JP2000333271A - Unit device control system, unit device, operation menu display method, and recording medium - Google Patents

Abstract

(57) [Summary] To provide a unit device control system capable of reducing a memory capacity of a head unit device for controlling a unit device and displaying an appropriate operation menu. SOLUTION: Function specification data is obtained from the side of option units 30 and 40, and an operation menu of functions of the option units 30 and 40 is displayed on the monitor 5 of the head unit with monitor 20 based on the function specification data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system for controlling various unit devices such as an audio unit and a navigation unit mounted on an automobile or the like.

[0002]

2. Description of the Related Art Recent automobiles include a clock unit and an AM.
/ FM radio unit, audio units such as cassette tape recorder unit, compact disc (CD) player unit, mini disc (MD) player unit, car navigation unit,
Various unit devices such as a television (TV) unit and the like are mounted, and the multifunctionality of these unit devices and the accompanying complicated operation are progressing.

In order to simplify the operation of these various unit devices, each unit device is connected to a unit device serving as a head unit device, and an operation menu of each unit device is displayed on a display screen of the head unit device. A method of centrally controlling each unit device by operating the head unit device has been proposed.

[0004]

However, in the above method, it is necessary to mount data and programs for displaying operation menus corresponding to all of the unit devices connected to the head unit device in the head unit device. For this reason, there is a problem that the capacity of the memory of the head unit device for storing the data and the program is increased and the cost is increased.

[0005] Even if a unit device is not connected to the head unit device at first, there is a possibility that the unit device may be connected to the head unit device with data or a program for displaying an operation menu on the head unit device. It is necessary to keep it, so that extra memory is required, and if the user does not connect such a unit device, the memory capacity will be wasted eventually,
This puts an unnecessary financial burden on the user.

Further, when connecting a new unit device or an upgraded unit device, data or a program for displaying an operation menu of these unit devices is added to the head unit device, and in some cases, the head unit device is added. Will have to be replaced. Such a lack of compatibility between the head unit device and the unit device imposes an unnecessary economic burden on the user.

Further, when the operation menu displayed on the head unit does not correspond to the function of the unit to be controlled (if it does not match), an unnecessary operation menu is displayed. This may confuse the user and cause erroneous operation.

An object of the present invention is to provide a unit device control system, a unit device, an operation menu display method, and a recording medium that can solve such a problem.

[0009]

A unit device control system according to the present invention is a unit device control system for controlling a unit device connected to the head unit device by operating a head unit device having a display screen. Obtaining function specification information indicating a function to be controlled from the unit device side, and displaying an operation menu of the function of the unit device on the display screen of the head unit device based on the function specification information. .

A unit device control system according to the present invention is a unit device control system for controlling a unit device connected to the head unit device by operating a head unit device having a display screen. Has a function specification information output unit that outputs function specification information indicating a function to be controlled, and the head unit device is configured to output the function specification information based on the function specification information output from the function specification information output unit of the unit device. It has a display means for displaying an operation menu of the function of the unit device on the display screen.

In another aspect of the unit device control system of the present invention, information indicating the operation state of the unit device is displayed on the display screen of the head unit device based on the operation state information obtained from the unit device side. It is characterized by the following.

In another aspect of the unit device control system of the present invention, the hardware control of the head unit device performed at the time of controlling the unit device is used as an interface to hardware control means of the head unit device. It is performed through a functioning interface means.

A unit device according to the present invention is a unit device that functions as a head unit device when controlling another unit device connected via communication means, and includes a display screen and control from the other unit device. A function specification information capturing unit that captures function specification information indicating a target function; and an operation menu for the functions of the other unit devices based on the function specification information captured by the function specification information capturing unit. And display means for displaying the information.

Further, the unit device of the present invention includes a function specification information output means for outputting function specification information indicating a function to be controlled to another unit device connected via communication means, Control means for controlling the function of the device itself based on the control information sent from the device.

An operation menu display method according to the present invention is an operation menu display method for displaying an operation menu of the functions of the unit device on a display screen of a head unit device for controlling a unit device connected via communication means. And obtaining function specification information indicating a function to be controlled from the unit device side, and displaying an operation menu of the function of the unit device on the display screen of the head unit device based on the function specification information. And

A computer readable recording medium according to the present invention is a unit device control system for controlling a unit device connected to the head unit device by operating a head unit device having a display screen. A program for causing a computer to function as means for obtaining function specification information indicating a function to be controlled and displaying an operation menu of the function of the unit device on the display screen of the head unit device based on the function specification information is recorded. Features.

[0017]

According to the present invention, the head unit device obtains function specification information from the unit device side and displays an operation menu based on the function specification information. Therefore, it is not necessary to mount the function specification information of all the unit devices that may be connected to the head unit device. Further, on the display screen of the head unit device, only the operation menu of the function to be controlled by the connected unit device is displayed, and the operation menu of the function that the unit device does not have or the function that is not to be controlled is not displayed. It will be.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an arrangement state of each unit constituting an on-vehicle unit control system embodying the present invention in an automobile, and FIG. 2 is a block diagram showing an example of a hardware configuration of each unit. is there.

As shown in FIGS. 1 and 2, in the on-vehicle unit control system according to the present embodiment, the head unit 20 with the monitor is provided with two optional units 30 and 4.
0 is connected via the communication bus 8. Here, the unit 30 is a CD player unit and the unit 40
Is an MD player unit.

As shown in FIG. 2, the head unit with monitor 20 includes a CPU 1, a ROM 2, a RAM 3, a communication circuit 4 for communicating with each unit, a monitor 5, a function controller 6, and a plurality of operation buttons 7a to 7d. It has an operation panel 7 provided.

The monitor 5 includes units 20, 30,
Various information such as an operation menu of 40 functions and an operation state are displayed, and the user operates the operation panel 7 based on the operation menu displayed on the monitor 5.
It is configured such that the functions of the unit 20 itself or the units 30 and 40 connected to the unit 20 can be controlled. The head unit with monitor 20 also has voice recognition and voice synthesis functions.

The optional units 30 and 40 include a CPU
9, a ROM 10, a RAM 11, a communication circuit 12 for communicating with each unit, and a function controller 13.

FIG. 3 is a block diagram for explaining the functional configuration of each of the units 20, 30, and 40.

The head unit with monitor 20 includes an inter-unit communication bus control means 21 for controlling communication with each of the optional units 30 and 40, and each of the units 30 and 4.
Unit connection status checking means 2 for checking the connection status of 0
2. Registered unit selection means 2 for designating a unit to be controlled from the units 30 and 40 whose connection has been confirmed by the unit connection state confirmation means 22
3, hardware control means (hard control means) 24, which is constituted by the function controller 6 of FIG. 2 and controls the hardware of the unit 20, menu display creation means (display means) 25, hardware access means (interface means) 26, Data capturing means (functional specification information capturing means) 2
7. It has a command generation means 28.

The data fetching unit 27 transmits various data such as function specification data, which is function specification information, and status data, which is operation state information, transmitted from the unit selected by the registration unit selection unit 23 to the communication bus 8 and the unit. The data is fetched through the inter-communication bus control means 21 to perform data analysis, data supply and the like. The above function specification data
This is data indicating the types and specifications of the functions to be controlled by the units 30 and 40. The status data is data indicating an operation state of each unit of each of the units 30 and 40 and the like.

The menu display creation means 25 is a unit 3 based on the function specification data obtained from the data acquisition means 27.
Screen data for displaying an operation menu of each of the functions 0 and 40 on the monitor 5 is generated. As shown in FIG. 7, the operation menu includes a unit 3 controlled by operating the operation buttons 7a to 7d provided on the operation panel 7.
It shows the functions and contents of 0, 40. The menu display creating means 25 displays screen data for displaying on the monitor 5 information indicating various operation states such as a performance state as shown in FIG. 7 based on the status data obtained from the data capturing means 27. Generate.

Then, based on the screen data generated by the menu display creating means 25, the hardware access means 26
However, the operation menu and the operation state are displayed on the monitor 5 by the hardware control means 24. The hard access means 26 is provided by the units 20 and
At the time of control of 0 (when the operation menu creation task and the function control task of FIG. 5 are activated), when accessing the hardware such as the monitor 5 of the unit 20 and the operation buttons 7a to 7d, it mediates with the hardware control means 24. The subroutine executes a process, and is composed of, for example, a subroutine in which arguments for specifying a specific control are standardized. That is, the hardware control of the unit 20 performed when the operation menu creation task and the function control task shown in FIG. 5 are started is not directly performed by using the hard control means 24 for controlling each hardware unit of the unit 20. 26.

Therefore, the hard access means 26
It functions as a standard interface to the hardware control means 24, and even if the hardware specifications of the unit 20 are changed in the future, the hardware access means 26 allows each unit 3
It can be used as it is without replacing 0, 40 or the like.

The command generating means 28 controls the unit 3 to perform the control instructed by operating the operation buttons 7 a to 7 d of the operation panel 7 detected via the hardware access means 26.
It generates control commands and various commands to be performed by the units 0 and 40 and sends them to the units 30 and 40 via the inter-unit bus control means 21 and the communication bus 8.

The inter-unit communication bus control means 21, unit connection state confirmation means 22, registered unit selection means 23, menu display creation means 25, hard access means 26, data acquisition means 27, and command generation means 28 A microcomputer system including a CPU 1, a ROM 2, and a RAM 3;
2 stores a program for realizing the functions of these units.

The optional units 30 and 40 include inter-unit communication bus control means 31 and 41 for controlling communication with the monitor-attached head unit 20, and connection confirmation response means 32 for responding to a connection confirmation from the monitor-attached head unit 20. , 42, head unit 20 with monitor
Command analyzing means (control means) 33, 4 for analyzing various commands such as control commands sent from the controller and causing the hard control means 34, 44 to perform corresponding control.
3, hard control means 34 and 44 for controlling each part of the units 30 and 40, each function, and the head unit 2 with a monitor, which are constituted by the function controller 13 of FIG.
The function specification data transmission means (function specification information output means) 35, 45 for transmitting the function specification data stored in the function specification data storage means 36, 46 for 0, the respective units of the own unit, and the operation state of each function. Operation state detecting means 37 and 47 for detecting are provided.

The inter-unit communication bus control means 31, 41, connection confirmation response means 32, 42, command analysis means 33, 43, and function specification data transmission means 3
5, 45, the function specification data storage means 36, 46, and the operation state detection means 37, 47
M11 and a program for realizing the function of each means are stored in the ROM 10.

FIG. 7 is a view showing a display example of an operation menu on the monitor 5 of the head unit with monitor 20. FIG. 7A shows an operation when the optional unit 40 which is an MD player unit is selected. FIG. 7B shows a display example of a menu, and FIG. 7B shows a display example of an operation menu when the option unit 50 (see FIG. 9) which is a CD changer unit is selected.

As shown in the figure, the display screen of the monitor 5 of the head unit with monitor 20 includes a unit 40,
A performance state display (operation state display) indicating a performance state of 50 and an operation menu display of each function of each unit 40, 50 are provided.

As shown in FIG. 7A, the MD player unit of the unit 40 has a DISC / TRAC
Since there is a K NAME display function, the selection menu and NAME information are displayed. The program function is R
Since it is PT / SCN / RDM, the selection menu is displayed. Further, since there is no DISC switching function, the selection menu is not displayed.

On the other hand, since the CD changer unit of the unit 50 does not have the DISC / TRACKNAME display function, the selection menu and the NAME information are not displayed as shown in FIG. 7B. Also, the program function is RPT / SCN / RDM / DISC RPT / DISC
Since it is SCN / DISC RDM, the selection menu is displayed. Further, since there is a DISC switching function, the selection menu is displayed.

FIG. 8 is a diagram for explaining the information content of the function specification data transmitted from each unit to the head unit with monitor 20 to display the operation menu.

This example is function specification data for displaying an operation menu of the unit 40 which is the MD player unit shown in FIG. 7A. The unit 40 includes a repeat function (RPT), a scan function (SCAN), It has a random function (RDM), a track name and disk name display function (TRACK NAME, DISC NAME), and a disk repeat function (DISC RPT), a disk scan function (DISC SCAN), and a disk random function (DISC RDM). It does not.

The head unit with monitor 20 obtains the function specification data from the unit 40, thereby displaying the operation menu of the function of the unit 40 and not displaying the operation menu of the function that the unit 40 does not have. This is the same for other units. Therefore, since only the operation menu of the controllable function of the unit to be controlled is displayed on the monitor 5 of the unit 20, the operation menu display is easy to see, and the operability can be improved.

Next, referring to FIG. 4, an outline of a procedure for displaying an operation menu will be described by taking as an example a case where the units 30 and 40 are controlled by the head unit 20 with a monitor.

First, the head unit 20 with monitor is
A request command for transmitting function specification data and status data is transmitted to the unit selected as the audio source (step S1). The units 30 and 40 that have received the request command transmit the function specification data and the status data to the head unit with monitor 20 (step S2). The monitor-equipped head unit 20 analyzes the received function specification data and status data, creates an operation menu for the function of the selected unit, displays the created operation menu on the monitor 5,
Various information indicating the operating state of the unit is also displayed on the monitor 5.

Next, referring to FIGS. 5 and 6, the details of the procedure of the control processing executed in each of the units 20, 30, and 40 will be described.

FIG. 5 is a flowchart showing the procedure of the control process executed on the monitor-attached head unit 20 side.

First, in step S1, the power is turned on (ACC
If (ON) is detected, the connection state of the units is checked by the unit connection state confirmation means 22 in step S2, and a unit selection screen is created.

Next, in step S3, an operation menu creation task and a function control task, which will be described later, are started to control the unit selected before the ACC (power supply) is turned off. The task referred to here is a group of continuous processing, and each task operates independently and in parallel.

Next, in step S4, it is checked whether or not the user has requested to switch the unit to be controlled (such as key input by operating the operation panel 7). If there is a switching request, the flow advances to step S6. If there is no switching request, the process returns to step S4 (step S4).
5).

In step S6, the data fetching unit 26 issues a request for transmission of function specification data and status data to the unit instructed to switch, and receives function specification data and status data from the corresponding unit in step S7. Then, in step S8, the control target is switched from the unit selected so far to the newly selected unit, and the operation menu is created in step S9 based on the function specification data and status data received in step S7 from the unit. Start the task and function control task.

The operation menu creation task and the function control task of step S9 are performed by the menu display creation means 2
5. The operation menu creation task, which is executed by the data acquisition means 27 and the command generation means 28, creates an operation menu of the function of the selected unit on the monitor 5 based on the function specification data received from the selected unit. Display. The function control task analyzes the input of the operation buttons 7a to 7d of the operation panel 7, generates a control command corresponding to the button operation, and transmits the control command to the corresponding unit. The function control task analyzes received data such as status data, and displays information indicating the operation state of the unit on the monitor 5 based on the received status data. The communication control task in step S10 is executed by the inter-unit communication bus control means 21 and controls transmission and reception of various data and commands between the units 30 and 40.

FIG. 6 is a flowchart showing the procedure of the control processing executed on the units 30 and 40 side.

First, in step S11, power is turned on (AC
When (CON) is detected, the connection confirmation response means 32 and 42 respond to the connection state confirmation from the head unit 20 with monitor in step S12.

Next, in step S13, after receiving the command transmitted from the unit 20, the process proceeds to step S14.
Then, a process corresponding to the received command is executed. That is, when the function specification data and the status data request command are received, the function specification data transmission means 35 and 45 transmit the function specification data read from the function specification data storage means 36 and 46 to the unit 20, and the process proceeds to step S15.
The unit state analysis task is started, and the operation state detection means 37 and 47 detect the operation state of each part and each function of the units 30 and 40, and the detected information is used as status data as the inter-unit communication bus control means 3
1 and 41 to the unit 20. When the control command is received, the command analysis means 33, 43 causes the hard control means 34, 44 to perform control such as reproduction start, stop, song skip, repeat, and volume change designated by the control command. The communication control task in step S16 is executed by the inter-unit communication bus control means 31 and 41, and controls transmission and reception of various data and commands to and from the unit 20.

As described above, according to the present embodiment, each unit 30, 40 required for displaying the operation menu is provided.
Is mounted on each unit 30 and 40 side, and the head unit 20 with monitor is configured to obtain the function specification data from each of these units 30 and 40 and display the operation menu. It is possible to reduce the ROM capacity of the head unit 20 and the manufacturing cost of the apparatus, and it is not necessary for the unit in the system to have the function specification data of the unit that the user does not want to connect (the connection is conventionally assumed. Head unit with monitor 2
0), the memory capacity and cost of the entire system can be reduced.

Even when a new unit or an upgraded unit is connected, new functional specification data is added to the ROM 2 of the head unit 20 with a monitor, or the head unit 20 with a monitor is replaced. Need not be performed, so that unnecessary economic burden is not imposed on the user.

The units 30 and 40 to be controlled are
Since the operation menu is created based on the function specification data transmitted from the unit 3, the unit 3 to be controlled is
The operation menu of the function that 0, 40 does not have is not displayed,
Since the operation menu of only the functions of the unit is displayed, the operation menu display is easy to see, and the operability can be improved.

Further, the head unit 20 with monitor is
Since the hardware access means 26 serving as a standard interface for hardware control (a subroutine for common arguments, etc.) is provided, even if the specifications and the like of the head unit with monitor 20 are changed due to a version upgrade or the like, each of the connected head units 20 is not affected There is no need to change the units 30, 40 to new ones. Therefore, the old and new units 20, 30, 4
The system can be configured by mixing 0s, and compatibility between the units can be maintained.

The programs for realizing the above-described functions of the vehicle-mounted unit control system of the present embodiment are stored in the ROMs 2 and 10. In addition, the programs are supplied to the vehicle-mounted unit control system of the present embodiment from outside. And
The above functions can be realized by operating the supplied program.

In this case, means for supplying the program, for example, a recording medium storing the program,
The present invention is constituted. In addition, as a recording medium for storing the above program, in addition to the ROM, for example, a floppy disk, a hard disk, an optical disk, a magneto-optical disk,
CD-ROM, magnetic tape, nonvolatile memory card,
A RAM or the like can be used.

The functions of the above-described embodiments are realized when the computer executes the supplied program, and the OS (operating system) or other application software running on the computer. Such a program is also included in the embodiments of the present invention when the functions of the above-described embodiments are implemented in cooperation with the above.

It should be noted that each of the above-described embodiments is merely an example of an embodiment for carrying out the present invention, and the technical scope of the present invention is interpreted in a limited manner. It must not be. That is, the present invention can be embodied in various forms without departing from the spirit or main features thereof.

For example, the transmission of the function specification information from the unit device to the head unit device is not performed as the function specification data as in the above-described embodiment, but rather as the data of the operation menu display screen itself including the function specification information. May be transmitted to the head unit device to display the operation menu based on the display screen data. In such a case, the program of the menu display creating means 25 can be simplified. Also, the display program data may be transmitted together, and in such a case, the menu display creating means 25 itself becomes unnecessary.

The function specification information includes information on a function that the unit device does not have or a function that is not to be controlled, as long as the function to be controlled can be specified on the head unit device side. It may be.

In the above-described embodiment, an example in which the unit 30 as a CD player unit and the unit 40 as an MD player unit are connected to the head unit 20 with a monitor, but the unit connected to the head unit 20 with a monitor is described. Are not limited to these, and various on-vehicle units can be connected. For example, as shown in FIG.
Unit 50 which is a CD changer unit, unit 60 such as a car navigation unit, an auto air conditioner unit, a cassette stereo with an AM / FM radio, and unit 7 which is a volume amplifier unit
0, and connect these units 30, 40, 50, 6
The operation menu of the functions 0 and 70 may be displayed on the monitor 5 of the head unit 20 with a monitor, and the operation of the operation panel 7 may be performed to control each function of each unit.

In the above embodiment, each unit 3
The example in which the function specification data 0 and 40 transmit the function specification data stored in their own function specification data storage means 36 and 46 to the head unit 20 with a monitor has been described. The specification data may be converted into a predetermined data format suitable for data communication and transmitted.

Further, the head unit device does not need to be a dedicated machine as in the head unit with monitor 20 of the above-described embodiment, and various functions of a vehicle-mounted unit such as a car navigation unit having a display screen can also be used. You may do it. Furthermore, if the operation menu is displayed on the touch panel display screen, the operation buttons 7a to 7d become unnecessary, and the operability is further improved.

Further, the unit device control system of the present invention is not limited to the on-vehicle unit control system of the above-described embodiment, but is also designed so that various unit devices are centrally controlled by the head unit device in various facilities such as factories and hospitals. Can be widely applied to control systems.

[0067]

As described above, according to the present invention, the head unit device obtains the function specification information from the unit device side and displays the operation menu of the function of the unit device based on the function specification information. With such a configuration, the memory capacity of the head unit device is reduced as compared with a method in which data and programs for displaying operation menus of all the unit devices that may be connected are previously mounted on the head unit device. In addition, the manufacturing cost of the apparatus can be reduced.

Also, when connecting a new unit device or an upgraded unit device, data or a program for displaying an operation menu of the unit device is newly stored in the memory of the head unit device. It is not necessary to replace the head unit device, and it is not necessary to put unnecessary economic burden on the user.

Further, since the operation menu of the function of the unit device is displayed based on the function specification information obtained from the unit device, the operation screen of only the function to be controlled by the unit device is displayed on the display screen of the head unit device. Is displayed, and the operation menu of the function that the unit device does not have or the function that is not to be controlled is not displayed, so that the operation menu display is easy to see and the operability can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing an arrangement state of units constituting a vehicle-mounted unit control system in an automobile.

FIG. 2 is a block diagram illustrating an example of a hardware configuration of each unit.

FIG. 3 is a block diagram for explaining a functional configuration of each unit.

FIG. 4 is a flowchart showing an outline of a procedure for displaying an operation menu.

FIG. 5 is a flowchart showing a procedure of a control process executed on the monitor-equipped head unit.

FIG. 6 is a flowchart illustrating a procedure of a control process executed on the option unit side.

FIG. 7 is a diagram showing a display example of an operation menu on a monitor of a head unit with a monitor.

FIG. 8 is a diagram for explaining information contents of function specification data transmitted from each unit to a head unit with a monitor to display an operation menu.

FIG. 9 is a block diagram showing an example in which various on-vehicle units are connected to a head unit with a monitor.

[Explanation of symbols]

1,9 CPU 2,10 ROM 3,11 RAM 4,12 Communication circuit 5 Monitor 6,13 Function controller 7 Operation panel 7a-7d Operation button 8 Communication bus 20 Head unit with monitor 21,31,41 Communication bus control between units Means 22 Unit connection state checking means 23 Registered unit selection means 24, 34, 44 Hardware control means 25 Menu display creation means 26 Hard access means 27 Data acquisition means 28 Command generation means 30, 40, 50, 60, 70 Option unit 32 , 42 connection confirmation response means 33, 43 command analysis means 34, 44 hardware control means 35, 45 function specification data transmission means 36, 46 function specification data storage means 37, 47 operation state detection means

Claims (8)

[Claims] 1. A unit device control system for controlling a unit device connected to the head unit device by operating a head unit device having a display screen, wherein a function to be controlled from the unit device side is shown. A unit device control system comprising: obtaining function specification information; and displaying an operation menu of functions of the unit device on a display screen of the head unit device based on the function specification information. 2. A unit device control system for controlling a unit device connected to the head unit device by operating a head unit device having a display screen, wherein the unit device indicates a function to be controlled. It has function specification information output means for outputting function specification information, and the head unit device is based on the function specification information output from the function specification information output means of the unit device,
A unit device control system, comprising: display means for displaying an operation menu of a function of the unit device on the display screen. 3. The head unit apparatus according to claim 1, wherein information indicating the operation state of the unit apparatus is displayed on a display screen of the head unit apparatus based on the operation state information obtained from the unit apparatus side. Unit device control system. 4. The method according to claim 1, wherein the control of the hardware of the head unit performed at the time of controlling the unit is performed via an interface functioning as an interface to the hardware control of the head unit. Item 4. The unit device control system according to any one of Items 1 to 3. 5. A unit device functioning as a head unit device when controlling another unit device connected via communication means, comprising: a display screen; and a function to be controlled by the other unit device. Function specification information capturing means for capturing the function specification information shown, and display means for displaying an operation menu of the function of the other unit device on the display screen based on the function specification information captured by the function specification information capturing means. And a unit device comprising: 6. A function specification information output unit for outputting function specification information indicating a function to be controlled to another unit device connected via a communication unit, and a control transmitted from the another unit device. A unit device comprising: control means for controlling a corresponding self-function based on information. 7. An operation menu display method for displaying an operation menu of a function of the unit device on a display screen of a head unit device controlling a unit device connected via a communication means, the operation device comprising: A function specification information indicating a function to be controlled from the control unit, and an operation menu of the function of the unit device is displayed on a display screen of the head unit device based on the function specification information. 8. A function specification indicating a function to be controlled from the unit device side in a unit device control system for controlling a unit device connected to the head unit device by operating a head unit device having a display screen. A computer-readable recording medium on which a program for causing a computer to function as means for obtaining information and displaying an operation menu of the functions of the unit device on the display screen of the head unit device based on the function specification information is recorded. .