Digamos que quando compras um carro novo também te dizem que não precisas de rodagem, que já vem feita, mas no entanto o bom senso diz para nos primeiros 1500/2000km ter cuidado, não passar de X rotações, etc.
Com os plasmas é exactamente o mesmo, e como já foi mencionado, é durante as primeiras horas que os pixeis emitem mais brilho, sendo que o mesmo vai baixando numa progressão logaritmica.
Podes não ter problemas nenhuns se não a fizeres, mas se e se, por acaso te esqueçeres de desligar o painel, ou adormeçeres, e este passar horas a fio seguidas com imagens fixas, é justamente nestas primeiras 200h/300h horas que o painel está mais sujeito a problemas de retenção ( pode-se resolver ) e burn in ( neste caso fica o painel permanentemente estragado ).
Os panasonic são muito resistentes á retenção, mas esta poderá sempre existir, tal como existia nos CRT'S.
Além do mais e se fores ao Avforums para muitos, vais ver que nas primeiras 500h/1000h os plasmas ainda estão em rodagem e só após essas 500h/1000h é que se deve fazer uma calibração profissional do painel, caso este suporte. É o que pretendo fazer ao meu logo que atinga as 500h e me decida qual o leitor HD a comprar, só assim passarei a tirar partido total do mesmo.
Uma boa leitura:
http://www.plasmasaver.com/burnin.html
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- Calibrate your display. It is difficult to overestimate the importance of this step. Most TVs come from the store with their brightness and contrast set way too high in order to show good in the display room. Get yourself AVIA or DVE (Digital Video Essentials) DVD, and you'll have a nicely calibrated set in less than 15 minutes.
- Do not watch any 4:3 or 2.35:1 content during the first 100 hours of use. Most damage is done to the brand-new plasmas by inexperienced users. Plasmas are most susceptible to burn-in during the first 100 hours, and much more burn-in resistant after 1000 hours of use.
- Restrict non-full-screen programming to 20% until 1000 hours. Plasma manufacturers also recommend limiting viewing of 4:3 or 2.35:1 programming to about 20% of overall viewing time after the first 100 hours and until 1000 hours. After that, your plasma is much less likely to take burn-in. Try watching 4:3 content in "stretched" or "fair" ("just") mode that fills the entire screen.
- While your plasma is new, turn down the contrast (sometimes called "picture", which refers to white level, or the brightness of light areas of the picture). A new plasma TV is much more likely to take damage from displaying static elements such as logos or teletext. Reducing overall contrast (this controls white levels, and is called "picture" on some displays) helps reducing the possibility of those static elements to burn in.
- Switch channels to avoid logo burn-in. Avoid extended viewing of broadcasts with non-transparent logos or where the screen is divided into fixed parts (such as teletext or weather reports) all the time. These logos or teletext lines may imprint into your plasma, causing burn-in.
- Use grey bars instead of black. Some plasma displays allow using color bars instead of black for 4:3 programming. This may greatly reduce the burn-in effect.
- Enable pixel shifting. Many plasmas offer pixel shifting, otherwise referred as "wobulation" technique, in order to reduce the effect of burn-in. Enabling this feature may decrease the effect of burn-in by "smoothing" the borders between bright and dark parts of the image. This feature alone will not prevent your display from burning in, however, because larger dark and bright parts of the screen will mostly remain where they are, thus causing an after-image with slightly blurred borders. "
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While your plasma is new:
- Reduce contrast
- Avoid content that does not fill entire screen (leaves black bars) for the first 1000 hours
- Switch channels from time to time
- If seeing any signs of image retention, run a screen saver on your plasma
Always:
- Use grey bars instead of black
- On your plasma, keep pixel shifting enabled
- On your DVD player, keep screen saver and auto-shutdown enabled
- Calibrate your display to avoid unnecessary high brightness and contrast levels "
