Double-Sided Mobile LCD - Samsung

Samsung announced that it has created the first LCD panel that can produce independent images on each side of a mobile LCD display. This will replace two display panels with one, reducing overall thickness of mobile phones by at least 1mm.

This double-sided LCD use of Samsung's double-gate TFT architecture. TFT gates are electronic components that convert the necessary voltage at the pixel level, which controls the liquid crystal alignment needed to reproduce on-screen images. Samsung's new double-sided LCD has two gates that operate each pixel instead of one, o front and on the back.

Double gates: The gate is a transistor element to which voltage is applied to turn on or off the circuit that provides the signal needed to drive the LCD. Normally, one circuit is needed for every pixel to make a single screen function, but Samsung’s new double-screen LCD has two gates to control each pixel, a necessary condition for allowing the same pixel to be used for two different screens.

Key Specifications:

• Display size 2.22″ 2.22″
• Resolution qVGA (240 x 320) qVGA (240 x 320)
• Display type transmissive reflective
• Brightness 250 nit 100 nit
• Colors 265K 265K
• Color saturation 60% 10%
• Module thickness 2.6mm

The new Samsung mobile display requires only one backlight. One side of the panel operates in a transmissive mode, while the other operates in a reflective mode. By using a unique reflective design that utilizes the light trapped in the opposing screen’s transmissive mode, the reflective mode does not solely rely on external light sources such as the sun.

Source: Samsung Electronics