Light guide structures for display backlights
US9805630B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2012 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Jan 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electronic device may have a display with backlight structures. The backlight structures may produce backlight that passes through the display layers in the display. The backlight structures may include a light guide plate that distributes light across the display layers. A light source such as a light-emitting diode light source may be used to provide light to the light guide plate. The light source may overlap an edge portion of the light guide plate. A light guide structure having a bend may be coupled between the light source and the light guide plate. The light guide structure may be used to guide the light from the light source to the light guide plate via total internal reflection. A light guide structure may be provided with light leakage promotion structures to evenly distribute light from a centralized light source along the edge of a light guide plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.