A Guide to Understanding How 3D Technology Works


What is 3D technology? This question can be answered through a discussion of the three types of 3D TV technology. Here are the three types of 3D TV technology:

Passive 3D Technology
The technology that has been used to make passive 3D TV resembles the technology behind cinemas’ 3D movies. Two images that are slightly different and represent each frame that is displayed by the television. A single image is shown such that it is vertically polarized, and the other horizontally polarized.
The 3D glasses meant for passive 3D TVs are similar to those for cinemas and need no power to operate. Both lenses are polarized to allow a different picture through, one vertical and one horizontal. The moment each eye views a slightly different design of the combined frame, the 3D illusion is formed.
Because passive 3D glasses need no power and have no electronics, they are cheap and easy to replace.
Active 3D Technology
Active 3D TV technology is more advanced than passive 3D TV technology. While passive 3D TV technology displays dual pictures at once each for one eye, active 3D TV technology swiftly changes the on-screen picture between one for the right eye and one for the left eye.
To form the 3D effect, wear the active 3D glasses, which include a battery power source as well as a lens consisting of a liquid crystal layer. When this liquid crystal receives power, every lens can be made opaque or transparent. So when the battery runs out, the 3D glasses don’t work.
These 3D glasses link wirelessly with the 3D TV to synchronize the changing of the lenses from transparent to dark to allow the eye to see the frame it is meant to see when it comes on-screen. This process is fast to prevent noticeable flickering while the shutters turn on and off. Because of this process, the image quality of 3D TV is higher.
Glasses-free 3D Technology
Glasses-free 3D technology is rarely available now. However, some consider it as the future of 3D TV technology due to its lack of glasses. In this case, 3D TV technology works by using parallax barrier technology. What is a parallax barrier?
A parallax barrier is a unique material on the TV screen with small slits that allow showing of one picture only to the right eye and another picture only to the left eye. These images that are a bit different are what forms the 3D effect when seen at a single time. The same technology has been used in the 3D handheld video game system of Nintendo.
While this form of 3D TV might seem perfect, it needs you to watch it at the right angle. If there are multiple viewers or off-angle viewers, the 3D TV does not work well for them. Even the smallest adjustment in the watching direction can eliminate or distort the 3D effect.

The technology is not that complicated as one might think. These three 3D TV technologies offer a view of 3D TV technology.