Resonant modulation of varifocal liquid membrane lens to provide multiple concurrent focal planes in VR display for realistic focus cues
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United States of America Patent
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Aug 21, 2018
Grant Date -
Oct 19, 2017
app pub date -
Apr 22, 2016
filing date -
Apr 13, 2016
priority date (Note) -
In Force
status (Latency Note)
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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.
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