What are shutter glasses?

Some articles on glasses, shutter glasses, shutter:

Alternate-frame Sequencing - Hardware - Active Shutter 3D System Providers
... There are many sources of low-cost 3D glasses ... IO glasses are the most common glasses in this category ... XpanD 3D is a manufacturer of shutter glasses, with over 1000 cinemas currently using XpanD glasses ...
Alternate-frame Sequencing
... An active shutter 3D system (a.k.a ... An active shutter 3D system generally uses "liquid crystal shutter glasses" (also called "LCS glasses", "LCS 3D glasses", "LC shutter glasses" or "active shutter glasses") ... The glasses are controlled by a timing signal that allows the glasses to alternately darken over one eye, and then the other, in synchronization with the refresh rate of the screen ...
Active Shutter 3D System
... An active shutter 3D system (a.k.a ... An active shutter 3D system generally uses "liquid crystal shutter glasses" (also called "LCS glasses", "LCS 3D glasses", "LC shutter glasses" or "active shutter ... The glasses are controlled by a timing signal that allows the glasses to alternately darken over one eye, and then the other, in synchronization with the refresh rate of the screen ...

Famous quotes containing the words glasses and/or shutter:

    Nothing in Nature’s sober found,
    But an eternal health goes round.
    Fill up the bowl, then, fill it high,
    Fill all the glasses there—for why
    Should every creature drink but I?
    Why, man of morals, tell me why?
    Abraham Cowley (1618–1667)

    The rays which stream through the shutter will be no longer remembered when the shutter is wholly removed.
    Henry David Thoreau (1817–1862)