Optical gating scheme for display touch control
CA 1205226 A · Owner: Zenith Radio Corporation · Inventors: Deitch, Leonard; Knowles, Terrance J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 27, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.