Display system
CA 1328755 C · Owner: Guerinot, William Francis · Inventors: Bradley, Ralph Hampton Jr.; Guerinot, William Francis; Shimizu, Jeffrey Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to display systems useful for projection video and television systems performing, with high efficiency and good color rendition. In these systems, color may be provided, as one example by various, light valves, such as liquid crystal displays each of which, are positioned at equal path distances from an illuminating subsystem, as well as having equal path distances from the light valves to a projection subsystem. This enables optimum illumination of each of the light valves. Various embodiments of arranging the light valves, as well as providing illumination are described.
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 April 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 2011.
- 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.