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bulb math

205.188.116.195

In Reply to: RE: I'm sorry... posted by Jack G on September 12, 2007 at 06:16:36

OK, plasma may have a longer life, but the flat panel big screen DLP and LCD models use basically the same bulb technology employed in a DLP or LCD projector. As a consequence I don't see average cost per hour of viewing as really any different for flat panel DLP and LCD screens than for projectors. Owners of LCD and DLP flat panel screens are probably looking at calling a service tech when the bulb goes south. Generally bulbs are user replacable on projectors and prices of replacements have come down gradually. Do manufacturers spec bulb life on LCD and DLP panels like projectors?

As I understand it many plasma panels tend to gradually lose pixels over time and once enough pixels are lost to be noticable and bothersome, the entire set is toast. There used to be a gradual but significant decline in brightness of plasma sets after 2000 hours or so, but apparently the manufacturers have upped this number to over 10,000 hours.

Follow Ups:

use current numbers (2003 - present) - Joe Murphy Jr 17:56:32 09/12/07 (0)
The numbers you are using for plasmas are from what, ten years ago? Just about every plasma in production today has a 60,000 hours to half-brightness rating. Several of the majors are now stating 100,000 hours.

Losing pixels? Either the plasma is perfect, nearly perfect (a pixel or two stuck on or off) or suffers from a serious flaw (an entire section is out). This describes close to 98% of plasmas made today.
RE: bulb math - Jack G 08:35:22 09/12/07 (0)
FWIW, the replacement bulb on my 60" SXRD cost me $250 + shipping. I'm still on my original with about 4K hrs (guesstimate). That's not an issue for me.

BTW, DLPs are not "flat panels", being neither flat nor panels-they are rear projection sets. I can't watch them due to rainbows.

Frozen/dead/stuck pixels are more of a problem when buying (return policies are critical)-I haven't talked to anyone who had a clean plasma, and then lost alot (or any) pixels during use. Last I heard, current (big brand) plasmas had a half life of about 40K-50K. New ones are *claiming* 100K.

I have nothing against FP persoanlly, especially since 1080p ones are getting cheaper. That said, their requirements do preclude their use by many people.
Jack

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