Light guiding film
US8040610B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2010 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Aug 3, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A light guiding film has a film body and a micro-structured portion. The film body has a first side, a second side and a reference horizontal level vertical to the second side. The micro-structured portion is set on the second side and has a plurality of V-shaped grooves, and each one of the V-shaped grooves has a first sub-face and a second sub-face. The first sub-face has a first included angle between 16° and 22° with respect to said reference horizontal level, and the second sub-face has a second included angle between 8° and 17° with respect to said reference horizontal level. When an incident light beam injects downwardly on said micro-structured portion in a predetermined incident angle range, a predetermined percentage of said incident light beam emit an emissive light beam projected out in an included angle range between 0° and 90° with respect to said reference horizontal level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.