Dr. Strangelove schreef op 28 March 2003 @ 20:11:
TFT is scherper dan plasma, maar de refresh rate kan nog parten spelen, hoewel dit tegenwoordig lang niet zo'n probleem meer is. Plasma heeft idd een beperkte levensduur (3000-6000 branduren),
onzin. Zowel NEC, Pioneer als Panasonic geven rond 30.000 uur halveringstijd aan (pioneer zelfs 40.000), het scherm zit dan op de helft van de fabrieks contrastwaarde (rond de 3000:1).
van avsforums:
Misconception #1: Many retailers seem to be telling consumers that plasma monitors will only last a couple of years which is false as you will see below.
So how long will a plasma last? The long and short of it is that it depends upon your daily hourly usage as well as how you use the monitor. 12 to 17 years is my short answer.
Manufacturers figures for longevity are closely guarded but I have added some here for your review:
Panasonic: States (not publicly) that the monitor is good for 20,000 to 30,000 hours. They also state that these plasma displays measure 50% brightness (phosphor ignition may be a better term) at 50,000 hours.
Fujitsu: States that the panel lasts 20,000 to 25,000 hours
Pioneer: States that the 50" PDP 502MX (or 505HD) measures half brightness (phosphor ignition) at 30,000 hours of use. They also state the newer model 503CMX (or Pro 1000HD) with a deeper pixel structure will last even longer though they do not have numbers.
Sharp: States that plasma panels only last 10,000 to 20,000 hours and that LCD monitors last longer. Figures they would say that.
For consumer use these numbers should be comforting. They are about equivalent in longevity to CRTs, which typically state 25,000 hours or so life. Let's put these hours in perspective. The average U.S. household watches 4 to 6 hours of television per day. Staggering. Taking a mean time manufacturer stated longevity of 22,500 hours of usage, times our average 5 hours per day we come up with over 12 years of usage. And that is on the low side of estimates. At 4 hours per day and 25,000 hours we are looking at 17 years.
Now, there are varying degrees of phosphor ignition along the way (the same way a CRT fades). Dissipation begins the moment you turn the set on. After 1000 hours of usage a plasma monitor should measure around 94% brightness, which is barely noticeable to the naked eye. At 15,000 to 20,000 hours the monitor should measure around 68% brightness or to say it differently, 68% of the phosphors are being ignited.
complete thread hier:
http://www.avsforumfaq.com/~plasma/#lasten gaat relatief snel inbrandverschijnselen tonen
Ook zo'n broodje aap verhaal. inbrand verschijnselen gaan pas optreden na enkele uren op hoog contrast hetzelfde beeld te laten zien. Het eerst wat je doet bij een plasma scherm is je contrast lager afstellen, vanaf de fabriek staat zo'n ding vaak in "fakkelmode", veels te hoge contrast.
Dat je soms nog beelden ziet in het scherm als je 'm uitzet is normaal en dat verdwijnt gewoon na een paar uur.
De resolutie is ook veel minder.
klopt ja, maar voor het displayen van dvd en/of TV meer dan voldoende, nieuwe generatie schermen (5 series van Panasonic bv) hebben een resolutie van 1024*768 op de 37 en 42 inch modellen.
En om verder nog aan te geven, TFT is wel grappig, maar HAALT nog steeds niet de contrastwaardes van plasma.
Groetjes,
Peschi
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Verwijderd op 11-06-2003 15:44
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