Beam deflector, method for operating the beam deflector and eye tracking device based on the beam deflector
US12147144B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2021 |
| Grant date | Nov 19, 2024 |
| Priority date | — |
| Expiry date | Jan 26, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2225/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a beam deflector including: a first electrode layer including a plurality of electrode patterns that are arranged in a first direction; a second electrode layer provided to oppose the first electrode layer; a liquid crystal layer provided between the first electrode layer and the second electrode layer in a second direction perpendicular to the first direction, and including a plurality of liquid crystal molecules; an input channel unit including a plurality of input channels; a demultiplexer configured to divide each of the input channels into a preset number of divided channels, and connect the divided channels to the electrode patterns; and a control circuit connected to the demultiplexer, and configured to control an output signal output from the divided channels to the first electrode layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.