Optical navigation apparatus
US8890844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2010 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Feb 12, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/042
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical navigation apparatus comprises a substrate with a sensor integrated circuit and an infrared source formed thereon; a sensor cover shielding the sensor integrated circuit and the infrared source; at least one visible light source formed outside the sensor cover and electrically connected with the substrate; a light guide located outside the sensor cover and covering the visible light source; and an outer housing covering the light guide and the substrate, and the outer housing comprises an infrared window and a side wall capable of guiding visible light towards and illuminating a region of the outer housing. In such an arrangement, the outer housing of the present invention is not only used as a casing for protection, but also served as light guide and distribution structure to reflect and re-distribute light sufficiently to achieve a uniform illuminated character shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.