KR102393779B1 - Led lighting for antibacteria - Google Patents

Abstract

The present invention emits a target light having a special wavelength from the side, and emits a general white light to the center to perform a special antibacterial function without using a method such as color conversion or wavelength conversion, while enabling the use of general lighting at the same time. .
Antibacterial LED lighting according to an aspect of the present invention includes a first LED unit emitting light of 405 to 415 nm and a second LED unit emitting white light, wherein the light emitting area of the first LED unit and the second LED unit is mutually In this case, the substrate on which the first LED is mounted in the first LED unit and the substrate on which the second LED is mounted in the second LED unit may be spaced apart from each other.

Description

Antibacterial LED Lighting {LED LIGHTING FOR ANTIBACTERIA}

The present invention relates to LED lighting, and more particularly, to an antibacterial LED lighting that performs an antibacterial function while performing a role of white lighting.

LED devices are in the spotlight as light sources for various lighting devices. The LED element has advantages such as less heat generation, less power consumption, long lifespan, and impact resistance compared to the conventional illumination light source. In addition, there is an advantage that does not cause environmental pollution because mercury or discharge gas is not used like a fluorescent lamp in the manufacturing process.

The LED refers to a device that uses the p-n junction structure of a semiconductor to make injected minority carriers (electrons or holes) and emits a predetermined light by recombination thereof. There are light emitting diodes, blue light emitting diodes using an InGaN/AlGaN double hetero structure, and the like, and recently, light emitting diodes emitting ultraviolet (UV) or infrared (IR) light have been developed.

Implementing white light used for general lighting using such LEDs is the most commercialized state. In this case, white light may be realized mainly by coupling the phosphor mold to the light emitting diode chip. For example, by arranging a phosphor mold that emits yellow-green or yellow light as an excitation source with a part of the light on the upper part of the light-emitting diode chip that emits blue light, white can be obtained by the blue light emission of the light-emitting diode chip and yellow-green or yellow light emission of the phosphor. there is.

That is, white light can be realized by a combination of a blue light emitting diode chip made of a semiconductor component emitting a wavelength of 430 nm to 480 nm and a phosphor capable of generating yellow light using blue light as an excitation source. In other words, a method of inducing white color with a combination of blue of the LED and yellow of the phosphor was used by excitation of a yellow YAG-based phosphor with light having sufficiently high energy emitted from a high-brightness blue LED to emit light in the yellow region.

Recently, there is a trend to develop lighting for various uses other than white lighting using LEDs. Examples are the use of light of various colors for LED therapy or the use of infrared LEDs for plant growth.

However, LED lighting having a special purpose such as plant growth has a problem in that it appears as a specific color depending on the target wavelength. For this purpose, a method of mixing white light has also appeared, but this also has a very poor quality as a daily lighting because the color depends on the main target wavelength.

[Prior art document 1]

Korean Patent Publication No. 10-2019-0027500 (2017. 6. 25.)

The present invention is to solve the above problems of the prior art, and an object of the present invention is to emit white light with a different optical path while using 405 to 415 nm light as the main wavelength in order to fulfill the special purpose of antibacterial, so that the basic lighting This is to provide antibacterial LED lighting that faithfully performs its function.

Antibacterial LED lighting according to an aspect of the present invention includes a first LED unit emitting light of 405 to 415 nm, and a second LED unit emitting white light, wherein the light emitting area of the first LED unit and the second LED unit is mutually is compartmentalized.

In this case, the substrate on which the first LED is mounted in the first LED unit and the substrate on which the second LED is mounted in the second LED unit may be spaced apart from each other.

In addition, a blocking plate is installed in a region between the first LED unit and the second LED unit, and the light emitted from the first LED unit and the second LED unit may be divided into an optical path by the blocking plate.

In addition, the blocking plate may be formed of a light reflective material.

In addition, the antibacterial LED lighting may further include a diffusion plate, and the diffusion plate may be in contact with the blocking plate.

In addition, the diffusion plate may be integrally formed to form a first light emitting area in a region corresponding to the first LED unit and a second light emitting area in an area corresponding to the second LED unit.

In the diffusion plate, a region between the first LED unit and the second LED unit forms a third light emitting area, and the width of the third light emitting area is 1/3 to 1/5 of the first light emitting area. can be

In addition, the thickness of the diffusion plate may be formed to be different from each other in regions corresponding to the first LED unit and the second LED unit.

In addition, the antibacterial LED lighting may further include a control unit, the second LED unit may continuously control light emission, and the first LED unit may control light emission continuously or in pulses.

In addition, in the antibacterial LED lighting according to another aspect of the present invention, a blocking plate is installed in a region between the first LED unit and the second LED unit, and the blocking plate is disposed to surround a part or all of the first LED unit. can be formed.

The present invention emits a target light having a special wavelength from the side, and emits a general white light to the center to perform a special antibacterial function without using a method such as color conversion or wavelength conversion, while enabling the use of general lighting at the same time. .

In addition, since the present invention clearly divides the light emitting area of the antibacterial light and the illumination light, the user can know that the antibacterial action is also continuously performed while looking at the general white light.

In addition, according to the present invention, a separate blocking plate is installed in order to clearly partition the light emitting area, and it is brought into contact with the diffusion plate to significantly suppress the interference and mixing of both light.

1 is a perspective view of an antibacterial LED light according to an embodiment of the present invention.
FIG. 2 is a plan view showing the inside of the diffuser plate in FIG. 1 removed.
FIG. 3 is a view showing the UV LED shown by the enlarged circle 30a in FIG. 2 in more detail.
FIG. 4 is a diagram illustrating in more detail a white LED shown by an enlarged circle 40a in FIG. 2 .
5 is a diagram schematically illustrating an enlarged circle C of FIG. 2 to explain the operation of the present invention.
6 is a plan view of an antibacterial LED light according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those skilled in the art can easily implement them. Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, an antibacterial LED lighting according to an embodiment of the present invention will be described. 1 is a perspective view of an antibacterial LED light according to an embodiment of the present invention, FIG. 2 is a plan view showing the inside with the diffuser plate removed in FIG. 1, and FIG. 3 is a UV shown by an enlarged circle 30a in FIG. It is a view showing the LED in more detail, and FIG. 4 is a view showing the white LED shown by the enlarged circle 40a in FIG. 2 in more detail.

First, referring to FIG. 1 , the antibacterial LED light 100 according to an embodiment of the present invention is made of a flat light in the form of a downlight. 1 shows the appearance of the antibacterial LED lighting 100, the frame 10 and the diffusion plate 20 can be confirmed. The frame 10 serves to fix and fasten the substrates 35 and 45, the LEDs 30a and 40a mounted on the substrate, and the diffusion plate 20 in the flat LED lighting. 1 exemplifies a light emitting surface, and a converter 50 serving as a control unit may be attached to the opposite surface.

At this time, the antibacterial LED lighting 100 according to an embodiment of the present invention is characterized in that the light emitting area is partitioned. That is, as the regions are separated by reference numerals A1 and A2 in FIG. 1 , the light emitted from each other is different. Therefore, the target light having a special wavelength is emitted in the A1 area, and the general white light is emitted in the A2 area, so that it is possible to function as a special antibacterial and general lighting without using methods such as color conversion or wavelength conversion.

To this end, the antibacterial LED lighting according to the present embodiment has a unique internal structure. 2, the antibacterial LED lighting 100 according to this embodiment has a first LED part 30 emitting antibacterial light of 405 to 415 nm therein and a second LED part emitting white light as general lighting ( 40) is included. Also, as shown, the first LED unit 30 is arranged on both sides of the second LED unit 40 to clearly partition both light emitting areas. Accordingly, since the emitted light from each area is clearly separated, the user can see that the antibacterial action is continuously performed while looking at the general white light by looking at the light emission of the first LED unit.

In this case, the first LED unit 30 includes a first PCB substrate 35 and a first LED 30a mounted thereon. Referring to FIG. 3 , the first LED 30a includes a first substrate 31 , a first bare chip 32 formed on the first substrate, and a light-transmitting encapsulant 33 formed to cover the first bare chip 32 . ), and a first reflector 34 that promotes separation from neighboring light sources and smooth light emission. In this case, the encapsulant 33 may be formed in a lens structure, and may be omitted depending on the process.

The first substrate 31 is a printed circuit board (PCB) including a substrate body formed of a ceramic, such as silicon, aluminum, copper, or an alloy material containing the same and a plurality of electrode patterns formed on the substrate body. can be The first bare chip 32 is mounted on the substrate 31 and connected to the electrode pattern on the substrate 31 . In addition, the first bare chip 32 operates by electric power input through the electrode pattern to emit UV light having a wavelength of approximately 405 nm to 415 nm to emit antibacterial light.

The encapsulant 33 is formed on the first substrate 31 to individually encapsulate the first bare chip 32 , and constitutes a UV light source together with the first bare chip 32 . In this case, the encapsulant 33 may have various lens shapes in addition to the substantially hemispherical lens shape as shown.

In the present embodiment, a plurality of chip mounting grooves (not shown) are formed on the substrate 31 , and the first bare chip 32 may be mounted therein. Electrode patterns for applying power to the first bare chip 32 may be at least partially formed in the chip mounting groove.

In addition, referring to FIG. 4 , the second LED unit 40 includes a second PCB board 45 and a second LED 40a mounted thereon. Referring to FIG. 4 , the second LED 40a includes a second substrate 41 , a second bare chip 42 , and a phosphor layer 43 . In addition, as shown, it may further include a reflector (44).

The second substrate 41 may be any substrate capable of mounting the second bare chips 42 at a high density. For example, but not limited to, the second substrate 41 may include alumina, quartz, calcium zirconate, forsterite, SiC, graphite, fusedsilica. ), mullite, cordierite, zirconia, beryllia, and aluminum nitride, LTCC (low temperature co-fired ceramic), and the like.

The second substrate 41 may be formed of a straight, circular, or polygonal plate, and may have a rectangular shape as shown in FIG. 2 . A first wire and a second wire for supplying power to the second bare chip 2 may be provided on the second substrate 41 . However, the second LED 40a according to the present embodiment is electrically connected to the second bare chip 42 and the second substrate 41 through soldering, and may not have a separate bonding wire. In this case, the terminals formed on the second bare chip 42 are electrically connected to the second base board 41 , and may be formed using a surface mount technology (SMT).

In this case, the second bare chip 42 is a blue light-emitting LED chip, and may be made of, for example, a semiconductor component emitting a wavelength of 460 nm to 480 nm.

The phosphor layer 43 emits blue light emitted from the LED bare chip 20 as white light in a band of 490 nm to 700 nm, so that yellow, green, or red-based phosphors are distributed in a silicon matrix. By the way, in the second LED 40a according to this embodiment, the silicon matrix is 85 to 89 wt%, the yellow phosphor is 10 to 14 wt%, and the red phosphor is 0.1 to 0.9 wt%, so that the commonly used 445 to Instead of emitting light in the 455 nm band, it is possible to right-deflect the light spectrum as much as possible for the effect of additional insect repellent, so that the light of 460 to 480 nm is emitted.

On the other hand, the first PCB substrate 35 on which the first LED 30a is mounted in the first LED unit 30 and the second PCB substrate 35 on which the second LED 40a is mounted in the second LED unit 40 ( 45) are spaced apart from each other. This is to install the blocking plate 60 according to the present embodiment between them.

As shown in FIG. 2 , in the antibacterial LED lighting 100 according to this embodiment, the blocking plate 60 is installed in the region between the first LED unit 30 and the second LED unit 40 , so the first The light emitted from the LED unit 30 and the second LED unit 40 is divided into an optical path by the blocking plate 60 .

5 is a diagram schematically illustrating an enlarged circle C of FIG. 2 to explain the operation of the present invention. Referring to the drawings, in this case, the blocking plate 60 may be made of a light reflective material or may be formed by coating a light reflective material on the surface. Accordingly, the first LED unit and the second LED unit are partitioned and the light emitted from each area is reflected so that the characteristics of both light are not deteriorated.

On the other hand, the antibacterial LED lighting 100 according to the present embodiment further includes the diffusion plate 20 mentioned in FIG. It is preferable that the diffusion plate is integrally formed in terms of a beautiful appearance and a manufacturing cost. At this time, as shown in FIG. 5 , the diffusion plate 20 is installed to contact the blocking plate 60 . Accordingly, the light leakage phenomenon is remarkably suppressed to further suppress the mixing of light emitted from each light emitting area.

Accordingly, in the diffusion plate 20 , the first light emitting region L1 is formed in the region corresponding to the first LED unit 30 , and the second light emitting region L2 is formed in the region corresponding to the second LED unit 40 . ) so that each of the illumination light and the functional light emits clearly.

Meanwhile, as shown in FIG. 5 , both the first LED 30a and the second LED 30b may emit light (a) in a straight direction or light in a lateral direction ((b)). The light (b) in the lateral direction is reflected by the blocking plate 60 and finally emitted to each area as partitioned by A1 and A2 in FIG. 1 , but some light guides ((() c))) and the region between the first LED unit 30 and the second LED unit 40 according to light interference at the time of leaving the diffusion plate may form a third light emitting region L3. The light emitting region L3 serves to partially deflect the spectrum of white light to the right, and thus the second LED unit contributes to emitting special purpose light other than general lighting. It is preferable to form 1/3 to 1/5 of the first light emitting area.

On the other hand, when a separate light guide plate is not used, a dot appearance phenomenon in which each LED constituting the first LED unit 30 and the second LED unit 40 is prominent may occur. Accordingly, it is also desirable to reduce the dot visibility of any one part by forming the diffuser plate 20 to have different thicknesses in the regions corresponding to the first LED part 30 and the second LED part 40 depending on the purpose.

On the other hand, there is still insufficient research on the effect of the light of 405 nm to 415 nm emitted by the first LED unit 40 on the user when the light is continuously emitted. Accordingly, the converter or control unit 50 continuously emits white light from the second LED unit, and it may also be desirable to alternately perform continuous or pulsed output of the second LED unit for visible UV light.

Hereinafter, an antibacterial LED lighting according to another embodiment of the present invention will be described. 6 is a plan view of an antibacterial LED light 200 according to another embodiment of the present invention. In this embodiment, the same reference numerals are assigned to the same components as in the above-described embodiment, and the same descriptions will be omitted.

Referring to FIG. 6 , in the antibacterial LED lighting 200 according to the present embodiment, a blocking plate 160 is installed in the region between the first LED unit 30 and the second LED unit 40 so that the first LED unit ( 30 ) and the second LED unit 40 , the light path is divided by the blocking plate 160 , and further, the blocking plate 160 is formed to surround the first LED unit 30 .

In this case, the blocking plate 160 is installed to be in contact with the above-described diffusion plate 20 . Therefore, the light leakage phenomenon is more significantly suppressed to further suppress the mixing of the light emitted from each light emitting area. In this case, the third light emitting region L3 described with reference to FIG. 5 may emit light in the same shape due to the blocking plate 160 being formed in the shape of a reflection angle or a hemisphere. Therefore, it becomes possible to display various antibacterial functional lights while suppressing the mixing of light.

As described above, preferred embodiments of the present invention have been disclosed in the present specification and drawings, and although specific terms are used, these are only used in a general sense to easily explain the technical content of the present invention and to help the understanding of the present invention. , it is not intended to limit the scope of the present invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

100: antibacterial LED light
10: frame
20: diffuser plate
30: first LED unit
30a: first LED
31: first substrate
32: first bare chip
33: encapsulant
34: first reflector
35, 135: first PCB board
40: second LED unit
40a: second LED
41: second substrate
42: second bare chip
43: phosphor layer
44: second reflector
45: second PCB board
50: control unit
60, 160: blocking plate
L1: first light emitting region
L2: second light emitting region
L3: third light emitting region

Claims (10)

In the antibacterial LED lighting,
a first LED unit emitting light of 405 to 415 nm;
a second LED unit emitting white light;
The light emitting regions of the first LED unit and the second LED unit are partitioned from each other,
The second LED unit includes an LED bare chip and a phosphor, and the LED bare chip emits light of 445 to 455 nm or 460 to 480 nm,
A first light emitting area is formed in a region corresponding to the first LED unit, a second light emitting area is formed in an area corresponding to the second LED unit, and a region between the first LED unit and the second LED unit is forming a third light emitting region,
A blocking plate is installed in a region between the first LED unit and the second LED unit, and the light emitted from the first LED unit and the second LED unit is divided into an optical path by the blocking plate,
The antibacterial LED light further includes a diffusion plate, the diffusion plate being in contact with the blocking plate,
In the diffusion plate, a region between the first LED unit and the second LED unit forms a third light emitting area, and a width of the third light emitting area is 1/5 to 1/3 of that of the first light emitting area. Antibacterial LED lighting, characterized in that the light spectrum emitted from the second light emitting region is deflected to the right.
According to claim 1,
Antibacterial LED lighting, characterized in that the substrate on which the first LED is mounted in the first LED unit and the substrate on which the second LED is mounted in the second LED unit are spaced apart from each other.
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