Lid-closed detector

1. A portable computer, comprising:

a display assembly coupled to a base assembly to alternate between a closed position and an open position; and

an input device disposed on said base assembly, said input device having a capacitive sensing surface to sense a proximity with a portion of said display assembly to detect said display assembly in said closed position.

2. The portable computer of claim 1 , wherein said input device comprises a touchpad.

3. The portable computer of claim 2 , further comprising a keyboard disposed near said touchpad, said touchpad having a width that is substantially similar to a width of said keyboard.

4. The portable computer of claim 3 , wherein said keyboard comprises a full-size keyboard layout.

5. The portable computer of claim 1 , wherein said portion of said display assembly comprises a conductive material.

6. The portable computer of claim 5 , wherein said portion of said display assembly comprises a bezel to frame a display screen, and wherein said bezel contacts a touchpad in said closed position.

7. The portable computer of claim 6 , wherein said bezel comprises a substantially metallic material.

8. A portable computer detector, comprising:

a capacitive sensing surface to detect one or more objects in a manner that can be interpreted by a portable computer to generate cursor movement, said sensing surface having a first region and a second region which, when said second region receives a first input, indicates that a lid portion of said portable computer is in a closed position.

9. The portable computer detector of claim 8 , wherein when said first region is sensed, indicates that the lid portion of said portable computer is in an open position.

10. The portable computer detector of claim 8 , wherein said sensing surface comprises a conductive touch-sensor pad.

11. A method, comprising:

providing a portable computer system having a display assembly coupled to a base assembly, said base assembly having a touchpad;

sensing with said touchpad whether said display assembly is closed over said base assembly or open over said base assembly; and

activating an input mode for said portable computer system when said touchpad senses that said display assembly is open over said base assembly.

12. The method of claim 11 , wherein sensing further comprises activating a sleep mode for said portable computer system when said touchpad senses that said display assembly is closed over said base assembly.

13. The method of claim 11 , further comprising repeating a sensing operation continuously while said portable computer system is in a power “ON” mode.

14. A method, comprising:

providing a portable computer system having a display assembly coupled to a base assembly, said base assembly having a touchpad, said touchpad having a first sensing region and a second sensing region; and

detecting said display assembly over said base assembly, wherein a portion of said display assembly comes into close proximity with a substantial portion of said second sensing region and while no portion of said first sensing region contacts said display assembly to indicate that said portable computer system is in a lid-closed position.

15. The method of claim 14 , wherein closing further comprises contacting said first sensing region with a bezel of said display assembly.

16. The method of claim 15 , wherein detecting further comprises reporting a lid-closed signal to said portable computer system.

17. The method of claim 16 , wherein detecting further comprises activating a sleep mode for said portable computer system.

18. The method of claim 16 , wherein detecting further comprises repeating a sensing operation continuously while said portable computer system is in a power “ON” mode.