How High Should Projector Contrast Be

28.04.2020 0 iCODIS Official

What does the contrast of projector mean, should it be high or low, how much is appropriate? In fact, the contrast ratio of projectors has little effect on the picture performance, so you don't need to pay special attention to the contrast value when buying projectors. However, in case you are still confused in this respect, continue reading!

What is the projector contrast
Contrast is the most important indicator of the image quality of the projection system. It describes the comparison of the brightest and darkest light output on the screen, but it is easily affected by ambient light. For example, in a good movie theater, the best contrast can be seen, while in some exhibitions, the contrast of the image will be affected due to the "scouring" of light.


Projector contrast is the ratio of black to white, that is, the gradation from black to white. The larger the ratio is, the more gradation levels from black to white are, thus the richer the color expression is. Generally speaking, the greater the contrast is, the clearer and more striking the image is, and the brighter and more gorgeous the color is. However, if the contrast is small, the whole picture will be gray.

How much contrast is appropriate for the projector
At present, the nominal contrast of most LCD projector products is around 400:1(ANSI), while the nominal contrast of most DLP projectors is above 1500:1 (all white/all black). Nowadays, many new projectors with the high contrast of tens of thousands, which are actually false numbers.


From a professional point of view, the difference between 1000:1 and 10000: 1 is basically invisible. From a non-professional point of view, the difference between 2000:1 and 3000:1 is virtually the same. Both 1000:1 and 10000: 1 are difficult to measure with instruments.


Nowadays, the original contrast of projection products is actually fixed at a level, and the difference between various products is not very large. A good projector, especially a household projector, besides maintaining the average contrast, brightness, color temperature, resolution, and grayscale are more important, and the contrast has little influence on the picture performance. So now you don't need to pay special attention to the contrast value when buying projectors.

How much contrast is appropriate for the projector
At present, the nominal contrast of most LCD projector products is around 400:1(ANSI), while the nominal contrast of most DLP projectors is above 1500:1 (all white/all black). Nowadays, many new projectors with the high contrast of tens of thousands, which are actually false numbers.


From a professional point of view, the difference between 1000:1 and 10000: 1 is basically invisible. From a non-professional point of view, the difference between 2000:1 and 3000:1 is virtually the same. Both 1000:1 and 10000: 1 are difficult to measure with instruments.


Nowadays, the original contrast of projection products is actually fixed at a level, and the difference between various products is not very large. A good projector, especially a household projector, besides maintaining the average contrast, brightness, color temperature, resolution and grayscale are more important, and the contrast has little influence on the picture performance. So now you don't need to pay special attention to the contrast value when buying projectors.

As time went by, projector contrast technology has changed and the concept of dynamic contrast has emerged. What is the dynamic contrast?


What is dynamic contrast
The concept of dynamic contrast comes from liquid crystal display technology. Its core idea is to control the light output by adjusting the backlight intensity of flat liquid crystal or adjusting the pupil size of the liquid crystal projector to achieve the effect of dynamic contrast change.

When the projector works, the product counts the brightness information of each image in real-time and determines the enlargement or reduction of the pupil based on the above statistical information. The larger the pupil is, the greater the light output and the higher the brightness is. The smaller the pupil is, the smaller the light output, and the lower the brightness is. In a dark scene, the difference between the minimum brightness and the maximum brightness of the original image is small, that is, the dynamic range of brightness is narrow. In this case, by narrowing the pupil and amplifying the original signal, not only can the light projected onto the screen be effectively controlled, but also the dynamic range of data processing can be expanded, the contrast can be improved and the dark field noise can be reduced at the same time, thus obtaining more prominent black performance.

The effect of dynamic contrast
Dynamic contrast is mainly applied to projectors (dynamic aperture control) and liquid crystal televisions to reduce the black brightness in dim scenes or increase the maximum brightness in scenes, thus improving visual enjoyment. In the high dynamic contrast mode, the film application benefits the most, and the effect of clearer black and white can make it easier for us to distinguish the detailed contrast of the film.

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