(73) Assignee: Logitech Europe S.A.,
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 474 days.
(21) Appl. No.: 10/025,838
(22) Filed: Dec. 18, 2001
(65) Prior Publication Data
US 2002/0109672 Al Aug. 15, 2002
Related U.S. Application Data
(60) Provisional application No. 60/258,133, filed on Dec. 22, 2000.
(51) Int. CI.
G09G 5/08 (2006.01)
G09G 5/00 (2006.01)
(52) U.S. CI 345/157; 345/158; 345/163;
(58) Field of Classification Search 345/163,
345/173, 157 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
4,550,221 A * 10/1985 Mabusth 345/173
A solid-state roller on a pointing device with enhanced features. The solid-state design described herein allows the sensor to be placed on any shape of surface, such as one that has curvature in two directions. In one embodiment, a trench or downward curve contains sensors for detecting finger movement. The user's finger can thus bend about a knuckle in a curved motion to activate the sensor, requiring little or no movement of the finger up and down. The solid-state sensors can be of one of a number of designs. In one embodiment, multiple electrodes are contacted by a finger as it moves. Each electrode is coupled to a capacitive detection circuit, for detecting the change in capacitance as the electrode is contacted by the finger.
9 Claims, 13 Drawing Sheets