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LED light source capable of simulating blackbody radiation spectrum, making method thereof and application

A technology of LED light source and black body radiation, which is applied in the field of LED light source simulating the spectrum of black body radiation, can solve problems such as damage to the human visual system, excessive blue light, and lack of color, and achieve the effects of wide application range, simple operation, and simple structure

Active Publication Date: 2018-01-23
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of excessive blue light in the existing LED light source, and the lack of color in the spectrum, which damages the human visual system, and provides an LED light source capable of simulating blackbody radiation spectra with different color temperatures and its preparation method and application

Method used

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  • LED light source capable of simulating blackbody radiation spectrum, making method thereof and application
  • LED light source capable of simulating blackbody radiation spectrum, making method thereof and application
  • LED light source capable of simulating blackbody radiation spectrum, making method thereof and application

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preparation example Construction

[0060] The preparation method of the LED light source simulating the black body radiation spectrum of the present invention, the steps are as follows:

[0061] Step 1. First, mix the phosphor powder and glue evenly to obtain the glue containing phosphor powder, and then apply the phosphor powder glue on the blue LED chip or on the shell placed outside the blue LED chip, and wait for the coating to be cured to obtain the Measuring LED light source;

[0062] Step 2. Detect the LED light source to be tested obtained in step 1, obtain the spectrum of the LED light source to be tested, and judge whether it satisfies the following conditions (1)-(4); if any one is not satisfied, return to step 1, and use the target Guided by the spectrum of the black body radiation curve, by comparing with the spectrum of the LED light source to be tested, adjust one or more of the types of phosphors, the ratio between various types of phosphors, and the ratio of phosphors and glue; If all are sati...

Embodiment 1

[0076] An LED light source that simulates a black body radiation spectrum, including a 450nm positive-mounted blue LED chip and a 5730SMD LED bracket. The blue LED chip is glued and fixed on the bracket, and connected to the positive and negative poles of the bracket through metal wires. The surface of the blue LED chip is coated with epoxy resin glue containing 10wt% fluorescent powder. The fluorescent powder is 490-500nm cyan fluorescent powder, 525-535nm yellow-green fluorescent powder, and 645-665nm red fluorescent powder with a mass ratio of 0.1:18:1.5. powder mixture.

[0077] tested, such as figure 1 As shown, the spectral similarity between the spectral color temperature of the LED light source in Example 1 and the 2000K blackbody radiation curve reaches 0.986, and the spectral angle matching degree is 0.995.

Embodiment 2

[0079] The LED light source that simulates the black body radiation spectrum, including 460nm flip-chip blue LED chip and COB bracket, the COB bracket is made of 19×19mm mirror aluminum substrate, obtained after passing through the dam, the blue LED chip is bonded and fixed on the bracket, and passed through the metal wire Connect with the positive and negative poles of the bracket. The surface of the blue LED chip is coated with silica gel containing 25wt% phosphor, which is a mixture of 490-500nm cyan phosphor, 525-535nm yellow-green phosphor, and 645-665nm red phosphor with a mass ratio of 0.2:18:1 .

[0080] tested, such as figure 2 As shown, the spectral similarity between the spectral color temperature of the LED light source in Example 2 and the 3200K blackbody radiation curve reaches 0.99, and the spectral angle matching degree is 0.998.

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Abstract

The invention discloses an LED light source capable of simulating a blackbody radiation spectrum, a making method thereof and application, which belong to the technical field of LEDs and solve the problems that the existing LED light source has much blue light, color loss exists in the spectrum and a human vision system is damaged. The LED light source comprises a blue LED chip; the blue LED chipis coated with glue containing phosphor powder or the blue LED chip is placed in a shell which is already coated with glue containing phosphor powder; and the phosphor powder contains 485-500 nm cyanphosphor powder, 520-540 nm yellowish-green phosphor powder and 645-660 nm red phosphor powder. The LED light source is a continuous spectrum in the range of visible light, not any color loss happens,the highest intensity of the spectrum is not the blue light, the similarity and the angle matching degree between the spectrum and the target blackbody radiation spectrum are both close to 1 in the visible light range, the color temperature range of the spectrum is 1500-6000K, and the LED light source can be used as a health light source.

Description

technical field [0001] The invention relates to the technical field of LEDs, in particular to an LED light source for simulating a blackbody radiation spectrum and its preparation and application. Background technique [0002] As a new type of lighting source, LED has the advantages of energy saving, environmental protection, high brightness, and long life. In recent years, with the maturity of LED lighting technology, people pay more and more attention to the field of healthy lighting. Due to the combination of blue light chip and yellow phosphor, the traditional LED light source has problems such as low color rendering index, high color temperature, and more blue light, which will cause certain damage to people's visual system. Therefore, how to provide healthy and comfortable lighting sources has become a concern of people. As we all know, the best light source should be natural light and black body radiation spectrum. Our common natural spectrum, including sunlight, c...

Claims

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Application Information

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IPC IPC(8): H01L33/50H01L21/66
Inventor 张家骅张亮亮张霞郝振东潘国徽
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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