High stable enhanced colour rendering LED light source module

Abstract

The invention discloses a high stable enhanced colour rendering LED light source module, comprising a base plate and a mixed light cavity arranged at the edge of the base plate; the mixed light cavityis internally provided with a white light LED chip, a colour LED chip and a light sensor, the mixed light cavity is internally filled with a first euphotic medium, the light outlet of the mixed lightcavity is provided with a second euphotic medium, the inner wall of the mixed light cavity and the lower surface of the second euphotic medium form a multiple reflection cavity; the colour LED chip is also connected with a control circuit, the light sensor can detect white light luminous flux in the mixed light cavity, and the control circuit can regulate luminous flux of the colour LED chip according to the detection result of the light sensor. The module can provide high colour rendering light output while keeping lighting effect, colour temperature is extremely steady; and light can be fully mixed, and bright dipping can be uniform. The manufacture technology of the module also has great flexibility and consistency.

Description

technical field [0001] The invention relates to the technical field of LED light source modularization, and specifically discloses a highly stable enhanced color rendering LED light source module. Background technique [0002] LED is a semiconductor light emitting device. Since the appearance of high-power white light LED, because of its high luminous efficiency, good energy-saving effect, no pollution, long life and other characteristics, it is known as the fourth-generation lighting source to replace fluorescent lamps and incandescent lamps. [0003] There are three ways for white LEDs to produce white light: 1. Blue LEDs plus YAG phosphors, the blue LEDs excite the yellow YAG phosphors coated on top of them, and the yellow light generated after the phosphors are excited is complementary to the originally excited blue light And produce white light; 2. Ultraviolet light or purple light (300 ~ 400nm) LED plus RGB phosphor, its principle is similar to the light emitting prin...

AI Technical Summary

Problems solved by technology

For the former method, there is the problem of low luminous efficiency of the red phosphor, and the phosphor absorbs a lot of blue light, causing a decrease in the overall luminous flux

In addition, the consistency of batch products needs to be improved

For the latter method, since the current blue-ray chips use GaN-based materials, while red-light chips use InP-based materials, different materials cause inconsistent attenuation coefficients, and peak wavelengths will also drift. After long-term use, it is difficult to maintain high color rendering and color temperature. It is difficult to be stable, and due to the packaging of multiple chips, it is easy to cause uneven luminous color

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