Global Positioning System Display Unit: Description and Operation

Display Unit

System Diagram:

The display unit uses liquid crystal display (LCD). The LCD is a 6-inch wide, Thin Film Transistor (TFT), stripe type with 280, 800 picture elements, The color film and fluorescent light are laid out on the back of the liquid crystal film. The touch sensor on the front of the LCD is an infrared type with 10 vertical and 7 horizontal infrared rays to produce 70 sensing points. The display unit transmits the signal from each operation key and the touch switches to the navigation unit.



Audio Unit
The audio unit receives the audio driving instructions from the navigation unit and transmits the instructions through the front speakers even when the audio system is in use.