Nissan Motor Company Limited

Xanavi Informatics Corporation

Gaku Sone

Hirohisa Miyazawa

Seiichi Kozaki

Hirohisa c/o Xanavi Informatics Corp Miyazawa

In a data access method for accessing data in an on-vehicle information device having an on-vehicle memory unit that allows data stored therein to be read out and overwritten by an external apparatus and an on-vehicle control unit that executes a data read and a data overwrite by controlling the on-vehicle memory unit, supplying power to the on-vehicle information device from the external apparatus when a power switch at the on-vehicle information device is in an OFF state, and reading out the data in the on-vehicle memory unit and overwriting the data through control implemented by the external apparatus.

Data access method and data access apparatus for accessing data at on-vehicle information device

In method and apparatus for displaying a road map mesh in a form of a bird's eye view on a display screen of a display unit, a virtual viewpoint at an upper sky behind a predetermined point of display reference (such as a present position of a mobile body, e.g., a vehicle) by a predetermined spatial distance is set, a part of the plan view formed road map mesh Z which is ahead of the predetermined display reference point is looked down along a line of sight along a predetermined looking down angle, the display screen Y is set on a plane vertical to the line of sight, the road map data on the plan view formed road map mesh corresponding to respective pixles on the display screen Y are extracted, and the bird's eye view on the display region X for the bird's eye view on the plan view formed road map mesh Z on the display screen Y on the basis of the extracted road map data.

Method and apparatus for displaying road map in form of bird's eye view

A display system mounted on a vehicle is designed to display a road map image around the vehicle with one or more directional congestion marks each indicating the position and direction of a congested traffic by receiving traffic information by radio communication. The directional congestion mark is in the form of an arrow or a series of arrows. Therefore, the driver can readily perceive the direction of a congested traffic.

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Yokohama, Japan

Gaku Sone