Algorithmic compensation system and method therefor for a touch sensor panel
CA 2242663 C · Owner: Elo Touchsystems, Inc. · Inventors: Babb, Joe Henry; Wilson, Geoffrey D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A general method is described for producing an inexpensive touchscreen system that provides accurate positional information and compensates for manufacturing variations without complicated sensor arrangements. Utilizing a set of sensed signals (160) that are unique to each location on the touchscreen sensor, equations for X and Y (162) are derived via curve fitting methods. The coefficients (163) of the equations are stored with the sensor. During touchscreen operation the coefficients are used to calculate X and Y (164) to the desired accuracy directly and independently.
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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
- Filed March 13, 1997 and granted April 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2019.
- 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.