Touchscreen

Touch Screen Panel:
http://en.wikipedia.org/wiki/Touchscreen

I bought a Nokia 5230 smartphone which applies resistive touchscreen panel technology.

The touch screen technology will gain big markets in the consumer products.

电阻式触摸屏(resistive touchscreen panel)

http://baike.baidu.com/view/650013.htm

红外线触摸屏

http://baike.baidu.com/view/1011689.htm

电容式触摸屏( Capacitive touch screen )
http://baike.baidu.com/view/414068.htm

表面声波触摸屏

触控一体机

Optical Imaging: new technology
for big screen.