Whats 50Hz vs 100Hz

dlambirl

Hi all

I'm currently in the market for a TV and I have been looking around and see everything about 50,000:1, 80,000:1 contrast... what does this mean?

Also, Whats the difference between 50hz and 100hz?

BTW I'll only be using my TV for watching Sky & playing the PS3 an odd time and watching BluRays...

Richersounds.ie: Kenny

Have a read over the following:

The contrast ratio is a measure of a display system, defined as the ratio of the luminance of the brightest color (white) to that of the darkest color (black) that the system is capable of producing. A high contrast ratio is a desired aspect of any display, but with the various methods of measurement for a system or its part, remarkably different measured values can sometimes produce similar results.
Contrast ratio ratings provided by different manufacturers of display devices are not necessarily comparable to each other due to differences in method of measurement, operation, and unstated variables. Manufacturers have traditionally favored measurement methods that isolate the device from the system, whereas other designers have more often taken the effect of the room into account. An ideal room would absorb all the light reflecting from a projection screen or emitted by a CRT, and the only light seen in the room would come from the display device. With such a room, the contrast ratio of the image would be the same as the device. Real rooms reflect some of the light back to the displayed image, lowering the contrast ratio seen in the image.
Moving from a system that displays a static motionless image to a system that displays a dynamic, changing picture slightly complicates the definition of the contrast ratio, because of the need to take into account the extra temporal dimension to the measuring process. Thus the ratio of the luminosity of the brightest and the darkest color the system is capable of producing simultaneously at any instant of time is called static contrast ratio, while the ratio of the luminosity of the brightest and the darkest color the system is capable of producing over time is called dynamic contrast ratio.

A notable recent development in the LCD technology is the so-called "dynamic contrast" (DC). When there is a need to display a dark image, the display would underpower the backlight lamp (or decrease the aperture of the projector's lens using an iris), but will proportionately amplify the transmission through the LCD panel. This gives the benefit of realizing the potential static contrast ratio of the LCD panel in dark scenes when the image is watched in a dark room. The drawback is that if a dark scene does contain small areas of superbright light, image quality may be over exposed.
The trick for the display is to determine how much of the highlights may be unnoticeably blown out in a given image under the given ambient lighting conditions.
Brightness, as it is most often used in marketing literature, refers to the emitted luminous intensity on screen measured in candela per square metre (cd/m2). The higher the number, the brighter the screen.
It is also common to market only the dynamic contrast ratio capability of a display (when it is better than its static contrast ratio), which should not be directly compared to the static contrast ratio. A plasma display with a static 5000:1 contrast ratio will show superior contrast to an LCD with 5000:1 dynamic and 1000:1 static contrast ratio when the input signal contains a full range of brightnesses from 0 to 100% simultaneously. They will, however, be on-par when input signal ranges only from 0 to 20% brightness.

Have a look at the following links for 50Hz Vs 100Hz to many opinions to list:
http://answers.yahoo.com/question/index?qid=20090822115821AAAN4hQ

http://www.boards.ie/vbulletin/showthread.php?t=50332

http://www.allsats.co.uk/index.php?topic=2028.0

I hope this is helps .

dlambirl

thats brilliant, thanks

kuro_man

Ignore the numbers, choose a budget, read the reviews (esp. hdtvtest.co.uk and avforums.co.uk) and buy the best TV you can afford.

ynam

kuro_man wrote: »

Ignore the numbers, choose a budget, read the reviews (esp. hdtvtest.co.uk and avforums.co.uk) and buy the best TV you can afford.

Agreed.

If you're on the lookout for a new television and want to know the best one that fits your budget, all you have to do is do some research by reading the reviews especially the ones coming from the experts and compare the LCD TV ratings of various brands. It's a sure thing to get the best bang for your buck. Good luck.