| 摘要 |
PROBLEM TO BE SOLVED: To quickly make alteration of a text part displayed on a running guide map without causing any blank time. SOLUTION: This device is provided with multiple VRAMs 13 storing road data in one of them in the state of drawing, multiple VRAMs 13 storing text data in one of them in the state of drawing, and a display control circuit 14 which displays the road data and the text data stored in VRAMs 13 superposing on the screen, and when a text switch instruction is inputted from the text switch 21, the navigation CPU 11 draws in one of VRAMs 13 in the text data corresponding to the switch instruction. |
