Light guide plate, surface light source device and transmissive display apparatus
US8550687B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2012 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Apr 25, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0038
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light guide plate shaped substantially like a plate includes a light incident surface, a light exit surface and a reflective surface, which is opposite to the light exit surface, configured to reflect light toward the light exit surface. A plurality of optical units is arranged along the reflective surface in a direction orthogonal to the light incident surface. Each optical unit is shaped substantially like a quadratic prism that is convex toward the reflective surface and has a top surface and two slopes being formed opposite to each other with respect to the top surface. A dimension of the top surface is constant in a direction of arrangement of the optical units and an interval between adjacent optical units becomes greater as the adjacent optical units lie further away from the light incident surface in the direction of arrangement of the optical units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.