Light guide plate, light source device equipped therewith and display device
US7073933B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2002 |
| Grant date | Jul 11, 2006 |
| Priority date | — |
| Expiry date | Jun 7, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0068
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A display device used for a display unit of portable electronic equipment, a light source device therefor and a light guide plate, suppressing dispersion in the brightness and featuring a high contrast and a good display quality. The constitution includes a light incidence surface on where light emitted from an LED falls, a light reflection surface formed facing the light incidence surface and reflects light from the light incidence surface, a light outgoing surface arranged between the light incidence surface and the light reflection surface, and has a circularly polarizing plate intimately adhered onto the surface thereof, and an opposing surface formed facing the light outgoing surface and in which there are alternately arranged first opposing surfaces for guiding the incident light to the light outgoing surface as well as to the light reflection surface, and second opposing surfaces for emitting the light reflected by the light reflection surface through the light outgoing surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.