Navigation system, portable terminal device, and vehicle-mounted device

Abstract

A navigation device is constructed such that a vehicle-mounted device collects position information and movement information on a vehicle, provides a portable terminal device with the collected information, and displays image data received from the portable terminal device, and that the portable terminal device acquires map information from a map center device based on the position information and movement information received from the vehicle-mounted device, calculates the current position of the vehicle based on the position information and movement information received from the vehicle-mounted device, and creates image data formed by overlaying the calculated current position on the acquired map information.

Description

technical field [0001] The present invention relates to a navigation system, a portable terminal device, and a vehicle-mounted device that provide route information including the current position of the vehicle by using a vehicle-mounted device mounted on a vehicle and a portable terminal device carried by a passenger, and particularly relates to a system that suppresses A navigation system, a portable terminal device, and an in-vehicle device that can perform accurate navigation while duplicating resources. Background technique [0002] There is known a car navigation system that calculates the current position by using GPS (Global Positioning System), gyroscope, vehicle speed sensor, etc. to synthesize the position of the vehicle and map information about surrounding roads or buildings, and then display it on a display. [0003] In addition, as the performance of portable terminal devices such as mobile phones and PDAs (Personal Digital Assistant) has improved, navigation ...

AI Technical Summary

Problems solved by technology

[0007] However, when realizing a car navigation system using the technology of Patent Document 1 or Patent Document 2, a problem arises due to the unique nature of the navigation function mounted on the mobile terminal device.

[0008] Specifically, since the navigation function mounted on a portable terminal device such as a mobile phone is based on the speed at which a person moves, there is a problem that the map cannot be updated following the speed of the vehicle.

In addition, in the navigation function for mobile terminal devices, since the current position is calculated only based on the GPS function without using movement information such as a vehicle speed sensor, there is a possibility that the map cannot be matched and the vehicle is displayed outside the road. current location problem

[0009] However, when it is desired to realize a navigation system by cooperating with an in-vehicle device mounted on a vehicle and a portable terminal device carried by a passenger, if there are overlapping functions in each device, there is a possibility that it will eventually become an expensive system. question

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