JP2691419B2 - Image display control system - Google Patents

Description

The present invention relates to an image display control system used by being incorporated in an intercom system with a television monitor.

[Prior Art] An intercom system with a monitor TV has been developed, which receives video signals from a camera attached to an intercom subunit and receives them from the intercom base unit while watching visitors such as a monitor TV. There are many types of such systems, ranging from home-use to large-scale systems for buildings, and additional functions are becoming more diverse.

By the way, in such a system, when a visitor operates a call button of an intercom subunit provided in each of a plurality of intercom subunits, the appearance of the visitor is displayed on the monitor TV of the intercom base unit with the monitor television provided in the dwelling unit. When a picture is displayed and a call is made, and when a fire detector issues a warning and a security signal is detected, a computer image corresponding to the detected security signal is displayed on the monitor television.

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

In the figure, 100 ... is an intercom base unit II with a monitor TV installed in a dwelling unit, which can display the security signals and control states of terminals in addition to the video signals of the camera by converting them into computer images for display. Yes, but 10
1 ... is an intercom base unit I with a monitor TV capable of displaying only the video signal transmitted from the camera.

Further, 102 is a camera switching unit, and 103 is an intercom subunit.
It is a camera installed in correspondence with 105, and it is installed at the entrance. 104 is a multiplex transmission controller for multiplex controlling the multiplex transmission terminal device, and 106 is the camera switching unit 1
Distributor for distributing and supplying the video signal from 02 to each parent device 101 and the parent device 100, 107 displays an alarm such as a fire and an alarm display according to a signal from the security signal input unit 110 to which a fire sensor or the like is connected. Alarm display unit, 10
Reference numeral 8 denotes a relay control unit that performs lighting control and the like, 109 denotes an electric lock control unit that controls an electric lock, and these all constitute a multiplex control terminal unit, and multiplex signal transmission from the controller 104 by a time division method. It is controlled by the control signal sent to the line 1, and the video signal from the camera 103 is transmitted to the master device 101 and the master device 100 by the video signal transmission line 1 configured by a coaxial cable or the like.

To explain the basic operation of such a system,
When a visitor operates one of the call buttons 105a of the intercom subunit 105, the camera 1 installed in correspondence with the intercom subunit 105
03 is driven, the appearance of the visitor is converted into a video signal by the camera 103, and is transmitted to each intercom master device 101 and the master device 100 through the coaxial cable 1 and the distributor 106 to display an image and the master device. A ringing tone is output from 101 and base unit 100.

Therefore, when the master device 101 or the master device 100 responds to this ringing sound, all the TV monitors of the master devices other than the one that responded are turned off, and thereafter, the video transmission between the responding master device and the slave device 105. And a call is made.

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

In this camera switching unit 102, the transmitter / receiver 102b receives the multiplex signal transmitted from the multiplex signal transmission line 1, discriminates the child device 105 on which the call button 105a is operated, and drives the camera switching unit 102a. The camera 103 is selected so that the driven video signal from the camera 103 is transmitted to the master side through the video signal transmission line 1.

Further, in the parent device 100 of the above system, it is possible to control the terminal device such as the control of the electric lock and the lighting device by the operation switch 100b. When the monitor TV 100a is turned on by operating the operation switch 100d of the master unit 100 shown in Fig. 13, a computer image created inside the master unit 100 is displayed on the monitor TV 100a, and the operation switch 100b is operated according to the instruction menu on the screen. By operating, the control device in the system can be controlled through the multiple control terminal unit such as the relay control unit 108 or the electric lock control unit 109.

By the way, in such an intercom base unit,
The base unit 101 capable of displaying only a camera image is relatively inexpensive, but cannot display an alarm or a control state. On the other hand, when the master unit 100 monitors and controls the terminal device, a unit for creating a computer image is required for each of the intercom master units 100 with monitor TVs installed in plural units. If only the alarm display and the monitoring are separately performed, it is necessary to add a dedicated unit, the system cost is increased, and the system is desired to be improved.

Also, when constructing such a system,
When the number of control devices or the number of control terminal units increases, there is a demand for multiple intercom master units to control different control devices in the system at the same time or to display the operating states of different control devices in the system at the same time. In this case, if the conventional method of adding a unit for generating a computer image to the intercom master side is adopted, there is a problem that not only the system configuration becomes complicated but also the cost increases, and A countermeasure is desired.

[Problems to be Solved by the Invention] A system of the present invention proposed to solve the above problems has a configuration in which a computer image is created inside an image transmission unit and the created computer image is transmitted to each intercom master unit. By doing so, it is an object of the present invention to provide an image display control system with reduced system cost.

[Means for Solving the Problems] In order to achieve the above-mentioned object, a first aspect of the present invention proposed is a multiplex transmission controller, a control unit such as an intercom slave unit, an intercom master unit with a monitor TV, and a lighting fixture. And a multi-transmission terminal unit attached to the control device in the system including a multi-signal transmission line, and an image transmission unit connected to the above intercom base unit with monitor TV by a video signal transmission line. In the image display control system, the operating state of the control device in the system transmitted from the multiplex transmission terminal unit is generated as a computer image in the image transmission unit, and the generated computer image is generated by the intercom master unit. The feature is that it is displayed on a monitor TV.

Further, in a system obtained by improving such a basic system, the image transmission unit includes a plurality of image generation units that generate the control state of the control device in the system as a computer image according to the control type, and these image generation units. Having a plurality of modulation circuits of different modulation frequencies corresponding to the image generation unit, the computer image generated by the image generation unit is configured to be sent to the video signal transmission line by a frequency multiplex modulation method, The other intercom master unit has a demodulation unit capable of selectively receiving the 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 for controlling an electric lock in the multiplex transmission terminal unit, and further, in the multiplex transmission terminal unit, security such as an electric fire alarm and a security sensor can be provided. It can be configured to include a security signal input unit for inputting a signal.

In a further improved system, 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 the cameras is
Captured in the image transmission unit and directly displayed on the monitor TV of the intercom base unit, or captured in the image transmission unit and synthesized with a computer image showing the operating state of each control device in the system to create a synthesized image. The composite image thus created is displayed on the intercom master unit.

[Operation] In the basic system of the present invention, the computer image according to the operating state of the control device in the system is generated by the image transmission unit provided in common, and is displayed on the monitor television of the intercom master unit.

In the improved system of the present invention, the computer image according to the operating state of the control device in the system is generated by the image generation unit provided according to the type of the control, and the generated image information is obtained by the multiple modulation method. It is sent to the video signal line, and the intercom master unit side can simultaneously display different control information on the monitor televisions of a plurality of intercom master units in the system by selectively demodulating this modulated signal.

In addition, in the multiplex transmission terminal unit that includes an electric lock control unit that controls an electric lock and a security signal input unit that inputs a security signal such as an electric fire alarm or a crime prevention sensor, You can also monitor electric locks and security through the monitor TV of the machine.

Further, at least one or more cameras are provided in any of the multiplex transmission terminal units, and the monitoring image in the system input by the cameras is taken into the image transmitting unit and directly displayed on the monitor TV of the intercom base unit, Alternatively, a system in which the image is transmitted to the image transmission unit and is combined with a computer image showing the operating state of each control device in the system to create a composite image, and the created composite image is displayed on the intercom master unit. In the case where the camera is provided in correspondence with the fire detector, the state of the fire occurrence site can be displayed on the spot when the fire detector is issued.

Embodiment An embodiment of the system of the present invention will be described below with reference to the drawings.

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

In the figure, 1 is an intercom base unit with a monitor TV,
Reference numeral 2 is an image transmission unit for generating a computer image according to control information sent from a multiplex transmission terminal unit in the system, 3 is a multiplex transmission controller, 4 is an intercom subunit installed at a front door, and 5 is an image transmission unit. A distributor for transmitting the computer image generated by 2 to each intercom master unit 1 by a coaxial cable l,
6 is a relay control unit for turning on and off control equipment such as lighting equipment and air-conditioning equipment, 7 and 8 are electric lock control units that are added as necessary, and fire detectors and security sensors, etc. 2 shows a security signal input unit for detecting the security signal of the.

As shown in the figure, the multiplex transmission controller 3 includes a multiplex transmission terminal unit such as an intercom subunit 4, an intercom master unit 1, an image transmission unit 2, a relay control unit 6 and an image transmission unit 2 and a multiplex transmission line 1 (one pair). The image transmission unit 2 and each intercom master unit 1 ... Are connected by a video signal transmission line 1 formed of a coaxial cable or the like.

The basic operation of this system will be described. When a visitor operates the call button 4a of the intercom subunit 4 provided at the entrance or the like, the intercom master units 1 are simultaneously called through the multiplex transmission controller 3. Then, when any of the intercom base units 1 ... Picks up the handset 1c and responds, a call is made between the called slave unit 4 and the intercom base unit 1 that responded.

On the other hand, when the monitor switch 1b on the intercom base unit 1 side is operated, the monitor TV is turned on, and a control menu as shown in FIG. 2 (a) for selecting and controlling the control device in the system is displayed from the image transmitting unit 2 to the base unit. 1 and is displayed on the screen of the monitor television 1a.

Of the items displayed on this screen, for example, when performing lighting control, the switch 11a corresponding to the screen display in the operation switch group 11 is operated. Then, monitor TV 1a
The screen related to the lighting control as shown in FIG. 2B is displayed instead of.

This screen shows the current operating state of the lighting fixtures installed in the system (in Fig. 2 (a), all the lighting fixtures are ON). For example, if you want to turn off the lights in the living room, , Operation switch 11c corresponding to the living room screen
When is operated, the screen changes as shown in Fig. 2 (c),
You can see that the lighting in the living room has been turned off.

When the lighting of the living room is turned on again, it is performed by operating the operation switch 11c again, and when controlling the chandelier between the reception room, the downlight between the reception room, and the streetlight, it is provided corresponding to each display position. It suffices to operate the operation switches 11a, 11b, 11d.

Thus, in the system of the present invention, the display control of the control device is performed by operating the operation switch instructed by the screen display of the monitor review 1a of the intercom master unit 1, and the erroneous operation causes the confirmation display to be displayed on the screen. Become.

3 (a) and 3 (b) show a display example of the screen in the simultaneous display mode, which is generated by the image transmitting unit 2 when the security signal input unit 8 detects a fire signal. The example which displayed the computer image on the monitor television 1a of the intercom main | base station 1 is shown.

When a fire sensor provided in a dwelling unit issues a warning, a security signal is input to the multiplex transmission controller 3 through the security signal input unit 8. In the image transmission unit 2, a computer image (fire information of a room in which a fire has occurred) is generated according to the security signal at this time, and the image transmission unit 2 outputs all computer 1
A broadcast signal for energizing the monitor televisions 1a of ... Is sent, and all the monitor televisions 1a of the parent devices 1 ...
Display the image on.

Since the occurrence of a fire is emergency information, even if the monitor switch 1a of the intercom master unit is turned off, the monitor television is forcibly turned on and a simultaneous display is performed.

The example of FIG. 3 (a) shows an example of the case where a fire occurs in the living room, and when the alarm signal is stopped, it is performed by operating the operation switch 11a according to the screen, but the alarm is not provided separately. The alarm notification, which is further amplified and output from the alarm device provided, is performed by operating the operation switch 11b according to the screen.

On the other hand, FIG. 3 (a) shows a screen display when the parent device 1 does not have a switch display function. In this case, the parent device 1
By operating an operation switch (not shown) separately provided in the, necessary operation such as alarm stop is performed. The intercom master unit in the system of the present invention may have such a configuration.

FIG. 4 shows the image transmission unit 2 in the system of the present invention.
FIG. 2 is a block diagram showing an internal configuration of the device.

In the figure, 2a is an image data RO storing image data to be output according to a control signal from each multiplex transmission terminal unit.
In M, image data created according to the type of control and monitoring is stored in advance.

Reference numeral 2b is a program ROM, and 2c is a RAM for storing the information sent from the multiplex transmission terminal unit for each address. These memories are connected to the host CPU 2d for processing. Also, the multiplexed signal from the multiplexed signal transmission line 1 is transmitted / received by the transmitter / receiver 2e.
The video display processor 2g receives the video signal temporarily stored in the video RAM 2h, creates a computer image, and transmits the computer image to the base unit 1 through the video signal transmission line 1. In this embodiment, the image generation unit 21 is configured by combining the video display processor 2g with the video RAM 2h. However, when it is necessary to modulate and transmit the generated image data, the modulation circuit 2f (wavy line display). ) Is provided.

Further, FIG. 5 shows an intercom base unit 1 with a TV monitor.
It is a block diagram of a main part configuration of. In the figure, the video signal transmitted through the video signal transmission line 1 is a demodulation circuit.
1d (When a modulation circuit is provided on the image transmission unit side (8th
(Refer to the drawing), the video signal processing circuit is provided correspondingly.
It is displayed as an image on the monitor section 1f through 1e, while
The signal of the operation switch group 11 is transmitted from the transmission / reception unit 1g to the image transmission unit 2 through the logic circuit unit 1h, and the video signal of the screen corresponding to the operation of the operation switch 11 is returned.

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

There are methods such as time division multiplex transmission and frequency multiplex transmission for the multiplex transmission. As an example, the multiplex signal in the case of time division transmission includes a start pulse, an address part, a control signal part as shown in FIG. , And a transmission signal section.

This multiplex transmission system uses each multiplex transmission terminal unit (in this embodiment, a relay control unit 6, an electric lock control unit 7, a security signal input unit 8, an intercom master unit 1, an intercom slave unit 4, an image transmission unit 2, etc.). The address is assigned to the address), and the multiplex transmission controller 3 constantly performs polling access.

That is, the multiplex transmission controller 3 sequentially outputs control signals with addresses to all terminal units,
(See FIG. 6 (a)) In the terminal unit having the matched address, the control signal is decoded and the control operation is performed, and the reply signal indicating the operation state is transmitted to the multiplex transmission controller 3 side (FIG. 6 ( See b)).

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

When any one of the operation switches 11 of the intercom base unit 1 is operated, an interrupt is made by a specific bit of the address signal section, and the multiplex transmission controller 3 performs necessary control for a corresponding control device. When this control ends, polling access continues from the state at the time of interruption.

The data indicating the operation state from such a terminal unit is stored in the RAM in the multiplex transmission controller 3 for each terminal unit.
And stored in the RAM in the image transmission unit 2. This data is constantly updated in response to polling access and is stored as the latest data.

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

FIG. 7 is a diagram showing an example of control allocation 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 returned from each terminal unit to the multiplex transmission controller 3 is also composed of 8 bits. For example, monitor ON / OFF control is defined by the 0th bit and 1st bit of the control signal section. If the 0th bit is the "H" level, the monitor turns on and the 1st bit is the "H" level. If the monitor is off
In other cases, control is not performed (see FIG. 7 (a)).

On the other hand, the 8th bit of the transmission signal section turns the monitor ON / OFF.
The state is defined, and the operating states of the operating switches 1 to 4 are defined by the 0th bit to the 3rd bit (Fig. 7 (b)).
reference).

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

In this system, a plurality of video signals are multiplexed and modulated with a plurality of carrier waves and transmitted.

FIG. 8 is a block diagram showing an internal configuration of the image transmission unit 9 which employs such a frequency multiplex modulation method.

In this image transmission unit 9, the video display processors 9g (1) to (n) and the video RAM 9h (1) to
N image generation units 91, which are configured by combining (n)
.. and n modulation circuits 9f (1) to (n) 92 ... Provided corresponding to these image generation units 91 ... Are provided, and each image generation unit 91 ... , Generate image data according to the control type of the control device in the system, the type of monitoring information (for example, security information, control information of lighting equipment, air conditioner, control of electric lock, etc.), and the modulation circuit 92 ...
In the above, the image data generated by the image generator is sent to the video signal transmission line 1 by frequency multiplex modulation.

In this method, each intercom base unit 1 needs a demodulation circuit capable of selectively demodulating a plurality of modulated waves from the modulation circuits 9f (1) to (n) 92 ... Of the image transmission unit 9. A transmission line for multiple signals can be a set of signal lines as in the time division method.

Therefore, in the image transmitting unit 9, even when a plurality of intercom master devices 1 ... Requests to display different types of images, the information requested by each intercom master device is displayed simultaneously. It can be confirmed or controlled.

FIG. 9 is a diagram showing the configuration of a further improved system of the system of the present invention.

In the present embodiment, the image transmission unit 10 has a built-in camera switching unit, and in addition to the computer image, the image from the camera 12 can be transmitted to the base unit 1 side, which is different from the basic system described above. . Therefore, the same parts are designated by the same reference numerals and the description thereof is omitted.

FIG. 10 is a block diagram showing an internal configuration of the image transmission unit 10. In the figure, 12 is a plurality of cameras provided according to the installation location of the intercom subunit 4 or the fire sensor, and 10 is an image transmission unit incorporating a camera switching unit 10k.

For example, when a video image of a camera corresponding to a specific sensor is displayed on the monitor television 1a of the master device 1 by the control signal from the multiple signal transmission line 1, the operation is as follows. When a fire detector installed in the room issues a warning, this signal is sent to the transmission / reception section of the multiplex transmission controller 3 and the image transmission unit 10.
Input to 10e. The transmitter / receiver 10e receives the multiplex signal, the host CPU 10d processes the signal, the camera switching unit 10k selects a camera to be driven, and the camera 12 is driven. The video signal from the camera 12 is output to the video signal transmission line 1 through the sync separation circuit 10c, the image synthesis circuit 10j, the video processing circuit 10i and the modulation circuit 10f.

Further, when a computer image is required at the same time, the multiple signals are discriminated by the host CPU 10d, a computer image is created by the video RAM 10h and the video display processor 10g, and the computer image is synthesized with the video signal from the camera through the image synthesis circuit 10j. It

Therefore, even if a fire occurs during the reception with the visitor, the alarm is displayed on the screen of the monitor television, so that prompt action can be taken.

FIG. 11 is a flow chart showing the operation of the image transmission unit 2 (9, 10) of the present invention. The operation will be described with reference to the figure. The image transmission unit 2 constantly monitors the signal of the multiplex signal transmission line l, and when the received signal is transmitted, the address signal unit determines whether the signal is from the intercom master unit. It is determined (steps 1000 and 1001).

If the signal is not the signal from the intercom base unit 1 but the security signal from, for example, a fire detector, the data indicating the operating state of the corresponding terminal unit provided in the image transmission unit 2 is updated (step 1002), and the step Ten
The routine proceeds from 03 to step 1005, where it is determined whether or not the data signal requires simultaneous display.

When the simultaneous display is required, the new simultaneous display mode is set, and after the necessary image data among the image data stored in the image data ROM 2a in advance is written in the video display processor (VDP), all intercom base units 1・
..Turning on monitor TV 1a ... of RAM2 and displaying screen data according to the type of control and monitoring that should be displayed at that time in RAM2
Store in c (steps 1006 to 1008).

On the other hand, if the image transmitting unit 2 is already transmitting the related screen corresponding to the received signal in step 1003, the screen data is updated in step 1004 to display the next screen.

On the other hand, when the address of the intercom master unit 1 is determined in step 1001, the screen OFF request (of the monitor switch OF
F) is discriminated, and if there is an OFF request, transmission of images is stopped,
Only in the simultaneous display mode, the monitors 1a ... of all the intercom base stations 1 ... are turned off (step 100).
9-1018) is not in the simultaneous display mode, the monitor 1a is individually operated by the monitor switch 1b of the intercom master unit 1.
Turn off.

If there is no screen OFF request in step 1009 and there is a screen display or a screen display change request by operating the operation switch group 11, the screen data corresponding to the request is written to the VDP and the screen transmission is started. (Steps 1010 to 101
Five). On the other hand, if there is no screen display or change request in step 1010, the operation switches 11a to 11d in the operation switch 11 group operated in response to the screen display mode in step 1012.
The control signal is transmitted to the terminal unit having the address corresponding to the control mode defined by the control.

FIG. 12 is a flowchart showing the control operation of the television monitor in the intercom master unit 1. When a monitor control signal is input to the transmitter / receiver 1g of the master unit by operating the monitor switch 1b, the television monitor 1a is ON / OFF controlled accordingly (steps 2000 to 2002). If the monitor switch 1b of the intercom base unit 1 or the operation switches 11a to 11d of the operation switch group 11 is not operated, the television monitor 1a does not change (step 200
4) When the monitor switch 1b is operated, the TV monitor 1a
The TV monitor 1a is turned off and the screen is turned off for the image transmission unit 2 when the power is continuously turned on.
The signal of is transmitted. On the contrary, the TV monitor 1a
Is OFF, a request signal for displaying the initial screen is sent to the image transmission unit 2 to turn on the monitor 1a.

Further, when the monitor switch 1b is not operated in step 2005, the control code corresponding to the operated switches 11a to 11d in the operation switch group 11 is transmitted to control the corresponding control terminal unit.

[Effect of the Invention] In the system of the present invention, the operation state of the control device in the system detected via the multiplex transmission terminal unit can be converted into a computer image by the image transmission unit and displayed on the monitor television of the intercom master unit. Therefore, it is not necessary to provide an image creation function for each of the intercom base units, thus reducing the total cost of the system.
Since the configuration is simplified, the reliability of the system is improved.

In the improved system of the present invention, the computer image according to the operating state of the control device in the system is generated by the image generation unit provided according to the type of the control, and the generated image information is obtained by the multiple modulation method. It is sent to the image signal line, and on the interphone master side, by selectively demodulating this modulated signal, different control information can be simultaneously displayed on the monitor TVs of a plurality of intercom masters in the system, which is a large scale. It is also extremely useful when used in a system.

In addition, in the multiplex transmission terminal unit that includes an electric lock control unit that controls an electric lock and a security signal input unit that inputs a security signal such as an electric fire alarm or a crime prevention sensor, It is convenient because you can monitor electric locks and security through the monitor TV of the machine.

Further, at least one or more cameras are provided in any of the multiplex transmission terminal units, and the monitoring image in the system input by the cameras is taken into the image transmitting unit and directly displayed on the monitor TV of the intercom base unit, Alternatively, a system in which the image is transmitted to the image transmission unit and is combined with a computer image showing the operating state of each control device in the system to create a composite image, and the created composite image is displayed on the intercom master unit. With a configuration that has a camera corresponding to the fire detector, the state of the fire occurrence site can be displayed on the spot when the fire detector is issued, so even when used as a monitoring system A reliable system can be obtained.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of the system of the present invention, and FIG. 2 (a).
~ (C) is an explanatory view when the display control is performed through the TV monitor of the intercom base unit, Figs. 3 (a) and (b) are display example diagrams of the monitor screen in the simultaneous display mode, and Fig. 4 is an image. FIG. 5 is a block diagram of the transmitting unit, FIG. 5 is a block diagram showing the configuration of the main part of the intercom master unit with monitor TV, FIGS. 6 (a) and 6 (b) and FIGS. 7 (a) and 7 (b).
Is an example diagram of a signal format in a time division multiplexed signal,
FIG. 8 is a block diagram of the image transmitting unit in the case of performing multiplex modulation, FIG. 9 is a basic diagram of the improved system of the present invention, FIG. 10 is a block diagram of the image transmitting unit, and FIG. Is a flow chart showing the control operation of the image transmission unit when performing display control in the system of the present invention, FIG. 12 is a flow chart showing the control operation of the intercom master unit, FIG. 13 is a configuration diagram of a conventional system, and FIG.
The figure shows a block diagram of a camera switching unit in a conventional system. [Description of symbols] 3 ... Multiplex transmission controller 4 ... Doorphone subunit 1 ... Intercom master unit with monitor TV 1d ... Demodulation circuit 2,9,10 ... Image transmission unit 21,91 ... Image generation unit 22 , 92 …… Modulation circuit 1 …… Multiple signal transmission line 1 …… Video signal transmission line 12 …… Camera

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location H04M 11/00 301 H04M 11/00 301

Claims (5)

(57) [Claims] 1. A multiplex transmission controller, an intercom subunit,
The intercom master with monitor TV The above-mentioned intercom master with monitor TV is connected with the multiplex transmission terminal unit, which is attached to the relay control unit for turning on / off the lighting equipment and the like, and the image transmission unit by the multiplex signal transmission line. An image display control system configured by connecting a display device and the image transmission unit with a video signal transmission line, wherein the operation state of the control device in the system detected via the multiplex transmission terminal unit, An image display control system characterized in that a transmission unit generates a computer image, and the generated computer image is displayed on a monitor television of the intercom master unit. 2. The image transmission unit, wherein a plurality of image generation units for generating a control state of a control device in the system as a computer image according to the control type and modulation frequency corresponding to these image generation units. Having a plurality of different modulation circuits, the computer image generated by the image generation unit is configured to be sent to the video signal transmission line by the frequency multiplex modulation method, and the other intercom master unit is the image The image display control system according to claim 1, further comprising a demodulation unit capable of selectively receiving the computer images generated by the respective image generation units of the transmission unit. 3. The image display control system according to claim 1, wherein said multiplex transmission terminal unit includes an electric lock control unit for controlling an electric lock. 4. A security signal input unit for inputting a security signal such as an electric fire alarm or a security sensor is included in the multiplex transmission terminal unit.
The image display control system described. 5. One of the multiplex transmission terminal units,
At least one camera is provided, and the monitoring image in the system input by this camera is captured in the image transmitting unit and directly displayed on the monitor TV of the intercom master unit, or is captured in the image transmitting unit in the system. 5. A composite image is created by synthesizing with a computer image showing the operating state of each control device, and the created composite image is displayed on the intercom master unit. The image display control system according to the section.