"dynamic" contrast ratio?

Question

im looking for a LCD hdtv. 42'-56'
i've seen lots of 15.000:1 and 10.000:1
what "dynamic" contrast ratio..should i look for the higher the better?

and some tv's i seen has 120Hz??? what is that???

thanks for the help.

Answer 1

Yes, for dynamic CR, the higher the better.
Dynamic CR = 4 to 5 times true contrast, so 10,000:1 is actually about 2,000:1 - still pretty good, but there is a lot of marketing hype in CR numbers.

120 Hz means the TV picture is refreshed twice as fast. helps with motion scenes. I would avoid it for now. Technology is still under development and very buggy...

Answer 2

In many TVs, the backlight level is reduced when the screen goes dark all over, so that the picture looks blacker. But when the picture has both light and dark parts, that doesn't work. The dynamic contrast ratio is the ratio of light to dark in one picture without any change in back light. The static contrast ratio is the ratio between a full white screen and a full black screen with backlight variation included (note: this is a simplified explanation, and is not exactly correct for may sets, since even dynamic contrast is often measured with full-screen values, except the backlight effect is not included). Some people feel that the "static" contrast ratio is deceptive, since it doesn't really reflect the contrast available in a picture. However, it does really improve the appearance of images will large dark areas and fadeouts.

120Hz frame rate has been introduced to smooth out the motion of fast moving objects, and to reduce the "trails" behind these objects often seen in older LCD displays. Most newer sets have it, and from what I have seen it is very effective. Essentially, an "extra" frame is inserted between each 60Hz frame, and the image in this extra frame is "interpolated" so that objects are placed between their positions on the preceding and succeeding frames.

If I were to buy an LCD TV today, I would never consider one without 120Hz frame rate, 10,000:1-15,000:1 or more "static" contrast ratio (CR), >3000:1 dynamic CR, plus the ability to accept and properly display 1080p 24Hz frame rate (at 72Hz or120Hz).

The new Sony Bravia XBR4 and XBR5 sets have these capabilities.

Answer 3

you won't be able to declare Sony makes use of static assessment ratio and Sharp makes use of dynamic. it certainly relies upon on the television exhibit style.If the exhibit is plasma, agiven static ratio will teach greater advantageous assessment to liquid crystal exhibit exhibit of the comparable assessment ratio. it is likewise difficulty-unfastened to marketplace in common terms the dynamic assessment ratio ability of a exhibit (whilst it is supported), which should not be today whilst in comparison with the static assessment ratio. A plasma exhibit with a static 5000:one million assessment ratio will teach greater advantageous assessment to an liquid crystal exhibit exhibit with 5000:one million dynamic and one thousand:one million static assessment ratio whilst the enter sign incorporates finished selection of brightnesses from 0 to one hundred% concurrently. in spite of the fact that they are going to be on par whilst enter sign levels in common terms from 0 to twenty% brightness.