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:
Mar. 21, 2017
Filed:
Nov. 09, 2012
Applicant:
Blackberry Limited, Waterloo, CA;
Inventors:
Assignee:
BlackBerry Limited, Waterloo, Ontario, CA;
Primary Examiner:
Int. Cl.
CPC ...
G01D 11/28 (2006.01); H01H 11/00 (2006.01); F21V 8/00 (2006.01); H01H 13/83 (2006.01);
U.S. Cl.
CPC ...
H01H 11/00 (2013.01); G02B 6/0021 (2013.01); G02B 6/0088 (2013.01); H01H 13/83 (2013.01); H01H 2219/044 (2013.01); H01H 2219/062 (2013.01); H01H 2227/002 (2013.01); Y10T 29/49105 (2015.01);
Abstract
An apparatus (such as a keyboard) has a plurality of keycaps and a corresponding light guide film disposed on the underside of those keycaps. The light guide film has a periphery, and at least portions of that periphery are thicker than in an interior portion of the light guide film. So configured, more light can be made available for backlighting purposes in the thicker portions than at the thinner portions. These teachings include determining the various (different) thicknesses to employ for the light guide film based upon desired backlighting of one or more of the plurality of keycaps.