JPH06276127A - Recording medium for information providing system for automobile - Google Patents

Abstract

PURPOSE:To receive update information transmitted from an information originating station and to automatically update storage information in a recording medium by providing the recording medium with a reception circuit, a buffer memory, a main memory and an access control circuit. CONSTITUTION:While a card reader is reading information from the main memory 15, the access control circuit 16 controls the buffer memory 14 to temporarily store reception information by means of a reception circuit 11 in the buffer memory 14. Then, after finishing reading, the access control circuit 16 transfer-controls storage information from the buffer memory 14 to the main memory 15. Furthermore, in the state of inserting the recording medium (IC card) to the card reader in an automobile, update information is received by way of an internal antenna 13. On the other hand, in a state where the IC card is taken out from the card reader, update information is received by way of an external antenna connected to an antenna terminal 12. Consequently, newest information such as traffic jam information, bargain sale information of a shopping center, etc., can extremely easily be stored/updated to the IC card.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium used in an automobile information providing system for providing information for automobile drivers such as map information and facility information such as restaurants and shopping centers.

[0002]

2. Description of the Related Art Conventionally, for example, an IC card type information providing system for automobiles which provides information such as map information and facility information to a driver is constructed as shown in FIG.

In FIG. 4, when an IC card 3 storing map information is inserted into one of the two card slots 2a and 2b of a card reader 1 which is a reading means, a display computer (hereinafter referred to as a display ECU) 4 is displayed. The card reader 1 is controlled by the card reader 1 and the stored information of the IC card 3 is read by the card reader 1. The read stored information is displayed by the display ECU 4 on the screen of the display means 5 composed of an LCD or the like, and traveled to the driver. Map information of the inside area and other desired areas is provided.

Further, the GPS is transmitted via the GPS antenna 6.
A transmission signal from the satellite is received by a position detection computer (hereinafter referred to as position detection ECU) 7, and this position detection E
The current position (latitude, longitude) of the own vehicle is detected by the CU 7, and the detected current position of the own vehicle is displayed in an overlapping manner on the map displayed on the display means 5.

Further, the card slot 2 of the card reader 1
On the other side of a and 2b, another IC card 3, for example, an IC card 3 that stores facility information indicating the positions of restaurants, shopping centers, parking lots, etc. in the area concerned
When the card is inserted, the stored information of the IC card 3 is read by the card reader 1 in the same manner as described above, and the read information on the position of each facility is displayed on the map displayed on the display means 5. The information is displayed overlaid, and facility information is provided to the driver.

A ROM is usually used as the IC card 3, but a rewritable memory such as a RAM or an EEPROM is provided in recent years, and the latest information is stored in the IC card 3 by a rewriting device installed at a predetermined place. It is considered to be rewritten as.

At this time, for example, information on the construction site of the road,
Information such as traffic jam information and special sales information at shopping centers will be rewritten.

[0008]

However, in the case of rewriting the stored information of the IC card 3 as described above, it is necessary to go to a predetermined facility such as a dealer with a rewriting device, and the rewriting work is very troublesome. In particular, it is difficult to accurately rewrite information because the time interval to be rewritten is too short especially for frequently changing information such as traffic congestion information.

[0009] By the way, in order to eliminate such complication of rewriting, it is conceivable to provide update information using FM multiplex broadcasting or a roadside beacon. In either case, dedicated broadcasting equipment and dedicated receiver are provided. , An interface circuit is required, which is very expensive. Especially when a roadside beacon is used, the reception area of each beacon is limited, so that the IC card 3 cannot be rewritten unless the desired transmission area is reached. It's inconvenient.

Therefore, the present invention has been made to solve the above problems, and an object thereof is to make it possible to update stored information in a recording medium very easily.

[0011]

A recording medium for an automobile information providing system according to the present invention is provided with map information of each region,
Information is transmitted in a recording medium for an information providing system for automobiles, which stores facility information or the like indicating the position of a restaurant, a shopping center, etc., and the stored information is read by the reading means to display the information on the display means under the control of the control means. A receiving circuit for receiving update information transmitted from the station, an external antenna terminal and an internal antenna connected to the receiving circuit, a buffer memory and a main memory for accumulating the update information received by the receiving circuit, and the reading Means controls the buffer memory during the reading of information from the main memory by means to temporarily store the received information by the receiving circuit in the buffer memory, and controls the transfer of the stored information from the buffer memory to the main memory after the reading is completed. And an access control circuit for performing.

[0012]

According to the present invention, since the recording medium is provided with the receiving circuit, the buffer memory, the main memory and the access control circuit, it is possible to receive the update information transmitted from the information transmitting station and to a facility equipped with a specific rewriting device. It is not necessary to go out and update the information on the recording medium, and the stored information on the recording medium can be automatically updated.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing a schematic configuration of an embodiment when applied to an IC card of a recording medium for an information providing system for automobiles of the present invention, FIG. 2 is a partial detailed block diagram, and FIG. Is a flowchart for explaining the operation.

The overall schematic structure of this IC card will be described. In FIG. 1, reference numeral 11 is a receiving circuit for receiving update information transmitted from an information transmitting station (not shown), and 12, 13.
Is an external antenna terminal and an internal antenna connected to the receiving circuit 11, 14 and 15 are a buffer memory and a main memory which are shift registers for accumulating update information received by the receiving circuit 11, and 16 is an access control circuit. Main memory 15 by the card reader 1 shown in FIG.
While the information is being read from the buffer memory 14, the buffer memory 14 is controlled to temporarily store the information received by the receiving circuit 11 in the buffer memory 14, and after the reading is completed, the transfer of the stored information from the buffer memory 14 to the main memory 15 is controlled.

At this time, the update information is received via the internal antenna 13 when the IC card is inserted into the card reader 1 in the vehicle, and the antenna terminal is taken out when the IC card 3 is taken out from the card reader 1. 12
The update information is received via the external antenna connected to the.

Next, the operation when the IC card is inserted into the card slots 2a and 2b of the card reader 1 will be described. As shown in FIG. 2, the update information received by the receiving circuit 11 comprises a shift register. The address accumulated in the buffer memory 14 and output from the access control circuit 16 via the address bus AB together with the accumulated data from the buffer memory 14 are transmitted via the data bus DB to the interface circuit (hereinafter referred to as IF
One of the three-state buffers 21 that compose 20
Entered in.

The enable terminal E of the 3-state buffer 21 is connected to the control terminal C of the access control circuit 16, the control signal from the access control circuit 16 causes the 3-state buffer 21 to operate, and the data from the buffer memory 14 is the main data. The data is transferred to and stored in a predetermined address of the memory 15.

Further, the control terminal C of the access control circuit 16 is connected to the enable terminal E of the other 3-state buffer 23 via the inverter 22 of the IF 20, and the 3-state buffer 23 is the above-mentioned one 3-state buffer 21. It operates when it is not operating, reads the data of the address specified by the display ECU 4 from the main memory 15 via the address bus AB, and sends the read data to the display ECU 4 via the data bus DB. .

By the way, the access flag AF from the access control circuit 16 to the display ECU 4 is at a high level (hereinafter referred to as H
Only), the display ECU 4 can access the main memory 15, and the control signal from the access control circuit 16 causes the other three-state buffer 23 to operate and read the main memory 15, as described above. During this time, the information received by the receiving circuit 11 is accumulated in the buffer memory 14, and when the display ECU 4 finishes reading the main memory 15, one of the three-state buffers 21 is operated by the control signal from the access control circuit 16 to operate the buffer memory. The accumulated data of 14 is transferred to the main memory 15.

Next, a series of control operations will be described with reference to the flowchart of FIG.

First, the operation of the display ECU 4 will be described.
As shown in FIG. 3A, it is determined whether the access flag AF of the access control circuit 16 is H (step S1). If the determination result is NO, the determination result is YES.
The determination in step 1 is repeated until the above, and if the determination result is YES, the data is read from the main memory 15 as described above (step S2), and then the operation ends.

Further, the operation of the access control circuit 16 will be described. As shown in FIG.
The address sent from 6 is set to "0" (step T1), the control signal from the access control circuit 16 and the access flag AF both become H (step T2), and the other three states are set by the H control signal. Only the buffer 23 operates and the display ECU 4 becomes accessible by the H of the access flag AF, and it is determined whether or not the reception circuit 11 has started to receive the update information (step T3).

If the determination result of step T3 is NO, the determination of step T3 is repeated until the determination result is YES. If the determination result is YES, the access flag AF from the access control circuit 16 is at low level. After being set to (hereinafter referred to as L) (step T4), it is determined whether the reception of the update information by the receiving circuit 11 is completed (step T5). If the determination result is NO, the determination result is YES. The determination in step T5 is repeated until

On the other hand, if the decision result in the step T4 is YES, the control signal becomes L (step T6),
While the other three-state buffer 23 stops operating, the other three-state buffer 21 operates, and the accumulated data in the buffer memory 14 is transferred to and stored in the main memory 15 (step T7), and is sent from the access control circuit 16. After the address to be incremented is incremented (step T8), the process returns to step T2 and the above-described operation is repeated.

Therefore, the IC card receiving circuit 11 causes the receiving circuit 11 of the IC card to appropriately transmit update information such as road traffic congestion information, parking lot vacancy information, and bargain information of shopping centers that change in a short time. These updates can be automatically received, and I
There is no need to go to a facility equipped with a specific replacement device to update the information on the C card, and it is extremely easy to carry out IC
The information stored in the card can be updated, and it is suitable as a memory for information providing systems for automobiles.

By the way, the card slots 2a and 2b of the card reader 1 described above may be dedicated slots for a conventional IC card having no receiving circuit and an IC card having a receiving circuit as in the present embodiment. Both the slots 2a and 2b may be commonly used for the conventional type and the present example type IC card. In the case of being shared in this way, the IF 20 on the display ECU 4 side can be shared.
The price of the display ECU 4 can be reduced.

Of course, the present invention can be applied to other than the above IC card.

[0028]

As described above, according to the recording medium for the automobile information providing system of the present invention, since the recording medium is provided with the receiving circuit, the buffer memory, the main memory and the access control circuit, the information is transmitted from the information transmitting station. It is possible to receive the update information that is stored in the recording medium and automatically update the information stored in the recording medium, which is suitable as a memory for the information providing system for automobiles, and the function of the information providing system for automobiles can be improved. .

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a recording medium for an automobile information providing system of the present invention.

FIG. 2 is a block diagram for explaining the operation of the present invention.

FIG. 3 is a flowchart for explaining the operation of FIG.

FIG. 4 is a schematic diagram showing a configuration of a general automobile information providing system.

[Explanation of symbols]

 11 receiving circuit 12 external antenna terminal 13 internal antenna 14 buffer memory 15 main memory 16 access control circuit

Claims (1)

[Claims] 1. An automobile in which map information of each region, facility information indicating a position of a restaurant, a shopping center, or the like is stored, and the stored information is read by the reading means to display the information on the display means under the control of the control means. In the recording medium for the information providing system, the receiving circuit for receiving the update information transmitted from the information transmitting station, the external antenna terminal and the internal antenna connected to the receiving circuit, and the update information received by the receiving circuit are provided. A buffer memory and a main memory for accumulating, and controlling the buffer memory during the reading of information from the main memory by the reading means to temporarily accumulate the information received by the receiving circuit in the buffer memory, and from the buffer memory after the reading is completed. And an access control circuit for controlling transfer of stored information to the main memory. Automotive information providing system for a recording medium, characterized in that there was e.