Light guide plates and backlight module
US8070345B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 20, 2009 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Feb 25, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133611
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light guide plate includes a body having a bottom surface and a light output surface opposite to the bottom surface. A reflector is located on the light output surface opposite to the center of the bottom surface. The reflector is a cavity concaved from the light output surface to the inside of the body. A plurality of scattering dots are located on the bottom surface. The scattering dots are arranged in the form of a plurality of concentric circles around the center of the bottom surface. The number of the scattering dots is defined based on a radius of the circle they reside on, and the radius of the circle is greater than or substantially equal to 4 millimeter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.