A dual-touchscreen is a computer or phone display setup which uses two screens, either or both of which could be touch-capable, to display both elements of the computer's graphical user interface and virtualized implementations of common input devices, including virtual keyboards. Usually, in a dual-touchscreen computer or computing device, the most persistent GUI elements and functions are displayed on one, hand-accessible touchscreen (changing with the software application in use) alongside the virtual keyboard, while the other, more optically-centric display is used for those user interface elements which are either less or never accessed by user-generated behaviors.
This approach is similar to that of the Nintendo DS handheld game console's construction, in which user-generated actions are initialized on the lower resistive touchscreen while the resulting graphical displays are executed in the upper screen. The same approach was adopted on its successor unit, the Nintendo 3DS and a similar concept was created for Nintendo's eleventh home console, the Wii U, with its controller's resistive touchscreen used in the same fashion as the lower part of the DS/3DS, and the secondary screen connected to the console.
