What does dynamic contrast mean about LCD TVs?

Dynamic contrast refers to the contrast value measured by LCD TV in some specific situations, such as testing each area of the screen one by one, and taking the contrast value of the area with the largest contrast as the contrast parameter of the product. Dynamic contrast measurements may vary from manufacturer to manufacturer.

The value of dynamic contrast is not as meaningless as some people say,It also has its own meaning,High dynamic contrast also means better screen performance,But it and contrast are two completely different concepts,Can not be confused,Let alone compare with each other:Generally, the same TV is too contrasting to be 3-5 times the contrast。

Here is just a brief introduction to the meaning of the contrast of LCD TV,When choosing an LCD TV, it is not only necessary to look at the contrast of such an index, but to weigh and consider a variety of factors,The best way to choose is"Look"! The TV itself is used to watch - to observe the actual performance of the TV, without superstition of all kinds of simple indicators, good and bad, a pair of fiery eyes on the full screen to judge.

The higher the better, which means that 5000:1 is the strongest.

It's good to have a large number! However, the average domestic TV does not meet the standard they say! The domestic Hisense and the joint venture can be achieved by sending Hitachi!!

Dynamic contrast is to put it bluntly, when a running picture appears, the high dynamic contrast can fully display that picture, that is, you can see the folds of the clothes when you are exercising.

The one with low contrast doesn't see very well or barely at all.

That's what it means, I'm speaking in the vernacular.

Dynamic contrast.

This parameter is identified on the LCD display from 08 onwards.

on. In just two years, the dynamic contrast ratio has grown from 1000:1 when it first appeared to 3000:

1. Know that today's millions, tens of millions to one. x0dSo, what exactly is dynamic contrast? Why is dynamic contrast developing so fast?

How does dynamic contrast help to improve the effect of liquid crystal display? The author will answer these questions for you in the following article. In order to better explain dynamic contrast, it is necessary to first explain the definition of contrast.

To put it simply, contrast ratio is the brightness ratio of the black and white display screen of an LCD display. The larger the ratio, the more gradation from black to white, and thus the richer the color expression, which is where contrast comes in for the display effect. As it stands, there are three common ways to test contrast, corresponding to three contrast identifiers, which are:

Full On, Full Off Contrast, ANSI Contrast, Dynamic Contrast. Full on, full off, contrast; The ratio of the brightness displayed when the display receives an all-white signal to the brightness of the all-black signal display, which is also called the maximum contrast ratio, and is also used by professional testers to use the term on-off ratio. Before the dynamic contrast came out, manufacturers often preferred to use this test method with the largest value of the stool or stool.

TV contrast,It refers to whether TV can reflect rich color scale parameters,The higher the TV contrast,The better the picture hierarchy presented to the audience,The clearer the image,The richer the erotic presentation。 On the contrary, the lower the TV contrast pair, the worse the picture texture and the blurrier the image.

Television is a kind of household appliances, is the use of electronic technology to transmit the image picture and audio signal of the activity, the first television was introduced in 1925, the inventor is John Logie Baird.

The main TV broadcasting standards used in the world are PAL, NTSC, SECAM, and the standard used by Chinese TV programs is the PAL system.

TV is a household appliance, if the TV catches fire, there is no power failure money, can not be directly destroyed with water, there will be a risk of electric shock.

Operating environment

Brand model: general

System version: General

LCD TV contrast (contrast) is defined as: the ratio of the brightest (white) and darkest (black) brightness at the same point, high contrast means relatively high brightness and the brightness of the color. Contrast is the weakness of LCD display technology,The backlight of LCD TV is continuously emitted,And the LCD panel cannot completely block the light,Therefore, it is very difficult to achieve a completely black picture,This will inevitably affect the richness of the display color level。 Contrast is a parameter that directly reflects whether the LCD TV can reflect the rich color gradation,The higher the contrast,The better the layering of the restored picture,The sharper the image,The clearer the image。 If the contrast is not enough, the picture will appear dull and lack expressiveness.

For LCD TVs,The common contrast nominal value is also divided into two types: original contrast and dynamic contrast,Generally, the dynamic contrast value is 3-8 times the original contrast value。