Counter electrode device, system and method for varying the permittivity of a liquid crystal device
US10128571B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2016 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Aug 30, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/243
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Techniques and mechanisms for changing a permittivity of a liquid crystal (LC) cell that is to facilitate a radiating or guiding of a radio frequency electromagnetic wave. In an embodiment, a device includes electrodes coupled to variously apply different electrical fields to the LC cell at different times. At one time, a first electrical field is applied to increase an average alignment of polar LC molecules with a first axis. At another time, a second electrical field is applied to decrease the average alignment of such polar LC molecules with the first axis. The first electrical field and the second electrical field have different respective directions at a first location of the LC cell. In another embodiment, the first electrical field is applied with a first plurality of electrodes and the second electrical field is applied with a second plurality of electrodes that is different than the first plurality of electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.