Displays and sensors integrated with multi-state cholesteric liquid crystal devices
US9046730B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2012 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Apr 26, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13718
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A sensing device may include a cholesteric crystal device including two optically transparent substrates; a liquid crystal having portions adapted for producing a plurality of optical states, said liquid crystal being arranged between the two optically transparent substrates; an optical sensor for changing optical states of respective portions of said liquid crystal to produce a range of respective optical states including all optical states produced by said liquid crystal ranging from one state to any combination of broadband reflection, tunable narrow band reflection, light scattering, and transparency in accordance with an amount of voltage applied across said cholesteric crystal device for changing optical states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.