CN108843983A

CN108843983A - A kind of the quasi- nature radiant and lamps and lanterns of high feux rouges

Info

Publication number: CN108843983A
Application number: CN201810681592.6A
Authority: CN
Inventors: 曾胜; 曾灵芝; 曾骄阳; 陈俊达; 陈道蓉; 许瑞龙
Original assignee: Langchao Innovation Holdings (shenzhen) Co Ltd
Current assignee: Langchao Innovation Holdings (shenzhen) Co Ltd
Priority date: 2018-06-27
Filing date: 2018-06-27
Publication date: 2018-11-20

Abstract

The present invention provides a kind of natural radiant of standard of high feux rouges, including bearing basement, at least one set of luminescence unit and circuit structure；Every group of luminescence unit includes the white emitter for emitting white light and the red emitter for glowing, and feux rouges forms quasi- natural light relative to the part that natural spectrum lacks for compensating white light；Red emitter includes red light chips, and the wavelength of red light chips is 640-700nm；The relative spectral power of 640-700nm feux rouges is greater than 0.50 in quasi- natural light.This light source improves the relative spectral power of feux rouges, and then improves the healthcare function of light source.The light that the light source issues can cover the wave band of natural light, provide more naturally comfortable illuminating effect.Structure of the invention is succinct, compact, and applicability is good.

Description

Quasi-natural light source with high red light and lamp

Technical Field

The invention relates to the technical field of LEDs, in particular to a high-red quasi-natural light source and a lamp comprising the same.

Background

With the development of lighting technology, people are increasingly demanding on the overall performance of lighting, such as quality and comfort, and various new light sources and technologies are emerging continuously, such as LED light sources simulating natural light spectrum, needless to say, the most ideal lighting light is natural light, and natural light lighting is always a vision of lighting industry.

In the visible light seen by human eyes, 640-700nm red light is beneficial to human health, and for example, in the fields of medical treatment and cosmetology, the red light generating device is generally used for irradiating human bodies, promoting the blood circulation of the bodies and improving the health condition. People who are engaged in some special professions (such as astronauts) carry out red light therapy according to time to ensure the health of the people. Natural light contains a high proportion of red light, especially the high 640-700nm red light. And this portion of red light is clearly missing from the artificial white light source.

Referring to fig. 14, the light emitted by the existing light source close to natural light illumination still has a problem of large spectral difference from natural light, and obvious deficiency appears in red light part, and simultaneously, the light is too high in blue light part, so that the damage to human body cannot be ignored.

Fig. 12 illustrates the spectrum of a conventional white light source using a blue chip in combination with a phosphor, and since the wavelength of the chip and the wavelength range of the phosphor are limited, the spectrum of the combined structure is still greatly different from that of natural light, and the ratio of red light is too low.

Referring to fig. 13, which illustrates a three primary color combination structure using red, green and blue chips, the white light has a very non-uniform spectrum, and except for the peaks at the three central wavelengths of red, green and blue, the relative spectral power of the red light in the long wavelength band is very low, which is obviously not suitable for the health care lighting.

Disclosure of Invention

The invention aims to provide a high-red quasi-natural light LED light source, and aims to solve the technical problem that the red light proportion of the traditional LED light source is too low.

The invention is realized in such a way that a quasi-natural light source with high red light comprises a bearing substrate and at least one group of light-emitting units arranged on the surface of the bearing substrate, wherein the light-emitting units are electrically connected with a circuit structure arranged on the bearing substrate; each group of the light emitting units comprises a white light emitting body for emitting white light and a red light emitting body for emitting red light, wherein the red light is used for compensating the missing part of the white light relative to a natural spectrum to form quasi-natural light; the red luminous body comprises a red light chip, and the wavelength of the red light chip is 640-700 nm; the relative spectral power of 640-700nm red light in the quasi-natural light is more than 0.50.

In one embodiment, the red light chip is flip-chip or face-mounted on the carrier substrate, and a ratio of total luminous flux of the white light to total luminous radiation of the red light is 2-3: 1.

As an embodiment, the color temperature range of the quasi-natural light is 2500-6500K;

when the color temperature of the quasi-natural light is 2700K-3000K, the relative spectral power of the red light with the wavelength of 640-700nm is more than 0.70;

when the color temperature of the quasi-natural light is 4000K-4200K, the relative spectral power of red light with the wavelength of 640-700nm is larger than 0.60;

when the color temperature of the quasi-natural light is 5500K-6000K, the relative spectral power of red light with the wavelength of 640-700nm is larger than 0.50.

As an embodiment, the relative spectral power of red light with the wavelength of 680-690 nm in the quasi-natural light is more than 0.80;

the relative spectral power of red light with the wavelength of 640-680 nm in the quasi-natural light is more than 0.60;

the relative spectral power of the red light with the wavelength of 622-640 nm in the quasi-natural light is larger than 0.60.

As an embodiment, the relative spectral power of orange light with the wavelength of 597-622 nm in the quasi-natural light is more than 0.55;

the relative spectral power of yellow light with the wavelength of 577-597 nm in the quasi-natural light is larger than 0.50;

the relative spectral power of green light with the wavelength of 492-577 nm in the quasi-natural light is larger than 0.35;

the spectral power of cyan light with the wavelength of 475-492nm in the quasi-natural light is more than 0.30;

the relative spectral power of blue light with the wavelength of 435-475 nm in the quasi-natural light is less than 0.75;

the relative spectral power of purple light with the wavelength of 380-435 nm in the quasi-natural light is less than 0.10.

As an embodiment, the white light emitter includes a blue light chip and a fluorescent film or a phosphorescent film disposed outside the blue light chip, the blue light chip is disposed on the carrier substrate in a forward or reverse manner, the fluorescent film or the phosphorescent film includes a colloid and fluorescent powder or phosphorescent powder mixed in the colloid, and the thickness of the fluorescent film or the phosphorescent film is 0.2-0.4 mm.

As an example, the white light has the following characteristics:

when the color temperature of the white light is 2700K-3000K, the relative spectral power of a 480-500nm waveband is larger than 0.30; the relative spectrum of the 500-640nm wave band is more than 0.70;

when the color temperature of the white light is 4000K-4200K, the relative spectral power of a 480-500nm waveband is larger than 0.45; the relative spectrum of the 500-640nm wave band is more than 0.65;

when the color temperature of the white light is 5500K-6000K, the relative spectral power of a 480-500nm wave band is more than 0.4; the relative spectrum of the 500-640nm wave band is more than 0.60.

As an embodiment, the color temperature range of the quasi-natural light is 2500-6500K; the quasi-natural light has a color rendering index Ra of more than 95, wherein the color rendering index of R9 is more than 90, and the color rendering index of R12 is more than 80; the quasi-natural light has a color tolerance of less than 5.

In one embodiment, the white light emitters and the red light emitters in each group of the light emitting units are connected in series and are driven uniformly by the same driving current.

Another object of the present invention is to provide a lamp including any one of the quasi-natural light sources with high red light.

The light source provided by the embodiment of the invention at least has the following effects:

firstly, the red luminous body is combined with the white luminous body, missing components of white light are compensated through the red luminous body, the relative spectral power of red light in quasi-natural light is improved, and further the health-care function of the light source is improved.

Secondly, the invention adopts the combination of the white luminous body and the red luminous body to obtain quasi-natural light and simultaneously promote red light, namely, the light emitted by the light source can cover the wave bands of the natural light and each wave band is closer to the natural light, therefore, the invention provides more natural and comfortable lighting effect and simultaneously promotes the health level.

Thirdly, the invention adopts the combination of the white luminous body and the red luminous body to obtain the near natural light, has simple structure and good variable controllability in the debugging process, realizes the debugging of the near natural light, solves the problem that the near natural light cannot be obtained by combining a plurality of luminous bodies, and solves the problem that the complete near natural light cannot be obtained by combining a blue light chip and fluorescent glue by supplementing the red luminous body to obtain the near natural light.

Fourthly, the white luminous body and the red luminous body can adopt the micro luminous body meeting the performance requirements, the whole light source is a micro lamp bead, a plurality of lamp beads can be arranged on the electric connection structural plate of various lamps in any form, and the lamp can be arranged at any position of the electric connection structural plate due to the small size, is flexible to apply, and has the advantages of uniform whole light emission and good lighting effect.

Drawings

Fig. 1 is a schematic perspective view of a quasi-natural light source with high red light provided by an embodiment of the present invention;

FIG. 2 is a top view of a quasi-natural light source with high red light provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a quasi-natural light source of high red light provided by an embodiment of the present invention;

FIG. 4 is a bottom view of a quasi-natural light source with high red light provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a white light emitter of a quasi-natural light source with high red light according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a spectrum of near natural light provided by an embodiment of the present invention;

FIG. 7 is a report of a near natural light spectrum test of FIG. 6;

FIG. 8 is a graph comparing spectra of a quasi-natural light source of high red light and natural light provided by an embodiment of the present invention;

FIG. 9 is a comparison graph of spectra of a conventional near natural light source and natural light;

FIG. 10 is a spectrum of a white light emitter provided by an embodiment of the present invention;

FIG. 11 is a spectrum of white light using a 452.5-455nm blue light chip according to an embodiment of the present invention;

FIG. 12 is a first spectral plot of a prior art white light source;

FIG. 13 is a second spectral diagram of a prior art white light source;

FIG. 14 is a spectral diagram of a prior art near natural light source.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

In order to explain the technical solution of the present invention, the following detailed description is made with reference to the specific drawings and examples.

Explanation of technical terms:

1. relative spectral power:

the spectrum emitted by a light source is often not a single wavelength, but consists of a mixture of many different wavelengths of radiation. The spectral radiation of the light source in wavelength order and the intensity distribution of the individual wavelengths is referred to as the spectral power distribution of the light source.

The parameters for characterizing the magnitude of the spectral power are divided into absolute spectral power and relative spectral power. And then the absolute spectral power distribution curve: refers to a curve made of absolute values of the energy of various wavelengths of the spectral radiation;

relative spectral power distribution curve: the spectral power distribution curve is a spectral power distribution curve in which energies of various wavelengths of a light source radiation spectrum are compared with each other, and the radiation power is changed only within a predetermined range after normalization processing. The relative spectral power with the maximum radiation power is 1, and the relative spectral power of other wavelengths is less than 1.

2. Color ratio:

any white light can be obtained by mixing the three primary colors of red, green and blue in corresponding proportion, and chromaticity coordinates R, G and B are introduced in order to represent the relative proportion of the R, G, B primary colors in the total white light, wherein R is R/(R + G + B), G is G/(R + G + B), B is B/(R + G + B), R + G + B is 1, and R, G and B are respectively a red color ratio, a green color ratio and a blue color ratio.

Referring to fig. 1 to 4, an embodiment of the invention provides a low-blue LED light source (hereinafter, referred to as "the light source") for various lighting devices. The quasi-natural light LED light source with high red light comprises a bearing substrate 10 and at least one group of light-emitting units 20 arranged on the surface of the bearing substrate 10, wherein the light-emitting units 20 are electrically connected with a circuit structure 30 arranged on the bearing substrate 10; each group of light emitting units 20 includes a white light emitting body 21 for emitting white light and a red light emitting body 22 for emitting red light for compensating a portion of the white light missing from a natural spectrum to form quasi-natural light; the red luminous body 11 comprises a red light chip, and the wavelength of the red light chip is 640-700 nm; the relative spectral power of 640-700nm red light in quasi-natural light is more than 0.50.

In the field of LED lighting, it is one of the development trends in this field to research lighting sources close to natural light, and many researchers and units have been in the direction of effort, and there are some lighting products in the prior art that aim to approach natural light, and generally refer to such products as "near natural light", where the light generated by such products is close to natural light in spectral shape (relative spectral power of corresponding wavelength band), and at least part of the optical parameters are close to natural light, and the degree of this proximity is not limited to a certain value. The high-red LED light source in the embodiment can also realize the illumination effect close to natural light, and can improve the red light proportion.

Specifically, as described above, the basic support structure of the present light source is the carrier substrate 10, the light emitting units 20 are disposed on the carrier substrate 10, the number of the light emitting units 20 is one, two or more, and the structure and function of each light emitting unit 20 are identical. This embodiment is preferably a group. Each group of light emitting units 20 comprises a white light emitter 21 and a red light emitter 22, i.e. the present light source emits near-natural light by a mixture of white light and red light. The red light is used for compensating the part of the white light which is lacked relative to the natural spectrum, and then near natural light is formed.

Referring to fig. 5, the white light emitter 21 includes a blue light chip 211 and a fluorescent film 212 or a phosphorescent film covering the blue light chip 211, and the red light emitter 22 includes at least a red light chip, and the fluorescent film 212 performs wavelength conversion on monochromatic light emitted from the first chip 211 to generate other color light, and the plurality of color light are mixed to form white light, and the white light and the red light are mixed to form quasi-natural light. Each group of light emitting units 20 can emit near-natural light, so that quasi-natural light can be emitted in the case that the light source includes a plurality of groups of light emitting units 20.

The wavelength ranges of various colors of visible light are as follows: red light (622-700 nm), orange light (597-622 nm), yellow light (577-597 nm), green light (492-577 nm), cyan light (475-492 nm), blue light (435-475 nm) and purple light (380-435 nm).

The red luminous body of the light source is used for compensating the red light missing part in the white light, so that the relative spectral power of the 640-700nm red light is obviously improved, which is difficult to realize in the existing near-natural light source, and mainly shows that the improvement of the red light and the whole spectral shape and other optical parameters are difficult to take into account. This embodiment is achieved through a large amount of basic research and a continuous optimization process. As shown in fig. 6 to 8, which respectively illustrate a spectrogram and spectral test data of the quasi-natural light source of the present embodiment, the relative spectral power of red light with a wavelength of 680 to 690nm is greater than 0.80; the relative spectral power of the red light with the wavelength of 622-680 nm is more than 0.60. As can be seen from the figure, the spectrum is close to that of natural light, and the proportion of red light is increased. Referring to fig. 9 and 14, the difference between the existing near-natural light spectrum and the natural light spectrum is still large, and the red light part has obvious defects.

In addition, through the test of light sources with different color temperatures, when the color temperature of quasi-natural light is 2700K-3000K, the relative spectral power of red light with the wavelength of 640-700nm is more than 0.70; when the color temperature of quasi-natural light is 4000K-4200K, the relative spectral power of red light with the wavelength of 640-700nm is more than 0.60; when the color temperature of quasi-natural light is 5500K-6000K, the relative spectral power of red light with the wavelength of 640-700nm is more than 0.50.

Further, among visible light, ultraviolet, violet, and blue light are most harmful to human eyes. The blue light accelerates the oxidative stress of photoreceptor cells in the macula lutea area in the retina and retinal pigment epithelial cells to cause damage, and the two cells are non-renewable, but once damaged, the vision is affected and irreversible, and the damage even causes blindness. Among cells of the human retina, blue light is perceived as a small percentage of cells, and blue light is scattered into the eye beyond a certain limit, and when the scattering phenomenon occurs, the light is diffused, and the texture and color of the object are distorted. The damage of blue light to eyes, especially to vision of immature students and children is obvious, so that the color of the children is weak, the color discrimination capability of the children is reduced, and the myopia rate of the juveniles is increased.

The light source of this embodiment has not only promoted the ruddiness proportion, has still restrained the blue light proportion, specifically: in quasi-natural light emitted by the light source, the relative spectral power of blue light is less than 0.75, and the color ratio of the blue light is less than 5.7%. This is mainly achieved by modifying the spectrum of the white emitter and supplementing the red emitter. Wherein, the wavelength range of the blue light chip of the white luminous body 21 is 450-480 nm; the wavelength range of the red chip of the red light emitter is 640-700nm, and specifically, it may be in a smaller range within the range, for example, the wavelength range is 680-700nm, corresponding to a center wavelength of 690 ± 5 nm. The center wavelength is typically the center of the wavelength range and allows a tunable interval around ± 2 nm. The central wavelength may also be 660nm, 670nm, 680nm, etc. for different intervals, and the embodiment is not limited to one.

The fluorescent film comprises colloid and fluorescent powder mixed in the colloid, and the fluorescent powder comprises red powder, green powder and yellow-green powder; the color coordinate of the red powder is X: 0.660 to 0.716, Y: 0.340-0.286; the color coordinate of the green powder is X: 0.064-0.081, Y: 0.488-0.507; the color coordinate of the yellow-green powder is X: 0.367 to 0.424, Y: 0.571 to 0.545; the weight ratio of red powder, green powder and yellow-green powder is as follows: red powder: green powder: yellow-green powder (0.010-0.035): (0.018-0.068): 0.071-0.253); the concentration of the fluorescent film is 17-43%. The particle size of red powder, green powder and yellow-green powder is less than 15 μm, preferably 13 + -2 μm.

Further, the red phosphor is preferably a nitride red phosphor, and more preferably, the nitride red phosphor includes CaSrAlSiN3(1113 structure). And the green phosphor is preferably oxynitride green phosphor, and more preferably, the oxynitride green phosphor comprises BaSi2O2N2(1222 structure). And the yellow-green powder preferably comprises Y3Al5Ga5O12 (i.e., gallium-doped yttrium aluminum garnet). The CaSrAlSiN3 nitride red fluorescent powder, the BaSi2O2N2 nitrogen oxide green fluorescent powder and the Y3Al5Ga5O12 yellow-green fluorescent powder can reach color coordinates required by the respective fluorescent powder, have better luminous intensity and stability, and are very suitable for being used in the fluorescent powder of the embodiment of the invention. The above-mentioned kinds of phosphors are commercially available.

Example 1 as a fluorescent film:

a fluorescent film comprises AB silica gel, CaSrAlSiN3 red phosphor (color coordinate, X: 0.660-0.716, Y: 0.286-0.340), BaSi2O2N2 green phosphor (color coordinate, X: 0.064-0.081, Y: 0.488-0.507) and Y3Al5Ga5O12 yellow-green phosphor (color coordinate, X: 0.367-0.424, Y: 0.545-0.571); wherein, the weight ratio of CaSrAlSiN3 red phosphor, BaSi2O2N2 green phosphor and Y3Al5Ga5O12 yellow-green phosphor is (0.020-0.035): (0.018-0.030): (0.140-0.253), and the mass percentage of the three fluorescent powders in the fluorescent film is 33-43%.

The fluorescent film can obtain near-natural white light with the color temperature of 2700K-3000K through blue light excitation: in the spectrum, the relative spectrum of 480-500nm wave band is greater than 0.30, and the relative spectrum of 500-640nm wave band is greater than 0.70.

Example 2 as a fluorescent film

A fluorescent film comprises AB silica gel, CaSrAlSiN3 red phosphor (color coordinate, X: 0.660-0.716, Y: 0.286-0.340), BaSi2O2N2 green phosphor (color coordinate, X: 0.064-0.081, Y: 0.488-0.507) and Y3Al5Ga5O12 yellow-green phosphor (color coordinate, X: 0.367-0.424, Y: 0.545-0.571); wherein, the weight ratio of CaSrAlSiN3 red phosphor, BaSi2O2N2 green phosphor and Y3Al5Ga5O12 yellow-green phosphor is (0.010-0.022): (0.020-0.040): (0.080-0.140), and the mass percentage of the three kinds of fluorescent powder in the fluorescent film is 25-35%.

The fluorescent film can obtain near-natural white light with the color temperature of 4000K-4200K by being excited by blue light: in the spectrum, the relative spectrum of 480-500nm wave band is greater than 0.45, and the relative spectrum of 500-640nm wave band is greater than 0.65.

Example 3 as a fluorescent film

A fluorescent film comprises AB silica gel, CaSrAlSiN3 red phosphor (color coordinate, X: 0.660-0.716, Y: 0.286-0.340), BaSi2O2N2 green phosphor (color coordinate, X: 0.064-0.081, Y: 0.488-0.507) and Y3Al5Ga5O12 yellow-green phosphor (color coordinate, X: 0.367-0.424, Y: 0.545-0.571); wherein, the weight ratio of CaSrAlSiN3 red phosphor, BaSi2O2N2 green phosphor and Y3Al5Ga5O12 yellow-green phosphor is (0.010-0.020): (0.030-0.068): (0.071-0.130), the mass percentage of the three kinds of fluorescent powder in the fluorescent film is 17-27%.

The fluorescent film can obtain white light of near natural light with color temperature of 5500K-6000K by blue light excitation: in the spectrum, the relative spectrum of 480-500nm wave band is greater than 0.40, and the relative spectrum of 500-640nm wave band is greater than 0.60.

By selecting the blue chip and the fluorescent film, white light can be obtained, the spectrum of which is shown in fig. 10. It has the following optical parameters: when the color temperature is 2700K-3000K, the relative spectral power of the 480-500nm wave band is more than 0.30; the relative spectral power of the 500-640nm wave band is more than 0.70; when the color temperature is 4000K-4200K, the relative spectral power of a 480-500nm waveband is larger than 0.45; the relative spectral power of the 500-640nm wave band is more than 0.65; when the color temperature is 5500K-6000K, the relative spectral power of a 480-500nm wave band is more than 0.4; the relative spectral power of the 500-640nm wave band is more than 0.60. The white light-emitting body 21 can be combined with the red light-emitting body 22 to obtain a quasi-natural light LED light source of high red light.

Further preferably, the blue light chip has a wavelength range of 457.5-480nm, at least 457.5-460nm, and the blue light chip helps to increase the proportion of cyan light. In many low-blue LED light sources, the blue light ratio is difficult to increase, and the blue light is more difficult to increase in the case of pulling down the blue light, and the color rendering index R12 corresponding to the blue light is also difficult to increase. According to the embodiment of the invention, on one hand, the blue light chip of 457.5nm-480nm is selected by breaking through the traditional convention (adopting the blue light chip of 450-455 nm), on the other hand, the development of the fluorescent film is dedicated, and the relative spectral power of the cyan light is obviously improved under double conditions. Meanwhile, due to the improvement of cyan light, the improvement of the color rendering index R12 also contributes to inhibiting blue light and keeping higher color temperature to a certain extent. As shown in fig. 11, the relative spectral power of cyan light in the conventional near-natural light is lower than 0.3, and as shown in fig. 6 and 7, the relative spectral power of cyan light in this embodiment reaches 0.4 or more.

Referring to fig. 10 and 11, fig. 10 shows the spectrum of the white light emitter 21 in this embodiment, when the blue light chip of 457.5nm to 460nm is used, the relative spectral power of the cyan light is already above 0.5, and may be higher when the blue light chip of 457.5nm to 480nm is used. When the 452.5-455nm blue light chip is used in FIG. 11, the relative spectrum of cyan light is only 0.35-0.38.

In addition, through the test of light sources with different color temperatures, when the color temperature of quasi-natural light is 2700K-3000K, the relative spectral power of cyan light with the wave band of 475-492nm is larger than 0.30; when the color temperature of quasi-natural light is 4000K-4200K, the relative spectral power of cyan light with a 475-492nm wave band is larger than 0.40; when the color temperature of quasi-natural light is 5500K-6000K, the relative spectral power of cyan light in a 475-492nm wave band is larger than 0.50.

Further, referring to fig. 8 and 9, the spectrum of the light source is also very similar to that of natural light in other bands, which is difficult to be realized by the existing near-natural light source. As shown in fig. 6 and 7, the relative spectral power of orange light in near natural light is greater than 0.55; the relative spectral power of the yellow light is greater than 0.50; the relative spectral power of the green light is greater than 0.35; the relative spectral power of the cyan light is greater than 0.30; the relative spectral power of the purple light is less than 0.10 and is close to that of natural light.

Further, in the field, according to the rules of a large number of traditional white lights, the color temperature of the white light is higher, the proportion of short wavelength components of the white light is higher, the blue light is higher, even the purple light is higher, the harm of the high blue light to health is an unambiguous fact, meanwhile, the high color temperature is favorable for improving the identification degree, the brightness of the environment is improved, the mental state of people is also an accepted common knowledge, the conventional light source is generally the white light with the high color temperature and the high blue light, and the advantages and the disadvantages are certainly possessed, and the requirements of all aspects are difficult to be considered. According to fig. 7, the light source still satisfies the condition that the relative spectral power of blue light is less than 0.75 under the condition of high color temperature of more than 4000K, is high-color-temperature low-blue-light illumination, and can simultaneously have the effects of eye health and mental state excitation.

In addition, the light source is more optimized in spectrum of each waveband, and has strict optical parameter requirements, such as color temperature, color tolerance, color rendering index Ra, color rendering index R9, color rendering index R12, blue light color ratio and the like. Specifically, the color temperature of the near-natural light comprises 2500K-6500K, and the color tolerance is less than 5. The apparent index Ra is more than 95, wherein the apparent index of R9 is more than 90, and the apparent index of R12 is more than 80. It can be determined from fig. 7 that the light source can satisfy the above requirements, and the blue light color ratio of the light source can be reduced to below 5.5%, the color rendering index Ra is increased to above 97, the color rendering index R9 is increased to above 95, the color rendering index R12 is increased to 83, and in other test reports, the color rendering index R12 is increased to 87.

Further, the blue light of 440nm in the blue light has the greatest damage to vision, and as a further optimization scheme, the relative spectral power of the blue light of 440nm is also used as an optical parameter to be detected in the embodiment. The relative spectral power of 440nm blue light is below 0.65 with a blue light color ratio below 5.7%. This is difficult to achieve with existing eye-protection electronic devices. The existing eye-protecting electronic product has low blue light color ratio, but the inhibition of 440nm blue light which has the greatest damage to human eyes is not obvious, and the eye-protecting function is very little. Other waveband components in the blue light are necessary for visual development, so that the effect of protecting eyes is not obvious when the blue light is greatly inhibited, and adverse effects are caused to the visual development of people such as children and infants, for example, the problems of poor color, reduced color discrimination capability and the like caused by excessive deficiency of the blue light component. In this embodiment, the effect of protecting eyesight can be truly achieved by focusing on the suppression of the intensity of blue light of 440nm on the basis of reducing the blue light color ratio to 5.7% or less.

The invention carries out a large number of debugging experiments by taking the optical parameters and the spectrum as targets, finally determines to adopt the white luminous body 21 and the red luminous body 22, determines the ratio of the luminous flux of the white luminous body 21 to the light radiation quantity of the red luminous body 22, and selects luminous bodies with proper specifications and quantity to manufacture the light source based on the ratio and the corresponding electrical parameters determined by the experiments.

Preferably, a micro white light emitter 21 and a micro red light emitter 22 are adopted, a blue light chip and a red light chip which are small in size and high in cost performance are selected according to the luminous flux ratio and the size of an installation space, the red light emitter 22 and the white light emitter 21 which are as few as possible are preferably selected to manufacture a single light source, and one light source is provided with a group of light emitting units 20. The light source can directly emit near-natural light, so that the light source can be used in various lamps, can be combined randomly, can ensure a better light-emitting effect and has strong adaptability. Of course, multiple sets of light emitting units 20 may be integrated into one light source, so that a better light emitting effect can be ensured and only the size is increased.

In particular, the ratio of the luminous flux of the white emitter 21 to the amount of light radiation of the red emitter 22 is 2-10:1, preferably 2-3: 1. At different color temperatures, the ratio slightly floated. In one embodiment, the ratio of the number of white emitters 21 to the number of red emitters 22 is 1-8:1, more preferably 1-4: 1. the actual red emitter 22 has an amount of light radiation of 80-160mW and the white emitter 21 has a total luminous flux of 200-350 lm.

In one embodiment, there are four white light emitters 21, one red light emitter 22, and four white light emitters 21 disposed around the red light emitter 22 and uniformly distributed.

In another embodiment, there are two white light emitters 21 and one red light emitter 22, and the two white light emitters 21 are symmetrically disposed on two sides of the red light emitter 22.

Regarding the mounting means of chip, preferably adorn blue light chip and ruddiness chip in the surface that bears basement 10 upside down, flip chip is favorable to and bears the effective connection of circuit structure 30 on the basement 10, is favorable to high-efficient heat dissipation, can unify the membrane through equipment on the chip, it is good to guarantee the fluorescent film uniformity of different products, and then can avoid the point of just installing the chip to glue the process and cause the poor problem of uniformity, simultaneously, make different products be in same BIN position at the colour temperature simultaneously, the colour temperature uniformity is good.

In addition, the flip chip also enables the volume of the white light emitting body 21 to be further reduced, which is beneficial to the control of the size of the light source. In the present embodiment, the width of the white light emitter 21 is less than 0.8mm, the height is less than 0.3mm, and the red light emitter 22 can be controlled within the same range. The distance between the adjacent white light emitter 21 and red light emitter 22 is 1mm or less. The length of the light source is less than or equal to 6mm, and the width of the light source is less than 3 mm.

Of course, the invention is not limited to the use of flip chips, as it is also feasible to use face-up chips.

In an embodiment, the carrier substrate 10 is preferably a laminated structure made of a non-metallic material, the carrier substrate 10 is provided with a reflective cup 11, the white light emitter 21 and the red light emitter 22 are disposed in the reflective cup 11, the circuit structure 30 is formed on the surface of the carrier substrate 10 and wraps the front and back surfaces of the carrier substrate 10, and a lead is formed outside the reflective cup 11, and a portion of the circuit structure 30 is exposed at the bottom of the reflective cup 11 for connecting the white light emitter 21 and the red light emitter 22.

Furthermore, the inner wall of the reflective cup 11 is provided with a reflective surface 111, the reflective cup 11 is further filled with an encapsulant (not shown), the reflective surface 111 is used for reflecting the white light and the red light, and the encapsulant is used for protecting the internal structure of the reflective cup 11, stabilizing the light source structure, and adjusting the light refraction. The white light and the red light are fully mixed and then output through the packaging colloid. Specifically, the light emission angles of the white light emitter 21 and the red light emitter 22 may be about 160 °, and the light emission angle of the light source may be about 120 °. The whole light source is a small-sized near-natural-light lamp bead which can uniformly emit light.

In this embodiment, the circuit structure 30 has a plurality of sets of positive and negative pins, and each light emitter may correspond to one set of positive and negative pins, or a plurality of light emitters correspond to one set of positive and negative pins. In the driving manner, there are two embodiments, one of which is that the white light emitter 21 and the red light emitter 22 are respectively connected to different positive and negative pins for independent driving, and at this time, the respective driving currents are different and can be controlled by matching with a control chip. Secondly, the white light-emitting body 21 and the red light-emitting body 22 are connected in series, namely, the same positive and negative pins are connected, the same current drive is unified, and a control chip is not needed for control.

Referring to fig. 1 and 2, two white light emitters 21 and one red light emitter 22 are connected in series, the two white light emitters 21 are respectively connected with a first pin 31, and the first pin 31 extends out of the bottom of the reflective cup 11 and is used for connecting an external power supply. The red light emitter 22 is connected in series between the two white light emitters 21.

Further, the light source may be further provided with a second pin 32, and the second pin 32 is not used for connecting an external power source, but is used for dissipating heat, and improving the symmetry of the whole light source, strength and stability of mounting on the circuit structure 30.

The first embodiment described above is relatively easy to implement. While the second embodiment, the spectral tuning is an extremely long and complex process, and the specific tuning process is as shown later. However, this unified driving method obviously has obvious advantages that it is not necessary to configure different driving currents for different luminaries, and it is not necessary to add the control circuit structure 30, and it is only necessary to supply power according to the corresponding currents. Therefore, the structure is simplified, the volume is further reduced, the application is simpler, more convenient and more flexible, and the cost is lower. This is the preferred circuit configuration 30 connection scheme of the present invention.

Further, in the embodiment of the present invention, a color temperature adjusting chip may be further added on the supporting substrate 10, and the color temperature adjusting chip is independent from the light emitting unit 20, and accordingly, the circuit structure 30 is appropriately adjusted, so that the color temperature adjusting chip can independently emit light or be extinguished, and further, the color temperature adjusting chip is mixed with the near-natural light emitted by the light emitting unit 20 by controlling the light emitting state of the color temperature adjusting chip, so as to adjust the color temperature.

Hereinafter, the optimization process of the low blue LED light source is briefly described.

The optimization process of the quasi-natural light LED light source with high red light is divided into two processes, wherein one process is the optimization process aiming at different driving currents, and the other process is the optimization process aiming at the same driving current.

The optimization procedure for different drive currents comprises the following steps:

step S101, selecting a first light emitter, wherein the first light emitter is used for emitting white light;

step S102, optimizing the spectral distribution of the first light emitter, and optimizing the white light into first near-natural light;

step S103, determining a to-be-optimized waveband of the first near natural light according to the spectral distribution of the first near natural light and the spectral distribution of the natural light;

step S104, selecting a second luminophor according to the to-be-optimized wave band;

step S105, lighting the first luminous body and the second luminous body according to a preset luminous flux ratio of the first luminous body and the second luminous body;

and S106, optimizing the combined spectrum of the first luminous body and the second luminous body by adjusting the spectral distribution of the first luminous body and the second luminous body to obtain near-natural light.

The optimization process for the same drive current includes the following steps:

step S201, selecting a first light emitter, wherein the first light emitter is used for emitting white light;

step S202, optimizing the spectral distribution of the first light emitter, and optimizing the white light into first near-natural light;

step S203, determining a to-be-optimized waveband of the first near natural light according to the spectral distribution of the first near natural light and the spectral distribution of the natural light;

step S204, selecting a second luminophor according to the to-be-optimized wave band;

step S205, determining an initial luminous flux ratio of a first luminous body and a second luminous body;

step S206, optimizing the combined spectrum of the first luminous body and the second luminous body by adjusting the spectral distribution of the first luminous body and the second luminous body to obtain near natural light, wherein the driving currents of the first luminous body and the second luminous body are the same or the difference is in a preset range; wherein the adjustment of the spectral distribution of the first and second light emitters comprises at least an adjustment of the drive current.

It can be seen that the two optimization processes are mainly distinguished from the sixth step. In the second optimization process, near-natural light is finally obtained under the condition of the same driving current. This difference directly results in a large difference in the ease of the two optimization processes.

In the first five steps of the two optimization processes, firstly, a luminous body emitting white light is selected as a first luminous body and is used as a main luminous body, and the main luminous body has a larger wavelength range and at least comprises a 400-640nm waveband. The white light is optimized to be the first near-natural light, so that the white light is as close to the natural light as possible, and the relative spectral power of the white light is improved as much as possible in the optimization process, so that the type selection of the subsequent second light-emitting body is simpler, the optimization of the combined spectrum of the two light-emitting bodies is facilitated, and the optimized first near-natural light has the characteristics described above.

With reference to the first near natural light spectrum, it can be determined that 640-700nm red light needs to be supplemented. Further selecting a second light-emitting body which emits red light, wherein the second light-emitting body is used for being combined with the first light-emitting body to obtain illumination light rays which are closer to natural light; on the other hand, by supplementing red light, blue light can be reduced, and this conclusion can be confirmed by the previous basic research, the contents of which will be described later in detail.

Further, according to the spectrum curve of the first near natural light and through a large number of combined spectrum debugging experiments, the central wavelength of the second luminous body is determined to be preferably 690 +/-5 nm, and the aim is to enable the relative spectral power of red light with the wavelength of 640-700nm to be close to the spectrum of the natural light as far as possible after the second luminous body is combined with the spectrum of the first near natural light.

In the fifth step, after the first illuminant and the second illuminant are determined, a reasonable luminous flux ratio, namely, the ratio of the luminous flux of the first illuminant and the light radiation quantity of the second illuminant, which is referred to as an "initial luminous flux ratio" herein, can be selected according to the spectrums of the two illuminants, and the initial luminous flux ratio can be preliminarily determined to be feasible within the range of 2-10:1 according to the wavelength ranges and the spectrum characteristics of the first near-natural light and the red light. Further, it can be further determined through experiments that the initial luminous flux ratio is in the range of 2-5:1, and then the process of optimizing the combined spectrum is performed by lighting a corresponding number of the first luminous bodies and a corresponding number of the second luminous bodies according to the preset initial luminous flux ratio.

The sixth step in the first optimization method:

the luminous flux of the first luminous body and the light radiation quantity of the second luminous body are adjusted mainly by adjusting the driving currents of the first luminous body and the second luminous body. Firstly, adjusting the driving currents of the first luminous body and the second luminous body, and monitoring the combined spectrum in real time until the relative spectral power of each waveband of the combined spectrum reaches a preset range. And then detecting the optical parameters of the combined spectrum, and if the optical parameters are unqualified, continuously adjusting the driving current until the optical parameters reach a preset range, and at the moment, confirming that the near-natural light is obtained. Finally, the actual ratio of the luminous flux of the first luminous body to the light radiation amount of the second luminous body, the actual driving currents of the first luminous body and the second luminous body and the corresponding optical parameters are recorded.

Preferably, corresponding spectrogram of near natural light, chromaticity diagram, other electrical parameters, light effect parameters, red, green and blue ratio parameters and other information are further stored. Of course, various optical parameters of the first and second emitters are preserved when selected, such as wavelength range, center wavelength, model, specification, current rating, light efficiency, etc.

When the driving current cannot be adjusted repeatedly, two options are available, wherein one option is to adjust the formula and/or the concentration and/or the thickness of the fluorescent film 212; and secondly, adjusting the central wavelength of the second light emitter or adding a third light emitter with the central wavelength different from that of the second light emitter. According to the basic research in the previous stage, the optimized relation between the fluorescent film and the spectrum and the optimized relation between the red light and the spectrum can be obtained, and under the guidance of a corresponding theory, a proper mode can be selected to adjust the optimization scheme.

Specifically, the first method specifically includes: firstly, adjusting the formula of the fluorescent film to adjust the relative spectral power and the color rendering index of each wave band; the formula refers to the components and the proportion of the fluorescent powder material in the fluorescent film. Secondly, adjusting the concentration of the fluorescent film to adjust the color rendering index and the color temperature; the concentration refers to the content of the fluorescent powder in the fluorescent film under the condition of determined formula; thirdly, adjusting the thickness of the fluorescent film to adjust the color temperature.

In the second mode, the center wavelength of the second light emitter is adjusted or a third light emitter having a center wavelength different from that of the second light emitter is added, and the second light emitter is combined with the first light emitter to perform optimization. By conducting a number of basic studies, it can be determined that the second luminophore also has a significant effect on the combined spectral distribution and light parameter.

A sixth step in the second optimization method:

not only near-natural light needs to be obtained, but also the driving current needs to be consistent, or slightly different within an allowable small range, so that in actual work, when the same current is adopted for driving, the obvious change of the spectrum and the optical parameters cannot be caused. The sixth step of the second optimization method is described in detail as follows:

the sixth step S206 includes the following substeps:

s21: adjusting the driving currents of the first light emitter and the second light emitter, monitoring the combined spectrum in real time, and performing step S22 when the relative spectral power of the combined spectrum reaches a predetermined range, otherwise, repeating step S21;

s22: detecting the optical parameters of the combined spectrum, and performing step S23 when the optical parameters reach a preset range, otherwise, returning to step S21;

s23: adjusting the driving current of the first light emitter and/or the second light emitter to enable the two driving currents to be consistent;

s24: adjusting the luminous flux of the first light emitter and/or the light radiation quantity of the second light emitter according to the change of the relative spectral power of the combined spectrum, monitoring the combined spectrum in real time, and performing step S25 when the relative spectral power of the combined spectrum meets a preset range, or performing step S21;

s25: detecting the optical parameters of the combined spectrum, confirming that near natural light is obtained when the optical parameters reach a preset range, and performing step S26, otherwise, performing step S21;

s26: recording the actual driving currents of the first luminous body and the second luminous body, the actual proportion of the luminous flux of the first luminous body and the light radiation quantity of the second luminous body and the optical parameters of the near-natural light.

The above steps disclose a specific implementation process of step S206, first, the first light emitter and the second light emitter in corresponding numbers are lit according to the initial luminous flux ratio, the luminous flux of the first light emitter and the light radiation amount of the second light emitter are respectively adjusted by adjusting the driving current, at this time, the combined spectrum changes, after a plurality of times of debugging, the shape of the combined spectrum (i.e. the relative spectral power of each band) and the natural light approach to the allowable range, and at this time, the spectrum is confirmed to meet the requirements.

On the basis, the optical parameters are checked, if the optical parameters meet the preset range, the near-natural light is determined to be obtained, and if the optical parameters do not meet the preset range, the driving current is repeatedly adjusted to enable the optical parameters to meet the requirements.

After both the spectral and optical parameters meet the requirements, the driving currents are usually inconsistent, and subsequent adjustments are required to achieve uniform driving, which is lengthy and complicated. Step S23 is first performed: adjusting the driving current of the first light emitter and/or the second light emitter to enable the two driving currents to be consistent; when the currents are uniform, the combined spectrum must change. Then, step S24 is performed: and further adjusting the luminous flux of the first luminous body and the light radiation quantity of the second luminous body according to the change of the relative spectral power of the combined spectrum, monitoring the combined spectrum in real time, wherein the adjusted luminous flux or light radiation quantity is the luminous flux or light radiation quantity, detecting the optical parameters of the combined spectrum when the relative spectral power of the combined spectrum conforms to a preset range, and confirming that the near-natural light is obtained when the optical parameters reach the preset range. This is an ideal situation.

However, after adjusting the luminous flux, it is difficult to conform the relative spectral power to a predetermined range, and the optical parameters are also liable to fluctuate. Therefore, steps S21 to S25 are repeated to readjust the driving current (in this case, fine tuning is required) so that the relative spectral power and the optical parameters meet the predetermined range. Since the step of adjusting the driving current to be consistent is performed every time in the process of repeating the steps S21-S25, the current will gradually tend to be consistent in a plurality of adjustments, and the adjustment range for the luminous flux and the current will gradually decrease, and finally, near-natural light meeting the requirements under the condition that the driving current is consistent will be obtained.

Further, in the optimization process of the combined spectrum, there may be the following cases: after the driving current is adjusted for many times, the spectrum or optical parameter still cannot meet the requirement, and at this time, step S20 is performed:

adjusting the formula and/or concentration and/or thickness of the phosphor film 212, and then performing step S21;

or,

adjusting the center wavelength of the second light emitter, and then performing step S21;

or,

a third emitter having a center wavelength different from the center wavelength of the second emitter is added and then step S21 is performed.

Also, based on the previous basic research (described later), the relationship between the fluorescent film and the spectrum optimization and the relationship between the red light and the spectrum optimization can be obtained, and under the guidance of the corresponding theory, the optimization scheme can be adjusted in a suitable manner.

In the actual optimization process, the adjustment of the phosphor film, the adjustment of the red luminous body 22 and the adjustment of the driving current and the luminous flux are repeated for many times, so that the final result can be obtained.

Finally, after the commissioning is finished, corresponding parameters need to be recorded, and the data is used for providing necessary information for the production and manufacturing of the light source.

After the optimization process, the white light-emitting body 21 and the red light-emitting body 22 are determined, and the actual ratio of the luminous flux of the white light-emitting body 21 to the light radiation amount of the red light-emitting body 22 is 2-3:1, and the current is 20-100mA, preferably 60 mA. Preferably, 1-4 white light emitters 21 and 1-2 red light emitters 22 are connected in series to form a light source, and the power of a single light source is about 0.5W. In the case where the color temperature is different, the actual data is slightly different. Corresponding data of several color temperatures can be determined as required to manufacture corresponding products. For example, lamps used in offices are generally selected as products having a higher color temperature, lamps used in homes are generally selected as products having a lower color temperature.

The spectrum and optical parameters of the current LED light source are not easy to be close to natural light, but the current LED light source is difficult to be driven by the same current. Different chips are combined together, if certain light is to be obtained, the current needs to be adjusted to meet the preset requirement, the driving currents of the chips are usually different, and if uniform driving, spectrum shape and light parameters meet the requirement, the finding of the types of white light and red light and the balance point of luminous flux and current is the biggest technical difficulty. The LED lamp is embodied on a light source product, namely, the LED lamp can emit near natural light by simple arrangement of two-foot drive and the light emitting unit 20, and the illumination quality and the applicability are greatly improved.

The basic research involved in the embodiments of the present invention is as follows:

basic research is as follows: research on near-natural light spectrum.

Natural light in nature comes from solar luminescence, and the natural light is different in four seasons or even different periods of a day, and mainly shows the difference of spectrum and color temperature. The sunlight in early spring morning makes people feel comfortable, and in the embodiment of the invention, the sunlight spectrum in early spring morning can be selected as a reference, and the relative spectral power and the optical parameters of the near-natural light are set. Of course, this is a preferred embodiment, and other times of natural light can be used as a measure to set the corresponding parameter requirements for near natural light. The optimization method provided by the embodiment of the invention is suitable for natural light at various times, and only needs to slightly adjust certain parameters.

Basic research two: spectral shape versus phosphor film formulation. Research shows that the fluorescent film formula has a large relation with the corresponding spectrum shape; changing the proportion of one powder in the formula can directly change the relative spectral power of the corresponding wavelength band, and the larger the proportion is, the larger the relative spectral power of the corresponding wavelength is, and the color rendering index can be changed at the same time. Based on the above, when the spectrum shape and the color rendering index are not satisfactory, the proportion of certain powder can be increased or decreased according to the specific wave band, or the color coordinate parameter of certain powder can be changed.

Basic research three: spectral shape versus phosphor film concentration. Research shows that under the condition of unchanged formula, the higher the concentration of the fluorescent powder is, the higher the relative spectral power of 490-700nm is until the relative spectral power of the blue light is exceeded, the color temperature is reduced along with the reduction of the relative spectral power of the blue light, the light color is changed, and the color rendering index is changed along with the change of the color temperature. Based on this, the color rendering index and the color temperature can be changed by changing the density. However, when the concentration is adjusted to a certain state and the color temperature is not in accordance with the requirement, the formulation ratio of each powder in the fluorescent film is also changed to ensure that the light color of different color temperatures conforms to the international standard (i.e. the color coordinate of the standard color temperature).

And fourthly, basic research: spectral shape and color temperature versus fluorescent film thickness. Studies have shown that the greater the thickness of the phosphor film, the lower the color temperature, with the same formulation and concentration. Based on this, when the colour temperature does not satisfy the requirement, can adjust the colour temperature through changing thickness, and it is little to other parameters influence.

Basic research five: the drive current is related to the spectral shape change. Research shows that the relation between the driving current and the change of the spectral shape is as follows: (1) increasing the drive current of either chip (blue or red) will change its corresponding spectral power; (2) the optimal spectrum optimization result can be obtained by adjusting the driving currents of the two chips; (3) increasing the drive current of one of the chips to increase its luminous flux suppresses the relative spectrum of the other chip. Based on this, the combined spectrum can be adjusted by adjusting the driving current, and the blue light can be suppressed, that is, the blue light can be suppressed by adding a red light chip.

And sixthly, basic research: red chip specification versus light radiation amount. Research shows that the relationship between the red chip specification and the light radiation quantity is as follows: under the condition of constant driving current, generally, as the chip specification increases, the light radiation quantity of the chip increases. Based on the above, the specification of the red light chip with the optimal selective valence ratio can be determined according to the final actual luminous flux ratio. The optimal cost performance means that the specification is as small as possible, the welding requirements can be met, the lighting effect is as high as possible, the reliability is good, and meanwhile, the price is considered.

The invention also carries out a seventh basic research: the relationship between the luminous flux of the white luminous body 21 and the near-natural light spectrum optimization is based on eight researches: the light radiation quantity of the red light chip is in optimized relation with the spectrum of the near natural light. The seventh basic research is carried out to find the specification of the blue light chip with the best (cost performance), the formula of the fluorescent film, the concentration and the thickness; searching a blue light chip and a fluorescent film which enable the light emitted by the first light emitter to be close to the natural spectrum as much as possible; the basic research eight aims to find the specification of the red chip with the best (cost performance), find the best value of the light radiation quantity (specification) of the red chip for inhibiting the blue light relative spectrum, and find the red chip for enabling the combined spectrum to be close to the natural spectrum as far as possible.

The basic research is a main theoretical basis for selecting the blue light chip, the fluorescent film and the red light chip and is also a theoretical basis for continuously optimizing parameters in the spectrum debugging process.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A quasi-natural light source of high red light is characterized by comprising a bearing substrate and at least one group of light-emitting units arranged on the surface of the bearing substrate, wherein the light-emitting units are electrically connected with a circuit structure arranged on the bearing substrate; each group of the light emitting units comprises a white light emitting body for emitting white light and a red light emitting body for emitting red light, wherein the red light is used for compensating the missing part of the white light relative to a natural spectrum to form quasi-natural light; the red luminous body comprises a red light chip, and the wavelength of the red light chip is 640-700 nm; the relative spectral power of 640-700nm red light in the quasi-natural light is more than 0.50.

2. The quasi-natural light source of high red light according to claim 1, wherein the red light chip is flip-chip or face-mounted on the carrier substrate, and the ratio of the total luminous flux of the white light to the total luminous radiation of the red light is 2-3: 1.

3. The quasi-natural light source of high red light according to claim 1, wherein the quasi-natural light has a color temperature ranging from 2500 to 6500K;

4. The quasi-natural light source of high red light according to claim 3,

the relative spectral power of red light with the wavelength of 680-690 nm in the quasi-natural light is more than 0.80;

5. The quasi-natural light source of high red light according to claim 1,

the relative spectral power of orange light with the wavelength of 597-622 nm in the quasi-natural light is more than 0.55;

6. The quasi-natural light source of claim 1, wherein the white light emitter comprises a blue light chip and a fluorescent film or a phosphorescent film disposed outside the blue light chip, the blue light chip is disposed on the carrier substrate in a face-up or flip-chip manner, the fluorescent film or the phosphorescent film comprises a colloid and fluorescent powder or phosphorescent powder mixed in the colloid, and the thickness of the fluorescent film or the phosphorescent film is 0.2-0.4 mm.

7. The quasi-natural light source of high red light according to claim 1, wherein said white light has the following characteristics:

8. The quasi-natural light source of high red light according to claim 1, wherein the quasi-natural light has a color temperature ranging from 2500 to 6500K; the quasi-natural light has a color rendering index Ra of more than 95, wherein the color rendering index of R9 is more than 90, and the color rendering index of R12 is more than 80; the quasi-natural light has a color tolerance of less than 5.

9. The quasi-natural light source of high red light according to claim 1, wherein the white light emitters and the red light emitters in each group of the light emitting units are connected in series and driven uniformly by the same driving current.

10. A luminaire comprising the high-red quasi-natural light source of any one of claims 1 to 9.