitor TVs 100 installed, and a separate M-report display unit is required. In the case where only monitoring is performed, it is necessary to add a dedicated unit, which increases the system cost, and there is a desire for system improvement.

In addition, when constructing such a system, if the number of control devices and control terminal units increases, it is possible to simultaneously control different control devices in the system from multiple intercom base units, or to change the number of control devices in the system. There is a need to simultaneously display the operating status of different control devices, and in this case, adopting the conventional method of adding a unit that generates computer images to the intercom base unit not only complicates the system configuration but also increases costs. There are problems such as an increase in the number of people living in Japan, and some kind of countermeasure is desired.

[Problems to be Solved by the Invention] The system of the present invention proposed to solve the above points has a configuration in which a computer image is created inside the image transmission unit and the created computer image is transmitted to each intercom base unit. The purpose of the present invention is to provide an image display control system with reduced system cost.

[Means for Solving the Problems] In order to achieve the above object, the proposed first invention provides a multiplex transmission controller, a control unit for a door intercom slave unit, an intercom main unit with a monitor TV, a lighting fixture, etc. The multiplex transmission terminal unit attached to the control W equipment in the system, including the above, is connected with the No. 1-8 transmission line, and the image transmission unit is connected to the intercom base unit with monitor TV using the video signal transmission line. The image display control system is configured to generate a computer image in the image transmission unit of the operating state of the control equipment in the system transmitted from the multiplex transmission terminal unit, and to use the generated computer image as a computer image. The feature is that the image is displayed on the monitor TV of the intercom base unit.

In addition, in a system that is an improved version of such a basic system, the image transmission unit includes a plurality of image generation units that generate computer images of control states of control devices in the system according to the control type; It has a plurality of modulation circuits with different variable fI frequencies corresponding to the image generation section, and the computer image generated by the image generation section is sent to the video signal transmission line by a frequency multiplex modulation method. The other intercom base unit is configured to include a demodulation unit that can selectively receive computer images generated by the image generation units of the image transmission units.

In addition, such a system can be configured to include an electric lock control unit that controls the electric lock in the multiplex transmission terminal unit, and furthermore, the multiplex transmission terminal unit can include security devices such as electric fire alarms and security sensors. It can also be configured to include a security signal person crabnit who inputs the <= sign.

In a further improved system, at least one camera is provided in one of the multiplex transmission terminal units, and the surveillance video in the system inputted by this camera is taken into the image transmission unit and is then sent to the monitor of the intercom base unit. Create a composite image by displaying it directly on the TV, or by importing it into the image transmitting unit and combining it with a computer image that shows the operating status of each control device in the system, and send the created composite image to the intercom base unit. It is said that the composition is designed to project images.

[Operation] In the basic system of the present invention, a computer image corresponding to the operating state of the control equipment in the system is generated by a commonly provided image transmitting unit and displayed on the monitor TV of the intercom base unit.

In the improved system of the present invention, a computer image corresponding to the operating state of the control equipment in the system is generated by an image generation section provided according to the type of control, and the generated image information is large! The modulated signal is sent to the video signal line according to the modulation method, and by selectively demodulating this modulated signal on the intercom base unit side, different control information can be displayed simultaneously on the monitor TVs of multiple intercom base units in the system.

Also, in the multi-transmission terminal unit? For those that include an electric lock control unit that controls the lock, for security such as electric fire alarms and security sensors (for those that include a security signal that inputs No. 8, the monitor TV of the intercom base unit) Through this, you can also monitor electric locks and security.

Furthermore, at least one camera is installed in one of the multiplex transmission terminal units, and the surveillance video in the system inputted by this camera is taken into the image transmission unit and displayed as it is on the monitor TV of the intercom base unit. Or, create a composite image by combining it with a computer image taken into the image transmission unit and showing the operating status of each control device in the system, and project this created composite image on the intercom base unit. In such a system, if a camera is installed in response to a fire detector, the status of the scene of a fire can be displayed on the spot when a fire alarm is activated.

[Example] Hereinafter, an example of the present invention and a system will be described with reference to the drawings.

FIG. 1 is a basic configuration diagram of the system of the present invention.

In the diagram, 1 is an intercom with monitor TV $112
1 is an image transmission unit that generates a computer image according to control information sent from a multiple transmission terminal unit in the system; 3 is a multiplex transmission controller; 4 is a door intercom slave installed at a doorway; 5 is an image transmission unit 2 a distributor for transmitting the computer image generated by the computer to each intercom base unit by coaxial cable control; 6
1 is a relay control unit for turning on and off control equipment such as lighting equipment and air conditioners, 7 and 8 are electrical lock control units that are added as necessary, and relay control units for controlling equipment such as fire detectors and security sensors. It shows a security signalman crabnit who detects sexity signals.

As shown in the figure, the multiplex transmission controller 3 has a doorphone hanger 4. Intercom base unit 11 image transmission unit 2.
It is connected to a multiplex transmission terminal unit such as the relay control unit 6 and the image transmitting unit 2 via a multiplex transmission line 11 (one bare transmission line), and the image transmitting unit 2 and each interbon base unit l... , and are connected by a video signal transmission line e composed of a coaxial cable or the like.

To explain the basic operation of this system, a 111i customer presses the call button 4 of the doorphone subunit 4 installed at the entrance etc.
When a is operated, each intercom 1161 is called simultaneously through the multi-m transmission controller 3. And intercom parent 8! .

On the other hand, when the monitor switch lb on the intercom fill side is operated, the monitor TV is turned on, and a control menu as shown in FIG. transmitted to,
It is displayed on the screen of the monitor television 1a.

Among the items displayed on this screen, for example, when performing lighting control, the switch lla corresponding to the screen a display is operated from the operation switch group 11.

Then, a screen related to lighting control as shown in FIG. 2(b) is displayed on the monitor television la instead.

This screen shows the current operating status of the lighting fixtures installed in the system (in Figure 2 (a), all lighting fixtures are turned on). For example, if you want to turn off the lights in the living room, , the operation switch lj corresponding to the screen in the living room
When you operate c, the screen changes as shown in Figure 2 (C), and you can confirm that the living room lights have been turned off.

If you want to turn on the lights in the living room again, you can do so by operating the second operation switch llc, which turns on the jump light in the drawing room and the downlight in the drawing room.

When controlling street lights, there are operation switches provided corresponding to each display position.
All you have to do is operate d.

Thus, in the system of the present invention, the display control of the control equipment is performed by operating the operation switch instructed by the screen display of the monitor TV 1a of the intercom base unit 1, and a confirmation display is displayed on the screen in case of an operation error. Become.

In addition, Figures 3(a) and 3(b) show examples of screen displays in the -simultaneous display mode, which are generated by the image transmitting unit 2 when the security signalman Kaninit 8 detects a fire signal. This example shows a computer image displayed on the monitor television 1a of the intercom base unit 1.

When a fire detector installed in a dwelling unit or the like generates an alarm, a security signal is input to the multiplex transmission controller 3 through the security signal controller 8. In the image transmitting unit 2, a computer image (fire information such as the room where the fire occurred) is generated according to the sexuality signal at this time, and the image transmitting unit 2 transmits all iWLs.
...monitor TV! A circular signal to energize a is sent, and the monitor TVs 1a of all base units 1 in the system are
Display the image on.

Since the occurrence of a fire is an emergency information, even if the monitor switch la of the intercom base unit is OFF, the monitor TV is forcibly turned ON and -C- is displayed simultaneously.

The example in No. 3 'JJ (a) shows an example where a fire breaks out in the living room.:1 To stop the fire signal, operate the operation switch lla according to the screen. However, in order to issue an alarm that is further amplified and output from a separate alarm device or the like, this is done by operating the operating switch 11b according to the screen.

On the other hand, Figure 3(b) shows the parent! ! This shows the screen display when A1 does not have a switch display function, and in this case, necessary operations such as stopping the alarm can be performed by operating a separate operation switch (not shown) provided on base unit 1. It is done. The structure of the intercom base unit in the system of the present invention may be as described above.

4th Vj! J is a block diagram showing the internal configuration of the image transmitting unit 2 in the system of the present invention.

In the figure, 2a is image data R that stores image data to be output in response to control signals from each multiplex transmission terminal unit.
Image data created in OM according to the type of control or monitoring is stored in advance.

2b is a program ROM, and 2c is a RAM that stores information sent from the multiplex transmission terminal unit by address. These memories are connected to the host CPU 2d for processing. The multiplexed signal from transmission line β1 (No. 8) is input to the host computer 2d through transmission/reception g2e, and the video display processor 2g receives the video signal temporarily stored in the video RAM 2h and converts the computer image into the host computer 2d. It is created and transmitted to the main unit (■) via the video signal transmission line 2.
1 is the video display processor 2g, and the video R
Although it is configured by combining AM2h, a modulation circuit 2f (indicated by a dashed line) is provided when it is necessary to modulate and transmit the generated image data.

In addition, Figure 5 shows the intercom parent III with TV monitor.
FIG. 2 is a block diagram of the main part configuration of In the figure, the video signal transmitted through the video signal transmission line 1 is transmitted through a demodulation circuit 1d (provided correspondingly when a modulation circuit is provided on the image transmission unit side (see FIG. 8)), a video signal processing circuit ! It is displayed as an image on the monitor section 1f through e,
On the other hand, the signal of the operation switch group 11 is
The video signal of the screen corresponding to the operation of the operation switch 11 is transmitted from the transmitting/receiving section 1g to the image transmitting unit 2 through the transmitting/receiving section 1g, and is sent back.

Next, the multiplex transmission method adopted in this system will be explained.

For multiplex transmission, there are methods such as time division multiplex transmission and frequency division multiplex transmission. For example, when transmitting by time division, the multiplex signal has a start pulse, an address part, and a control signal, as shown in Figure 6. It consists of a signal section and a transmission signal section.

This multiplex transmission method uses each multiplex transmission terminal unit (in this embodiment, the relay control unit 6, the electric lock control unit 7,
Security signalman Kaninit 8, intercom base unit! , a doorphone hanger 4, an image transmitting unit 2, etc.), and the multiplex transmission controller 3 performs polling access at all times.

That is, the multiplex transmission controller 3 sequentially sends control signals with addresses to all terminal units,
(See Figure 6(,a)), the terminal unit with the matching address decodes the control signal and performs the control operation,
The controller 3 transmits multiple reply signals indicating its operating status.
(See FIG. 6(b)).

Such a polling access operation is always performed on all terminal units in a predetermined order, and if, for example, the monitor switch 1b of any intercom base unit l is operated during this polling access, this signal is is received by the multiplex transmission controller 3, the polling access is interrupted, the television monitor la is energized, the computer image from the image transmitting unit 2 is displayed, and the operation of the operation switch 11 is guided.

When any of the operation switches 11 of the intercom base unit 1 is operated, an interrupt is generated by a specific bit of the address signal section, and the multiplex transmission controller 3 performs necessary control on the corresponding control equipment. When this control is completed, polling access is continued from the state at the time of interruption.

Data indicating the operating status from such terminal units is stored in the RAM in the multiplex transmission controller 3 for each terminal unit.
and is stored in the RAM within the image transmission unit 2. This data is constantly updated according to polling access and is stored as the latest data.

In this way, since polling access to the terminal units is constantly performed at high speed by the multiplex transmission controller, control of other terminal units by the operation of each terminal unit is performed substantially in real time.

FIG. 7 is a diagram showing an example of control assignment of each bit of such a multiplexed signal.

The control signal section transmitted from the multiplex transmission controller 3 to each terminal unit is composed of 8 bits, and the transmission signal section sent back from each terminal unit to the multiplex transmission controller 3 is also composed of 8 bits.

For example, monitor 0N10FF control is controlled by control section 48 (
It is defined by the Jth bit and the 1st bit, and if the 0th bit is at the rHJ level, the monitor will be turned on, and if the 1st bit is at the "■(" level), the monitor will be turned off.
In other cases, regulation (wholesale is not carried out (Figure 7 (a))
reference>.

On the other hand, the 8th bit of the transmission signal section contains monitor ON/
O[i'' FF state is defined, and the 0th to 3rd bits define the operating states of operation switches 1 to 4 (see FIG. 7(b)).

Next, a system according to another aspect of the present invention will be described in which a video signal is transmitted from an image transmitting unit using a frequency multiplex modulation method.

This system has a configuration in which a plurality of video signals are multiplex modulated using a plurality of carrier waves and then transmitted.

FIG. 8 is a block diagram showing the internal configuration of the image transmitting unit 9 that employs such a frequency multiple modulation method.

This image transmission unit 9 includes a video display processor 9g (1) to (n), a video RAM 9h (1)
n image generation units 9 configured by combining ~(n)
1... and nl! provided corresponding to these image generation units 91... i modulation circuit Of (1) to (n)92.
..., and each image generation unit 91 ... determines the control type of control equipment in the system, the type of monitoring information (for example, security information, lighting equipment, good luck information for air conditioning equipment, control of electric locks, etc.). ) generates image data according to
In the modulation cycle vs92..., the image data generated by the image generation unit is sent to the video signal transmission line l by frequency multiplication.

In this method, each intercom base unit 1 has a modulation circuit 9f (1) to (n) 92 . . . of the image transmitting unit 9.
Although a demodulation circuit that can selectively demodulate multiple modulated waves is required, the transmission line for multiplexed signals can be achieved using a single set of signal lines, similar to the time-division method described above.

Therefore, in this image transmitting unit 9, even if there is a request to display different types of images from multiple intercom 211 machines 1φ..., the information requested by each intercom base unit will be displayed at the same time. It can be checked or controlled.

FIG. 19 is a diagram showing the configuration of a further improved system of the present invention.

In this embodiment, a camera switching unit is built into the image transmission unit 10, and in addition to computer images, the video from the camera 12 can be transmitted to the base unit 1, which is the same as the basic system described above. different. Therefore, the same parts will be given the same numbers and their explanation will be omitted.

FIG. 10 is a block diagram showing the internal configuration of the image transmitting unit 10, in which I2 is a plurality of cameras installed according to the installation location of the door-pong hanger 4 or the fire sensor, etc., and 10 is a camera. This is an image transmission unit with a built-in switching section 10k.

When, for example, an image of a camera corresponding to a specific sensor is displayed on the monitor television 1a of the base unit 1 by the good luck signal from the multiplexed signal transmission line 11, the operation is as follows. When a disaster detector installed indoors issues an alarm, this signal is input to the multiplex transmission controller 3 and the transmitting/receiving section 10e of the image transmitting unit 10. The multiplexed signal is received by the transmitting/receiving section 10e, signal processed by the host CPU 1Od, and sent to the camera switching section 10 as I! The moving camera is selected and camera +2 is driven. A video signal from the camera 12 is sent to an image synthesis circuit 10j via a synchronization separation circuit 10c.

The video signal of the camera 12 is output to the video signal transmission line β through the video processing circuit 10i and the modulation circuit 10f1.

If a computer image is required at the same time, the multiplexed signal is determined by the host CPU 10d and stored in the video RAM 10.
A computer image is created by h and a video display processor log, and the computer image is synthesized with the video signal from the camera through an image synthesis circuit ga]Oj.

Therefore, even in the event that a fire breaks out while interacting with a visitor, the warning will be displayed on the monitor television screen, making it possible to take immediate action.

FIG. 11 shows the image transmitting unit) 2 (9°10) of the present invention.
3 is a flowchart showing the operation of FIG. To explain the operation according to the figure, the image transmitting unit 2 constantly monitors the signal on the multiplex signal transmission line 4, and when a received signal is transmitted, the address signal section determines whether the signal is from the intercom base unit or not. Determine (step 1000.1
001).

If the signal is not 1δ from the intercom base unit 1, but a security signal from a fire detector, etc., the corresponding terminal unit installed in the image transmitting unit 2! - Update the data indicating the operating status of step 1002), and proceed from step 1003 to step 1006 to determine whether the data signal requires simultaneous display.

If simultaneous display is required, the new simultaneous display mode is entered, and after writing the necessary screen data from among the image data stored in the image data ROM 2a in advance to the video display processor (VDP), all Turn on the monitor TV la... of the intercom 1161...
Screen data corresponding to the type of control and monitoring to be displayed at that time is stored in the RAM 2c (steps 1006-
1008).

On the other hand, in step 1003, the image transmitting unit 2
If the related screen is already being transmitted in response to the received signal, the screen data is updated in step 1004 in order to display the next screen.

On the other hand, when the address of the intercom group Ill is determined in step 1001, a screen OFF request (monitor switch OFF) is determined, and if there is an OFF request, image transmission is stopped, and only in case of simultaneous display mode. Then, turn off the clouding of the monitors 1a of all the intercom base units 1 (steps 1009 to 101 B), but if the mode is other than simultaneous display mode, the monitors 1a of the intercom group W1 are turned off individually using the monitor switch lb of the intercom group W1. OFF.

Further, if there is no screen OFF request in step 1009, but there is a request to display the screen or change the screen display by operating the operation switch group 11, etc., the screen data corresponding to the request is displayed.
Writing to DP and screen transmission starts (Step 1)
010-10 l 5).

On the other hand, if there is no screen display or change request at step 10, step 1012 indicates that the operation switch 1l in the operation switch group 11 was operated in response to the screen display mode.
A control signal is sent to the terminal unit at the address corresponding to control type a defined by a-1id, and control is performed.

FIG. 12 is a flowchart showing the control operation of the television monitor in the intercom base unit 1.

When a monitor control signal is input to the transmitting/receiving section 1g of the base unit by operating the monitor switch 1b, the television monitor la is controlled in an ON/10FF manner (steps 2000 to 2002).

Also, intercom group l! Monitor switch lb of l or operation switch 11&~l of operation switch group 11
If is not operated, the TV monitor 1a does not change (step 2004>), but if the monitor switch 1b is operated, if the TV monitor 1a has been continuously energized, the TV monitor 1a is turned off and the image transmission is stopped. A screen OFF signal is sent to the unit 2. Conversely, if the TV monitor 1a is currently in the OFF state, a request signal for displaying the initial screen is sent to the image transmitting unit 2.
to turn on the monitor 1a.

Furthermore, if the monitor switch 1b is not operated in step 2005, a control code corresponding to the operated switches lla to Ild from the operation switch group 11 is sent out to control the corresponding control terminal unit.

[Effects of the Invention] The system of the present invention is configured such that the operating status of the control equipment in the system detected through the multiplex transmission terminal unit can be converted into a computer image by the image transmission unit and displayed on the monitor TV of the intercom base unit. Therefore, there is no need to provide an image creation function for each intercom base unit,
Therefore, the total cost of the system is reduced, the configuration is simplified, and the reliability of the system is improved.

In the improved system of the present invention, a computer image corresponding to the operating state of the control equipment in the system is generated by an image generation unit provided according to the type of control, and the generated image information is generated by the first child modulation method. By selectively demodulating this modulated signal, which is sent to the video signal line, the intercom base unit side can simultaneously display different control information on the monitor TVs of multiple intercom base units in the system. It is also extremely beneficial when used in systems.

Also, a multiplex transmission terminal unit including an electric lock control unit for controlling an electric lock, '11! For devices that include a security signal unit that inputs security signals such as fire alarms and security sensors, it is convenient because you can also monitor electric locks and security through the monitor TV of the intercom base unit.

Furthermore, at least one or more cameras are installed in each corner of the multiplex transmission terminal unit, and the surveillance video in the system inputted by this camera is taken into the image transmission unit and displayed as it is on the monitor TV of the intercom base unit. Alternatively, a composite image is created by combining it with a computer image taken into the image transmitting unit and representing the operating status of each control device in the system, and this created composite image is displayed on the intercom a. If the system is equipped with a camera that corresponds to a fire detector, it will be possible to display the situation at the scene of a fire on the spot when a fire detector is activated, so it will be useful when used as a monitoring system. A highly reliable system can also be obtained.

[Brief explanation of the drawing]

Figure 1 is a basic configuration diagram of the system of the present invention, Figure 2 (a)
- (C) are explanatory diagrams when display control is performed through the TV monitor of the intercom base unit, Figures 3 (a) and (b)
) is a display example of the monitor screen in simultaneous display mode, FIG. 4 is a block diagram of the image transmission unit, FIG. 5 is a block diagram showing the configuration of the main parts of the intercom base unit with monitor TV, and FIG. Figures (aL (b) and Figure 7 (a>,
(b) is a diagram showing an example of a signal format in a time-division multiplexed signal, FIG. 8 is a block diagram of an image transmission unit when performing multiplex modulation, and FIG. 9 is a diagram of the basic configuration of the improved system of the present invention. , FIG. 1θ is a block configuration diagram of the image transmitting unit, FIG. 11 is a flowchart showing the control operation of the image transmitting unit when display control is performed in the system of the present invention, and FIG. 12 is a control operation of the intercom base unit. Flowchart, FIG. 13 shows a block diagram of a conventional system, and FIG. 14 shows a block diagram of a camera switching unit in the conventional system. Explanation of C code No. 3 Sachi 4 ・ Work l j Struggle ld ・ 2, 9゜21゜22゜jll fist e-Φ ・Multiple transmission controller ・Door phone hanger ・Intercom main unit with monitor TV ・Demodulation circuit 1O ・・Image transmission unit 9ri ・Image generation unit 92 ・Modulation circuit ・Multiple signal transmission line ・Video signal transmission line ・Camera

Claims (1)

[Scope of Claims] 1) A multiplex transmission controller, a multiplex transmission terminal unit attached to a relay control unit that turns on/off a door intercom slave unit, an intercom base unit with a monitor TV, a lighting fixture, etc., and an image transmission unit. an image display control system configured by connecting the intercom base unit with a monitor TV and the image transmitting unit via a video signal transmission line,
The operating state of the control equipment in the system detected through the multiplex transmission terminal unit is generated as a computer image in the image transmission unit, and the generated computer image is displayed on the monitor TV of the intercom base unit. An image display control system characterized by: 2) The image transmission unit includes a plurality of image generation sections that generate the control states of control devices in the system as computer images according to the control type, and a plurality of image generation sections that have different modulation frequencies corresponding to these image generation sections. The computer image generated by the image generation section is configured to be sent to the video signal transmission line using a frequency multiplex modulation method, and the other intercom base unit is configured to transmit the computer image generated by the image generation section to the video signal transmission line. The image display control system according to claim 1, further comprising a demodulation section that can selectively receive the computer images generated by the respective image generation sections. 3) The image display control system according to claim 1, wherein the multiplex transmission terminal unit includes an electric lock control unit for controlling an electric lock. 4) The image display control system according to claim 1, wherein the multiplex transmission terminal unit includes a security signal input unit for inputting a security signal from an electric fire alarm, a security sensor, or the like. 5) At least one or more cameras are provided in any of the multiplex transmission terminal units, and the surveillance video in the system inputted by this camera is taken into the image transmission unit and displayed as it is on the monitor TV of the intercom base unit. Alternatively, a composite image is created by combining it with a computer image taken into the image transmission unit and representing the operating status of each control device in the system, and this created composite image is displayed on the intercom base unit. The image display control system according to any one of claims 1 to 4.