Toshiba ZL2 – Enjoy 3D Without Glasses

Posted June 4, 2012 by D.P. Ranpariya in Science & Tech Gadgets

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How Does The 3D

Toshiba has decided to throw away the glasses with the new Toshiba ZL2 – Enjoy 3D Without Glasses, the first television for the home market that allows 3D without having to use something extra on the tip of the nose.

The human brain can extrapolate the three dimensions of an object (height, width and depth) from two-dimensional images by positioning the eyes in the skull that do get two slightly different images to the brain allowing him to perceive the volume and distance of objects that are to do (which is why a person who sees evil, or is blind in one eye, has difficulty in judging the distance that an object is, greatly increasing the difficulty, for example, driving a car).

The 3D visualization systems for film and TV work in much the same way. Are simultaneously shot in two planes of the same object at slightly different angles which are then encoded images that are offset from one another, but are shown so quickly that appear to be overlapping.

Already there are TVs that can do the conversion from 2D to 3D in real time. This is achieved through very powerful image processors in combination with software that makes the image analysis in order to know which area of the picture “sends back” and what it shows. The problem with these systems is that they can easily be “fooled” by error or sign of poor quality, or even the amount of static objects.

The modern 3D television is available in several flavors: active 3D glasses, 3D with passive glasses and now with the Toshiba ZL2 console and the Nintendo 3DS 3D without glasses.

The first method uses a pair of glasses that have lenses that are actually small LCD screens. Through a signal sent by the TV, the glasses synchronize with the two image fields that are assigned to each eye. Where is the field to be displayed to the left eye, the right is hidden by the LCD glasses and vice verse. It all happened so fast that you do not notice it. This system works, but it is expensive, mainly because of the glasses which also have the disadvantage of having to carry or batteries to always carry them.

The second method is similar to the first, but the two fields use a slightly different type of light that is blocked by each of the glasses. The 3D passive is cheaper and comfortable to wear, but lose in TV picture quality.

The third method, the 3D without glasses, uses the same 3D passive principle, but without the need for glasses. The 3D effect is obtained through a particular filter which is positioned in front of the screen which prevents the light of the image for the right eye to reach the left and vice verse. Until now, the major problem was the 3D goggles without there being the need for a specific location (usually the eyes must be at an angle of 90 degrees to display) to be able to view three-dimensional effect, as happens in the Nintendo 3DS.

Enjoy 3D Movies Without Glasses

The Solution Of Toshiba

In ZL2, Toshiba got a c to enable up to nine people to see 3D TV without the need for a specific position is:

Firstly a screen used 4K i.e. with the possibility of displaying images with 2x Full HD, or to 3840 x 2160 pixels, after a chamber used to detect the presence of the spectators, up to 9. Finally, the software uses the information from the camera to a column of pixels allocated to each of the viewers in order to be able to see all the 3D effects whatever viewing angle.

Despite the large screen resolution, when you are viewing images in 3D ZL2 the resolution is limited to 720P for each of the spectators.

And It works?

Well ….Yes and no…

Yes because one gets a 3D effect interesting even very different angles of 90 degrees required in other solutions of this kind.

No, because the detection system of the spectators is not dynamic, which means that if you leave the place to go get the popcorn, sit back or when exactly the same place or will have to adjust the system again. To help, the TV shows you a screen marker that serves to find the ideal position to enjoy the 3D effect. Another thing, the 3D system does not like fluorescent light bulbs because, as the screens, the lights flicker and also have a frequency roughly equal to the screen which can cancel the 3D effect.


  • Screen 55 “QUAD-HD (3840 x 2160)
  • 3D without glasses
  • Board for detecting viewers
  • Conversion from 2D to 3D
  • Contrast Ratio 9000000:1
  • Wi-Fi
  • DLNA
  • Free view and analogue tuner
  • Ambient light sensor
  • Subwoofer
  • Recording to USB hard drive
  • 4x HDMI
  • 2x USB

And is there life beyond 3D?

Yes! Definitely! The 55-inch 4K display is simply fantastic! The image processor can do up scaling to HD content and 4K results are very good. My only regret failing to find anything in 4K resolution native …
Still, the results are impressive!

This ZL2 offers Internet access and the ability to install apps to access various services, the problem is that many of them do not work in our country. But obviously don’t blame on Toshiba.

The sound is good, because the space inside the box allows for resonance which does not “kill” the bass.


So Are You Ready To Buy It, To Enjoy Next Olympic games Of 2012?


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About the Author

D.P. Ranpariya

I am the man who watching dreams during the day to change trend of the world. I am desiring to set always new trends into the market.


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