Fujitsu Ltd developed a clamshell mobile phone that is equipped with two touch-sensitive LCD panels on its upper and lower chassis and exhibited it at Ceatec Japan 2010.
"It is possible to show different applications on the upper and lower panels as well as to divide the screen of an application, such as mail and photo applications, on the two panels," the company said. "For example, by defining the upper panel as 'social' and the lower panel as 'local,' it becomes possible to visualize data and message being exchanged between the two areas."
Both of the two panels are capacitive touch panels and have the "Swing Side Motion" function, which enables to rotate a screen by 90°.
The screen sizes of the upper and lower panels are 3.4 and 3.5 inches, respectively. Their pixel count is 480 x 960. Because the handset is a prototype, the pixel count of its camera is only 300,000. Though the capacity of its lithium-ion rechargeable battery has not been disclosed, Fujitsu said, "The power consumption of the handset is about 1.5 times higher than that of a normal mobile phone."
The prototyped handset is capable of wireless communication via a wireless LAN. It is also equipped with a communication module for 3G networks. But the company temporarily disabled it because the handset has not been certified by the Japanese government yet.
The operating system is Symbian, but the user interface of the handset can be used with the Android platform too, Fujitsu said. The company has not yet determined when to commercialize the handset.