Resonant modulation of varifocal liquid membrane lens to provide multiple concurrent focal planes in VR display for realistic focus cues
US10056057B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2016 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Jul 27, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A near-eye display system includes a display assembly comprising at least one display panel and a display driver to drive the display assembly to display a sequence of frames in a low-persistence mode based on a frame clock signal having a first frequency. The near-eye display system further includes a pair of liquid membrane lenses facing the display assembly, and a lens driver having an output coupled to an input of each of liquid membrane lenses of the pair, the lens driver to generate at the output a periodic, continuously variable driving signal having a second frequency, wherein the first frequency is an integer multiple of the second frequency. As the liquid membrane lenses are synchronized with the low-persistence display of the sequence of frames, each displayed frame is perceived through the liquid membrane lenses at a different nearly constant focal depth, and thus creating a perception to the user of multiple focal planes in the displayed imagery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.