active 3D

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Related to active 3D: active shutter glasses, 3D TV glasses

active 3D

A stereoscopic 3D display technology that separates the stereo frames by alternating the viewing path to each eye. Used for 3D gaming and the first 3D TVs, liquid crystal (LC) shutter glasses are synchronized with alternating stereo frames on screen by an infrared (IR) emitter on the monitor or TV. Ceiling-mounted projectors use radio signals rather than IR (see RF shutter glasses).

Alternate Open and Closed
The liquid crystal lenses turn black to alternately block the light from each eye. The "active" refers to the electronic circuit in the glasses, whereas "passive" glasses have no circuits (see polarized 3D). See 3D visualization, anaglyph 3D, lenticular 3D, parallax 3D and 3D glasses.

No Flicker or Ghosting and True Colors
By supporting 120 frames per second (fps), active 3D glasses deliver the full resolution at 60 fps to both eyes. Active 3D glasses also eliminate the ghosting sometimes associated with passive polarized 3D methods, and because the frames are not modified in any manner, the viewer sees the full color spectrum. Many users claim active 3D is the best 3D experience; however, light is blocked half the time, causing the screen to be dimmer than polarized 3D. In addition, some people notice the lens flicker.

Alternate Left and Right
Every active 3D monitor and TV emits infrared (IR) signals to the shutter glasses, although starting in 2011, Samsung switched to Bluetooth. The blue arrows above are not the emitters; they show the stereo frames and alternating eyes. Active glasses are heavier and more expensive than passive polarized glasses and must be periodically recharged like all battery-operated devices.

Active 3D Gaming
Like all active 3D shutter glasses, NVIDIA's 3D Vision gaming system alternates 60 left frames with 60 right frames every second. See LC shutter glasses. (Image courtesy of NVIDIA Corporation.)

Active 3D Simulation
This CAVE system teaches people how to operate a Caterpillar bulldozer. Wearing shutter glasses, the man thinks the wheel on the left is the one he is turning. See CAVE. (Image courtesy of Fakespace Systems Inc.)
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References in periodicals archive ?
Liberty provides security solutions for concealed weapon detection in high volume foot traffic areas and has secured an exclusive license from MIT Lincoln Laboratory, as well as a technology transfer agreement, for patents related to active 3D imaging technology that are packaged into the HEXWAVE product.
This new innovation is in continuation with the many innovations that Videocon d2h has brought in DTH industry like the First to bring 1000 GB High Definition Digital Video recorder, Radio Frequency Remote for DTH, Radio Frequency Remote with Earphones & Active 3D channel
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Along with their Active 3D Cinema Solution, XPAND's Passive 3D Cinema solution was recently approved by Disney.
An active 3D beam forming small cell comprises several antenna elements and transceivers arranged in a matrix which enables completely flexible vertical and horizontal beamforming, including beam shaping independent in the downlink (DL) and uplink (UL).
In total, Sharp is offering 11 new televisions with active 3D - that's the one with battery powered glasses - which the company claims to offer twice the resolution of passive 3D; the active glasses are paired to the screen by Bluetooth to help reduce interference.
There's the added bonus of a set of active 3D glasses thrown in, with the effect working well, despite the comparatively small size 3t with t working well the s of the screen with a refreshingly small amount of crosstalk.
The cost-effect passive glasses are lightweight and hassle-free as compared to active 3D glasses.
Potential applications include shutter lenses in active 3D glasses and screen-sized polarization modulators to be placed in front of a display entailing the use of passive 3D glasses.