WO2022007095A1

WO2022007095A1 - Rayleigh scattering sunlight lamp

Info

Publication number: WO2022007095A1
Application number: PCT/CN2020/107790
Authority: WO
Inventors: 罗平平; 罗敏敏
Original assignee: 千奥星科南京生物科技有限公司
Priority date: 2020-07-08
Filing date: 2020-08-07
Publication date: 2022-01-13

Abstract

A rayleigh scattering sunlight lamp capable of effectively scattering light into blue sky light under the lack of natural light. The rayleigh scattering sunlight lamp consists of, from top to bottom, an LED light source array (1), a collimating lens array (2), a honeycomb core material (3), a diffusion plate (4) and a blue light scattering plate (5). The LED light source array (1) comprises a first collimating lens array (201), a second collimating lens array (203) and a lens body array (202) mounted between the first collimating lens array (201) and the second collimating lens array (203). The LED light source array (1) consists of several LED lamp beads (101). Each of the LED lamp beads (101) is placed on the focus of each of the first collimating lens arrays (201). The second collimating lens array (203) and the honeycomb core material (3) are arranged in an array corresponding to each other on a one-to-one basis. The diffusion plate (4) is used for converting a non-uniform light source into a plane light source with uniformly distributed and blurred dots. The blue light scattering plate (5) is used for diffusing transmitted white light or cold white light into blue light.

Description

A Rayleigh Scattered Sunlight

technical field

The invention relates to the field of optoelectronic technology, in particular to a Rayleigh scattering sunlight lamp.

Background technique

Currently, research shows that people perform better and feel more comfortable in indoor environments with sunlight. Daylight exposure reduces work stress and negative effects, enhances well-being and productivity, and in the long run, improves the physical and mental health of people living indoors.

However, due to certain factors, some places in the room cannot allow sunlight to come in. At this time, creating a virtual sun and a diffuse blue sky can be installed in offices, conference rooms, underground shopping malls and other places without natural light. Many closed offices and rooms can look claustrophobic and depressive when there is a clear field of vision, so Rayleigh diffused sunlight can solve this problem.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a Rayleigh scattering sunlight lamp, which can effectively solve the problem of the Rayleigh scattering sunlight lamp that can provide diffused blue sky light under the condition of lack of natural light.

For achieving the above object, technical scheme of the present invention is as follows:

A Rayleigh scattering sunlight lamp, comprising a sunlight lamp housing, the sunlight lamp housing is composed of an LED light source array, a collimating lens array, a honeycomb core material, a diffusing plate and a blue light diffusing plate in sequence from top to bottom. The collimating lens array includes a first collimating lens array, a second collimating lens array and a mirror body array installed between the first collimating lens array and the second collimating lens array, and the LED light source array is composed of several LED lights Each LED lamp bead is placed on the focal point of each first collimating lens array, the second collimating lens array is arranged in a one-to-one correspondence with the honeycomb core material, and the bottom surface of the honeycomb core material is attached with a diffuser plate , used to convert the uneven light source into a surface light source with uniform distribution and blurred dots; there is a certain diffusing space between the blue light scattering plate and the diffusing plate, and the blue light scattering plate is fixedly installed at the bottom of the sunlight lamp shell, with It is used to diffuse the white light or cool white light transmitted by the diffuser into blue light.

Further, the first collimating lens array is composed of a plurality of first collimating lenses, the side of each first collimating lens close to the LED light source is a light incident surface, and the side away from the LED light source is a light emitting surface, wherein the incident light surface is used. The surface is a concave surface, and the light-emitting surface is a spherical convex surface; the second collimating lens array is composed of a plurality of second collimating lenses, and the side of each second collimating lens close to the LED light source is the light incident surface, and the side away from the LED light source is the light incident surface. It is a light-emitting surface, wherein the light-incident surface is a plane surface, and the light-emitting surface is a spherical convex surface.

Further, the first collimating lens and the second collimating lens are transparent solid materials, including acrylic and glass.

Further, the mirror body array is a plurality of regular hexagonal prism bodies made of black solid material, and arranged in a honeycomb-like seamless splicing arrangement.

Further, the material of the honeycomb core material is one of aluminum alloy, glass fiber fabric impregnated with resin, aromatic fiber paper, kraft paper, graphite fiber or Kevlar fiber.

Further, the diffuser plate is made of PC, PMMA, or transparent glass attached with a diffusion film, wherein the transparent glass connected with the honeycomb core material is attached with a diffusion film on one side, or both sides of the transparent glass are attached with a diffusion film. Diffusion film.

Further, the blue light scattering plate is composed of a transparent base material and transparent titanium dioxide nanoparticles having different refractive indices relative to the transparent base material and having an average size significantly smaller than the wavelength of visible light, and the titanium dioxide nanoparticles can be embedded in the transparent base material, Or make titanium dioxide nanoparticles into nano-films and stick them on transparent substrates.

Further, the color temperature of each of the LED lamp beads is required to be above 5000K, and the dominant wavelength is 400nm-500nm.

Compared with the prior art, the beneficial effects of the present invention include: introducing the diffuse blue sky and the virtual sun into the indoor space, which can realize the lighting system, medical system, air purification system, and can be applied to indoor lighting, such as home lighting, underground shopping malls It can also be used for auxiliary treatment of depression, such as hospitals, rehabilitation centers, medical research institutions and other places that need lighting.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. in:

1 is a schematic structural diagram of a Rayleigh scattering sunlight lamp according to an embodiment of the present invention;

2 is a schematic diagram of a Rayleigh scattering sunlight lamp according to an embodiment of the present invention;

3 is a partial arrangement diagram of LED lamp beads according to an embodiment of the present invention;

4 is a schematic diagram of a partial structure of a collimating lens array according to an embodiment of the present invention;

5 is an arrangement diagram of a first collimating lens array according to an embodiment of the present invention;

6 is an arrangement diagram of a second collimating lens array according to an embodiment of the present invention;

7 is a schematic structural diagram of a first collimating lens according to an embodiment of the present invention;

8 is a schematic structural diagram of a second collimating lens according to an embodiment of the present invention;

9 is a schematic structural diagram of a honeycomb core material according to an embodiment of the present invention;

10 is a schematic structural diagram of a blue light scattering plate according to an embodiment of the present invention;

11 is another schematic structural diagram of a blue light scattering plate according to an embodiment of the present invention;

In the figure: 1. LED light source array, 101, LED lamp beads, 2. Collimating lens array, 201, First collimating lens array, 2011, First collimating lens, 202, Mirror body array, 203, Second collimating lens Straight lens array, 2031, Second collimating lens, 3, Honeycomb core material, 4, Diffuser plate, 5, Blue light diffusing plate, 501, Transparent substrate, 502, Titanium dioxide nanoparticles, 503, Titanium dioxide nanofilm, 6, Sun .

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

FIG. 1 shows a Rayleigh scattering sunlight lamp according to an embodiment of the present invention. The sunlight lamp is composed of an LED light source array 1 , a collimating lens array 2 , a honeycomb core material 3 , a diffuser plate 4 and blue light scattering in order from top to bottom. Board 5 composition.

The collimating lens array 2 includes a first collimating lens array 201 , a second collimating lens array 203 and a mirror body array 202 installed between the first collimating lens array 201 and the second collimating lens array 203 . The LED light source array 1 is composed of several LED lamp beads 101 , each LED lamp bead 101 is placed on the focal point of each first collimating lens array 201 , and the second collimating lens array 203 is in a one-to-one correspondence with the honeycomb core material 3 . The bottom surface of the honeycomb core material 3 is attached with a diffuser plate 4, which is used to convert the uneven light source into a surface light source with uniform distribution and blurred dots; there is a certain diffusion space between the blue light diffuser plate 5 and the diffuser plate 4, and The blue light diffusing plate 5 is fixedly installed at the bottom of the sunlight lamp housing, and is used for diffusing the white light or cool white light transmitted by the diffusing plate into blue light.

As shown in FIG. 3 , in this embodiment, in order to ensure uniform light intensity distribution, each LED lamp bead 101 is placed at the focal point of the collimating lens array 2 and arranged in a plum-shaped array. The color temperature of the light source of the LED lamp beads 101 generally requires 6000K to 8000K, or 5000K to 10000K, or more than 10000K. The main wavelength of the light source of the LED lamp bead 101 is 430-470 nm, or 400-500 nm.

4 to 8 , the first collimating lens array 201 is composed of a plurality of first collimating lenses 2011 , the side of each first collimating lens 2011 close to the LED light source is the light incident surface, and the side far from the LED light source is the light emitting surface The light-incident surface is concave, and the light-emitting surface is spherical convex. Similarly, the second collimating lens array 203 is composed of a plurality of second collimating lenses 2031. The side of each second collimating lens 2031 close to the LED light source is the light incident surface, and the side away from the LED light source is the light emitting surface. The smooth surface is a plane, and the light-emitting surface is a spherical convex surface.

Wherein, the first collimating lens 2011 and the second collimating lens 2031 are any transparent solid materials, including but not limited to acrylic, glass, etc. The light transmittance of the lenses is generally 90-93%, or in a larger range, such as Over 93% or under 80%.

The mirror body array 202 is a plurality of black regular hexagonal prisms, and is arranged in a honeycomb-like seamless splicing arrangement, and is arranged in a one-to-one correspondence with the first collimating lens array 201 and the second collimating lens array 203.

As shown in Figure 9, the honeycomb core material 3 is made of aluminum alloy, glass fiber fabric impregnated with resin, aromatic fiber paper, kraft paper, graphite fiber or Kevlar fiber. Light guide and heat dissipation.

The diffuser plate 4 is made of PC, PMMA, or transparent glass or transparent tempered glass with a diffuser film attached, wherein the diffuser film is attached to one side of the transparent glass connected to the honeycomb core material, or both sides of the transparent glass are attached. Diffusion film. The main function of the diffuser plate 4 is to convert the uneven light source into a surface light source with uniform distribution and blurred dots, and at the same time play the role of shielding the honeycomb core material or other optical defects; the second is to improve the viewing angle, increase the softness of the light source, and the third is to support Backlight architecture to avoid damage to the optical material above.

Specifically, the light transmittance of the diffuser plate 4 is generally required to be 85% to 90%, or 80% to 92%, or 75% to 95%. The haze of the diffuser plate 4 is generally required to be 65% to 75%, or 60% to 80%, or 55% to 85%.

The blue light scattering plate 5 is composed of a transparent substrate 501 and transparent titanium dioxide nanoparticles with different refractive indices relative to the transparent substrate 501 and an average size significantly smaller than the wavelength of visible light. Features.

As an embodiment of the present invention, as shown in FIG. 10 , the titanium dioxide nanoparticles 502 are evenly embedded in the transparent substrate 501 , and the transmitted white light or cool white light is absorbed and suppressed by the titanium dioxide particles 502 in the transparent substrate 501 to filter out sunlight. Medium and long wavelength components, blue light and violet light penetrate the blue light diffusing plate 5 .

As an embodiment of the present invention, as shown in FIG. 11 , titanium dioxide nano-particles 502 are made of titanium dioxide nano-film 503 and attached to the transparent substrate 501 , and the transmitted white light or cool white light is absorbed by the titanium dioxide nano-film 503 on the surface of the transparent substrate 501 . and suppression, filtering out the long-wavelength components of sunlight, blue light and violet light penetrating the blue light diffusing plate 5 .

Blue light scattering can be explained by Rayleigh scattering. Since the intensity of Rayleigh scattering is inversely proportional to the fourth power of wavelength, the wavelength of red light is longer, and the intensity of the scattered red light is very weak, while the wavelengths of blue and violet light are shorter. The scattering intensity is stronger. Therefore, atmospheric molecules are like a filter that filters out the long-wavelength components of sunlight, and sprinkles the remaining blue and violet light to the earth. The human eye is very insensitive to violet light, thus rendering the sky blue.

In order to meet the requirements of Rayleigh scattering, the diameter d of the nanoparticles must be much smaller than the wavelength λ of the incident light, usually the upper bound is about 1/10 of the wavelength of blue light, such as 48nm, at this time the diameter d of the nanoparticles can be 40nm, 30nm , 20nm, 10nm or 5nm.

As shown in FIG. 2 , the light emitted by the LED light source array is collimated into parallel light after passing through the collimating lens array 2 . The parallel light is guided to the diffuser plate 4 through the honeycomb core material 3, so that the light is more uniform and soft. Right above the observer, what is seen is the sun 6 (warm light) formed by the parallel light passing through the local honeycomb core material 3 within the horizon, while the light in other areas is blocked by the honeycomb core material, and what is seen is the blue light diffusing plate 5 The blue sky (cold light) formed by scattering.

The invention introduces the diffuse blue sky and virtual sun into the indoor space, which can realize the lighting system, medical system and air purification system, and can be applied to indoor lighting, such as home lighting, underground shopping malls, parking lots, conference rooms, office buildings, etc. Lighting places can also be used for auxiliary treatment of depression, such as hospitals, rehabilitation centers, medical research institutions and other places.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed by the present invention. Modifications or substitutions should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

A Rayleigh scattering sunlight lamp, comprising a sunlight lamp housing, characterized in that, the sunlight lamp housing is composed of an LED light source array, a collimating lens array, a honeycomb core material, a diffuser plate and a blue light diffuser plate in order from top to bottom. , the collimating lens array includes a first collimating lens array, a second collimating lens array and a mirror body array installed between the first collimating lens array and the second collimating lens array, and the LED light source array is composed of It is composed of several LED lamp beads, each LED lamp bead is placed on the focal point of each first collimating lens array, the second collimating lens array and the honeycomb core material are arranged in a one-to-one correspondence array, and the bottom surface of the honeycomb core material is pasted. There is a diffuser plate, which is used to convert the uneven light source into a surface light source with uniform distribution and blurred dots; there is a certain diffusing space between the blue light diffusing plate and the diffusing plate, and the blue light diffusing plate is fixedly installed on the sunlight lamp housing. The bottom of the diffuser is used to diffuse the white or cool white light transmitted by the diffuser into blue light.
The Rayleigh scattering sunlight lamp according to claim 1, wherein the first collimating lens array is composed of a plurality of first collimating lenses, and the side of each first collimating lens close to the LED light source is incident light The side away from the LED light source is the light-emitting surface, wherein the light-incident surface is a concave surface, and the light-emitting surface is a spherical convex surface; the second collimating lens array is composed of a plurality of second collimating lenses, and each second collimating lens is close to One side of the LED light source is the light incident surface, and the side away from the LED light source is the light emitting surface, wherein the light incident surface is a plane, and the light emitting surface is a spherical convex surface.
The Rayleigh scattering sunlight lamp according to claim 1 or 2, wherein the first collimating lens and the second collimating lens are transparent solid materials, including acrylic and glass.
The Rayleigh diffused sunlight lamp according to claim 1, wherein the mirror body array is a plurality of regular hexagonal prisms made of black solid material, and arranged in a honeycomb shape with seamless splicing.
The Rayleigh scattering sunlight lamp according to claim 1, wherein the material of the honeycomb core material is aluminum alloy, glass fiber fabric impregnated with resin, aromatic fiber paper, kraft paper, graphite fiber or Kevlar fiber a kind of.
The Rayleigh scattering sunlight lamp according to claim 1, wherein the diffuser plate is made of PC, PMMA, or transparent glass attached with a diffuser film, wherein one side of the transparent glass connected to the honeycomb core material is A diffusion film is attached, or a diffusion film is attached to both sides of the transparent glass.
The Rayleigh scattering sunlight lamp according to claim 1, wherein the blue light scattering plate is composed of a transparent base material and transparent titanium dioxide nanoparticles having different refractive indices relative to the transparent base material and having an average size significantly smaller than the wavelength of visible light, The titanium dioxide nanoparticles can be embedded in the transparent substrate, or the titanium dioxide nanoparticles can be made into nano-films and pasted on the transparent substrate.
The Rayleigh scattering sunlight lamp according to claim 1, wherein the color temperature of each LED lamp bead is required to be above 5000K, and the dominant wavelength is 400nm-500nm.