Patent ID: 8648899
Filing Date: 2014-02-11
Classification: G02B,G02C,G02F,G09G,H04N

Abstract:
1. An apparatus for viewing projected moving images, said apparatus comprising liquid crystal glasses having dynamically switchable light transmission, said apparatus comprising a shutter having two transparent substrates and a layer of nematic liquid-crystal disposed between said two transparent substrates, and a control circuit configured to alternately apply a bias voltage and a relaxation voltage across said nematic liquid-crystal thereby causing said shutter to transition between a clear state and an opaque state, said voltage having voltage falling edges between said bias voltage and said relaxation voltage, said voltage falling edges having a duration of between 80 microseconds and 900 microseconds, said apparatus further comprising an interface for receiving a sync signal, said sync signal having a sync-signal frequency, and wherein said control circuit is configured to switch between said bias voltage and said relaxation voltage at a frequency equal to said sync-signal frequency.