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. 14, 1985
Filed:
Aug. 12, 1982
Applicant:
Inventors:
Leonard Deitch, Skokie, IL (US);
Terrance Knowles, Lincolnshire, IL (US);
Assignee:
Zenith Electronics Corporation, Glenview, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340712 ; 3403 / ; 340794 ; 340707 ; 178 18 ; 250221 ; 250549 ;
Abstract
A touch-operated display for a CRT faceplate includes a plurality of optical gates for energizing light-emitting diodes in response to generation of the CRT raster thus eliminating the need for external switching of the beam generating means to produce the grid of crossing light paths. A frame is disclosed for mounting the light sources, detectors and common optical gates--all of which take the form of silicon chips.