RGB LED three white LED forming principle
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This article will introduce you to the synthesis of LED trichromatic light principle, RGB LED light is what? How synthetic light is produced? In fact, both the RGB LED and the white LED hope to achieve the effect of white light, except that one is presented directly with white light (phosphor) and the other one is mixed with red, green and blue light.
RGB lamp imaging principle: RGB lamp is the intersection of three primary colors common imaging, in addition, there are blue LED with yellow phosphor, and UV LED with RGB phosphor, on the whole, both have their imaging principle, but the attenuation problem UV on the human body, are more difficult to solve the problem in the short term, so although the white can meet the needs, but have different results.
RGB in the application, obviously more than the white LED to multiple, he for example, such as lights, traffic signs, windows, etc., need to use a band of light, RGB color mixing can be arbitrary, compared to white LED More disadvantageous, so of course, the effect is stronger. On the other hand, if the RGB LED lights used in lighting will be more disadvantageous, because mainly used in the lighting have to see the white light flux, life and solid color, the current RGB LED lights are mainly used in decorative lights aspect.
From seeing the future of white LEDs using phosphors not bright, Lin Zhuxuan, the general manager of Micron, which has already announced the abandonment of this line, said in particular that it is not just the problem of optical attenuation, but also other issues. He made it clear that the white LED in sharpness and color purity are significantly worse than the RGB, he said, RGB in the overlapping state is appropriate, the overall brightness and clarity is five times the white LED phosphor, In addition, the issue of light attenuation, expensive wafer costs, but also his optimistic about the RGB LED is a major reason.
Like high-quality people, it should not be difficult to find that some of the LED backlight appears particularly clear and bright colors, and even the extent of high-definition television, this situation is precisely the characteristics of RGB, red is red, green Is the green, blue is the blue features, mixed colors in the light, with more features, like the painter's palette as arbitrary, the most realistic color world perfect show, beautiful makeup life.
Controlled separately in RGB, although the direct control, mixing color is not bad, but to achieve quite pure mixed white is a big problem, although the cost is expensive, but relatively speaking, the quality is relatively good, as white LED lights, though Cost-effective, you can directly replace the CCFL LED as the main technology, but relatively speaking, because of the wavelength of the frequency of the problem and packaged together, so scattered out of the situation will be unstable.
For example, if one of the lights is broken, the entire screen will be quite noticeable. On the other hand, the white LED lights can complement each other, because they are side shooters, so they can make up A broken LED, and even the complementarity, so that the overall situation will not look too bad.
Source: Electronic Products World Forum