Optical control devices and methods of making
US8767133B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2010 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Apr 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Herein are disclosed methods by which a layer of oriented chromonic material may be transferred from a flexible substrate to a receiving substrate, so as to form a subassembly for use in the assembly of liquid crystal cells. The oriented chromonic material layer may function as an alignment layer for aligning liquid crystal material, and may also incorporate a pleochroic dye so to function as a polarizing layer. An oriented chromonic material layer of relatively large area can be transferred, which enables the production of relatively large liquid crystal cells for use in, e.g., autodarkening filters such as used for eye protection in welding operations. Curved liquid crystal cells are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.