Contrast ratio is the difference between the brightest whites and the blackest blacks that a TV or video projector can display. High contrast ratios deliver whiter whites and blacker blacks and a greater degree of gray values in between. If the contrast ratio is low, even if the image is bright, your image will look washed out. However, beware of outrageous contrast ratio numbers...Read more
For additional terms and definitions, check out my Home Theater Glossary

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