The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2007
Filed:
Aug. 04, 2003
Hans Rudolf Sterling, Cape Town, ZA;
Hans Rudolf Sterling, Cape Town, ZA;
Ethertouch Limited, Lubuan, MY;
Abstract
A computer system comprises a keyboard (), a display screen (), a first pair of position-sensing electrodes (), a second pair of position-sensing electrodes (), a signal injection electrode (), and an oscillator (). The oscillator injects a signal via the signal injection electrode and the operator's left hand (L) into the operator's body, and this creates a field around the operator's right hand (R). The position-sensing electrodes are arranged underneath the keyboard and sense the strength of the field. This enables the position of the operator's right hand (R) in an X-Y plane above the keyboard to be determined. To this end the position-sensitive electrodes are connected via synchronous detectors () and an analogue-to-digital converter () to a microprocessor (), which operates to control the position of a cursor on the display screen.