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September 3, 2008 4:00 PM PDT

Sony doubles smoothness with 240Hz LCD

by David Katzmaier
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The new KDL-52XBR7 will be the first HDTV with a 240Hz refresh rate.

(Credit: Sony)

Catering to those sensitive souls for whom the smoothness imparted by 120Hz LCD HDTVs is still too rough, Sony will introduce the first HDTV with a 240Hz refresh rate this December. Dubbed the KDL-52XBR7 (price TBD), this 52-inch model is the only one in the XBR7 series to boast the faster refresh rate.

According to Sony's press release, the main advantage of 240Hz compared with 120Hz is the "exceptional motion detail in movies, sports, and video games." Whereas standard 120Hz TVs in Sony's lineup interpolate an extra frame between the real frames, the 240Hz model interpolates three.

In our tests 120Hz displays like Sony's own KDL-46Z4100 do clean up some blurring in motion compared with standard LCDs, although the difference is often difficult for us to spot in normal program material as opposed to special test footage and patterns. The effect of the smoothness introduced by the accompanying "de-judder" processing, however, is anything but subtle, and can make film look more like video. We tend to prefer leaving 120Hz de-judder processing, which Sony calls Smooth Motion, turned off for film-based sources.

We expect to test a KDL-52XBR7 as soon as we can, and judge for ourselves whether the extra smoothness makes a difference.

The following product mentioned is available.

On Sale Now: $1,656.33 - $2,295.00
View the latest prices for Sony Bravia KDL-52XBR7

David Katzmaier reviews HDTVs for CNET. E-mail David or follow him on Twitter @katzmaiercnet.
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by JimOD September 6, 2008 8:00 AM PDT
So, how good is 240hz if the panel is 12ms or 8ms???
The faster the pixels go from grey to grey, the smoother the motion.

So, it seems to me that motion on a 2ms panel at 60Mhz would be smoother than that on an 8ms panel at either 120 or 240hz.

Or am I missing something here...
Reply to this comment
by whoa88 September 8, 2008 8:47 PM PDT
The Pic you guys have is of the XBR 6 40in and above
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