Double-sided backlight and assembly incorporating a double-sided light source coupling light guide
US7972051B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2006 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Jun 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2250/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Described are a backlight, a backlight assembly for use in an electronic device and an electronic device configured to activate the backlight's first light source and to activate the backlight's second light source independently of one another. The described double-sided backlight may illuminate either the primary display or the secondary display. The disclosed backlight includes two light sources, each used to direct light in opposite directions from the double-sided backlight. The light guide of the backlight is configured to direct light from the first light source in a first direction to exit the light guide via its first face, and to direct light from the second light source in a second direction different from the first direction to exit the light guide via its second face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.