Liquid-crystal varifocal lens and focal length control method
US10481429B2 · kind B2 · utility
3Cited by
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13Claims
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Key dates
| Filing date | Sep 21, 2017 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | Feb 15, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/294
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A liquid-crystal varifocal lens includes a liquid crystal lens, and an ultrasonic transducer for generating an ultrasonic wave with a frequency that matches a resonant frequency of the liquid crystal lens. The ultrasonic transducer generates flexural oscillation in the liquid crystal lens such that the flexural oscillation has a vibration intensity decreasing continuously from the center to the circumference of a liquid crystal layer, whereby the thickness of the liquid crystal layer is changed, with the result that the orientation of the liquid crystal molecules is changed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.