What determines the color of the projection image?

For traditional projectors, in addition to considering brightness and contrast, people pay more attention to the color performance of the image. In the field of home projectors, color performance is often one of the important criteria for consumers to consider whether a product is good or bad, such as whether it meets ISF and THX certification. So what determines the color performance of the projector?

The main factor determining the color performance of the projector is the light source of the projector. Traditional home projectors usually use a light bulb source that is not pure because the ultra-high pressure mercury lamp has a lot of messy light that is not the color required for the projected image, so when measuring the color gamut of the bulb, Performance is not as good as LED light source. Because the LED light source can emit pure red, green and blue, the color gamut effect of such a light source is even more powerful.

Traditional bulb light source

In general, the projection of the bulb light source, the measured color gamut value is about six or seventy percent, and the LED light source can reach more than 80% of the level, the difference is so much for the color effect of the picture is very obvious. If we compare the LED projector to the bulb projector, we can see that the color performance of the LED projector is better. Of course, the short-term brightness of the LED light source is not so high, so that the picture looks sometimes less transparent. If the brightness of the LED light source is the same as the brightness of the light bulb, the color advantage will be more prominent.

Laser source screen color advantage

The defect in the brightness of the LED light source is difficult to break through in the short-term technology, but with the addition of the laser light source, the color and brightness problems can be solved simultaneously. Like the LED light source, the laser has very good purity, so it also has the same color gamut advantage, and the brightness of the laser light source is not much higher than that of the LED light source, so it performs well in color transparency and does not appear. Excessive brightness affects the look and feel. In theory, the laser source is the most suitable projector source, but there are still some problems with the current laser source.

Laser source

In theory, the color of RGB laser source is the best, but because of the high cost, the application is not particularly extensive. At present, the main laser source is the form of blue laser hybrid fluorescent pink wheel. This combination can also form "white light." "But, because it is not a mixture of three colors, the gamut effect of the picture is somewhat reduced." And because the wavelength of the current blue laser is a little biased, consumers always feel that the picture is a bit purple when looking at the laser projector screen.

Laser source imaging principle

As far as the laser projection on the market is concerned, the "purple purple" problem has been improved to some extent, but it takes a certain amount of time to completely solve it. A two-color laser source has appeared on the market, and its color gamut performance has been very good. But for the ultimate effect, the three-color laser source is still the main development goal in the future.

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