Official ZT60 Owners Thread - Page 408 - AVS Forum
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post #12211 of 12219 Old Yesterday, 12:04 PM
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Everyday I'm still wowed by this TV, even after 1,000 hours and 6 months.
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post #12212 of 12219 Old Yesterday, 12:18 PM
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Originally Posted by grilodan View Post
Everyday I'm still wowed by this TV, even after 1,000 hours and 6 months.

Me too, awesome picture quality.
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post #12213 of 12219 Old Yesterday, 01:23 PM
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Quote:
Originally Posted by ChadThunder View Post
I won't speak for ZT60 owners but on my PF30's the only time I use black extender is

1) watching sports with uniform green or whatever colored field and minimal shadow details, eg world cup football
2) in heavy ambient light, if the shadow details are being lost to ambient light you can afford to throw them out for a little extra boost

In casual viewing its ok, it does hurt gradations and probably should never be used with 16-235 output so use your judgment and always put it back for movies
What's a pf30?
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post #12214 of 12219 Old Yesterday, 01:36 PM
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Panasonic professional plasma 42PF30 and 50PF30

I am posting on one right now it is my main monitor and the other bigger one is for movies
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post #12215 of 12219 Old Yesterday, 02:01 PM
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Smile IR

Quote:
Originally Posted by antennahead View Post
Just a heads up hands on word of advice........ my IR didn't happen until about 1300 hours. Being well over 1000 hours with no IR, I think I got complacent thinking I was so far past break-in I was out of the woods and had nothing to worry about, especially since my Kuro never gave me a moments issue with IR. Be careful with station logos, my IR happened from only 4 or 5 hours a night of watching the Velocity channel. It's their crappy "V" channel logo that is not 100% opaque ...... the tips are a solid silver/white and that is what burned into my set. After hundreds of hours of screen wipe and pixel flipper plus a few hundred more of regular viewing, it is about 90% gone. I can still see a faint outline on light colored solid screen material. I honestly don't know if this last 10% will fade or not...... it seems to have leveled off at this point and isn't fading any more.

John
After having experienced burn-in on my VT25 that faded but never disappeared, I went through great pains to avoid a repeat performance on my ZT60. During break-in, I avoided programming with static images as much as possible. When I did watch programming with static images like my local news station, I changed the aspect ratio every 10 to 15 minutes. Still, I ended up with a station logo that still has not completely faded after four plus months. The IR occurred while I was still in the return window but there were no more ZT60s to be had. So I kept the set. I still marvel at the quality of the picture, especially with Darbee processing. I think the ZT60 rivals if not beats my Pioneer Pro 111, which is exceptionally resistant to IR BTW. Too bad that Panasonic could not conquer IR in their last, best plasma set. Oh well. I guess nothing is perfect. All in all, in spite of the IR which I try (not always successfully) to ignore, I am glad I bought the ZT60. And after about a month, I became accustomed to the fan noise.

Last edited by kennyboy2; Yesterday at 02:05 PM. Reason: Typo
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post #12216 of 12219 Old Yesterday, 02:25 PM
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^^ It seems really easy to get IR from the directv dvr navigation bar that appears near the bottom of my set when fast forwarding, pausing, reversing. Similar with some other static screen content near the bottom (TNT logo, for example). Just takes a minute or two. Turns into a garbled (somewhat colorful) white-noisy hash, visible on very light screens that stretch to the left hand side of my screen (black bars on the sides and no hash, regardless of content). But at least for now it does seem to go away after a bit, perhaps sometimes with the help of running screen wipe for a while.

(I'm not so sure about the directv logo that appears in the upper right area, it seems to be more persistent, but does not turn into a garbled hash, so I hardly ever notice whether it's even there or not. When I do look I do tend to see it, but it's very light.)
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post #12217 of 12219 Old Yesterday, 03:11 PM
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Quote:
Originally Posted by kennyboy2 View Post
After having experienced burn-in on my VT25 that faded but never disappeared, I went through great pains to avoid a repeat performance on my ZT60. During break-in, I avoided programming with static images as much as possible. When I did watch programming with static images like my local news station, I changed the aspect ratio every 10 to 15 minutes. Still, I ended up with a station logo that still has not completely faded after four plus months. The IR occurred while I was still in the return window but there were no more ZT60s to be had. So I kept the set. I still marvel at the quality of the picture, especially with Darbee processing. I think the ZT60 rivals if not beats my Pioneer Pro 111, which is exceptionally resistant to IR BTW. Too bad that Panasonic could not conquer IR in their last, best plasma set. Oh well. I guess nothing is perfect. All in all, in spite of the IR which I try (not always successfully) to ignore, I am glad I bought the ZT60. And after about a month, I became accustomed to the fan noise.
I'm still happy that I bought mine..... and a little bit unhappy with myself that I wasn't more careful about leaving it on the Velocity Channel to cause my IR. My Kuro is exceptionally resistant to IR as well .............. I think that contributed to my lax attitude after over a 1000 hours on the ZT60 with leaving it on the V channel for so many hours at a time, day after day. I now pay a lot more attention to the "type" of channel logo employed by the various stations. HGTV for example, has a TV friendly logo........ a light white/grey that is totally opaque...... has a nice transparency to it. AMC is also similar. It's the stations with colored logos or logos that have solid mass to them that I now avoid like the plague. I can get IR very quickly from static menu items for example, but those that occur that quickly also go away just as fast with a quick screen wipe. The solid channel logos retained from hours of watching day after day..... not so lucky.
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post #12218 of 12219 Old Today, 03:38 AM
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Quote:
Originally Posted by music_to_my_ear View Post
I know the ZT60 is capable of approx 30,000 shades of black. Could this feature enable the shades of gradations? THe higher the settings the more gradations?
Hi, this is a huge marketing failure, Black has no Shades, it's Black, Reference Black has RGB Triplet 16.16.16 in 8bit Video Range signal.

As we know Blu-Ray has 8-bit color depth and it's using signal in TV Legal (Video Range) (16-235) for bluray movies content.

Levels 0 and 255 are not used in image transmission... they used for other reasons.

So the image is 1-254, from these levels 1-16 are not used (are below black) and 16 is the reference black. For the 235-254 you can have image
information about these levels encoded but they are not used either in movie content.

So you have data for 16-235, this means you have 220 grayscale shades from 0% Black -100% White in 8-bit signal., 880 shades in 10bit signal, 3520 shades in 12bit signal, 14080 shades in 14bit signal, 56320 shades in 16bit signal.....but all these are grayscale shades available for the full 0-100%.

We can say that the Shadow detail exist between of about 0-5% Gray so this means that it's from 16 till 27 which is 12 shades..... if you calculate all the possible R+G+B Color Channel combinations that can be available to a 8-bit signal you get 1728 possible colors (not shades)....

For example if you want to check if your display can reproduce these shades of gray (254 levels)....load a Grayscale Ramp Pattern like the one below, and check if you can identify any of the 254 different gray bars of that ramp....if you can't identify any bar then your display can reproduce 254 different steps....if it's not smooth...that means is that you can't see 254 and can only reproduce less steps.

So no panel can't reproduce these 30.000 shades....



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post #12219 of 12219 Old Today, 04:58 AM
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Quote:
Originally Posted by antennahead View Post
I'm still happy that I bought mine..... and a little bit unhappy with myself that I wasn't more careful about leaving it on the Velocity Channel to cause my IR. My Kuro is exceptionally resistant to IR as well .............. I think that contributed to my lax attitude after over a 1000 hours on the ZT60 with leaving it on the V channel for so many hours at a time, day after day. I now pay a lot more attention to the "type" of channel logo employed by the various stations. HGTV for example, has a TV friendly logo........ a light white/grey that is totally opaque...... has a nice transparency to it. AMC is also similar. It's the stations with colored logos or logos that have solid mass to them that I now avoid like the plague. I can get IR very quickly from static menu items for example, but those that occur that quickly also go away just as fast with a quick screen wipe. The solid channel logos retained from hours of watching day after day..... not so lucky.

Hello,
Knocking on wood (literally) while writing this, it is so bizarre just how little rhyme or reason there seems to be in respect to panel to panel susceptibility to IR/Burn In.

I literally watch Velocity sometimes 8 hrs a day (very much to the chagrin of the Mrs.) and so far IR free. I am using the Xshiteity X1 as opposed to Direc FWIW.

I too was most gentle for the first 200 hours and not until the past month or two have actually just used the bloody thing. I had become so paranoid that it honestly obscured the reason for getting it in the first place.

I hope the IR subsides quickly on yours. These are such stunning displays.
Best,
AD

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