Backlight control for a handheld computing device
CA 2509028 C · Owner: Lowles, Robert · Inventors: Drader, Marc A.; Lowles, Robert; Robinson, James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a handheld computing device that includes a backlit display having a variable-intensity backlight and a function key, a method for controlling an intensity of light produced by the backlight involves the steps of (1) setting the intensity to a first level sufficient for viewing information on the display under first ambient lighting; and (2) upon activation of the function key setting the intensity to a second level sufficient for viewing information on the backlit display under second ambient lighting that is different than the first ambient lighting.
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
- Filed June 2, 2005 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.