Your browser is not Javascript enable or you have turn it off. We recommend you to activate for better security reason<div class="billede"><img src="pictures/mini-toshibazl2.jpg" alt="Toshiba ZL2 3DTV"></div>Toshiba explains glasses-free 3DTV technology - FlatpanelsHD

<div class="billede"><img src="pictures/mini-toshibazl2.jpg" alt="Toshiba ZL2 3DTV"></div>Toshiba explains glasses-free 3DTV technology

07 Oct 2011 | Rasmus Larsen |

At IFA Toshiba introduced the <a href=http://www.flatpanelshd.com/news.php?subaction=showfull&id=1315310380 target=_blank><b>ZL2</b></a> TV with glasses-free 3D and a 4K panel. At the CEATEC 2011 fair Toshiba has shed some light on the technology utilized inside the TV. FlatpanelsHD takes a look at Toshiba’s 3D technology in this article.<br /><br /><h3>Toshiba explains glasses-free 3D technology</h3>Toshiba’s glasses-free 3DTV called 55ZL2 will be available in Europe in December. A slightly different variant called 55X3 will be available in Asia in December, too. So, let us take a look at the technology inside.<br /><br /><p align=center><a id="thumb" href="pictures/toshibazl2-1l.jpg" class="highslide" rel="highslide"><img class="imgresponsive" src="pictures/toshibazl2-1.jpg" alt="Toshiba’s glasses-free 55-inch 3DTV - 55ZL" title="Click to enlarge" /></a><br><i>Toshiba’s glasses-free 55-inch 3DTV - 55ZL2</i></p><br />The TV is based on a so-called 4K LCD panel, meaning that it holds a resolution of 3840x2160 pixels. The high resolution is required because the glasses-free 3D system reduces actual 3D resolution. In order to compensate Toshiba has increased the resolution compared to typical Full HD 3DTVs with glasses. The 3D resolution is 1280x720 pixels.<br /><br />The autostereoscopic 3D capabilities are based on a lenticular lenses 3D technology that allows Toshiba to show two different images; one for each eye. In other words; light is refracted into two different angles. Typically this technology allow a user to watch 3D from only 1 angle but by incorporating more parallaxes, Toshiba now supports up to nine parallaxes, which equals seven 3D viewing angles. On top of that Toshiba has added a face-tracking camera that adjusts the 3D viewing angles based on the viewers’ positions.<br /><br />Toshiba has also overcome another challenge with glasses-free 3D. Typically glasses-free 3DTV only support 3D and no 2D but Toshiba has added a “polarization switching sheet” between the lenticular lenses and the LCD panel. This technology allows Toshiba to turn on/off the lenticular lenses by turning polarization of light 90 degrees, thus making 2D viewing possible.<br /><br /><p align=center><a id="thumb" href="pictures/toshiba3dtech-1l.jpg" class="highslide" rel="highslide"><img class="imgresponsive" src="pictures/toshiba3dtech-1.jpg" alt="Toshiba’s glasses-free 3DTV also shows 2D" title="Click to enlarge" /></a><br><i>Toshiba’s glasses-free 3DTV also shows 2D</i></p><br />The 4K LCD panel is developed in collaboration with another panel maker, Toshiba says (most probably Sharp). The LCD panel has a direct LED backlight with local dimming in 12x20 = 240 zones. The 4K resolution and scaling is handled with two of Toshiba’s own CEVO chips that also take care of 2D-to-3D conversion. Normal 2D content is typically scaled to 1920x1080 pixels and afterwards scaled up in factor 2 (1920x2=3840, 1080x2=2160).<br /><br /><p align=center><a id="thumb" href="pictures/toshiba3dtech-2l.jpg" class="highslide" rel="highslide"><img class="imgresponsive" src="pictures/toshiba3dtech-2.jpg" alt="Toshiba’s glasses-free 3DTV uses a CEVO engine chip" title="Click to enlarge" /></a><br><i>Toshiba’s glasses-free 3DTV uses a CEVO engine chip</i></p><br />Toshiba’s glasses-free 3DTV will be available in December 2011 in Europe called ZL2 and in Asia called X3.<br /><br />- <i>Source: Toshiba / Nikkei</i>



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