Patent ID: 8135536

Claim:
A route lead guidance system, comprising: a display screen to display a route guidance image; an acceleration detecting device to detect acceleration; a route storage memory to store a route from a starting point to a destination, and to store a guidance point located on the route at which guidance is provided to the user; and a controller, the controller comprising a route guidance image creator to create the route guidance image including a route image specifying the route, and to create a lead image showing a lead position on the route ahead of a user's current position to lead the route; a walk detector to detect the user's walking based on the acceleration detected by the acceleration detecting device; a lead position updater to update the lead position in accordance with the user's walking as the user's walking is detected by the walk detector, wherein the lead position updater includes a lead position calculator that calculates a moving distance of the lead position based on a predetermined time period during which walking is detected by the walk detector and a preset moving speed of the lead position, and the lead position updater updates the lead position based on the calculated moving distance of the lead position; a guidance point judger to judge whether the lead position arrives at the guidance point on the route; and wherein the lead position updater suspends updating of the lead position as the lead position arrives at the guidance point.