True 3D
Imagine looking at a sculpture and being able to physically walk around or stand on a ladder and look down for a top view: Being able to move within a space using
all 3 dimensions of length, breadth and height allows us to build a 3d map of an object and see how a 3d object fills its space

The Illusion of 3D
Now imagine sitting and looking at that same sculpture from just one viewing angle while not being allowed to move your head…
Your brain receives 2 images; one from your left eye and one from your right eye, ie; it receives a stereoscopic pair of images that are then processed to pick out the relative differences between the 2 subtly different viewing angles
Objects nearby have a relatively larger difference between the 2 views compared to objects further away

3D TV and Offset Images
In order to achieve the illusion of 3D a TV must send slightly different images to our left eye compared to our right; the most popular method of achieving this, at the moment, is to trick our brains using glasses that filter the images

Anaglyphs: 3D TV using Passive Glasses
This is the simplest method and involves a pair of glasses with different coloured lenses to filter the TV image and produce a colour distorted scene
a similar passive 3d effect can also be achieved with polarised lenses

LCD Switching: 3D Using Active Glasses
The glasses use built-in liquid crystal filters synchronised with infrared sensors to monitor the television screen, as the tv picture alternates between two sets of the same image extremely quickly the lcd filters switch on and off allowing each eye to receive a slightly different image so that when an image intended for our left eye is displayed the right eye blocks the image

3D TV Without Glasses: Parallax and Autostereoscopic images
This is where TV technology starts to get interesting as the tv screen is covered with tiny directional lenses that can be constructed for a single viewing angle or multiple viewing positions or even combined with head tracking technology to monitor your viewing position and change the projected image as you move around the room
This will be discussed further in a separate article

Installing HDTV and 3DTV in Homes and Entertainment Centres
To find out more about wall mounting or ceiling mounting a new TV in the Gateshead area visit:Installing HDTV and 3DTV Gateshead and ask for a price quote