I'm not sure these are real life numbers...and they'll hold. A lot of consumers have their sets on longer than 6.5 hours... e.g. the children wake up early, 6-7 am and hit the early morning cartoons... (parents allow this.. so they can get a few more minutes of shut-eye), 10-11am could be cut off if the soaps and game shows didn't come in... older kids get home from school early... and the set gets further usage. Then the evening and prime time hits... who has their set off? Late show et on.
Given this scene.. You could be looking at 16-18 hours a day, not to mention the panel used as a computer display. Putting the time down to 12-14 years and at half brightness, at which point other issues in the display may have made viewing no longer cutting edge.
Sure this is a heavy exaggeration, but with so many of these displays being used in public areas 24/7 we'll see deterioration in as low as 6-8 years. I suspect the real reason for touting these figures is to justify the very high retail prices and convince the buying market that their dollars are buying longevity.
Look at the MTBF for hard drives, which have become meaningless.
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