Chemical modification removes defects from LCDs

摘要

Anew technique for lining up liquid crystals could pave the way to cheaper and simpler flexible displays. Liquid crystal displays (LCDs) - key components in laptops and flat panel TVs - are controlled by a network of transistors. Crystals change their optical characteristics in response to electrical signals. The panels are made in a complex, multiple-stage process - one of which is prone to defects. A polymer film (called the alignment layer) is applied to the two pieces of glass between which the liquid crystals operate. After this, the film must be rubbed to anchor the alignment of the crystals. The rubbing can damage some of the transistors and introduce dust to the device - reducing the manufacturing yield.