TV Color Gamut: Is the TV color gamut value higher the better?

Popo

Member
There are many color screens that we can usually come into contact with, but their ability to display colors is not the same, and because of this, the prices of screens of the same size are also very different. There are many dimensions to evaluate the level of color display. Today, let's talk about the role of color gamut and color accuracy in TV.

Color gamut is used to evaluate the color range that a screen can display, and is often measured in percentages (such as 100% BT.709). However, there are many standards for color gamut (such as sRGB/NTSC/DCI-P3/BT.709, etc.), and the range of each standard is different, so don’t just look at the percentage, but also the standard used.

color gamut.jpg

Take the above picture as an example, you can see that different color gamut standards are like nesting dolls, one by one. The outermost "Massetry doll" is the latest BT.2020 color gamut standard, which covers a larger range of colors than previous standards.

In fact, for a long time in the past, color gamut has always been the soft underbelly of liquid crystal technology. Later, with the development of technology, many methods to improve the color gamut of liquid crystal appeared, such as quantum dots, new fluorescent red powder, etc. But these are "remedial" measures.

Color accuracy is a somewhat unfamiliar concept to the general public. However, it is easy to understand from the name. As the name suggests, the color standard refers to the difference between the color displayed on the screen and the original color of the object in the real world. That is to say, the higher the color accuracy, the better the display device can reproduce real-world colors.

color check.jpg

(The picture shows an example of the color test software interface, the color test and calculation methods are very complicated)​

The value of color accuracy is expressed by ΔE, but the smaller the number, the higher the color accuracy. We can have an intuitive understanding of it through the following description:

△E ≤ 1.5, the color accuracy is excellent, it can be considered that there is no color deviation, and it belongs to the level of professional-level display equipment;

△E is between 1.5 and 3, which is very good, and it is difficult to feel the color cast with the naked eye;

△E is between 3 and 5, excellent, enough for daily use;

△E is between 5 and 8, which is normal;

△E is more than 8, which is very poor, and the color cast can be seen at a glance.

For common liquid crystal display devices, there is not much advantage in color accuracy. Therefore, in the past many years, the TV industry did not mention this concept very much, and it was not marked until the technological progress in recent years.

In general, high color gamut and high color accuracy complement each other. If you only have high color gamut, but color accuracy is not good, it is not a good product. After all, the eternal goal of display technology is to perfectly reproduce the colors in the real world.
 

lamjs

Member
△E ≤ 1.5, the color accuracy is excellent, it can be considered that there is no color deviation, and it belongs to the level of professional-level display equipment;

△E is between 1.5 and 3, which is very good, and it is difficult to feel the color cast with the naked eye;

△E is between 3 and 5, excellent, enough for daily use;

△E is between 5 and 8, which is normal;

△E is more than 8, which is very poor, and the color cast can be seen at a glance.

Thanks!
 
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