3D TVs, a huge step in the future

From the first 3D movie in 1922 to the successful "Avatar" production, 3D technology has evolved enormously.
3D TVs have aggressively entered the market in 2008 and revolutionized the video world. But the technology is much older: it has its roots in the 19th century!

By 1838, Sir Chrales Wheatstone invented the stereoscope. He showed that when two images are viewed stereoscopically, they fool the brain to create what appears to be a 3D image. Twenty years later, the stereoscope was improved by Louis Jules Duboscq, and a familiar image with Queen Victoria was presented to the public. It happened in 1851. After a few more years, the Cinematoscope appears, and by 1890, the British William Friese-Green comes with the first 3D movie patent. Since then, it took three decades before the first 3D movie, The Power of Love, was presented to the public in New York. It was 1922.

Today, 90 years after this revolutionary moment in film and television history, the first serious steps are taking place in this direction. 3D TVs begin to penetrate our homes. There are now several techniques for creating and rendering three-dimensional images.

Active View and Passive View

An active 3D TV costs less, but the viewer needs a pair of special glasses. On the TV screen, sequences follow quickly so that the viewer does not realize that the images are for the left eye, the right, the left, the right, and so on.

The glasses through which these images are seen work with small batteries that block the view of a particular eye at a given moment, depending on the commands they receive, through a wireless connection from the device.

The eye is thus tricked into creating three-dimensional images with the help of stimuli that reach the brain. One pair of such glasses costs almost 30 euros.

The passive 3D TV works by a special polarization filter applied to the screen and sending the image to the right lens of the glasses or to the left, depending on how the scene is shot.

The glasses used for this type of 3D TV are similar to those in the cinemas. However, passive 3D TVs cost up to 15% more than active ones. Moreover, some users complain about the uncomfortable picture of these TVs.

But the technique is evolving. The latest TVs allow three-dimensional playback without glasses.

The first 3D TVs

The first 3D LCD TV in the world is a Panasonic VT25, launched at CEATAC conference in Japan in 2008. The FHD3D technology offers 1080p clarity for both eyes and could be sold in 4 variants, from 50 inches to 65 inches, their price starting at $ 3,000.

The first 3D TV arrived in Romania comes from the Korean company LG. It was launched in 2010, under the name of LD920, around the price of 2000 €. It has a diagonal of 47 inches, and the 3D image is generated by 2 processors and a polarization filter applied to the screen. Comes with TruMotion 200 Hz technology, runs Full HD 1080p movies. However, after some time, about two hours, some of the viewers complained that their eyes were beginning to hurt.

Today's televisions are even smarter. In addition to enjoying the perfect 2D and 3D images on a high-contrast LED screen, they can play on-demand videos from the Internet and help you talk to your friends through Skype right from your couch. In addition. You can easily control functions such as turning on / off the TV, changing channels, accessing applications and surfing the web, using simple voice commands and movements.

Rooms with face recognition technology allow you to connect to Facebook, Twitter or Skype without having to enter your ID or password.

Televisions will understand what you want to see, they will better understand gestures and voices. The desktop computer will be replaced by the TV, because now both can do the same thing. Soon we will be able to read books on TV or play advanced games.

source: yoda.ro/techschool/istoria-devices-of-catodic-to-digital.
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