okazuje się że sprawa jest poważniejsza niż tylko spadanie jakości czerni w plazmach Panasonica .
Problem może powstać z certyfikacją THX.
I also emailed THX (THXDisplays@thx.com) a couple of hours ago, documenting my black level doubling through meter readings, etc.
I have not yet heard back from THX, but am somewhat hopeful that they will:
1) demonstrate that after a 100% or 200% black level rise, Panasonic plasmas do not operate within the THX-certified specifications and;
2) request/demand that Panasonic correct their error or retract their claims to THX certification (with the fix being the more optimal outcome, of course).
For the new people just discovering this thread, this is not merely about the lightness of our black/blank screens. Contrast ratio is proportionately diminished as the black level elevates and, hence, degrades ALL visible content. For instance, if your
black levels double (lighten by 100%), your
contrast ratio is halved. This is where my set stands after only 150 hours. I would be alarmed if my post-rise screen were to be deemed THX-worthy.
For Panasonic to do nothing about this is not only bad for us discerning Panny owners, but also for THX's reputation, whose logo is stamped on these clearly defective sets. Hopefully THX will become our ally in pressuring Panasonic to make things right.
I encourage anyone who has hard data regarding their black level change to contact THX, as well. Their responses so far indicate that they are taking this matter seriously. This is one of the better ideas I have seen around here in a while. Thanks to whomever started this ball rolling.
Panasonic 11G/12G black levels have seemingly doubled over night? - AVS Forum