Simplified capacitive touchpad and method thereof

Details Simplified capacitive touchpad and method thereof Simplified capacitive touchpad and method thereof

2005-02-08

2008-10-14

Tran, My-Chau T (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S174000, C178S018030, C178S018060

Reexamination Certificate

active

07436395

ABSTRACT:
In a capacitive touchpad, a plurality of sensing zones are defined, and a controller is connected with a plurality of scan lines for sensing a movement of an object slipping on the plurality of sensing zones, wherein at least one of the plurality of scan lines is connected to at least two of the plurality of sensing zones. The distance, speed and direction of the movement are determined by detecting the object on the touchpad at two positions upon two scans, and thereby the control of a scroll bar is accomplished. The capacitive touchpad is applied for a Z-axis arrangement on a mouse and a scroll arrangement on a keyboard.

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