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:
Nov. 04, 1986
Filed:
Aug. 15, 1983
Earl F Brown, Piscataway, NJ (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A video display touch detection digitizer for generating the coordinate position when the video display is touched. The light signals for the X and Y coordinate array are generated from the raster scan signals of the video display during selected periods of the vertical and horizontal blanking intervals. Vertical and horizontal mirrors reflect, respectively, the resulting row and columns of light signals across the screen of the video display where other mirrors reflect the signals to, respectively, row and column signal detectors. Control circuitry detects the resulting interruption in the rows and columns of light signals when the screen of the video display is touched and generates signals representing the touch coordinates.