The U.S. Patent Office has granted a patent that described a method for creating a seamless display in a foldable device. The patent, which was filed by Samsung in October 12, 2010 and was granted to the company on December 11, 2012, describes a method for displaying an image on a plurality of display panels connected together.

A foldable display device includes two display panels, which are pivotally coupled to each other. However, the pixels located at junction parts of the display panels are separated by about 1 mm, so that a black stripe appears between images displayed on the two display panels. In order to minimize a thickness of the black stripe, the distance between the pixels at junction parts of the display panels needs to be minimized.

According to Samsung's technique Samsung puts smaller but brighter pixels right at the joints between two displays, letting Samsung push the screen borders closer together while ramping up the brightness to have those edge pixels blend in with the rest.

The patent can be applied to organic electroluminescent light emitting devices ("OLED"), field emission displays ("FED"), plasma display panels ("PDP"), or inorganic electroluminsecence ("El") devices, according to Samsung.

There's no indication so far that Samsung could start producing foldable phones and tablets.