Quietly mentioned in Apple’s tech specs for the fifth-generation iPod nano is the fact that the new models use a TFT (thin film transistor) display as opposed to the standard LCD used in past models. TFT displays are a different variant on LCD technology, that can under some circumstances improve or decrease image quality; Wikipedia notes that depending on the type of TFT screen technology chosen, viewing angles and colors can be mediocre—a problem with early technology—or dramatically more impressive, with high contrast ratios, strong black depth, and faster refresh rates.
By comparison, Apple lists the display in the fourth-generation iPod nano as a color LCD with LED backlight. It is unclear what, if any, affect the change in screen technologies will have on the quality of the iPod nano’s screen.
.
