Variable light attentuating dichroic dye guest-host device
US6239778A · kind A · utility
95Cited by
15References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1998 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Jun 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13712
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A cell for the electronic attenuation of light suitable for use in eyewear includes spaced substrates coated with a conducting layer, and preferably a passivation layer and an alignment layer. Disposed between the substrates is a guest-host solution comprising a host material and a light-absorbing dichroic dye guest. A power circuit is provided with a power supply connected to the conducting layers. Adjustment of the power supply alters the orientation of the host material which in turn alters the orientation of the dichroic dye. Light is absorbed by the dichroic dye, depending upon its orientation without the need for polarizers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.