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drfreeman60 March 4, 2010 10:59 AM PST The blacks will not return to their pre voltage increase level.
As Panasonic has stated, at some point (Panasonic has not said exactly when), the phosphors no longer require voltage increases to fire correctly and no further voltage increases will occur. I have read several experts who after examining Panasonics patents believe the final voltage increase should happen somewhere around the 2,000 hour mark.
When the voltage increases stop, your MLL (Black Level) will remain where it is at that point for the life of the panel.
Based on David's test results and the results posted at AVS, this typically is an increase by a factor of about three.
The black levels that start out as very close to the state of the art, have turned to a shade of gray somewhere between medium and charcoal. About that of a medium price LCD set.
I have seen some people post that they believe this was planned by Panasonic to generate good reviews resulting in increased sales. While both of these conditions are true, I personally do not believe this was maliscous. My personal thoughts are this is related to energy star compliance and even more to Panasonic's advertised claim of 100,000 hour life span for the panel. I feel someone in engineering designed the voltage increases to increase panel life while maintaining good energy readings and no one ever took the time to test the long term performance.
Since Panasonic has stated that their 2010 models will experience the same voltage increase, only in smaller but more frequent stages, this leads me to believe that I should now stay away from Panasonic until at least 2011, if ever. Even with more frequent incremental increases in voltage, if the end result remains the same, an average viewer will still have a set with a less han impressive picture shortly after his initial warranty expires.
I also fear just the opposite on the lawsuit. Since these things can take years to litigate, Panasonic would only be admitting fault if they release a fix for the problem now.
I have purchased three Panasonic plasmas over the years, currently still own two. This has definitely soured me on Panasonic and their business practices.
Tests point to extent of loss in Panasonic plasma black-level performance | Crave - CNET
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If the problem with the G10 series is bothersome, consider yourself fortunate that you did not pay the premium for the privilege of owning the V10. I purchased the 50" V10 as I wanted the improved 24P playback (works as advertised). However, the problem with rising black levels is equally present in all 2008, 2009 and per Panasonics own statement, 2010 models also.
My TV was purchased August, 2009. Now has approximately 1,500 hours of use.
For my 50% greater investment than the G10 series, I have a televsion that has a gray background and will only reach a medium to dark gray (not charcoal) on any content. I would probably be content with charcoal gray. I am extremely disappointed with Panasonic as this is my third Panasonic plasma and I have advised numerous friends and family members to purchase Panasonic.
I have contacted Panasonic twice. Initial contact, I was promised that the situation would be remedied either by repair or replacement. When contacted after the cNet article was released, I was told by Panasonic, there is nothing wrong with my TV. Panasonic will not send anyone to even check it. Panasonic will not offer any remedy for a TV that is functioning as designed. Thank you for phoning Panasonic and "Have a Nice Day".
Comments on: Tests point to extent of loss in Panasonic plasma black-level performance
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Thank you Mr. Katzmaier for publicizing this issue in the mainstream media!
And thanks to all the members of the AVS forum who discovered this issue!
I own a 2008 58" Panasonic (800U). Perhaps more than most - I've noticed my black levels rise. The 58" started out with a lower black level than the 50" or other 2008 Panasonics.
After a year and a half I can see a distinct difference, WHEN I am watching movies in a blacked out room. Initially my HDTV had a stunning deep level of blacks - now - not so much.
BUT - I only "black out" the room for those rare films which I'm really looking forward to watching. In my typical viewing, I never notice the loss of blacks since the screen reflects enough of the dim lighting I typically use that this rise is not noticeable. In short, any ambient lighting, will make this rise in black levels far LESS noticeable.
Where I disagree with others is that black levels should be a primary criteria of determining picture quality. Most people don't watch television in a perfectly darkened room. Television is often viewed in a room with some lights on.
I really wish Mr. Katzmaier put more time into analyzing screen reflections and how ambient light effects blacks levels and overall performance.
Despite my criticism, I believe Mr. Katzmaier is the premiere reviewer on the internet. I only wish he would expand his tests.
He is certainly due a great deal of credit for making this problem more publicly know.
Comments on: Tests point to extent of loss in Panasonic plasma black-level performance
po tłumaczeniu :
Tests point to extent of loss in Panasonic plasma black-level performance | Crave - CNET
jestem dziwnie spokojny o to, że jak go skalibruje będzie lepiej niz u kikiego
