What is TFT and how does it compare with conventional LCD?
TFT stands for thin film transistor. A TFT is made by depositing thin films for the metallic contacts, semiconductor active layer, and dielectric layer. TFT’s main application is in design of flat-panel displays, a kind of liquid crystal display (LCD). TFTs are the better variant of the LCD technology and more flexible one because with TFTs each pixel is controlled individually by means of several transistors (usually one to four). As of 2004, the TFT technology has been providing the highest resolution of all flat-panel techniques, however it is also the most expensive LCD technology. TFT screens are sometimes called active-matrix LCDs as it incorporates an active-matrix, as opposed to a passive-matrix or “dual-scan” technology, thus the screen is refreshed more frequently than in conventional passive-matrix displays.
