Light regulation method of white light emitting diode

Abstract

The invention provides a light regulation method of a white light emitting diode. The method comprises the steps of: measuring spectral power of a red light-emitting diode, a yellow light-emitting diode, a blue light-emitting diode and a green light-emitting diode which independently emit light in a rated current working state; calculating the relative light mixing ratio of the red light-emittingdiode, the yellow light-emitting diode, the blue light-emitting diode and the green light-emitting diode; and according to the relative light mixing ratio, employing the control unit to output controlsignals with different duty ratios to the red light-emitting diode, the yellow light-emitting diode, the blue light-emitting diode and the green light-emitting diode, wherein the peak wavelength of the red light-emitting diode is between 670 nm and 700 nm. The white light emitting diode prepared by the method has high color rendering, low blue light hazard and the adjustable color temperature, and can be used for obtaining the white light emitting diode with the high color rendering and the low blue light hazard at any color temperature.

Description

technical field [0001] The invention relates to the technical field of light-emitting diodes, in particular to a dimming method for white light-emitting diodes. Background technique [0002] Light Emitting Diode (LED) is a component made of semiconductor material. Because it can convert electrical energy into light, it is a kind of tiny solid-state light source, which not only has the advantages of small size, long life and low driving voltage. , Fast response rate and excellent shock resistance, and can meet the design requirements of light, thin, short and small, and are widely used in various products in daily life. Among them, white light emitting diodes are very common in daily life, but the blue light hazard and color rendering of white light emitting diodes are difficult to achieve simultaneously in the existing market. According to the national standard "Photobiological Safety Standard for Lamps and Lamp Systems" (GB / T20145-2006), light with short wavelengths (about...

AI Technical Summary

Problems solved by technology

Among them, white light-emitting diodes are very common in daily life, but the blue light hazard and color rendering of white light-emitting diodes are difficult to realize simultaneously in the existing market

According to the national standard "Standards for Photobiological Safety of Lamps and Lamp Systems" (GB / T20145-2006), short-wavelength (about 410nm-480nm) light is more harmful to the human retina, among which blue light with a wavelength of 435nm-440nm The harm to the retina is the greatest, so the mainstream LED white light source technology has caused the hidden danger of blue light hazards. In addition, filtering the blue light component in the spectrum is a common method to reduce the harm of blue light, but this will affect the color reproduction of white light to blue, reducing the Color rendering of lighting white light

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