Reflecting-type blue laser lighting assembly

Abstract

A reflecting-type blue laser lighting assembly relates to the technical field of lighting. The lighting assembly has a multilayer structure and includes, successively from bottom to top, a luminescentlayer, a substrate, a light beam scattering layer, and a high-reflecting aluminum plate. The luminescent layer, the substrate, the light beam scattering layer and the high-reflecting aluminum plate are tightly connected in a sintering manner. The luminescent layer is a glassy state substance containing fluorescent powder. The substrate is alumina, zinc oxide or quartz, of which the surface is coated with a film. The light beam scattering layer is a glassy state substance having micropores, which is composed of low-melting point glass powder and hollow alumina. The ratio of thicknesses of thelight beam scattering layer, the substrate and the luminescent layer is (1:10:1) - (2:5:2). The wavelength range of the blue laser is 420 to 480 nm. The surface, coated with the light beam scatteringlayer slurry, of the substrate is placed above the high-reflecting aluminum plate.

Description

Technical field [0001] The present invention relates to the field of lighting technology, in particular to a reflective blue laser lighting assembly. Background technique [0002] Lighting technology continues to move forward with the progress of society as a whole. From the initial reliance on animal and vegetable oils and fossil fuels, to incandescent lamps and gas discharge lamps (fluorescent lamps), in the 1990s, relatively energy-saving and efficient white LED lighting became popular. As the cost of laser diodes gradually decreases and their performance tends to be stable, it is becoming possible to use lasers as illumination sources. [0003] Laser illumination is divided into visible light laser illumination and infrared laser illumination. [0004] Visible laser illumination is divided into the following two types according to the principle: blue light excites fluorescent material to realize white light illumination or red, green and blue laser synthesis white laser or true...

AI Technical Summary

Problems solved by technology

However, because the laser is a straight line of light with strong directionality, the color of the light spot of the obtained device is extremely uneven, and the visual effect is still immature and needs to be improved.

[0006] What needs to be emphasized here is that no matter what kind of laser lighting technology, for example, there are two problems to face: ①. When the blue laser is irradiated on the fluorescent material, because the fluorescent material converts the blue laser light into white light complementary light (usually yellow light) The conversion efficiency is less than 100%, so a considerable part of the laser energy will be converted into heat, which will cause the temperature of the fluorescent substance to rise, and the temperature rise of the fluorescent substance will cause thermal quenching, and the luminous intensity will decrease; at the same time, it will be converted from blue light to In the case of yellow light, due to the energy difference between blue light and yellow light, that is, the Stokes shift, this part of the energy difference will also be released in the form of heat, which will also cause the temperature of the fluorescent substance to rise, resulting in thermal quenching; extreme, when blue light When the power of the laser is high enough, the number of deactivated luminescent centers in the fluorescent substance per unit time is less than the number of arriving blue light photons, and the luminous intensity of the lighting device will not increase with the power of the exciting blue light laser, that is, the so-called excitation quenching occurs question

[0009] In short, at present, in all the disclosed technical solutions, the following problems cannot be solved: the fluorescent substance used in the components for realizing blue-ray laser lighting, the part responsible for emitting light also undertakes the function of breaking up (by making micropores) the blue-ray laser, Therefore, the problems of heat dissipation, heat conduction and laser spot uniformity cannot be balanced at the same time

That is to say, all the currently disclosed technical solutions are compromised technical solutions, which can only control the micropore density as much as possible, so that the heat dissipation and thermal conductivity of the fluorescent material are not reduced to an unacceptable level when the light spot is uniform. , but this is based on the premise of reducing the overall light efficiency of the laser lighting device

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