Varifocal structure comprising a liquid lens structure in optical series with a liquid crystal lens in a head-mounted display
US10248001B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2017 |
| Grant date | Apr 2, 2019 |
| Priority date | — |
| Expiry date | Sep 1, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/05
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A varifocal block includes liquid crystal (LC) lens and a liquid lens structure in optical series. The LC lens has a plurality of optical states, including an additive state that adds optical power to the LC lens and a subtractive state that removes optical power from the LC lens. The liquid lens structure comprises a transparent substrate layer, a deformable membrane, and a volume of liquid enclosed between the transparent substrate layer and the deformable membrane. The deformable membrane has an adjustable range of optical power dependent on an adjustable curvature of the deformable membrane. The plurality of optical states of the LC lens and the adjustable range of optical power of the liquid lens structure together provide a continuous range of optical power for the varifocal block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.