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LED light source for simulating black body radiation spectrum and its preparation method 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, lack of color, excessive blue light, etc., and achieve the effects of wide application range, simple operation, and simple preparation method

Active Publication Date: 2020-02-07
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 for simulating black body radiation spectrum and its preparation method and application
  • LED light source for simulating black body radiation spectrum and its preparation method and application
  • LED light source for simulating black body radiation spectrum and its preparation method and application

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preparation example Construction

[0060] The preparation method of the LED light source simulating blackbody radiation spectrum of the present invention has the following steps:

[0061] Step 1. First mix the phosphor and glue uniformly to obtain glue containing phosphor, and then apply the phosphor glue on the blue LED chip or on the shell placed outside the blue LED chip, and the coating is cured to obtain the Measure 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 determine whether it meets the following conditions (1)-(4); if any one of them is not satisfied, return to Step 1, and set the target The spectrum of the black body radiation curve is a guide. By comparing with the spectrum of the LED light source to be tested, adjust one or more of the type of phosphor, the ratio of various types of phosphor, and the ratio of phosphor to glue; If all are satisfied, the LED light source to be tested is the LE...

Embodiment 1

[0076] The LED light source that simulates the black body radiation spectrum includes a 450nm front-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 containing 10wt% phosphor. The phosphor is 490-500nm cyan phosphor, 525-535nm yellow-green phosphor, 645-665nm red phosphor with a mass ratio of 0.1:18:1.5 Mixture of powder.

[0077] After testing, such as figure 1 As shown, the spectral color temperature of the LED light source of Example 1 and the 2000K blackbody radiation curve spectral similarity reached 0.986, and the spectral angle matching degree was 0.995.

Embodiment 2

[0079] The LED light source that simulates the black body radiation spectrum includes a 460nm flip-chip blue LED chip and a COB bracket. The COB bracket adopts a 19×19mm mirror aluminum substrate, which is obtained after passing through the dam. The blue LED chip is glued and fixed on the bracket with a 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. The phosphor 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] After testing, such as figure 2 As shown, the spectral color temperature of the LED light source of Example 2 and the 3200K blackbody radiation curve spectral similarity reached 0.99, and the spectral angle matching degree was 0.998.

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Abstract

An LED light source for simulating a black body radiation spectrum and its preparation and application belong to the technical field of LEDs. It solves the problem that the existing LED light source has too much blue light, and there is a lack of color in the spectrum, which damages the human visual system. The LED light source of the present invention comprises a blue LED chip, and the blue LED chip is coated with glue containing phosphor powder, or the blue LED chip is placed in a shell coated with glue containing phosphor powder; wherein, the phosphor powder contains 485- Cyan phosphor at 500nm, yellow-green phosphor at 520‑540nm and red phosphor at 645‑660nm. The LED light source has a continuous spectrum in the visible light range, without any color loss, and the highest intensity of the spectrum is not blue light. The similarity and angle matching between the spectrum and the target black body radiation spectrum are close to 1 in the visible light range. The color temperature range of the spectrum is 1500‑6000K, can be used as a healthy light source.

Description

Technical field [0001] The invention relates to the technical field of LEDs, in particular to an LED light source simulating 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. With the maturity of LED lighting technology in recent years, more and more people are focusing on the field of health lighting. Traditional LED light sources have problems such as low color rendering index, high color temperature, and more blue light due to the use of blue light chips combined with yellow phosphors, which cause certain damage to people's visual systems. Therefore, how to provide a healthy and comfortable lighting source has become a problem that people care about. As we all know, the best light source should be natural light and black body radiation spectrum. Our common natural spectrum, including sunlight, candl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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