Backlighting for optical finger navigation
US8605035B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2010 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Sep 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03547
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical finger navigation (OFN) device includes an OFN sensor module, a light source, and a vertical light guide. The OFN sensor module is coupled to a circuit substrate. The OFN sensor module generates a navigation signal in response to a movement detected at a navigation surface based on light reflected from a user's finger. The light source is also coupled to the circuit substrate. The light source generates light (which is separate from the light generated for the OFN sensor module). The vertical light guide is disposed to circumscribe a perimeter of the OFN sensor module. The vertical light guide receives the light from the light source and guides the light toward a light emission surface at a perimeter surface area circumscribing the navigation surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.