RGB LED 3 Color LED - 5050 SMD LED

Both RGB LED (RGBW LED, 5mm RGB LED, 8mm RGB LED or 5050 RGB LED ect.) and white LED (White SMD LED or Whtie Through-hole LED) are actually intended to achieve white light, but one is directly white light (phosphor) and the other is mixed with red, green and blue.

Imaging principle of RGB lamps: RGB lamps are integrated with three primary colors. In addition, there are blue LEDs with yellow phosphors, and UV LEDs with RGB phosphors. Overall, both have their imaging principles, but the attenuation problem and The effect of ultraviolet light on the human body is a problem that is difficult to solve in the short term. Therefore, although the demand for white light can be achieved, there are different results.

RGB is obviously more diverse than white LEDs. For example, such as car lights, traffic signs, shop windows, etc., when you need to use a certain band of lights, RGB color mixing can be arbitrary, in contrast, white LED It is more disadvantageous, so of course it is stronger in effect. On the other hand, if it is used in lighting, RGB LED lights will be more disadvantageous, because it is mainly used to see the luminous flux, life and solid color of white light. At present, RGB LED lights are mainly used in decorative lights. aspect.

From seeing the bright future of white LEDs using phosphors, Lin Zhuxuan, the general manager of the US light source, who has already announced the abandonment of this line, said that not only is the problem of light attenuation, but other problems are also a major cause. He clearly stated that white LEDs are obviously inferior to RGB in terms of sharpness and color purity. He also said that the overall brightness and sharpness of RGB is five times that of phosphor white LEDs when the RGB overlaps. In addition, the problem of light attenuation, expensive wafers, is also a major reason for his optimistic RGB lights.

People who like high quality should find it easy to find that the color of some LED backlights is particularly clear and bright, and even has a high-definition TV. In this case, it is the characteristic of RGB. The red is red and green. It is the characteristic of green, blue or blue. In the color mixture of light, it has more characteristics. Just like the painter's palette, it will make the most realistic color world perfect and make a beautiful life.

The problem of control of RGB lamps still needs to be strengthened. For example, if one of the lights is broken, it will be quite obvious on the whole screen. On the contrary, the white LED lights can complement each other, because it is a side-by-side relationship, so it can complement each other. A broken LED, and the uniformity of the complement, so that the overall situation does not look too bad.

When three LEDs are respectively illuminated by three primary color LEDs, it can emit yellow, purple, and cyan (such as red and blue LEDs emit purple light when illuminated); if red, green, and blue LEDs are lit at the same time It produces white light. If there is a circuit that enables the red, green, and blue LEDs to be lit separately, separately, and the three primary LEDs are lit at the same time, then he can emit seven different colors of light, so the colorful LED lights appear. a phenomenon.

The color changing lamp is composed of red (R), green (G), and blue (B) three primary color LEDs. Two-color LEDs are very familiar to us. Generally composed of red LEDs and green LEDs. It can emit red or green light alone. If the red and green lights are bright at the same time, the red and green lights are mixed into an orange color.

Color is a property of light, and there is no color without light. Under the illumination of light, people perceive the color of various objects through the eyes. These colors are the combined effects of the characteristics of the human eye and the objective characteristics of the object. Color TV technology transmits and receives color images according to the visual characteristics of the human eye. Under the illumination of the sun, people can see colorful natural scenery. It is known from the optical theory of physics that light is a substance in the form of an electromagnetic wave. Any electromagnetic wave that causes a visual response of the human eye is called visible light, and it is an electromagnetic wave with a wavelength between 380 and 780 nm.

The human eye not only recognizes the brightness of the color light, but also recognizes the color of the light when the intensity of the colored light is sufficient. For colored light, three physical quantities of brightness, hue, and color saturation can be used. In a color television set, the so-called transmission of a color image is essentially the brightness and chromaticity of the transmitted image. Monochromatic light of different wavelengths will cause different color sensations, but the same color sensation can be derived from a combination of different spectral components. When people experimented with color mixing, they found that almost all kinds of colors appearing in nature can be obtained by mixing three kinds of monochromatic lights in different proportions. Three monochromatic lights with this characteristic are called primary colors, and these three colors are called three primary colors.

The three primary colors used in color televisions are red, green, and blue. The main reason is that the human eye is most sensitive to the light of these three colors, and the combination of red, green and blue colors can be matched with more colors. The principle of three primary colors is an important principle for decomposing and mixing colors. This principle lays the foundation for color TV technology and greatly simplifies the technical problem of transmitting color using electrical signals.

According to the principle of three primary colors, we only need to decompose the various colors to be transmitted into three primary colors of red, green and blue, and then convert them into three electrical signals for transmission. At the receiving end, the three color signals can be red, green, and blue, respectively, to reproduce the original color image. Now we use the color TV, go closer to the screen, you will find that the color image is composed of a lot of red, green and blue three points, which is the use of the human eye space details of the difference in resolution, the three primary colors of light are projected on the same surface On the three red, green and blue phosphors, because of the small dot pitch, the human eye will produce a color sensation after mixing the three primary colors. This is the spatial additive color mixing method.

In the physics class of middle school, we may have experimented with prisms. After passing through the prism, white light is decomposed into a variety of color gradually transitioning chromatograms. The colors are red, orange, yellow, green, cyan, blue, and purple. This is the visible spectrum. . The human eye is most sensitive to red, green and blue. The human eye is like a three-color receiver system. Most of the colors can be synthesized in different proportions by red, green and blue. Similarly, most of the monochromatic light can be decomposed into red, green and blue. This is the most basic principle of colorimetry, namely the principle of three primary colors. The three primary colors are independent of each other, and no one of the two primary colors can be combined with the other two colors. Red, green and blue are the three primary colors, and these three colors have the widest range of colors. The red, green and blue primary colors are added in different proportions to form a mixed color called additive color mixing.

This program is used to control the RGB three primary color LEDs so that the gradation time of each color is 9.3ms in the order of red, green, blue, purple, yellow, cyan and white.