Transmittable light-scattering sheets
US6805925B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 24, 2001 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | May 23, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24405
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A transmittable light-scattering sheet (a transmitting type light-scattering sheet) of the present invention comprises a plurality of layers, each having a bicontinuous structure composed of a plurality of polymers. The layers differ from each other in average period size of the bicontinuous structure. The sheet may comprise, for example, a first layer having a bicontinuous structure (e.g., the average period size of the bicontinuous structure of 1.5 to 4 &mgr;m) and a second layer each having a bicontinuous structure (e.g., the larger average period size of the bicontinuous structure than that of the first layer by 0.5 to 8 &mgr;m). In the sheet, the first layer may be next to the second layer. The ratio of the period size of the first layer to that of the second layer may be the first layer/the second layer=1.3/1 to 4/1. Such a sheet can impart a directionality to a reflected light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.