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:
May. 09, 2006
Filed:
Feb. 24, 2004
Ari Tervonen, Vantaa, FI;
Markku A. Oksanen, Helsinki, FI;
Ari Tervonen, Vantaa, FI;
Markku A. Oksanen, Helsinki, FI;
Nokia Corporation, Espoo, FI;
Abstract
An optical keyboard having a plurality of keys formed on a sheet of transparent material used as light guide. Each key is a dome-shaped element such that the light beam launched into one end of the dome-shaped element spreads over at least part of the dome-shaped element and then converges at another end. The intensity of the re-focused light beam at the converging end can be sensed by a photosensor. When a key is pressed, the deformity on the dome-shaped element changes the focusing properties of the key and thus the sensed light intensity. The dome-shaped elements can be used as individual keys or as a group of keys arranged in a two-dimensional matrix.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile