On Monday, January 17, 2005, at 11:33 AM, [EMAIL PROTECTED] wrote:At 12:15 AM -0800 01/17/2005, Frank P. Eigler wrote:Can anyone knowledgeable clarify the issue of longevity of LCD monitors? "I heard" (sorry) that, while they certainly look amazing, their life-cycle is (currently) substantially less than CRTs.
I heard this in connection with TVs, and wondered: 1) is that true; and 20 if so, would that also be true of computer monitors.
Google is your friend.
Ratings vs actual: There's a big variance, and it depends on your actual usage pattern - if you leave the product turned on 24/7, or only 8 hrs per day, etc. My experience has been that LCDs die earlier than their MTBF ratings and CRTs die later. YMMV.
A MTBF (mean time between failure) *rating* of 30,000 hours for an LCD's backlight is considered GREAT. 30,000 hours is only 3.4 years.
That's ONLY if it's on 24/7, and that means *on* displaying a picture.
Used 8 hours a day, 5 days a week means a lifespan of 14+ years.
Used in a typical home environment 4-5 hours a day, maybe 3-4 days a week...that's a LOT longer.
And, *that's* discounting sleep mode...
According to the info I was reading, the LCD backlight is kept on even when the monitor is dark (low-power, sleep, screen saver modes, etc). IOW, the MTBF is only extended when the monitor is physically powered-off.
Moreover, power cycling CRT's does age them much more than power cycling LCD's. And LCDs don't go out of focus as they age, the way CRTs do.
Very true!
- Dan.
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