سلام
فیل هینتون سرپرست ادیتور وبسایت AVForums در فروم این سایت وجود مشکل در پنلهای پلاسمای بازار بریتانیا رو به نوعی مردود دونسته و اعلام کرده که بخش اعظم این مشکل در پنلهای ایالات متحده وجود داره.
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منبع:Do you have first hand experience with this issue? We have yet to see any such issues with UK sets and Panasonic has yet to confirm if it affects any of the 2009 UK models. If you watch our video with interviews from Panasonic product specialists they say there will be no issues with black levels on the 2010 models in the UK. As for the US, which is the forum you linked too, there may be issues with US sets on a handful of occasions, but these are not the same as the UK models. I have not seen any UK review sites worth their salt say any such things.
So, yes do some research, but remember there are no documented cases in the UK with measurements to back up any claims and that the US market is different to the UK. There is however a lot of speculation and rumour being put forward as fact on the internet such as posts like above, which have no basis in any fact but rather continues to spread rumour and speculation. I am not for one minute backing Panasonic or supporting them, but rather stating that until there are facts and measurements to suggest there are issues in the UK, its all speculation and should be presented as such instead of trying to say its fact.
قبلا راسموس لارسن ادمین و ادیتور وبسایت FlatpanelsHD.com هم در فروم این سایت بعد از تست پلاسمای G20 به شخصی که در مورد این مشکل سوال کرده اینطور جواب داده بود:کد:برای مشاهده محتوا ، لطفا وارد شوید یا ثبت نام کنید
سوال:
جواب داده:Anyway, there is one absolutely major aspect that need to be considered now, when it comes to Panasonic plasmas - the black levels/automatic voltage adjustment problem of the 2009 range. Obviously it's too early for any observations, but do you have any trustful information on that matter from Panasonic or any other source ?
با توجه به گفته های این دو نفر که هر دو جزو ادیتورهای حرفه ای وبسایتهای مطرح در زمینه تست HDTV ـها هستن و مدارک معتبر ISF هم دارن میشه تا حدودی از عدم وجود این مشکل در پنلهای ریجنهای خارج از ایالات متحده امیدوار شد.It seems that it's primarily a US related issue. It's true that plasma panels change in terms of light intensity over time but black levels should only be worsened a tiny bit (theoretically).
There are two aspects; one is the actual change in light output that is reduced over time (LCDs and OLEDs also loose light intensity over time).
Panasonic is trying to compensate by modifying light output based running hour intervals (all manufacturers are, including LG and Samsung). It seems that the backlight stepping is too hard on some sets. Panasonic should probably release a firmware update to fix the too steep 600 hour change. Panasonic told me that the 2010 models have a less aggressive algorithm for changing light output. I don’t know if it’s true but I noticed that the picture menu had a setting called “Panel” that changed nothing. This could be a setting for disabling the algorithm.
The second one is the change over time in phosphor. You can’t really do anything about this but it’s the same issue like on the old CRT TVs.
I have had a 2009 and a 2008 Panasonic plasma here for some time now and see no visible reduction. I also had a 2007 and a 2009 Samsung plasma. Both have been running for some time and I have noticed a minor reduction in light output but no change in black levels.
And about the G20 I haven’t found anything alarming. But I haven’t passed the 600 hour mark yet, so I can’t really say.
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