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- 25.10.2003
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Izgleda da toliko hvaljene Panasonicove crne, blede tokom vremena.
Bas me zanima da li ovo vazi i za ostale plazme...
Izvor: Engadget, AVS
Bas me zanima da li ovo vazi i za ostale plazme...
Over the last several months complaints that Panasonic's plasma
HDTVs experience sudden adverse changes in their black levels
after a certain number of viewing hours have been piling up in an
AVSForum thread, and now that behavior has been confirmed,
though not very well explained, in a response the company sent
to CNET today:
In order to achieve the optimal picture performance throughout the life of the set, Panasonic Viera plasma HDTVs incorporate an automatic control which adjusts an internal driving voltage at predetermined intervals of operational hours. As a result of this automatic voltage adjustment, background brightness will increase from its initial value ... The newest Viera plasma HDTVs incorporate an improved automatic control which applies the voltage adjustments in smaller increments. This results in a more gradual change in the Black Level over time.
Especially considering many buyers purchased their televisions
specifically for those deep black levels, you can see why a TV
suddenly going Sammy Sosa overnight would be upsetting. One
of the reigning theories in the thread indicated by poster &
calibrator D-Nice has been that this is by design, but a flaw
in the settings caused the large jumps (around double the
brightness, as measured by several owners light meters) instead
of a much more subtle change. So what now for owners or
potential buyers? Without more details about what is going on
and whether or not anything can be done about it, like CNET's
David Katzmeier, it's hard to see how we can continue to
recommend these HDTVs for purchase without knowing what they
will do months or years down the line. The ball is in Panasonic's
court now, a speedy response could do a lot to assuage the
concerns of current and potential owners.
Izvor: Engadget, AVS