An active shutter 3D system (a.k.a. alternate frame sequencing, alternate image, AI, alternating field, field sequential or eclipse method) is a technique of displaying stereoscopic 3D images. It works by openly presenting the image intended for the left eye while blocking the right eye's view, then presenting the right-eye image while blocking the left eye, and repeating this so rapidly that the interruptions do not interfere with the perceived fusion of the two images into a single 3D image.
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"). Each eye's glass contains a liquid crystal layer which has the property of becoming dark when voltage is applied, being otherwise transparent. 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. The timing synchronization to the video equipment may be achieved via a wired signal, or wirelessly by either an infrared, radio frequency, Bluetooth or optical transmitter.
Active shutter 3D systems are used to present 3D films in some theaters. It can be used to present 3D images on CRT, plasma, LCD and other types of video displays.
Read more about Active Shutter 3D System: Advantages and Disadvantages, Standards, Timeline
Famous quotes containing the words active, shutter and/or system:
“All is changed. All looks strange to me and gives me a feeling which I would rather get away from, although I know it to be the carrying out of natural laws. And I am not complaining. I am doing the same as many old people have done, I suppose, who have led an active life and suddenly find themselves living without a purpose. Oh, my heart is so full. I could write a big book on the subject of going out of this world gracefully.”
—Maria D. Brown (1827–1927)
“And there is nothing in the eye,
Shut shutter of the mineral man
Who takes the fatherless dark to bed,
The acid sky to the brain-pan;
And calls the crows to peck his head.”
—Allen Tate (1899–1979)
“While the system of holding people in hostage is as old as the oldest war, a fresher note is introduced when a tyrannic state is at war with its own subjects and may hold any citizen in hostage with no law to restrain it.”
—Vladimir Nabokov (1899–1977)