The touch screen technology is widely used in PDA, smart phone, PMP, ATM, information kiosk and many other equipments in industrial, medical and commercial environment. Actually the technology enables these devices are not new, which was invented by Dr. Samuel C. Hurst in 1971. But it becomes more hotter after the release of popular iPhone and iPod. With new patents filed for the touch screen technology, Apple brings a new wave to this mature segment and more companies are involved in this revolution with improved interactive UI, silicons, assembly modules and software components.