Light redirecting films and film systems
US6752505B2 · kind B2 · utility
233Cited by
17References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2001 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Aug 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2221/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Light redirecting films include a pattern of individual optical elements of well defined shape on the light exit surface of the films for refracting the light entering the entrance surface of the films from a backlight toward a direction normal to the exit surface. The individual optical elements overlap and intersect each other. Also, the orientation, size and/or shape of the optical elements may be tailored to redirect more of the incident light from the backlight within a desired viewing angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.