| 摘要 |
PROBLEM TO BE SOLVED: To make no voice output in screen switching for an image plane displaying device to prevent a voice uncomfortable and rasping to a user from being produced. SOLUTION: This device is a device for switching the screen of a navigation system for receiving a broadcasting signal comprising an image and an aural signal to output selectively an image signal and an aural signal of a desirable image plane mode on the image plane displaying device and a voice reproduction part based on the broadcasting signal and based on an image signal and an aural signal for the navigation system. The device is provided with a retrieving means for retrieving the image plane mode desired by the user, and an electronic control circuit part to which a retrieved result retrieved by the retrieving means is input, the electronic control circuit part outputs the image signal of the image plane mode desired by the user selectively to the image plane displaying device based on the retrieved result by the retrieving means, and outputs selectively the aural signal of the desirable image plane mode delayed by a precribed preset time with respect to the image signal of the desirable image plane mode to the voice reproduction part. |
