What are Active 3D and Passive 3D


When we talk about 3D, it usually refers to 3D glasses. 3D glasses work by providing a separate image to each eye. The brain then combines the two images into single image with 3D characteristics. The 3D process fools your brain into thinking it is seeing a 3D image, so it creates one for you. And there are two different types of 3D glasses when you view images which are displayed on a 3D TV or 3D video projector with screen. One of them is called Passive Polarized glasses, and the other is Active Shutter glasses. Normally, we abbreviate them as Active 3D and Passive 3D when they match with different TV or projectors.

Now you must be curious about what are active 3D and Passive 3D? And what is the difference between them?


As a brief introduction, Passive 3D glasses look and wear much like sunglasses and require no additional power to work. They are not only inexpensive, but also more convenient than traditional ones. In comparison to passive 3D glasses, Active 3D glasses are slightly bulkier because they have batteries, on/off button, and a transmitter that synchs the rapidly moving shutters for each eye with the onscreen display rate. And in price degree, this type of 3D glasses is more expensive


From here, you may weed out active glasses and buy a pair of passive 3D glasses as an alternative if you just need one. But if you have more requirements for image display less care about money, it’s better for you to gain an in-depth knowledge of both types including their respective advantages and disadvantages.


Disadvantages of Active 3D and Passive 3D
You may know one of the disadvantages the minute you see Active 3D glasses that is heavier and bulkier. Besides, battery power required is obvious and more expensive than Passive 3D glasses in inevitable. However, the most unacceptable fact is that Active 3D flicker due to rapid opening and closing of the LCD shutters.
Of course, nothing can be perfect, Passive 3D glasses, undoubtedly, have some shortcomings. One of the big weakness is that the3D image that is viewed by passive 3D is one-half the resolution of a 2D image displayed on the same television. The reason behind this is that both our left and right eye image are displayed on the same time. Furthermore, some horizontal lines on the screen and jaggies artifacts on the edges of objects can be noticeable, which impacts visual effect.


Advantages of Active 3D and Passive 3D
Compare to disadvantages, you may more care about their respective merits, since they present some direct reasons why you need one of them. If you want to pay for a type of Active 3D, the 3D image resolution must be put the priority for you to consider. As it is the same as the 2D image displayed on the same television. On the contrary, if you want more a type of Passive 3D instead, then you may prefer its lightweight, inexpensive and no flickering.
Everyone has his or her own preference, but one thing can be sure is that one has to choose any type based on matching the glasses to their TV or video projector.


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