Cholesteric liquid crystal optical bodies and methods of manufacture and use
US7298442B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2005 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Feb 24, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133543
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An optical body includes a) first particles comprising a first cholesteric liquid crystal material and b) a second cholesteric liquid crystal material. The first particles and the second cholesteric liquid crystal material form a structure where the first cholesteric liquid crystal material has a pitch that is different than the second cholesteric liquid crystal material. In one example, the second cholesteric liquid crystal material is in the form of second particles. In another example, the first particles are dispersed in a matrix of the second cholesteric liquid crystal material. In other examples, the optical body has more than one layer. In addition, one or more additional cholesteric liquid crystal materials can be used in the optical body. These optical bodies can be used as a reflective polarizer and can be used in a display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.