System for disposing a proximity sensitive touchpad behind a...

Details System for disposing a proximity sensitive touchpad behind a... System for disposing a proximity sensitive touchpad behind a...

2006-12-19

2006-12-19

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Including keyboard

C345S169000, C345S175000, C200S0050EA

Reexamination Certificate

active

07151528

ABSTRACT:
A proximity-based mutually capacitance-sensitive touchpad that is disposed directly beneath a keypad keymat of a mobile telephone, wherein posts associated with each key pass through a mutually capacitance-sensitive sensor electrode grid of the touchpad such that the keypad posts do not interfere with touchpad detection and tracking of a pointing object that moves along the keypad surface, to thereby enable touchpad data entry, cursor control, and scroll bar control on a display of the mobile telephone, wherein the keypad posts actuate mechanical switches underneath the touchpad.

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