| 20100073205 | PORTABLE ELECTRONIC DEVICE - A portable electronic device is provided. The portable electronic device includes a central processing unit, a projecting module electronically connected to the central processing unit, a virtual keypad projection module configured to project a virtual keypad on a surface, an infrared radiation generator configured to irradiate infrared light generally parallel with the virtual keypad and an infrared sensor module configured to receive infrared light reflected by fingers of a user pressing the virtual keypad and generate corresponding signals and then send the signals to the central processing unit for the central processing unit to produce commands corresponding to the pressed virtual keypads. | 03-25-2010 |
