Light source structure for improving light conversion efficiency by fluorescent powder

Abstract

The invention relates to a light source structure based on fluorescent powder improving light conversion efficiency. The light source structure comprises a trigger light source (1), a triggered material (3) and a heat conducting substrate (4); the triggered material (3) is tightly attached to the heat conducting substrate (4); the light source structure further comprises a light split filter (2), particularly, the trigger light source (1) faces the light split filter (2), so that trigger rays obliquely radiate onto the light splitting filter (2); the triggered material (3) approximately faces the trigger rays guided by the light splitting filter (2); a heat conducting reflector is additionally arranged between the triggered material (3) and the heat conducting substrate (4) to improve the utilization rate of stimulated luminescence; and the heat conducting substrate (4) further can be fixed on a rotating disk (5) for optical mixing treatment. The invention can improve the light source efficiency and has the advantages of simple structure and low cost.

Description

technical field [0001] The present invention relates to a light source module, in particular to a light source module based on fluorescent powder excitation, especially to an improved structure of a light source that makes outgoing light purer by means of element combination. Background technique [0002] Since the early 1990s, with the rapid development of a new generation of semiconductor optoelectronic materials based on InGaAlP and InGaN, various high-power and high-brightness red, yellow, blue, green, ultraviolet and white LED light sources have emerged. , emerge in endlessly, and have been more and more widely used in various display and lighting fields. [0003] In addition to using light-emitting diodes of corresponding colors, the main technical solutions that can be used to obtain light sources of various colors (especially white light sources) are RGB light mixing and fluorescent conversion. Among them, the fluorescent conversion scheme utilizes emitted light fro...

AI Technical Summary

Problems solved by technology

Its disadvantage is that the greater the heat generated by the light-emitting chip, the greater the impact on the excitation efficiency of the phosphor

Its shortcoming is that as the light source technology continues to develop, the output brightness and power of the light source are getting higher and higher. This structure ignores the influence of the heat energy accumulated by the phosphor itself on the light conversion efficiency under high excitation light power, which limits the light source. Further improvement in light conversion efficiency

[0007] The disadvantage of the above-mentioned prior art is that although the scheme disclosed in U.S. Patent No. 7,196,354B1 can maximize the efficiency of the light source, in the structure of the light source disclosed in this patent, the unabsorbed light emitted by the fluorescent powder Excitation light can be obtained by direct radiation (such as figure 1 a) or reflection (as in figure 1 As shown in b) is emitted from the exit surface of the light source, which is not conducive to improving the purity of light output

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