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Does Plasma TV lose brightness? |
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#1 |
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Forum Member
Join Date: Oct 2012
Posts: 75
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Does Plasma TV lose brightness?
Hi Folks,
Bought the last gen Panasonic Plasma which were released in 2013 before they decided to stop selling them. Recently noticed that the set has had become dim and with pictures being washed out and lack punch. Watching the TV at daytime in cloudy days, still results in washed out picture. I've had it for just over 3 years now. The TV does not face directly my bay window but adjacent to it. The only time the TV shines is when I switch off the lights or a have tiny table lamp on, in the lounge which is not ideal. I read on the internet, where such info are not that readily available, that it goes dim after at least 8 or 9 year later with 8 hours a day use. My one is only 3 years old! Has anyone noticed their Plasma TV bought recently that has gone dim? |
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#2 |
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Forum Member
Join Date: Jun 2003
Location: Cheshire
Posts: 6,450
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Most TVs (in fact probably all) lose brightness over time. TVs with LED back-lights lose brightness. LCD TVs with cold cathode fluorescent lamps (CCFLs) do. So do OLED TVs, and plasmas too.
Whatever the light-generating device mechanism, they all lose brightness over time. A big factor in how fast that decay happens is the initial brightness or backlight setting. The higher the setting then the more rapid the wear. If your TV has been on dynamic mode for any length of time then that's like doing burnouts on your tyres. |
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#3 |
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Forum Member
Join Date: Nov 2003
Posts: 1,769
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Have you tried turning off C.A.T.S.? No, not the musical: the Contrast Auto-Tracking System that modulates screen brightness in response to the brightness of the room. If that malfunctions it may make the picture dimmer than it should be.
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#4 |
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Join Date: Oct 2003
Location: Darn Sarf
Posts: 28,726
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Well I have three Panasonic plasmas, two of them 9 years old and the other 2 or 3 years old. All of them still produce a mighty fine picture, one that even today I do not see matched by any LCD TV be they LED backlit or even 4K LCDs. They have not lost significant or noticeable brightness so in your case, I would suspect a fault but turn off all the 'enhancement' settings to be sure.
Having said that, I do not know if the situation would be any different for me if I'd had everything turned up high as some people do... vivid/bright contrasty etc., as I have always kept those settings near to or only a little above the 'normal' or mid position. And on sunny days if the sunshine gets onto the screen, it looks washed out so I just close the curtains to fix it rather than hiking the brightness and contrast. |
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#5 |
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Forum Member
Join Date: Sep 2003
Location: Sandy Heath, Beds. UK
Posts: 10,375
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I never noticed my Panasonic plasma losing brightness, and I had mine for about 6 years. I've given it to a friend and it's still going strong.
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#6 |
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Forum Member
Join Date: Oct 2012
Posts: 75
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Yes, I always turn on the Ambient sensor to ON at Datytime. I have a GT60
Now I have turned up the Contrast to 80 out of 100 to add some punch to the picture. I always have the picture at Normal, Vivid is too garish and unnatural. Plasmas always are their best at night time, that I know. Will upgrade in 2018 possibly with an OLED or whatever the best panel TV tech out there. We could even see the first introduction of QLED, a rival to OLED! |
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#7 |
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Forum Member
Join Date: Dec 2007
Location: Herefordshire
Posts: 22,789
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Quote:
Hi Folks,
Bought the last gen Panasonic Plasma which were released in 2013 before they decided to stop selling them. Recently noticed that the set has had become dim and with pictures being washed out and lack punch. Watching the TV at daytime in cloudy days, still results in washed out picture. I've had it for just over 3 years now. The TV does not face directly my bay window but adjacent to it. The only time the TV shines is when I switch off the lights or a have tiny table lamp on, in the lounge which is not ideal. I read on the internet, where such info are not that readily available, that it goes dim after at least 8 or 9 year later with 8 hours a day use. My one is only 3 years old! Has anyone noticed their Plasma TV bought recently that has gone dim? I have heard plasma TV sets can dim, but at the moment, mine is fine. |
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#8 |
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Forum Member
Join Date: Apr 2006
Location: North Derbyshire
Posts: 41,782
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Quote:
I have heard plasma TV sets can dim, but at the moment, mine is fine.
This is also the cause of screen burn when the sets are new, for the first few months the brightness drops substantially - so it's important not to subject the screen to bright (or dark) fixed images during this time. After this initial 'burn in' period is over, then the falling brightness level reduce to a low level. Likewise, on CCFL lit LCD screens, the 'wearing out' failure mode is based on lack of brightness, for the exact same reason - lowering efficiencies of the phosphors in the tubes. However, it has the advantage that greyscale stays fairly constant, as they aren't three separately generated colours. In both Plasma and LCD screens though, it's fairly rare for them to 'wear out', the panel is far more likely to fail in some way before that happens. |
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#9 |
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Join Date: May 2010
Posts: 3,087
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Quote:
how can anyone have their TV on for 8 hours a day?.
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#10 |
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Forum Member
Join Date: Nov 2007
Posts: 24,310
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My panasonic plasma is very bright and no issues after a lot of use. I have turmed off all the automatic and dynamic type picture settings though from new.
I can t say Ive noticed any running in screen dimming from new. Its as bright as its first settings which are still the same to this day. |
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#11 |
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Forum Member
Join Date: Nov 2007
Posts: 24,310
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Quote:
My Philips Plasma is still fine, nearly 9 years old now, granted i do not watch it as much as a lot of people, certainly not 8 hours a day, how can anyone have their TV on for 8 hours a day?
I have heard plasma TV sets can dim, but at the moment, mine is fine. |
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#12 |
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Forum Member
Join Date: Jan 2003
Location: Blackpool, England
Posts: 8,616
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Quote:
Bedridden or housebound people?
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#13 |
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Forum Member
Join Date: Mar 2004
Posts: 395
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No problems with my two 4-year-old Panasonic plasmas' brightnesses, though I use my 50" model a lot more than the 42" one as you might expect. I do tend to mostly watch my plasmas with the lights off and the curtains drawn though, because the screen can reflect anything white easily (e.g. the walls, bedding etc.).
As other people have said, still waiting for an affordable TV display tech that beats plasma - OLED is dropping in price and will come within the 1000 pounds range for 50"+ screens in the next few years I reckon, though it really needs someone other than LG to get into OLED TV panel mass production to force the prices down. |
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#14 |
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Forum Member
Join Date: Apr 2006
Location: North Derbyshire
Posts: 41,782
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Quote:
I can t say Ive noticed any running in screen dimming from new. Its as bright as its first settings which are still the same to this day.
![]() It certainly will have dropped in brightness - that's how Plasma works, if it hasn't then it's not 'run in' yet and you still need to be careful about screen burn. |
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