JP2516527B2 - Control device for audiovisual equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various kinds of audiovisual equipment equipment installed in an audiovisual room or a conference room, for example, an audiovisual equipment equipment for integrally controlling a curtain, a projector, a TV camera, a screen, a lighting equipment and the like. Control device.

[0002]

2. Description of the Related Art Conventionally, a control device for this kind of audiovisual equipment equipment includes an integrated control circuit A and various equipment equipment B1 to Bn (n:
It is classified into two types, a centralized management system and a distributed processing system, based on the difference in connection system with arbitrary integers. As shown in FIG. 12, the control device of the audiovisual equipment equipment by the centralized management system is as follows.
Integrated control circuit A and all equipment B (screen, VT
R, 8 mm projector, dark curtain, etc.) are directly connected. Therefore, the various equipment B is directly controlled by the integrated control circuit A and exhibits excellent responsiveness in its operation. Further, since it is only necessary to directly output commands and data to the target to be controlled, there is an advantage that software development can be intuitively performed.

On the other hand, in the control device for distributed audiovisual equipment, as shown in FIG. 13, the integrated control circuit A and the equipment B are indirectly connected via a communication bus C. Therefore, this system has the advantages that the equipment B can be easily added without being restricted by the hardware of the integrated control circuit A, and the routing of connection lines can be simplified.

[0004]

However, the above-described conventional type of control device for audiovisual equipment has the following problems, which enables rapid control of a large group of equipment and is highly flexible. The system could not be built. The control device of the audiovisual equipment equipment by the centralized management system has a problem that the wiring becomes complicated as the number of equipment equipment B to be controlled increases. For example, it was not uncommon for more than 100 wires to be connected when a dozen or more devices were connected. In addition, to add new equipment B, the integrated control circuit A
It is necessary to modify the hardware such as adding more connection ports.

On the other hand, the control device of the audiovisual equipment equipment of the distributed processing system can solve the drawbacks of the centralized management system described above, but as the equipment equipment B to be controlled increases, communication information is transmitted via the communication bus C. Volume increases and communication time increases. Therefore, the response time from the operation of the integrated control circuit A to the operation of the desired equipment B becomes long, and the operability deteriorates.

Further, in both types of control devices for audiovisual equipment, an increase in the equipment B to be controlled leads to an increase in the amount of information to be processed by the integrated control circuit A, so that a system of a certain scale or more is constructed. Requires an expensive and large computer as the integrated control circuit A. The control device for audiovisual equipment of the present invention solves these problems and can easily cope with the construction of a large-scale system and the addition of equipment, and all equipment can be quickly and accurately processed. It was made for the purpose of realizing excellent operability that can be controlled, and has the following configuration.

[0007]

A control device for audiovisual equipment according to the present invention is a control device for controlling audiovisual equipment that operates in response to an operation signal input from an operating section.
An integrated control circuit that converts an integrated operation signal input from an integrated operation unit into a predetermined control signal corresponding to the operation of the audiovisual equipment, and outputs the control signal to a system bus; and the audiovisual equipment. An equipment connection unit connected to the operation unit, a control signal input unit connected to the system bus to input the control signal, and the control signal input from the control signal input unit to the system bus. An interface circuit that has a control signal output unit and decodes the control signal input from the control signal input unit into the operation signal and outputs the operation signal to the device connection unit.

In communicating the control signal between the integrated control circuit and the interface, a circuit identification signal may be determined for each interface circuit, and the circuit identification signal may be added immediately before or after the control signal and output. Good. Further, the communication between the integrated control circuit and the interface is not limited to a signal in which information is associated with a change in voltage value, and a signal in which information is associated with a change in current value may be used.

[0009]

In the controller for audiovisual equipment according to the present invention having the above-described structure, the only information to be processed by the integrated control circuit is the control signal corresponding to the operation of the integrated operation section. When the control signal is output to the system bus, the interface circuit corresponding to the control signal can convert the control signal into an operation signal for operating the audiovisual equipment and control the audiovisual equipment. .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In order to further clarify the structure and operation of the present invention described above, a preferred embodiment of the control device for audiovisual equipment according to the present invention will be described below. FIG. 1 is a block diagram of the entire configuration of a control device (hereinafter, referred to as a facility device control device) 1 for an audiovisual facility device according to an embodiment. As shown in the figure, the equipment control device 1 of the present embodiment includes an integrated control circuit 1
0 and a plurality of interfaces 50, 60, 70 connected to the integrated control circuit 10 via the system bus SB.

The integrated control circuit 10 is an EIA standard RS-.
It is mainly composed of a personal computer (hereinafter referred to as a PC) 11 equipped with a 232C serial interface port as standard equipment. That is, the PC 11 includes an MPU 12 that executes a logical operation, a ROM 14 that stores various programs and data in a nonvolatile manner, a RAM 16 that is a storage element that allows random access of information, and data that is input / output to / from an external circuit. An input / output interface 18 for matching and controlling the timing and an RS-232C serial interface 20 described above are provided. As is well known, the RS-232C serial interface has a maximum communication distance MD = 15 m and a connection form 1:
1. The transmission method is a voltage unbalanced communication method.

In addition, the integrated control circuit 10 is provided with an integrated operating section 30 and a system bus interface 40. The integrated operation unit 30 includes various input / output devices including an input unit for instructing the operation of various audiovisual equipment devices connected to the interfaces 50 to 70 and a display unit for displaying the current state of the various audiovisual equipment devices. It is composed of
In the equipment control device 1 according to the present embodiment, the following four steps are performed so that an operation command according to the place can be easily issued from a plurality of places.
The integrated operation unit 30 is composed of various input / output devices.

The touch panel 32 CRs an image based on the image data input from the input / output interface 18.
CRT controller 32B and C projected on T32A
Touch sensor 32 mounted on the screen of RT32A
It is composed of C and. Here, the CRT controller 32
B is a controller that inputs image data that visualizes the current state of various equipment and operation commands that can be input from the PC 11, and controls the deflection coil of the CRT 32A and the electron gun based on the image data to execute image display. is there. The touch sensor 32C is a pointing device that converts the position of the finger touching the screen of the CRT 32A into a signal and outputs the signal to the input / output interface 18. Therefore, by using the touch panel 32, the operation command can be issued reliably and accurately while checking the image displayed on the CRT 32A.
Can be entered.

The keyboard 34 is an input device in which a large number of keys are arranged. By increasing the number of keys, various operation commands can be directly input by one operation. Of course,
It is also possible to hold down the number of keys and input various operation commands in a menu format. As will be described later, the keyboard 34 is provided with a plurality of macro keys 34A so that the operator can input a series of operation commands repeatedly executed by one operation of the macro key 34A. .

The remote controller 36 converts a signal corresponding to an operation command into infrared rays or ultrasonic waves and inputs a signal transmitted from the transmitter 36A and the transmitter 36A to reconvert it into an original operation command. And 36B. Since the remote controller 36 can input an operation command wirelessly, it is possible to control the audiovisual equipment without limiting the place.

The plurality of sensors 38 are used in the equipment control device 1.
It is an input device that is appropriately added according to the application, and is provided for controlling the facility device without waiting for the input of an operation command when a certain condition is detected by the sensor 38. For example, when the room entrance sensor detects a room entering the room where the equipment control device 1 is installed, the room lighting LS, which is one of the equipment, is activated to brighten the room.

As will be described later, when an operation command is input from any of the input devices of the integrated operation unit 30, the PC 11 outputs a control signal corresponding to the operation command from the RS-232C interface 20. Also, the interface 50
˜70 transmit various communication signals to the PC 11 via the system bus SB. System bus interface 4
Reference numeral 0 is an interface circuit for assisting communication of the various data described above, which is connected between the RS-232C interface 20 and the system bus SB, and is a signal for changing a current value of a control signal input from the PC 11 side. To the RS232C interface 20. The communication signal input from the interfaces 50 to 70 is converted into a signal whose voltage value changes and is output to the RS232C interface 20.

An electric circuit block diagram of the system bus interface 40 is shown in FIG. As shown, the system bus interface 40 is a Dsub male connector 40A for connection with the RS-232C interface 20.
Also, the Dsub female connector 40B for connection with the system bus SB is simply connected to the inside of the equipment control device 1.

Here, RS via the male connector 40A
The communication with the 232C interface 20 is RS-23.
It is performed by a protocol according to the 2C standard, that is, a communication method using a change in voltage value as a signal. Therefore, the male connector 40 of the system bus interface 40
A is a 232C driver 4 conforming to the RS-232C standard
0C, where signals are modulated / demodulated according to the RS-232C communication system. That is, RS-2
The control signal input from the 32C interface 20 is 2
Demodulated by 32C driver 40C, RS-232C
The communication signal output to the interface is modulated by the 232C driver 40C. The control signal demodulated by the 232C driver 40C is input to the constant current driver 40E via the transmission photocoupler 40D, and is sent from the female connector 40B to the system bus SB as a signal whose current value changes. The transmission photo coupler 40D is a PC
The 232C driver 4 is used to perfect electrical insulation between the interface 11 and the interfaces 50 to 70.
The control signal input from 0C is photoelectrically converted. In this way, the control signal as a change in the current value output from the female connector 40B is accurately transmitted even if the system bus SB has a distance of several hundred meters. That is, it is possible to perform communication in which the maximum communication distance of 15 m according to the RS-232C standard is greatly improved.

On the other hand, a communication signal as a change in current input from the female connector 40B passes through a receiving photocoupler 40F for perfect electrical insulation and a switching circuit 40G for converting current / voltage, and a 232C driver. Input to 40C. With these electric circuits, a communication signal as a change in current value can be converted into a change in voltage value, and a PC according to the RS-232C protocol can be converted.
The communication with 11 becomes possible.

Further, the system bus interface 40
Incorporates a power supply circuit 40H for inputting AC power from a commercial power supply and converting the AC power into DC power having a predetermined voltage. The DC power generated by the power supply circuit 40H is used as the power for each of the electric circuits, while it is output to the system bus SB via the female connector 40B and can be used as the power supply for the interfaces 50 to 70. There is.

Further, the system bus interface 40 incorporates a reset instruction circuit 40I. This reset instructing circuit 40I is used for each interface 50-7.
It is provided to output a reset signal for returning 0 to the initial state. For example, immediately after the system is powered on, the reset signal is output to the interfaces 50 to 70 via the female connector 40B. , The interfaces 50 to 70 are reset to the initial state.

Next, the structure of the interfaces 50 to 70 will be described. These interfaces 50-70 are
It is housed in a box-shaped housing having 3 to 4 Dsub connectors, and the connection and the handling thereof are extremely easy. FIG. 3 shows, as an example, a plan view, a front view, and left and right side views showing the interface 50 by a normal projection method. As shown in the figure, the left side surface of the housing 50A has a Dsub as an input port of the system bus SB.
A female connector (hereinafter referred to as IN connector) 50B and a Dsub female connector (hereinafter referred to as OUT connector) 50C as an output port of the system bus SB are arranged.
Further, on the right side surface thereof, a Dsub female connector (hereinafter referred to as a connection connector) 50 as a connection port for facility equipment is provided.
D is placed. The system bus SB connected to the interface 50 by the IN connector 50B includes a DC power supply line created by the power supply circuit 40H of the system bus interface 40 described above. Therefore, the interface 50 can use the DC power source supplied from the system bus SB, and the power line and other troublesome connections are omitted. It is also easy to add more.

The detailed structure of each of the interfaces 50 to 70 will be described below. FIG. 4 shows an interface 50.
It is an electric circuit block diagram of. As shown in the figure, the interface 50 is a relay output type interface circuit, and its connecting connector 50D has 16 normally open contacts SW1 to SW1.
16 are connected. The IN connector 50B and the OUT connector 50C connected to the system bus SB are connected to the power supply circuit 50E of the interface 50, from which electric power of each electric circuit in the interface 50 is supplied.

The IN connector 50B is used for the input converter 5
It is also connected to the CPU 50G via the 0F. The input converter 50F converts a control signal, which is a change in the current value input from the IN connector 50B, into a voltage value change signal and outputs the signal to the CPU 50G. The CPU 50G also outputs the OUT connector 50 via the output converter 50H.
It is also connected to C. Here, the output converter 50H is
It is a conversion circuit opposite to the input converter 50F, and C
The voltage value change signal input from the PU 50G is converted into a current value change signal and output from the OUT connector 50C.

The IN connector 50B and the OUT connector 50C are connected to the reset circuit 50I,
When a reset signal is input via the system bus SB, the reset circuit 50I operates to restore the CPU 50G and PIO 50L and CTC 50M described later to the initial state.

In addition, the interface 50 includes a CPU
ROM that stores the decryption program executed by 50G
50J, RAM 50K which is a storage element capable of random access to information, parallel input / output interface (hereinafter referred to as PIO) 50L capable of exchanging signals with a plurality of input / output circuits, and timer having three types of interval timers A controller (hereinafter referred to as CTC) 50M, a transceiver 50N that reads the set state of an ID switch 50O that sets an identification code, and two chip selectors 50P and 50Q for selectively activating these many circuit elements are provided. Advanced information processing is possible.

The PIO 50L has ports for three channels, two channels of which are connected to two relay drivers 50R and 50S, and the remaining one channel is an LED driver 50T and a dip switch for performing various settings. 50U (hereinafter referred to as a DIP switch) is connected. The relay drivers 50R and 50S are
A circuit that excites eight relays Ry1 to 8 and Ry9 to 16 in response to a signal from the PIO 50L.
Excitation of these relays determines the open / closed state of the normally open contacts SW1 to SW16 connected to the connector 50D. The LED driver 50T is a circuit that controls lighting of the four LEDs 1 to 4 according to a signal from the PIO 50L, and displays the current internal state of the interface 50 and the like. The DIP switch 50U uses a communication protocol selection setting (for example, an ACK for confirming reception of a control signal).
It is used for (for example, whether or not to transmit a signal), and the setting state thereof is appropriately read by the PIO 50L and transmitted to the CPU 50G.

The other interfaces 60 and 70 have substantially the same structure as the interface 50, and are composed of intelligent circuits equipped with an information processing function centering on a CPU which is a logical operation element. The electric circuit blocks of the interfaces 60 and 70 are shown in FIGS. 5 and 6, respectively. In FIGS. 5 and 6, the same components as the interface 50 are denoted by the same alphabetic characters as those used in FIG. 4 after the two-digit number to avoid duplication of description. .

As shown in FIG. 5, the interface 60 is R
This is an S-232C input / output type interface. Therefore, in addition to the PIO 50L of the interface 50, a serial input / output interface (hereinafter referred to as SIO) 6
It is equipped with 0V and is capable of inputting / outputting serial data. The SIO 60V supports two-channel input / output, and 232C drivers 60W and 60X are connected to each channel. Therefore, the connector 60D of the interface 60 is divided into two Dsub connectors 60DA and 60DB conforming to the RS-232C standard. The DIP switch 60Y peculiar to the interface 60 is for setting communication conditions (for example, baud rate etc.) necessary for carrying out communication conforming to the RS-232C standard, and the setting information is It is input to the equipment device connected to the CPU 60G and the connector 60D via the PIO 60L.

On the other hand, the interface 70 is a photocoupler output type interface as shown in FIG.
Photocoupler drivers 70V and 70W are provided in place of the relay drivers 50R and 50S of the interface 50, and the photocoupler 70 is provided by the respective drivers 70V and 70W.
X and 70Y are driven.

When the equipment control device 1 of the present embodiment configured as described above is installed at a desired location, the following setup work is performed prior to its operation.
First, the ID switch 50P of the interfaces 50 to 70
.About.70P are performed, and the identification codes ID50 to ID70 are determined for each interface so as not to overlap. Next, each connection connector 50D of the interfaces 50 to 70
Connect the audiovisual equipment to be operated to ~ 70D.

Then, the integrated operation section 3 of the integrated control circuit 10
Operate 0 to register the operation of each audiovisual equipment connected to the interfaces 50 to 70. By this registration work, various tables used in the program processing described later are stored. For example, the integrated control circuit 10 outputs the identification code attached to each of the interfaces 50 to 70 in response to the operation command from the integrated operation unit 1: 1 and the input from the integrated operation unit 30. A table of port data to be operated and operation mode data is stored (see FIG. 8). In addition, a table of output data output from the connection connectors 50D to 70D corresponding to the port data and the operation mode data is stored in each of the interfaces 50 to 70 (see FIG. 10).

In the present embodiment, the operation will be described using an example in which the equipment control device 1 is installed in a conference room. FIG.
As shown in FIG. 1, the system includes one integrated control circuit 10
Via the system bus interface 40, two relay output type interfaces 50, one RS-23 each
A 2C input / output type interface 60 and a photocoupler output type interface 70 are connected by a system bus SB. One relay output type interface 5
No. 0 normally open contacts Ry1 to 8 are connected to a dark curtain drive circuit DS, and normally open contacts Ry9 to 16 are connected to a screen drive circuit SM for moving up and down a screen for projecting an image. . Further, the contact output of the other interface 50 is used for all indoor lighting L
S is connected. In the RS-232C input / output interface 60, an optical disk VTR (LDVTR) LD is connected to the Dsub connector 60DA, and a high-definition controller HC is connected to the Dsub connector 60DB. Further, a device having a TTL level remote control input, here, a VTR projector VS and an 8 mm projector MV are connected to the photocoupler output type interface 70.

Next, a method of processing data executed by the integrated control circuit 10 and each of the interfaces 50 to 70 in the equipment control device 1 of the present embodiment configured as described above will be described. FIG. 7 is a flowchart of a control signal output program executed by the PC 11 of the integrated control circuit 10. Note that this control signal output program is a part of the program stored in the ROM 14, and the PC 11 processes other programs at the same time as this control signal output program and, for example, is complicated such as transmitting display information to the touch panel 32. It goes without saying that various controls are executed.

The control signal output program is the integrated operation unit 3
It is a program executed by the MPU 12 when an operation command for instructing the operation of the equipment is input from various input / output devices of 0. When the processing of this program is started, the MPU 12 first inputs its operation command (step 1
00), it is decrypted (step 110). Here, deciphering the operation command means specifying the input / output device to which the operation command is input, specifying the equipment device that is requested to operate by the operation command, and requesting the specified equipment device to operate. Is to interpret.

Then, these decoded operation commands are
It is judged by the operation mode registration work whether or not to instruct a proper operation that matches the operation mode stored in advance in the ROM 14 (step 120), and if the content is judged to be unsuitable, it is unsuitable. A response process (step 130) according to the content is executed, and this program ends. The response process according to the inappropriate content is the touch panel 32.
A process such as displaying a message according to inappropriate content. On the other hand, when it is determined in step 120 that the content of the operation command is valid, the control signal generation process (step 140) is executed, and the control signal generated by the process is output from the RS-232C interface 20. (Step 150) and this program ends.

FIG. 8 is an explanatory view conceptually showing the control signal generation processing executed in step 140.
As shown in the figure, when a valid operation command is input from the integrated operation unit 30, the identification code of the interface to which the audiovisual equipment device instructed by the operation command is connected, the port data of the connection connector, and the operation mode are determined. The selected operation mode data is read. Then, these data are RS in the order of the identification code, the port data, and the operation mode data.
-Control code "CR" as the final code for serial transfer to the 232C interface 20 and indicating the final
Is added. Further, in the case of continuously transmitting information to the audiovisual equipment connected to the interfaces 50 to 70 designated by the identification code, as shown in FIG. 8, a signal including a set of port data and operation mode data. Are created in plural blocks (“2 blocks” in the figure).

By the above processing on the integrated control circuit 10 side, a control signal according to an operation command is sent to the system bus SB. Each interface 50 for inputting this control signal
70 repeatedly processes the following decoding program, and executes the operation of the equipment according to the control signal.

FIG. 9 shows C of each of the interfaces 50 to 70.
It is a flowchart of the decoding program executed by PU50G-70G. Hereinafter, the case where this decryption program is executed by the CPU 60G will be described with reference to the explanatory view of FIG. When a control signal is sent via the system bus SB, the CPU 60G causes the input converter 60
This control signal is input via F (step 200),
The control signal is immediately output to the output converter 60H (step 210). This is because the control signal may not specify itself.

Next, the identification code of the control signal and the set value of the ID switch 60P input in step 200 are read (step 220), and a check is made to see if these data match (step 230). . When it is determined by this collation processing that the control signal does not specify itself, this program ends. On the other hand, if the above two data match, the table stored in the RAM 60J by the above-mentioned registration work is referred to, and a set of port data and operation mode data included in the control signal is used to output from the connector. Create output data to be output.

For example, in FIG. 10, the first 2b of the control signal
Since the identification code that is yte is “ID60”, only the CPU 60G of the interface 60 executes step 240.
The subsequent processing is executed as follows. First, the combination of the port data "A" and the operation mode data "100" created corresponding to the operation command from the control signal is read, and the output data stored in advance in the RAMJ in a 1: 1 correspondence with these data is read. read out. The CPU 60G sequentially outputs the output data thus obtained from the corresponding ports of the connector 60D (step 250), and judges whether all the output data has been output (step 260),
The processing from step 240 to step 260 is repeatedly executed.

In the example shown in FIG. 10, the port data and operation mode data of a total of 4 bytes mean that "the VTR projector VS is turned on, the reproduction is performed for 10 minutes, then the slow reproduction is performed for 5 minutes, and the power is turned off". Output data for causing the VTR projector to execute a series of program reproduction is read out, and this is sequentially output from the 232C driver 60W. That is, the total control signal of 7 bytes including the identification code and the final code is the integrated control circuit 1
By the signal processing of 0 and the interface 60, it is output to the equipment as output data with an information amount of tens or hundreds of bytes, and the equipment can perform complicated operations. Of course, some or all of these complicated operations are performed by the MPU 12 on the integrated control circuit 10 side, and a simple contact ON / OFF signal may be output to each of the interfaces 50 and 70. Is.

Furthermore, the equipment control device 1 of this embodiment is
By using the macro key 34A of the keyboard 34, a plurality of control signals can be sent to the system bus SB by one operation. FIG. 11 is a functional explanatory diagram of the macro key 34A. This macro key table is stored in the RAM 16 by executing similar registration processing after a table of identification codes, port data and operation mode data corresponding to each operation command is created by registration of the operation mode. . With the macro key 34A having such a function,
As shown, by operating any one of the macro keys, a plurality of operation commands corresponding thereto are read out, and a series of control signals based on the plurality of operation commands can be created.

With this macro key function, for example, 8 mm
An operation command required to execute the projection by the projector MV, "close the dark curtain by operating the dark curtain drive circuit DS", "pull down the screen by operating the screen drive circuit SM", and then "turn off the interior lighting LS". Finally, a series of closely related operation commands such as “activate 8 mm projector MV” can be surely completed by one operation.

As described above, the equipment control device 1 of this embodiment employs the system bus interface 40 and interfaces 50 to 70 capable of high-level information processing, and provides information necessary for controlling each equipment. The processing is shared by each interface. Therefore, the main part of the integrated control circuit 10 can be configured by using the small and inexpensive personal computer PC11. Further, a complicated operation can be instructed to the equipment connected to the desired interface simply by transmitting a control signal having a small amount of information at high speed via the system bus SB.

Moreover, since various input / output devices are provided as the integrated operation unit 30, the facility device control apparatus 1 can be freely operated regardless of the operation skill level and the operation location. In particular, the plurality of sensors 38 provided as a type of input / output device are automatically connected to the PC 11 when a certain condition is satisfied.
Since the operation command is output to, it is possible to realize the operation of the equipment without any manual operation.

Further, since the data communication method between the system bus interface 40 and the interfaces 50 to 70 uses a method of expressing information as a change in current value, the RS is used as a main part of the integrated control circuit 10. Despite the adoption of the 232C standard PC 11, it is possible to perform communication with a maximum communication distance of several hundred meters. Further, since the DC power generated by the power supply circuit 40H of the system bus interface 40 is supplied to each of the interfaces 50 to 70 via the system bus SB, power lines and other troublesome connections are omitted when installing the interfaces. It

Further, the equipment control device 1 of this embodiment is
By using the macro key 34A of the keyboard 34, control signals corresponding to a plurality of operation commands can be sent to the system bus SB by one operation of the macro key. In addition,
As for the interfaces 50 to 70 connected to the system bus SB of this embodiment, only three different types of interfaces having different output formats from each other are shown, but the combination is arbitrary and integrated. It is possible to connect to the system bus SB an interface circuit of a type and a number corresponding to the type and the number of equipments to be controlled.

The embodiments of the present invention have been described above.
The present invention is not limited to these examples, and it goes without saying that the present invention can be implemented in various modes without departing from the gist thereof. For example, instead of the general-purpose personal computer PC11 as the integrated control circuit 10, a dedicated circuit may be adopted. Further, the RS-232C standard can be directly applied as the communication method of the system bus SB.

[0051]

As described above, the control device for audiovisual equipment according to the present invention processes only the control signal corresponding to the operation of the integrated operation section on the integrated control circuit side and outputs it to the system bus. When the control signal is output to the system bus, the interface circuit corresponding to the control signal can convert the control signal into an operation signal for operating the audiovisual equipment equipment to control the audiovisual equipment equipment.

Therefore, an interface circuit can be easily added without increasing the information processing capability of the integrated control circuit, and even if such a large-scale system is constructed, a control signal with a small amount of information can be transmitted. Since all that is required is transmission, all equipment can be controlled quickly and accurately.

[Brief description of drawings]

FIG. 1 is an overall configuration block diagram of a control device for audiovisual equipment according to an embodiment of the present invention.

FIG. 2 is an electric circuit block diagram of a system bus interface of the equipment device control device.

FIG. 3 is a plan view, a front view, and left and right side views of the interface 50.

FIG. 4 is an electric circuit block diagram of the interface 50.

5 is a block diagram of an electric circuit of the interface 60. FIG.

FIG. 6 is an electric circuit block diagram of the interface 70.

FIG. 7 is a flowchart of a control signal output program processed by the integrated control circuit.

FIG. 8 is an explanatory diagram of processing of the control signal output program.

FIG. 9 is a flowchart of a decryption program processed by the interface.

FIG. 10 is an explanatory diagram of processing of the decryption program.

FIG. 11 is an explanatory diagram of functions of the macro key.

FIG. 12 is an explanatory diagram of a conventional centralized control type audio-visual equipment device control device.

FIG. 13 is an explanatory diagram of a conventional distributed processing system audiovisual equipment device control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Control device of audiovisual equipment 10 ... Integrated control circuit 11 ... PC 12 ... MPU 14 ... ROM 16 ... RAM 18 ... Input / output interface 30 ... Integrated operation part 32 ... Touch panel 34 ... Keyboard 36 ... Remote control 38 ... Sensor 40 ... System bus interface 50, 60, 70 ... Interface

Claims (5)

(57) [Claims] 1. A control device for controlling an audiovisual equipment device that operates according to an operation signal input from an operation unit, wherein an integrated operation signal input from an integrated operation unit is generated in response to the operation of the audiovisual equipment device. An integrated control circuit for converting the control signal to a predetermined control signal and outputting the control signal to the system bus, an equipment device connection unit connected to the operation unit of the audiovisual equipment, and the control signal connected to the system bus A control signal input section for inputting the control signal and a control signal output section for outputting the control signal input from the control signal input section to the system bus, and the control signal input from the control signal input section An interface circuit that decodes the operation signal and outputs the operation signal to the device connection unit. 2. The integrated control circuit, when outputting the control signal, adds a circuit identification signal assigned to the interface circuit connected to the facility equipment operated by the control signal to the control signal. The interface circuit deciphers the circuit identification signal prior to deciphering the control signal, and deciphers the control signal only when the interpretation result is the circuit identification signal assigned to itself. The control device for the audiovisual equipment according to claim 1. 3. The integrated control circuit includes a voltage signal generator that outputs a control signal to be output to the system bus as a change in voltage value, and a change in voltage value output from the voltage signal generator as a current value. And a voltage / current conversion unit that outputs the change to the system bus and outputs it to the system bus. The control signal input unit of the interface circuit is a control signal expressed as a change in the current value input from the system bus. The control device for audiovisual equipment according to claim 1 or 2, further comprising a current / voltage conversion unit that converts a signal into a change in voltage value. 4. The integrated control circuit has a control signal string storage unit for storing a series of control signals, and when the integrated operation unit performs a predetermined integrated operation, the integrated control circuit responds from the control signal string storage unit. 4. The control device for audiovisual equipment according to claim 1, wherein a series of control signals are read out and sequentially output to the system bus. 5. The integrated control circuit has a voltage source circuit having a capacity exceeding its own power consumption, and supplies the power of the voltage source circuit to the interface circuit via the system bus. 5. The control device for audiovisual equipment according to claim 1.