Abstract: The present invention provides a system and method for adjusting the brightness of a rear seat entertainment monitor for the rear seat passengers of a vehicle in conjunction with the open angle of the monitor. The brightness adjustment system of the present invention includes a monitor open angle input unit, a control unit, an image processing unit and a Liquid Crystal Display (LCD) panel unit. The monitor open angle input unit outputs a gearing amount corresponding to a current open angle of the rear seat entertainment monitor of the vehicle. The control unit calculates the current open angle of the monitor using the gearing amount, received from the monitor open angle input unit, and outputs a control signal required to set parameter values for an output screen image, corresponding to the calculated current monitor open angle.

Abstract: A road instruction information system for a vehicle is provided that provides road data to a destination point through a wireless communications network. The road instruction information system comprises a control terminal mounted in the vehicle, the control terminal transmitting road search request information through a wireless communications network, and receiving road coordinate information through the wireless communications network and informing the driver of the same through images or voice instructions; and an information center receiving the road search request information, and searching potential routes and a destination point from map data and a present position, after which the information center generates road coordinate information and transmits the same to the control terminal.