Optical spectrum splitting for black color display
US8270066B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2010 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | May 13, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/62
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display device is provided for reflecting a black color, as enabled by an optical splitting photonic liquid crystal waveguide. Sets of top and bottom electrodes are formed in a periodic pattern. A first dielectric layer overlies the set of bottom electrodes, made from a liquid crystal (LC) material with molecules having dipoles responsive to an electric field. A plasmonic layer, including a plurality of discrete plasmonic particles, is interposed between the sets of top and bottom electrodes, and is in contact with the first dielectric layer. A voltage potential is applied between the top and bottom electrodes, generating an electric field. Dipole local orientation and non-orientation regions are created in the liquid crystal molecules in response to the electric field, and a wavelength of light outside the visible spectrum is reflected in response to optical spectrum splitting of the incident light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.