Shared electrode pattern field effect sensor and joystick...

Details Shared electrode pattern field effect sensor and joystick... Shared electrode pattern field effect sensor and joystick...

2005-12-22

2010-06-08

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C178S018060

Reexamination Certificate

active

07733333

ABSTRACT:
The present invention is directed to a shared electrode pattern field effect touch sensor apparatus. The apparatus includes first and second spaced electrode patterns, each having an inner electrode and an outer electrode. The inner electrode includes a primary portion defining a primary sense area and at least one secondary portion. Secondary portions of at least two patterns are adjacently disposed, and define secondary sense areas. A pulse generation circuit and a detection circuit are electrically coupled to each pattern. The presence of an object proximate a primary sense area activates one detection circuit. The presence of an object proximate a secondary sense area activates two detection circuits. A controller in communication with the detection circuits senses activation of the detection circuits. In a preferred embodiment, the apparatus is a navigational control device. A method of processing touch sensor field effect signals is also disclosed.

REFERENCES:
patent: 4242676 (1980-12-01), Piguet et al.
patent: 4290061 (1981-09-01), Serrano
patent: 6320282 (2001-11-01), Caldwell
patent: 7180017 (2007-02-01), Hein
patent: 3910977 (1990-10-01), None
patent: 2022264 (1979-12-01), None
PCT Search Report Dated Jun. 26, 2006.

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