JPH09282573A - On-vehicle electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent operational burden from being loaded to a user for releasing operation lock and further to effectively utilize a robbery preventing function. SOLUTION: A door lock opening/closing code outputted from the ignition key of an automobile to load on-vehicle electronic equipment is stored. Then, only when the same door lock opening/closing code is inputted, is the operation lock of equipment released (F204). Namely, only when that automobile is driven by the proper owner, is the operation lock released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various in-vehicle electronic devices mounted in an automobile, such as devices generally called car stereos.

[0002]

2. Description of the Related Art As in-vehicle electronic equipment, audio equipment such as CD (compact disk) player, MD (mini disk) player, tape player, and radio tuner, video equipment such as television and video, and navigation system, etc. The equipment is widely used. In such an on-vehicle electronic device, it is preferable that a function for preventing theft is provided.

[0003]

The function of preventing theft includes, for example, a function of preventing the device from operating unless a specific card owned by the owner is set at a predetermined position, and a password input. If not, a method to prevent the device from operating has been considered. In other words, the operation is locked so that only the person himself can use it, and even if it is stolen, it is disabled so that theft can be prevented. However, since the operation lock must be released by inserting a card or entering a personal identification number each time when using,
There is a problem that the operation becomes very complicated.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, the present invention is intended to exert an antitheft function while not burdening the user with an operation load for unlocking the operation lock. With the goal.

For this reason, as an on-vehicle electronic device, receiving means capable of receiving a door lock opening / closing code output as a radio signal from an ignition key of the vehicle, storage means for storing a specific door lock opening / closing code, and receiving means If the door lock open / close code is received by the means,
The received door lock opening / closing code is compared with the door lock opening / closing code stored in the storage means, and when they match, the operation lock of the vehicle-mounted electronic device is released, and a control means for enabling normal operation is provided. . 2. Description of the Related Art In recent years, a system in which a function for outputting a door lock opening / closing code by infrared rays or radio waves is provided to an ignition key and the opening / closing of a vehicle door lock can be remotely controlled has become widespread. Therefore, in the vehicle-mounted electronic device, the door lock opening / closing code output from the ignition key of the vehicle is stored. Then, only when the same door lock opening / closing code is input, the operation lock of the device is released. That is, the operation lock is released only when the legal owner of the vehicle drives. In this case, a complicated unlocking operation for the on-vehicle electronic device is unnecessary.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing an on-vehicle CD player as an example of the on-vehicle device of the present invention.

A CD (compact disc) 1 is loaded in a CD driver 2. The CD driver 2 is a part for reading the information recorded on the CD 1, and has a spindle motor, an optical head, a servo mechanism, and the like. Then, while the CD1 is rotationally driven by the spindle motor, the optical head irradiates the recording surface with laser light, and a signal based on the reflected light is output as reproduction information.

The reproduction information is supplied to the reproduction signal processing section 3. The reproduction signal processing unit 3 performs EFM decoding, CIRC decoding, deinterleaving, and other processing on the signal (EFM signal) read from the CD 1 as reproduction information, and demodulates a so-called digital audio signal.
Further, not only audio information but also track number, reproduction time information (address) and the like are read from the CD 1 as control information called subcode, and this subcode is also extracted. The subcode is supplied to the controller 6 and used for various controls such as display and access.

For a digital audio signal, a DSP (digital signal processor) or the like in the reproduction signal processing unit 3 produces sound such as surround mode processing, equalizing processing, reverb processing, loudness processing, volume adjustment processing, volume balance adjustment and the like. Effect processing can also be performed. The digital audio signal that has undergone various processes is converted into an analog audio signal by the D / A converter. It should be noted that all or part of the above acoustic effect processing may be executed after the analog audio signal is obtained.

The reproduction signal processing unit 3 performs these processes, and the output analog audio signal is amplified by the power amplifier unit 4 for driving the speaker.
It is supplied to the speaker unit 5 and output as voice.

The controller 6 is composed of a microcomputer, and controls the information reading operation from the CD 1 in the CD driver 2 and the access operation. Further, the reproduction signal processing unit 3 is controlled to execute the above-described acoustic effect processing. The operation unit 7 is provided with various operation keys as a user interface. For example, there are provided operation keys such as a play key, a track access key, a stop key, and a pause key for instructing a basic operation as a CD player, and secondary operation keys such as a volume control key and an equalizing operation key. ing.

Various operation information from the operation unit 7 is supplied to the controller 6. The controller 6 performs control so as to execute a necessary operation for a necessary portion based on the input operation information and the internal program. For example, in response to the operation of the reproduction key, the CD driver 2 is instructed to start the reproduction operation, operate various servo systems, start the read operation by the optical head, and the like. When the sound processing operation is performed, the DSP in the reproduction signal processing unit 3 is
An instruction is given to execute the process of giving the acoustic effect designated by the operation.

The display unit 8 has a display area formed of, for example, a liquid crystal display. The display operation of the display unit 8 is controlled by the controller 6. The controller 6 causes the display unit 8 to mainly display the operation status of the CD player. As the display contents regarding the basic operation, the reproduction operation state, the current track number, the reproduction time information, etc. are displayed. These control the display in accordance with the operating conditions controlled by the controller 6 and the subcode read from the CD 1. It also displays messages to the user.

The receiving unit 9 is a receiving unit for a wireless remote control signal such as an infrared signal or a radio wave signal. The type of signal system depends on the wireless output system of the ignition key 30 of the automobile in which the CD player is mounted.
Actually, when manufacturing the CD player, it is not known what kind of vehicle the vehicle will be equipped with, and therefore it is not known whether the ignition key 30 has a wireless output system of an infrared signal system or a radio signal system. Therefore, it is advisable to form both the infrared receiving unit and the radio wave receiving unit so as to be compatible with both types.

In the receiving section 9, the attached remote commander 2
An operation command signal from 0 is also received. A user operates the remote commander 20 to output a command signal by infrared rays or radio waves, which is received by the receiving unit 9 and input to the controller 6. The controller 6 recognizes this as an operation signal and controls each of the required parts in the same manner as when the operation part 7 is operated.

The illustrated ignition key 30 is an ignition key of an automobile in which the CD player of this example is mounted. In other words, the key is owned by the car owner. This vehicle is assumed to be capable of remote control of a door lock using an ignition key 30, which is a so-called keyless entry. Ignition key 3
An operation button 31 is provided at 0, and when the operation button 31 is pressed, a specific door lock opening / closing code is output from the transmission unit 32 by infrared rays or radio waves. Therefore, inside the ignition key 30, as shown in FIG. 2, the ROM 34 in which the door lock opening / closing code is stored and the door lock opening / closing code are read out from the ROM 34 by detecting that the operation button 31 is pressed, and transmitted from the transmitter 32. A CPU 33 is provided which controls the transmission by infrared rays or radio waves. Although not shown, the vehicle is provided with a door lock opening / closing code receiving portion, and when the correct door lock opening / closing code is received, the door lock is turned on / off according to the received code.

The nonvolatile memory 10 includes a controller 6
Thus, the data is stored so that the memory is not erased even when the power is turned off. Particularly in the case of this example, the non-volatile memory 10 is used for registering a door lock opening / closing code (key code) from the ignition key 30.

The CD player of this embodiment is designed to release the operation lock by the door lock opening / closing code output from the ignition key 30 as described above. And first of all, for this reason, the ignition key 30
The process of registering the specific door lock opening / closing code output from is performed as shown in FIG. The owner of the automobile must first perform the key code registration operation when the CD player is mounted on the automobile. The key code mentioned here is a specific door lock opening / closing code set for the vehicle.

When the controller 6 enters the mode for this registration operation, first, in step F101 of FIG.
The key code input request is displayed. In response to this, the user operates the operation button 31 of the ignition key 30.
Press to make the receiver 9 receive the door lock opening / closing code. The door lock opening / closing code is input as a key code by such a user's operation (F102), and when the controller 6 properly takes in the code (F103), the key code for unlocking the operation lock of the door lock opening / closing code Is stored in the non-volatile memory 10. Preparation is completed by registering the key code in the non-volatile memory 10.

The controller 6 automatically enters the operation lock state when the power of the CD player is turned off, for example. For example, the operation may be locked when the engine is turned off and the main power supply from the car battery is turned on.
Or the user gets out of the car and the ignition key 30
The door lock opening / closing code is output from the vehicle, and when the door of the vehicle is locked, the door locking opening / closing code is also input to the receiving unit 9. Therefore, the door locking opening / closing code may be detected to enter the operation lock state. It is also possible to provide an operation key for operation lock and enter the operation lock state by a user operation.

There are various possible methods for entering the operation lock state, but the operation button 31 of the ignition key 30 is used.
If the controller 6 detects the door lock open / close code and enters the operation lock when the user locks the door by pressing (that is, when the user leaves the car), there is no need for the user to operate. Most suitable.

When the operation lock state is entered, the controller 6 performs the processing relating to the operation lock of FIG.
First, as step F201, the key code input is constantly monitored. If any door lock opening / closing code is input, the door lock opening / closing code is fetched as a key code in step F202 and compared with the key code registered in the nonvolatile memory 10.

If no match is obtained as a result of this comparison, that is, if a code is input from an ignition key other than the ignition key 30 of the vehicle or other remote control device, the process proceeds from step F203 to F205. An error message is displayed in 8 and the operation lock is not released. On the other hand, if it is determined in step F203 that they match, the operation lock is released, and thereafter, the controller 6 enters a state in which normal operation processing is performed according to the operation of the operation unit 7 or the remote commander 20.

Therefore, when the user presses the operation button 31 of the ignition key 30 to release the door lock in order to get into the automobile, the CD player is unlocked at the same time, and when the user gets on the vehicle, normal use becomes possible. . In addition, even if for some reason the user cannot receive the door lock opening / closing code output from the ignition key 30 outside the vehicle by the receiving unit 9, the user only has to press the operation button 31 again when getting on the vehicle. No complicated operation is required to unlock the operation lock of the CD player.

Since the operation lock cannot be released unless the ignition key 30 in which the door lock opening / closing code is registered is used, only the original user, that is, the owner of the vehicle cannot use the lock, which is effective as a theft prevention function.

Although the embodiment has been described as the on-vehicle CD player, it goes without saying that the present invention can be similarly applied to other various on-vehicle electronic devices such as a radio tuner, a tape player, and a navigation system.

[0027]

As described above, the on-vehicle electronic device of the present invention stores the door lock opening / closing code output from the ignition key of the automobile, and only when the same door lock opening / closing code is input, Since the operation lock is released, the operation lock can be released only when the legal owner of the vehicle is driving, which is effective as an anti-theft function, and complicated operations such as entering a password for unlocking the operation lock are performed. It is possible to realize very good usability without any special operation.

[Brief description of drawings]

FIG. 1 is a block diagram of a vehicle-mounted CD player according to an embodiment of the present invention.

FIG. 2 is a block diagram of an ignition key used in the embodiment.

FIG. 3 is a flowchart of a key code registration process according to the embodiment.

FIG. 4 is a flowchart of processing in the operation lock state according to the embodiment.

[Explanation of symbols]

2 CD driver, 3 reproduction signal processing unit, 4 power amplifier unit, 5 speaker unit, 6 controller, 7 operation unit, 8 display unit, 9 receiving unit, 10 non-volatile memory,
20 remote commander, 30 ignition key,
31 Operation buttons

Claims (1)

[Claims] 1. A receiving unit capable of receiving a door lock opening / closing code output as a radio signal from an ignition key of a vehicle, a storage unit storing a specific door lock opening / closing code, and a door lock opening / closing by the receiving unit. When the code is received, the received door lock opening / closing code is compared with the door lock opening / closing code stored in the storage means,
An in-vehicle electronic device, comprising: a control unit that unlocks the operation lock of the in-vehicle electronic device when they match and enables a normal operation.