With the increasing amount of 3D movies, TVs and projectors available, consumers often fail to take into account the 3D glasses element, particularly when it comes to what features to look out for.

 

So, let's breakdown exactly how 3D glasses work and the different types available to consumers.

3D glasses work by displaying different images to each eye. The brain then interprets and mergers the separate images into one, but with additional 3D characteristics. This then tricks the brain into thinking the image is in 3D, and therefore creates the sense of enhanced depth perception for the user.

3D enabled TVs and projectors work by receiving a 3D signal which then gets sent in a number of different ways. This shows the left and right eye information as one single image that gives it that blurry look when it is viewed without 3D glasses. When you use certain types of glasses, this image is separated to deliver the 3D image.

There are two main types of 3D glasses: passive polarised and active shutter.

Passive polarised glasses are the usual glasses you get when you see a 3D film at the cinema. The TV or projector uses a filter which polarises each line of pixels. This filter then makes odd lines on the screen only visible to the left eye and even lines only visible to the right eye, thus making the brain assume that the image is a 3D image.

Active shutter glasses are different in that they use batteries and transmitters, which syncs up the rapidly moving shutters on each eye with the screen display. The 3D resolution and the 2D resolution are identical, as they shown in sequence to each other rather than at the same time. The glasses then sync with the screen display, which then produces 3D images to the viewer.

ProjectorPoint offers a number of active shutter 3D glasses, including the Epson ELPGS01, the Epson ELPGS03, Panasonic, Samsung and Benq 3D glasses, which includes the batteries at affordable prices.