Ultrahigh-resolution LCDs with oxide semiconductor TFTs

Along with the development of liquid crystal displays, semiconductor technology for driving these screens has advanced dramatically. This chapter explains the latest technology, the oxide semiconductor thin-film transistor (TFT), and its display application. The oxide semiconductor TFT features low leakage current and high electron mobility, which are not found in conventional amorphous silicon (a-Si) and low-temperature polycrystalline silicon (LTPS) semiconductors. These characteristics are effective for liquid crystal displays with high definition, a narrow frame and low power consumption, and the oxide semiconductor TFT is widely used in small high-definition displays such as smartphones up to large nextgeneration 8K TVs (7,680 × 4,320 pixel).