Active LCD shutters for virtual and augmented reality low persistence
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United States of America Patent
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Nov 3, 2020
Grant Date -
Sep 5, 2019
app pub date -
Sep 27, 2018
filing date -
Mar 1, 2018
priority date (Note) -
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Abstract
A head-mounted display (HMD) device includes one or more active shutters coupled to a synchronization module. The synchronization module includes a first photodiode configured to detect a synchronization signal for controlling operation of the one or more active shutters. The one or more active shutters are configured to alternate between an open state to pass light and a closed state to block light for reducing a duty cycle of a display screen of a mobile device positioned within the HMD device. The synchronization signal provides a timing to block light from the display screen for a display update duration corresponding to a subset of pixels of the display screen.
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