White-light LED light source module based on low luminance decrease and high color rendering index of purple light chip

Abstract

The invention discloses a white-light LED light source module based on low luminance decrease and high color rendering index of a purple light chip. The white-light LED light source module comprises a base plate, the purple light chip, silica gel, a rubber dam, a color transform device and the like. The color transform device comprises a basis material, composite phosphor and a coupling agent, and a purple light polarization film layer is plated on the color transform device. Physical or chemical roughing processing is performed on the surface of the base plate, the composite phosphor comprises blue phosphor, olivine phosphor and red-pink phosphor, the coupling agent is a silane coupling agent, or a titanate coupling agent or a zirconium coupling agent, and the color transform device is arranged at the top of the module and far away from the chip. The white-light LED light source module based on low luminance decrease and high color rendering index of the purple light chip is high in color rendering index and luminous efficiency and uniform in light color, purple-light spectrums can be eliminated, the using temperature of the phosphor is lowered down, and spectrum consistency and reliability during long time usage of the white-light LED light source module can be improved.

Description

technical field [0001] The invention relates to a low light attenuation and high CRI white light LED light source module based on a purple light chip, which belongs to the field of semiconductor lighting. Background technique [0002] As a new type of green light source product, LED has the characteristics of energy saving, environmental protection, long life, small size and high reliability, and its market share is increasing. [0003] At present, the mainstream implementation of white LEDs on the market is to combine yellow phosphor powder with blue chips in the form of dispensing glue, but this packaging method only uses yellow powder, the red part of the white light spectrum is missing, and the color rendering index of the light source is low. It is also difficult for the red pink color rendering index to be greater than 95. In order to solve the above problems, it has become one of the hotspots in the field of research and development in the world to use violet chips (...

AI Technical Summary

Problems solved by technology

[0006] (2) Since the phosphor is an inorganic material and the colloid is an organic material, the junction of the two interfaces cannot be completely compatible due to different physical and chemical properties, and it is easy to introduce air gaps. In this case, according to the law of total reflection, the refractive index of the phosphor 1.83, the refractive index of air is 1.0, and the colloid is 1.41-1.54. The refractive index difference between the three is large, the total reflection ratio of light increases, and the light extraction efficiency is low

[0007] (3) According to the principle of isotropic propagation of light emitted by phosphor powder, 50% of the light generated in the phosphor powder glue will be transmitted to the direction of the substrate. According to the research results of relevant literature, the traditional specular reflection type surface is easy to reflect these light rays reabsorption by chip

[0008] (4) In the spectrum of white LEDs packaged with violet chips, the violet part of the spectrum cannot be completely eliminated. The violet light transmitted from the light source is easy to cause harm to the human body due to its short wavelength and strong energy.

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