A GPS navigation device with a car rear-viewing function is disclosed herein, which includes a monitor, a GPS navigation module receiving a GPS navigation information and providing it to the monitor, a car rear-viewing module providing a car rear image from a camera to the monitor, a switch unit, and a micro control unit. An area in which a lyophobic portion is not formed is formed on a partition wall other than peripheries of pixel electrodes. First and second spring clips are detachably coupled to the brackets at the ends of the first and second bars, respectively. In one embodiment, the reservoir cap comprises an anode and the control circuitry comprises a cathode and a power source for creating an electric potential between the cathode and the anode.