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What We Should Know About Display Wide Color Gamut
Sep 09, 2017

In recent years, many new standards and new technologies have emerged in the large-screen display area, one of which is wide color gamut (WCG). On the wide color gamut of the definition, technology, content, you need to know a few knowledge points, here one by one given.

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    How to determine the wide color gamut standard?

   

    The color gamut of the display is usually quantified according to the NTSC standard developed in 1953. Currently on the market most of the LCD display design can meet the HDTV color gamble standard, which is often said Rec.709 (or BT.709). Compared with the NTSC system, REC.709 color gamut covers about 72% of the NTSC color gamut. In the display ring, usually use the NTSC measurement percentage to express the display color gamut, such as "72% NTSC", which is the market's most common LCD specifications.

   

    Although there is no standard definition for wide gamut, in practice people generally see higher than 72% NTSC as wide gamut, while 72% and below are identified as non-wide gamut.

   

  

   

    Over the past few years, we have seen many types of wide gamut displays. Part can achieve 88% NTSC, 98% NTSC, or even higher. Some of these wide gamut displays can be implemented with improved backlighting technology, but there is a limit to the increase in color gamut. While newer display technologies such as OLEDs, quantum dots and LED displays can easily exceed 100% NTSC.

   

    The ultimate goal is to implement the Rec.2020 (BT.2020) color gamut, which is equivalent to about 150% NTSC. This value covers more than 3/4 of the visible color, which can be achieved in the display of unprecedented amazing colors. Is expected to accompany the development of more than ten years, Rec.2020 come true is not far away.

   

    So, must you choose a wide color gamut?

   

    The answer is: no . The vast majority of the content is recorded when it is assumed that it will use the Rec.709 color gamut standard display. And display devices with wide gamut will display these colors incorrectly, which may make the content look unnatural. Some people may prefer to see the color in a supersaturated way, but in fact this may cause the person in the picture to appear to have sunburn or some cartoon-like objects. The ability to correct the color is necessary to ensure that the content is properly displayed.

   

    LED display using wide color gamut to achieve more vivid color performance.

   

    Wide gamut content

   

    Like 4K content, wide gamut content is also very limited. The first wide spread of the wide gamut content will be Ultra High Definition (UHD) Blu-ray (Blu-ray) to Rec.2020 format. With 4K content expanded to mirror, we look forward to seeing more wide gamut content.