Contrast ratio is the difference between white and black on a given display. The higher the number means there is a larger difference between white and black and will typically look better. See here for a better explanation: http://en.wikipedia.org/wiki/Contrast_ratio
1500:1 is the better contrast ratio
The contrast between true black and true white on the screen. The higher the contrast ratio the better. 1000:1 is better than 700:1. An advertised dynamic contrast ration is much higher than the contrast ratio, but not a true measurement of contrast. Dynamic contrast adjusts the backlighting to give the effect of an overall brighter or darker image.
A 12,000:1 contrast ratio is good, but a 50,000:1 would be better.
Generally the higher the first number, the better.
mega contrast ratio is a brand name of technology used by a electronics company to describe the contrast ratio of the screen
The contrast ratio is a measure of how much light the projector can pump out. A high contrast ratio is especially important for daylight use.
Yes, it will make the picture much sharper.
The contrast ratio for the Dell S2309W is 1000:1.
Contrast ratio is the ability of a TV to change contrast on the set. At this point in time (and referring to HDTV's) at least 40:1 or better is probably preferred. I'm sure that'll improve as technology improves.
Contrast ratio isn't standardized, so manufacturers can fudge the numbers. Consider, however, a contrast ratio over 600.
The Higher the Better. You will see more detail in the darker part of the picture.
The contrast ratio of the ViewSonic Pj551 LCD Projector is 400:1.