Optical sheet, backlight assembly and display device having the same
US7553050B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2007 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Apr 1, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133607
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optical sheet includes a base film and a light-concentrating member. The light-concentrating member includes light-concentrating protrusions and is disposed on the base film. Each of the light-concentrating protrusions includes first to fourth surfaces. The first and second surfaces are extended from the upper surface along an exterior surface of a first and second cylinder in a clockwise and a counterclockwise direction, respectively. The first and second cylinders have first and second axes that are substantially parallel to each other. The third and fourth surfaces are extended from the upper surface along an exterior surface of a third cylinder in clockwise and counterclockwise directions, respectively. The third axis is substantially perpendicular to the first central axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.