volevo contribuire con questo link, già noto peraltro:
http://www.hdtvtest.co.uk/news/panasonic-txp42g20-txp42g20b-20100308169.htm
nello specifico si dice:
A number of USA owners of Panasonic’s 2009 plasma models have reported a sudden rise in black level on their plasma TVs after 1000 to 1500 hours of use. In an email response to CNet USA’s queries, Panasonic USA confirmed that the black level on their 2009 plasmas can brighten over time as a result of automatic internal voltage adjustments which kick in at set intervals to maintain optimal picture performance throughout the life of the TVs.
Panasonic USA went on to state that the newest (2010) Viera plasmas will incorporate an improved algorithm to apply the voltage adjustments in smaller increments so that any change in black level over time is going to be more subtle.
Should you be concerned when buying a 2010 Panasonic plasma television? Our opinion is “no” for the following reasons:
While there exists a handful of subjective anecdotal reports, at this time of writing there is no concrete evidence showing that European and British sets are similarly affected by this loss in black-level performance; and
Measurements on a couple of American 2009 samples suggest a threefold rise in black level after 1500 hours of use. Assuming that the black level on the Panasonic TX-P42G20 will increase by the same factor, it’s still going to be a respectable 0.06 cd/m2 which is generally adequate to produce deep blacks.
Esperienza personale sul mio V10, dopo sei mesi si vede meglio di prima.
http://www.hdtvtest.co.uk/news/panasonic-txp42g20-txp42g20b-20100308169.htm
nello specifico si dice:
A number of USA owners of Panasonic’s 2009 plasma models have reported a sudden rise in black level on their plasma TVs after 1000 to 1500 hours of use. In an email response to CNet USA’s queries, Panasonic USA confirmed that the black level on their 2009 plasmas can brighten over time as a result of automatic internal voltage adjustments which kick in at set intervals to maintain optimal picture performance throughout the life of the TVs.
Panasonic USA went on to state that the newest (2010) Viera plasmas will incorporate an improved algorithm to apply the voltage adjustments in smaller increments so that any change in black level over time is going to be more subtle.
Should you be concerned when buying a 2010 Panasonic plasma television? Our opinion is “no” for the following reasons:
While there exists a handful of subjective anecdotal reports, at this time of writing there is no concrete evidence showing that European and British sets are similarly affected by this loss in black-level performance; and
Measurements on a couple of American 2009 samples suggest a threefold rise in black level after 1500 hours of use. Assuming that the black level on the Panasonic TX-P42G20 will increase by the same factor, it’s still going to be a respectable 0.06 cd/m2 which is generally adequate to produce deep blacks.
Esperienza personale sul mio V10, dopo sei mesi si vede meglio di prima.