rare as to be almost nonexistent in the US,although there was a 3-D movie trailershown during this year’s Super Bowl.
On the technology side, 3-D displayshave to present two slightly different 2-Dimages, one for the right eye and anotherfor the left. The two are then interpretedby the brain as a single 3-D image.
These distinct and separate images canbe displayed in a number of ways, but themost common for larger, shared screens isthrough the use of glasses. In one implementation, the display polarizes the images, and polarized material in the glassesensures that the proper image gets to thecorrect eye. In another, the glasses areused as shutters, synchronized with thechanging images on the display so thateach eye sees only the appropriate image.
The first approach is more demanding
of the display but easier on the glasses,
The 3-D market is at present very small,
but Colegrove thinks the technology is
Fun and games
Games are expected to go 3-D beforetelevision does for a number of reasons.One is that hard-core gamers are willing tospend money, and they tend to be earlyadopters of technology, characteristics thatmake them a potential market. Another isthe result of a decision made years ago bygame developers in response to another
Polarizing glasses and liquid crystal are pushing3-D technologies. Dynamic polarization managementpresents different images to the right and left eyes,producing one with depth [top right image]. This isdone using a modified flat panel [below right] display and could soon be the norm for gaming systemsand eventually for TV. Courtesy of iZ3D.