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Introduction Of LED Use
Apr 24, 2017

The relationship between the spectral and led white light. All week, the wavelength range of visible spectrum is 380nm~760nm, which is the seven shade of human eye-red, orange, yellow, green, cyan, blue, purple, but the light of these seven colors is one kind of monochromatic light. For example, the red light of the LED peak wavelength is 565nm. In the spectrum of visible light is not white, because white is not a single shade, but a variety of monochromatic light synthesis of composite lights, just as sunlight is composed of seven kinds of light-colored white, while the color TV in the white Light is also by the Tri-color red, green, blue synthesis. Thus, to make the LEDs emit white light, its spectral characteristics should include the entire visible spectrum range. But to make this kind of performance led, under the current technological conditions is not possible. According to the study of visible light, the white light can be seen by the human eye, at least two kinds of light mixing, i. e. Two-wavelength luminescence (blue light + yellow light) or three-wavelength luminescence (blue light + green light + red light) mode. The white light in both modes requires blue light, so the intake of blue light has become the key technology for making white, that is, the "Blu-ray technology" pursued by major led manufacturing companies. At present, the international grasp of "Blu-ray technology" manufacturers only a few, so the application of white led, especially high-brightness white led in China's promotion there is a process.

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