Prompting method of vehicle-mounted device and navigation routes

Abstract

The invention provides a prompting method of a vehicle-mounted device and navigation routes. The vehicle-mounted device comprises a comparing unit, a first different section obtaining unit, a second different section obtaining unit and a prompting unit, wherein the comparing unit is suitable for comparing a first navigation route and a second navigation route to obtain the same road chain constitute the first navigation route and the second navigation route, and the first navigation route and the second navigation route have the same start and the same finish. The first different section obtaining unit is suitable for a first different section which is composed of independent or continuous chains different with the same chain comprised by the first navigation route. The second different section obtaining unit is suitable for obtaining a second different section which is composed of the independent or continuous chains different with the same chains comprised by the second navigation route. The prompting unit is suitable for prompting the first different section and the second different section. The prompting method can prompt the different chains after compare of the two navigation routes in a driving mode, and guarantees traffic safety.

Description

Technical field [0001] The invention relates to the field of in-vehicle navigation, in particular to an in-vehicle device and a method for prompting navigation paths. Background technique [0002] With the rapid development of the automobile industry, more and more in-vehicle devices have been developed, such as in-vehicle navigation systems, GPS (Global Positioning System) positioning, TTS (Text to Speech) broadcasting, in-vehicle DVD playback, and in-vehicle communications. At present, the application of using GPS (Global Position System, global positioning system) to locate the current position of a vehicle is already common. Vehicle navigation devices formed by positioning systems combined with electronic map data are also increasingly used in people's daily lives. [0003] The prior art car navigation system uses GPS-provided data such as latitude and longitude information and heading to match the road segments in the electronic map data, which can help users find the best dr...

AI Technical Summary

Problems solved by technology

[0004] In many cases, the navigation device will change the current navigation path. For example, the car drives out of the current navigation path by mistake. This makes the user need to carefully check the navigation map to know what changes have taken place in the new navigation path compared with the original navigation path. If the original navigation path has been changed on the navigation map If the navigation path is replaced by a new navigation path and drawn, the user can only compare the new navigation path with his own memory of the original navigation path. These behaviors will bring hidden dangers to driving safety.

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