is there a difference between a contrast ratio and a dynamic contrast ratio?

Question

i am looking at buying a tv and one says 1200:1 contrast ratio, and the other sais 6000:1 dynamic contrast ratio. is there a difference or i one just similarly priced and has a huge difference?

Answer 1

yes, there is a big difference the two. Comparing dynamic and static contrast ratios is similar to one trying to compare apples and oranges. These items should never be directly compared. Some manufactures choose to market only the dynamic contrast ratio when the result is better than the display's static ratio. A display with a static contrast ratio of 10000:1 is a much better display than one with a 10000:1 dynamic and 5000:1 static contrast ratio when the input signal contains full range of brightness' from 0 to 100% simultaneously. However the displays will be equal when the input signal range is decreased to a 0 to 20% brightness level.

both of the tvs are good though.

Answer 2

Contrast ratio is defined as the ratio of whitest white over darkest black ; Best white and black on the same picture.

Dynamic contrast ratio, on LCDs, takes into account that you can change the intensity of the backlight.

So it is best white (with backlight all the way up) over best black (with backlight all the way down).
In most cases: Dynamic contrast = Contrast * K, where K is how many grade levels you can scale the backlight.
Usually K=3 to 5 depending on manufacturer.

Try to compare units based on True Contrast and NOT dynamic contrast

Answer 3

the theory: a more advantageous positive television can make a million pixel completely black and the subsequent pixel completely white. the reality is not any television can extremely attempt this so that they degree the adaptation and are available up with numbers like 800:a million or 1500:a million. some televisions had extremely undesirable numbers so the promoting and marketing departments got here up with a sleazy version called "dynamic assessment ratio". each and every agency might want to then arise with a technique that made their televisions have more advantageous numbers. Now you discover televisions with 10000:a million dynamic assessment ratios - yet each and every agency makes use of a distinct thanks to degree this. you are able to no-longer use assessment ratio to evaluate televisions.