| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the degradation of an image quality and to use a plurality of video sources without increasing a cable and a connector in an on-vehicle navigation system in which a display device and a navigation apparatus body are provided. SOLUTION: In a display device 2, a digital interface control part 21 which interfaces image data to he sent from a navigation apparatus body 1 is provided, a frame buffer 22 which displays the image data received by the digital interface control part 21 is provided, and a control processing part 25 is provided. In the navigation apparatus body 1, a frame buffer 14 which stores plotted data is provided, and a digital interface control part 17 which reads out the plotted data so as to be transferred to the display device 2 is provided. The digital interface control part 21 and the digital interface control part 17 are connected by a digital line 3. |
