Virtual screen input system for mobile phone

Instead of pressing a key on a mobile phone, if you use a pen to project a virtual area projected by a laser, you will automatically recognize it and input it. Feel like handwriting recognition + virtual screen keyboard. This is Samsung's patent which was filed in this prior application.
Wireless, cell phones, mobile phone reviews
http://www.unwiredview.com/2006/04/14/samsung-virtual-screen/

Input like this




By the way, this keyboard version already exists.

NIPPON STYLE :: "Virtual Keyboard (VKB)"
http://www.tanomi.com/limited/html/00034.html

Virtual Keyboard
http://park16.wakwak.com/~ex4/kb/main_vkb.htm