Invention Grant
US08131466B2 Navigation system, enlarged intersection image displaying method used in the system, and map information generating method
有权
导航系统,系统中使用的放大交叉路口图像显示方法,以及地图信息生成方法
- Patent Title: Navigation system, enlarged intersection image displaying method used in the system, and map information generating method
- Patent Title (中): 导航系统,系统中使用的放大交叉路口图像显示方法,以及地图信息生成方法
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Application No.: US12028298Application Date: 2008-02-08
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Publication No.: US08131466B2Publication Date: 2012-03-06
- Inventor: Tatsunori Iwatani
- Applicant: Tatsunori Iwatani
- Applicant Address: JP Tokyo
- Assignee: Alpine Electronics, Inc.
- Current Assignee: Alpine Electronics, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Brinks Hofer Gilson & Lione
- Priority: JP2007-048843 20070228
- Main IPC: G01C21/32
- IPC: G01C21/32 ; G08G1/123

Abstract:
When a vehicle travels along a guidance path and approaches an intersection, a vehicle navigation system determines crossing points between a circle having its center set to the intersection and a predetermined radius, and an approach link and an exit link for the intersection. The system also sets a direction connecting the crossing point for the approach link and the intersection as an approach direction, and sets a direction connecting the intersection and the crossing point for the exit link as an exit direction. The system determines a traveling direction at the intersection based on an angular difference between the approach direction and the exit direction, and determines a display position of the intersection on a screen. Further, an enlarged intersection image is drawn such that the approach direction is aligned with a 12 o'clock direction on the screen.
Public/Granted literature
Information query
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