- BEST 3D GLASSES FOR SAMSUNG PLASMA DRIVER
- BEST 3D GLASSES FOR SAMSUNG PLASMA TV
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So looking at that, as an LCD manufacturer, how do you adjust your crosstalk compensation to so many variables.
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"If you think, with an LCD now you have a warm up time of between 60 and 90 minutes plus the panel has different temperatures wherever you look at them because in front of the power driver it's very hot and on the outside areas of an LCD there's not as much temperature. By temporarily reducing brightness in these areas, you reduce crosstalk and make what remains as well hidden as possible.īut Wagenseil says that even with powerful processors, LCD TVs are still riddled with crosstalk problems.
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The main picture adjustment that a TV can make to manage the crosstalk issue is to reduce brightness in the parts of the screen where crosstalk is going to occur. So there are lots of implications for LCD which makes it really hard to fight for."Īll TVs these days come packing mighty image processors, and so 3D TVs use those processors along with some complex algorithms to identify where crosstalk is likely to occur, and to adjust the picture accordingly. "And if you incline the glasses 90 per cent the closed lens actually lets in double the amount of light than the open eye. But there's a serious issue coming with that because only inclining your head by 10 to 15 degrees you already end up with 20 per cent crosstalk by default. So with that, their one advantage is that they don't lose so much brightness. "Another competitor found that it's a very good idea to put a circular polariser on the glasses and just leave the front polariser on the glasses away.
With an LCD, the glasses will shut down if you angle them to 90 degrees because the polarisation angle of the glasses is then not aligned any more with the polarisation angle that's outputted by the TV. Basically you can turn the glasses all you want and they will work in any direction. So what do you think happens when someone wearing 3D specs moves their head? "LCD is outputting polarised light while plasma outputs unpolarised light. "The final major implication is with the glasses," says Wagenseil. Wagenseil says that the glasses used with 3D LCD TVs are also responsible for creating more crosstalk than those compatible with plasma displays. "3D LCDs need a run-in time of between 60 and 90 minutes in order to achieve a reasonable quality, but with plasma you can just switch it on and it's maximum quality straight away."Īnd Panasonic doesn't believe the advantages of plasma over LCD stops there either.
"Another thing you don't have with plasma is that you have no run-in time in terms of heat," says Wagenseil. This means a cold panel cannot perform as well as a hot panel, because the liquid crystals cannot twist as quickly, which causes crosstalk issues. Wagenseil also highlighted another factor which affects crosstalk in LCD panels, which is heat.Īs an LCD TV heats up, the liquid crystals in the panel become less viscous and are thus more agile.
And from black to white is a much more crucial crosstalk because LCD produces up to 35 per cent crosstalk when the pixels are changing from black to white, while plasma has zero crosstalk in this area." "But there is a second type of crosstalk - from black into white - because an LCD always has to twist the crystals whether it needs to switch from black to white or white to black. So with that we reduce the crosstalk from white into black. To reduce that we developed a short stroke phosphor for our 3D TVs which has a decay time of only one third of that in a conventional plasma.
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"We don't say that plasma is completely crosstalk free because if you light up the plasma it needs some time to afterglow. "So we're saying that we have a response time of around 0.001 milliseconds, so basically there is no response time, you put a charge on a cell and it will light up.