1,000:1 is referring to the real contrast ratio (the difference between black and white when they are displayed at the same time on the screen). The huge numbers you are used to are dynamic contrast ratios. Dynamic contrast ratios are the difference between a completely white image displayed, and then a black image displayed afterwards on the screen.
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1,000:1 is referring to the real contrast ratio (the difference between black and white when they are displayed at the same time on the screen). The huge numbers you are used to are dynamic contrast ratios. Dynamic contrast ratios are the difference between a completely white image displayed, and then a black image displayed afterwards on the screen.