If you’ve ever used a smartphone, tablet or touch screen computer, you’ve likely used a Thin Film Transistor touch screen. A TFT touch screen is a combination device that includes a TFT LCD display and a touch technology overlay on the screen. The device can both display content and act as an interface device for whoever is using it. TFTs make up the lion’s share of touch screens, with Organic Light Emitting Diode screens being the only other major competitor.
TFTs, also called TFT screens, are a type of active matrix LCD display capable of displaying millions of high-contrast, clear and bright color pixels. TFTs are used in HDTV sets, computer monitors, laptop monitors, tablets, personal media players, smartphones and even feature phones. The first TFT screen came with the IBM ThinkPad’s 1992 model. The TFT technology works by controlling brightness in red, green and blue sub-pixels through transistors for each pixel on the screen. The pixels themselves do not produce light; instead, the screen uses a backlight for illumination. The TFT family also includes LEDs, which are a type of LCD screen that uses an LED as a backlight.