Light-modulating, electrically responsive privacy screen
US6690436B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2003 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Jan 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1334
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light-modulating, electrically responsive privacy screen includes a transparent substrate and an electrically conductive layer formed over the substrate. The privacy screen further includes a light-modulating layer disposed over the electrically conductive layer and including at least one dispersable light-modulating material and coalescence limiting material into which the dispersible light-modulating material(s) is provided so that such dispersible light-modulating material coalesces to form a set domains having at least two optical states, the first optical state being present in the absence of an electrical field and the second being caused by the application of an electrical field and wherein one of the optical states cause the light-modulating layer to be transparent and the other optical state causes the light-modulating layer to restrict a user viewing through the privacy screen and thereby provide an appropriate level of privacy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.