Method for generating source of white light in secondary laser mode and white light luminescence component

Abstract

The invention is a method for using the secondary laser method to generate the white light source, it uses light source which can emit out ultraviolet and purple light (wavelength is 360-420nm), such as the illuminant diode (LED) and radium (LD), excites the blue fluorescence powder to emit out the primary excited light spectrum of the wideband whose main peak is blue light, then, the primary excited light spectrum excites the yellow fluorescence powder whose stage energy is lower, the secondary excited light spectrum can be emitted out whose main peak is yellow, through adjusting the proportion of the two kinds of fluorescence powder, the primary excited light spectrum and the secondary excited light spectrum can generate the complementary effect, and generate the whole spectrum white light; additional, there also can add in the red fluorescence powder and the green fluorescence powder excited by the ultraviolet light or the purple light, in order to adjust the color and the color temperature of the white light, and it can adjust the light source of other different color.

Description

technical field [0001] The present invention relates to a method for generating white light source by means of secondary laser, in particular to a white light emitting component capable of emitting high-purity white light source, which uses a chip capable of emitting ultraviolet light or purple light with a wavelength of 360-420nm as the light source. Excite the encapsulation material coated on the chip but mixed with blue phosphor powder and yellow phosphor powder formula, and emit high-purity white light source. Background technique [0002] According to the traditional light source currently used, since there are disadvantages such as heat radiation, heavy metal pollution and high power consumption in use, based on the purpose of saving energy and meeting environmental protection conditions, it should be replaced with a new one with high energy efficiency and environmental protection conditions. Light source products. [0003] The white light source made of light-emittin...

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Problems solved by technology

[0007] In order to improve the above shortcomings, General Electric Company (General Electric Company) disclosed in the U.S. Patent No. 6,255,670 that ultraviolet LEDs are used to excite three phosphors of red, green, and blue. The three primary colors are mixed to form white light, but the light source with a wavelength of about 400nm still has poor laser efficiency for red phosphors. Therefore, the US Patent No. 6,255,670 owned by GE Corporation is not suitable for light sources with a wavelength of about 400nm.

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