High stable enhanced colour rendering LED light source module

An LED light source and color rendering technology, applied in the field of LED light source modules with enhanced color rendering, can solve the problems of decreased luminous flux, difficult to stabilize color temperature, inconsistent attenuation coefficient, etc., to eliminate ratio errors, improve color rendering index, and ensure high The effect of stability

Inactive Publication Date: 2010-02-03
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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-lig

Method used

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  • High stable enhanced colour rendering LED light source module
  • High stable enhanced colour rendering LED light source module
  • High stable enhanced colour rendering LED light source module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a highly stable red light enhanced color rendering LED light source module includes a white LED chip 1, a red LED chip 2, a light sensor 3, a temperature sensor 4, a substrate 5, a light mixing cavity 6, a first transparent The optical medium 7 and the second optically transparent medium 8 . The white LED chip 1 is a blue LED chip coated with a YAG phosphor layer.

[0027] A white LED chip 1 , a red LED chip 2 , a light sensor 3 and a temperature sensor 4 are welded on the substrate 5 at the same time. The light mixing cavity 6 is filled with a first light-transmitting medium 7 , the surface of the first light-transmitting medium 7 forms a zigzag microstructure, and the second light-transmitting medium 8 is covered thereon.

[0028] The white light emitted by the blue chip covered with the YAG phosphor layer and the red light emitted by the red LED chip 2 are fully mixed in the light mixing cavity 6 . The light sensor 3 detects the luminous...

Embodiment 2

[0031] Such as figure 2 As shown, a highly stable red light enhanced color rendering LED light source module, the module substrate 5 is welded with a white LED chip 1 , a red LED chip 2 , a light sensor 3 and a temperature sensor 4 at the same time. Among them, the white LED1 and the red LED2 are packaged finished products and then integrated into the module. The interface between the first light-transmitting medium 7 and the second light-transmitting medium 8 is also made into a semicircle. Others are the same as in Example 1.

Embodiment 3

[0033] Such as image 3 As shown, the lower surface of the second light-transmitting medium 8 of the module is made of a multi-layer film structure, and the parameters of the multi-layer film should be set according to the red light wavelength and light transmittance that need to be enhanced. Others are then the same as in Example 1. The multi-layer film structure can achieve two important functions: 1. Improve the light extraction efficiency of the red light part and enhance the color rendering; 2. Prevent the influence of red light on the light sensor and improve the accuracy of light mixing.

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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...

Claims

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Application Information

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IPC IPC(8): F21S2/00F21V5/00F21V7/04F21V23/00H05B37/02F21Y101/02F21K9/20
Inventor 吴昊王钢凌敏捷冼钰伦
Owner SUN YAT SEN UNIV
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