Optical device and three-dimensional display device
US7336244B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2004 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Jul 25, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/341
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical device includes a transparent material layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy, at least two transparent electrodes arranged to sandwich the transparent material layer and the variable refractive index material, and a driving device supplying a voltage including driving frequencies f1 and f2 between the transparent electrodes. The difference Δ∈ in the dielectric constant of the variable refractive index material due to the anisotropy is positive at one of the driving frequencies and negative at the other driving frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.