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:
Aug. 01, 2000
Filed:
Oct. 28, 1997
Thomas Jakobs, Alma, AR (US);
InvoTek Corporation, Alma, AR (US);
Abstract
A laser actuated keyboard system (10) includes a laser pointer (12) mounted on an adjustable headband (14) for directing a collimated beam (16) onto a laser keyboard (18) defined by an array of photosensors (58) that are intended to be illuminated by the user-targeted beam (16). During a laser acquisition mode, the laser pointer (12) output is controlled to provide a relatively retina-safe output and during the captured signal mode, the laser pointer (12) output is controlled to provide a higher-power mode sufficient to be easily seen. During the higher-power mode, the laser pointer (12) is modulated at a selected frequency to assist the laser keyboard (18) in discriminating against common background light. A successful keypress is declared when the beam (16) illuminates a targeted area for a selected percentage of a pre-determined dwell period.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile