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:
Dec. 25, 2012
Filed:
Mar. 05, 2008
Jason L. Frazier, Redmond, WA (US);
Jason L. Frazier, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A keyboard or keypad which can highlight symbols on the keys by illuminating them. The keys are backlit by two light sources, one visible and one ultraviolet, each of which illuminates multiple keys. One symbol on each key is designed to transmit the visible light, becoming highlighted when the visible light source is activated. A second symbol on each key is designed to fluoresce when illuminated by ultraviolet light, becoming highlighted when the ultraviolet light source is activated. If desired, both light sources can be activated, highlighting both symbols simultaneously. If desired, complementary light color and filter material may be used to reduce or eliminate transmission of light through the second symbol. A single pair of light sources may be used for the entire keyboard or the keyboard may be divided into segments with separate light sources for each segment.