CN110067950B

CN110067950B - Full-spectrum LED light mixing system

Info

Publication number: CN110067950B
Application number: CN201910414798.7A
Authority: CN
Inventors: 王宏民; 唐帆; 薛萍
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2019-05-18
Filing date: 2019-05-18
Publication date: 2021-05-04
Anticipated expiration: 2039-05-18
Also published as: CN110067950A

Abstract

A full-spectrum LED light mixing system belongs to the technical field of LED light sources; the white light LED light source aims at solving the problem that the white light LED in the prior art is poor in spectrum continuity. This application includes the LED lamp plate, a side-mounting reflector panel of LED lamp plate, the diffuser plate is installed to the opposite side of LED lamp plate, the LED lamp plate includes blue-green lamp plate, ruddiness lamp plate and white light lamp plate, blue-green lamp plate, ruddiness lamp plate and white light lamp plate are arranged from the reflector panel to the diffuser plate direction in proper order, be equipped with first leaded light layer between blue-green lamp plate and the reflector panel, be equipped with second leaded light layer between ruddiness lamp plate and the blue-green lamp plate, be equipped with third leaded light layer between ruddiness lamp plate and the white light. The full-spectrum LED illumination system has the advantages that the spectrum is close to the sunlight spectrum, the light mixing effect is good, the spectrum continuity is strong, and the color rendering property is high.

Description

Full-spectrum LED light mixing system

Technical Field

A light mixing system belongs to the technical field of LED light sources, and particularly relates to a full-spectrum LED light mixing system.

Background

As a novel cold light source, the LED has the advantages of small lamp source unit surface, good shock resistance, high lighting effect, long service life, capability of covering visible light part with wavelength, good monochromaticity, narrow full width at half maximum, incoherent light emission, capability of well controlling the composition of light emission spectrum and the like. The existing mature technology for generating white light by exciting yellow fluorescent powder by blue light enables a white light LED to have great improvement on light efficiency and color rendering, but has a great difference compared with sunlight. Therefore, simulation of natural light based on LED synthesized spectrum has been widely studied, but there is still a problem to be solved in how to improve the light mixing efficiency of different types of LEDs.

Disclosure of Invention

In order to solve the problems, the invention provides a full-spectrum LED light mixing system, which realizes full-spectrum efficient illumination, is suitable for the requirements of healthy and environment-friendly illumination environments of different occasions, and has a wider application range.

The full-spectrum LED light mixing system comprises an LED lamp panel, wherein a reflector is arranged on one side of the LED lamp panel, a diffuser plate is arranged on the other side of the LED lamp panel, the LED lamp panel comprises a blue-green lamp panel, a red lamp panel and a white lamp panel, the blue-green lamp panel, the red lamp panel and the white lamp panel are sequentially arranged from the reflector plate to the diffuser plate, a first light guide layer is arranged between the blue-green lamp panel and the reflector plate, a second light guide layer is arranged between the red lamp panel and the blue-green lamp panel, and a third light guide layer is arranged between the red lamp panel and the white lamp panel.

Preferably, install blue-green LED light source array on the blue-green lamp plate, install ruddiness LED light source array on the ruddiness lamp plate, install white light LED light source array on the white light lamp, blue-green LED light source is blue-green LED chip, and ruddiness LED light source is ruddiness LED chip, and the white light LED light source is white light LED chip.

Preferably, the blue-green light LED light source is a blue-green light LED chip with a dominant wavelength of 505-480 nm, the red light LED light source is generated by the nitride red fluorescent powder with an excitation emission peak of 680-750 of 460-480nm blue light LED, and the white light LED light source is generated by the nitride yellow fluorescent powder with an excitation emission peak of 580-610 of 450-470nm blue light LED.

Preferably, the power of the single white light LED light source, the single blue-green LED light source and the single red light LED light source are the same, and the ratio of the number of the white light LED light sources on the white light lamp panel to the number of the blue-green LED light sources on the blue-green lamp panel to the number of the red light LED light sources on the red light lamp panel is (3-10):1: 1.

Preferably, be equipped with the first leaded light point that even array arranged on the aspect of first leaded light layer light source side, be equipped with the second leaded light point that even array arranged on the aspect of second leaded light layer light source side, be equipped with the third leaded light point that even array arranged on the aspect of third leaded light layer light source side, first leaded light point, second leaded light point and third leaded light point interval arrangement.

The light guide points in the first light guide layer, the second light guide layer and the third light guide layer are concave points formed by laser dotting, the mesh points are the same in size and shape, light is continuously transmitted in the light guide plate, the luminous flux is continuously reduced due to the fact that light rays are emitted from the front side, and under the condition that the mesh points are not changed in size, the mesh point distance is gradually reduced and becomes denser along with the increase of the distance from the light source in order to ensure that the illumination of the light emitting surface is uniform.

Preferably, the number of the third light guide points is larger than that of the second light guide points and that of the first light guide points.

Preferably, the first light guide layer is composed of a plurality of first unit light guide points, the second light guide layer is composed of a plurality of second unit light guide points, and the third light arrival layer is composed of a plurality of third unit light guide points.

Preferably, the number of the first unit light guide points is greater than or equal to 10000, and the number of the first unit light guide points, the number of the second unit light guide points and the number of the third unit light guide points are the same.

Compared with the prior art, the invention has the following beneficial effects:

1) the LED light source device comprises a blue-green LED light source, a red LED light source, a white LED light source, a plurality of light guide layers, a light reflecting plate and a diffusion plate, wherein the light reflecting plate is arranged on the light guide layers;

2) the full-light spectrum of the LED is similar to the sunlight spectrum, so that a comfortable lighting environment is provided for human eyes;

3) the light mixing system is simple in structure, free of special environmental requirements in building and using, suitable for different occasions, capable of meeting requirements of health and environment-friendly lighting environments, and wide in application range.

Drawings

Fig. 1 is a schematic view of an overall structure of a full-spectrum LED light mixing system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a first light guide layer, a second light guide layer and a third light guide layer according to the present embodiment;

FIG. 3 is a schematic front view of unit light guide points of each light guide plate of this embodiment, FIG. 3a is a schematic structural view of a first light guide layer unit light guide point, FIG. 3b is a schematic structural view of a second light guide layer unit light guide point, and FIG. 3c is a schematic structural view of a third light guide layer unit light guide point;

fig. 4 is a schematic structural diagram of the LED lamp panel according to the embodiment;

FIG. 5 is a spectrum diagram of a white light LED according to the present embodiment;

FIG. 6 is a blue-green LED spectrum and a nitride red phosphor spectrum according to the present embodiment;

FIG. 7 is a graph of a mixed light fitting spectrum according to the present embodiment;

FIG. 8 is a comparison graph of the mixed light spectrum and the sunlight spectrum of the present embodiment;

in the figure, 1-LED lamp panel, 11-blue-green LED light source, 12-red LED light source, 13-white LED light source, 21-first light guide layer, 22-first light guide layer, 23-third light guide layer, 24-first unit light guide point, 25-second unit light guide point, 26-third unit light guide point, 3-reflector plate and 4-diffuser plate.

Detailed Description

For the purpose of describing the present application in detail, embodiments thereof are described below with reference to the accompanying drawings.

The full-spectrum LED light mixing system of the embodiment is shown in fig. 1, and comprises a blue-green lamp panel, a first light guide layer 21, a blue-green lamp panel, a second light guide layer 22, a red light lamp panel, a third light guide layer 23, a white light lamp panel and a diffusion plate 4 which are sequentially arranged from bottom to top, wherein the blue-green lamp panel, the red light lamp panel and the white light lamp panel are of side-light type structures, the blue-green lamp panel, the red light lamp panel and the white light lamp panel form an LED lamp panel 1, reflected light of a blue-green LED light source 11 is derived from the front of the first light guide layer 21, reflected light of a red LED light source 12 is derived from the front of the second light guide layer 22, and reflected light of a; the main body of the reflector 3 of this embodiment is made of PET, and the diffuser 4 is made of polycarbonate and has a thickness of 1.2 mm.

As shown in fig. 4, the blue-green lamp panel structure is formed by installing a plurality of blue-green light LED light source arrays on an aluminum-based circuit board, the red light lamp panel structure is formed by installing a plurality of red light LED light source 12 arrays on the aluminum-based circuit board, and the white light lamp structure is formed by installing a plurality of white light LED light source 13 arrays on the aluminum-based circuit board.

According to the grassmann color mixing law, if there are two colors of light, the light of the first color is matched by the three primary colors of R1, G1, and B1, and the light of the second color is matched by the three primary colors of R2, G2, and B21, the additive color mixture of the two colors of light can be represented by RGB, where R ═ R1+ R2, G ═ G1+ G2, B ═ B1+ B2, R1, G1, B1, and R2, G2, and B2 are the tristimulus values of the light of the first color and the light of the second color, respectively, and the color addition principle is applicable not only to the addition of two colors but also to the addition of a plurality of colors.

As shown in fig. 5, the white LED light source 13 has two peak wavelengths, wherein the main peak wavelength is about 600nm, the secondary peak wavelength is about 450nm, and a trough is formed at 500nm, the whole spectrum curve covers the visible light range of human eyes, and the positions of the blue-green LED light source and the red LED light source are just the lower positions of the white LED spectrum energy, so as to make up the deficiency of the whole energy at both sides. In view of the above analysis, the present invention adopts a combination of the white LED light source and the red LED light source 12 and the blue-green LED light source 11 to simulate the sunlight spectrum, and realizes the full spectrum, as shown in the comparison graph of the mixed light spectrum and the sunlight spectrum in fig. 8.

Since the light colors of the light sources are different due to the size of the wavelength, the transmittance of the light is different due to the difference of the light colors, and the transmittance of the light is smaller than that of the blue light, the blue light LED light source 11 is used as a first layer light source, the red light LED light source 12 is used as a second layer light source, and the white light LED light source 13 is used as a main light source and is a third layer light source.

The dominant wavelength of the blue-green LED light source 11 of this embodiment is 505-515nm, the power of a single blue-green LED light source 11 is 0.5W, the rated operating current is 150mA, and the rated operating voltage is: 2.0-2.6V, and the light source spectrum is shown in figure 6;

the red LED light source 12 is generated by exciting the nitride red fluorescent powder with the emission peak value at 680-750 with a 460-480nm blue LED, the power of a single red LED light source is 0.5W, the rated working current is 150mA, and the rated working voltage is as follows: 2.0-2.6V, and the spectrum of the nitride red fluorescent powder is shown in figure 6;

the white light LED light source 13 is generated by exciting the nitride yellow fluorescent powder with the emission peak value of 580-610 by a 450-470nm blue light LED, the color temperature is 4000K-5000K, the CRI is more than 90, R9 is more than 80, the power of a single white light LED light source is 0.5W, the rated working current is 150mA, the working voltage is: 2.9-3.4V, and the light source spectrum is shown in figure 5.

In the embodiment, the power of a single white light LED light source 13, a single blue-green light LED light source and a single red light LED light source 12 are the same, and the ratio of the number of the white light LED light sources 13 on the white light lamp panel to the number of the blue-green LED light sources on the blue-green light lamp panel to the number of the red light LED light sources 12 on the red light lamp panel is (3-10):1: 1.

Because the typical natural light color temperature is usually 3000K-6500K, the invention selects the white light LED light source with the color temperature of 4000K-5000K as the main light source, selects the blue-green light LED light source and the red light LED light source with the proportion of 1:1 as the auxiliary light source, and the quantity of the three LED light sources can be adjusted according to the illumination intensity requirement of the actual illumination environment in the practical application; the luminous intensity of the two light sources can be changed by adjusting the currents flowing through different branches of the blue-green light LED light source and the red light LED light source, and then the mixing proportion of the two light sources is adjusted to mix light with the white light LED, so that the simulation of natural light with different color temperatures is realized.

As shown in FIG. 2, the thickness d of each light guide layer₁2mm, spacing d between each layer₂According to the encapsulation size of lamp pearl of selecting and deciding, be equipped with the first leaded light point that the matrix was arranged on the aspect of first leaded light layer 21 light source side, be equipped with the second leaded light point that the matrix was arranged on the aspect of second leaded light layer 22 light source side, be equipped with the third leaded light point that the matrix was arranged on the aspect of third leaded light layer 23 light source side, first leaded light point, second leaded light point and third leaded light point do not shelter from each other, become the light of pointolite light source and reflect away and mix with other colour spectrums, form required spectrum.

The light guide points on the first light guide layer 21, the second light guide layer 22 and the third light guide layer 23 are all pits formed by laser dotting, the mesh points are the same in size and shape, and the principle of the pit is that the pit is a three-dimensional grating and three-dimensional diffuse reflection. With the continuous transmission of light in the light guide plate, the luminous flux is continuously reduced because light is emitted from the front surface, and under the condition that the size of the mesh points is not changed, in order to ensure the uniform illumination of the light emitting surface, the space between the mesh points is gradually reduced along with the increase of the distance from the light source, so that the mesh points become denser.

In this embodiment, since the light is gradually mixed from bottom to top, the number of the corresponding second light guide points is greater than the number of the first light guide points, and the number of the third light guide points is greater than the number of the second light guide points.

The first light guide layer is composed of a plurality of first unit light guide points, the second light guide layer is composed of a plurality of second unit light guide points, and the third light arrival layer is composed of a plurality of third unit light guide points. The quantity of first unit leaded light point is more than or equal to 10000, and the quantity of first unit leaded light point, the quantity of second unit leaded light point and third unit leaded light point are the same.

The areas of the three light guide plates of the embodiment are the same, the light guide point 21 structure of the first light guide layer unit is shown in fig. 3a, the distance between the light guide points in the figure is gradually reduced along the direction away from the light source, that is, the density of the light guide points is gradually increased along the direction away from the light source, the light guide points of the units are arranged in a longitudinal array, similarly, the light guide point structure of the second light guide layer unit 22 is shown in fig. 3b, and the light guide point structure of the third light guide layer unit 23 is shown in fig. 3 c.

The foregoing descriptions of embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and their practical applications, to thereby enable others skilled in the art to best utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. It is, therefore, to be understood that the invention is intended to cover all modifications and equivalents within the scope of the following claims.

Claims

1. The utility model provides a full gloss register for easy reference LED mixes light system, includes the LED lamp plate, a side-mounting reflector panel of LED lamp plate, and the diffuser plate, its characterized in that are installed to the opposite side of LED lamp plate: the LED lamp panel comprises a blue-green lamp panel, a red lamp panel and a white lamp panel, the blue-green lamp panel, the red lamp panel and the white lamp panel are sequentially arranged from the reflector panel to the direction of the diffusion panel, a first light guide layer is arranged between the blue-green lamp panel and the reflector panel, a second light guide layer is arranged between the red lamp panel and the blue-green lamp panel, and a third light guide layer is arranged between the red lamp panel and the white lamp panel;

the light source side layer of the first light guide layer is provided with first light guide points which are uniformly arranged in an array manner, the light source side layer of the second light guide layer is provided with second light guide points which are uniformly arranged in an array manner, the light source side layer of the third light guide layer is provided with third light guide points which are uniformly arranged in an array manner, the first light guide points, the second light guide points and the third light guide points are arranged at intervals, and the number of the third light guide points is greater than that of the second light guide points and greater than that of the first light guide points; the density of the first light guide points is gradually increased in the direction far away from the light source, the density of the second light guide points is gradually increased in the direction far away from the light source, and the density of the third light guide points is gradually increased in the direction far away from the light source;

the first light guide layer is composed of a plurality of first unit light guide points, the second light guide layer is composed of a plurality of second unit light guide points, the third light guide layer is composed of a plurality of third unit light guide points, and a plurality of unit light guide points are arranged in a longitudinal array; the number of the first unit light guide points is more than or equal to 10000, and the number of the first unit light guide points, the number of the second unit light guide points and the number of the third unit light guide points are the same;

a distance exists between the first light guide layer and the second light guide layer, and between the second light guide layer and the third light guide layer;

install blue-green light LED light source array on the blue-green lamp plate, install ruddiness LED light source array on the ruddiness lamp plate, install white light LED light source array on the white light lamp, the power of single blue-green light LED light source is 0.5W, the power of single ruddiness LED light source is 0.5W, white light LED light source shows that to indicate the characteristic CRI and is greater than 90, R9 is greater than 80, single white light LED light source power is 0.5W.

2. The full spectrum LED mixing system of claim 1, wherein: the blue-green LED light source is a blue-green LED chip with the dominant wavelength of 505-515nm, the red LED light source is generated by nitride red fluorescent powder with the excitation emission peak value of 460-480nm blue LED at 680-750nm, and the white LED light source is generated by nitride yellow fluorescent powder with the excitation emission peak value of 450-470nm blue LED at 580-610 nm.

3. The full spectrum LED mixing system of claim 2, wherein: the ratio of the number of white light LED light sources on the white light lamp panel to the number of blue-green light LED light sources on the blue-green light lamp panel to the number of red light LED light sources on the red light lamp panel is (3-10):1: 1.