Light diffusing film and method of producing the same as well as screen
US7538942B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2005 |
| Grant date | May 26, 2009 |
| Priority date | — |
| Expiry date | Jun 5, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/602
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light diffusing film, a screen that utilizes same, and a method of producing same are provided.The light diffusing film provides a high luminance uniform over an overall area with a simple configuration and provides a good visibility. Also a method of producing the light diffusing film as well as a screen in which the light diffusing film is used are disclosed. The light diffusing film includes a base film, and a light diffusing layer formed on a principal surface of the base film and having a group of micro lenses each having a convex or concave shape which has different curvatures from each other along cross sections in a transverse direction and a vertical direction of the principal surface of the base film. The micro lenses individually have optical axes which are inclined toward the position of an assumed viewer forwardly of the light diffusing film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.